VT_Player/third_party/gotk3/gtk/gtk.go

// Copyright (c) 2013-2014 Conformal Systems <info@conformal.com>
//
// This file originated from: http://opensource.conformal.com/
//
// Permission to use, copy, modify, and distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

// Go bindings for GTK+ 3.  Supports version 3.6 and later.
//
// Functions use the same names as the native C function calls, but use
// CamelCase.  In cases where native GTK uses pointers to values to
// simulate multiple return values, Go's native multiple return values
// are used instead.  Whenever a native GTK call could return an
// unexpected NULL pointer, an additional error is returned in the Go
// binding.
//
// GTK's C API documentation can be very useful for understanding how the
// functions in this package work and what each type is for.  This
// documentation can be found at https://developer.gnome.org/gtk3/.
//
// In addition to Go versions of the C GTK functions, every struct type
// includes a method named Native (either by direct implementation, or
// by means of struct embedding).  These methods return a uintptr of the
// native C object the binding type represents.  These pointers may be
// type switched to a native C pointer using unsafe and used with cgo
// function calls outside this package.
//
// Memory management is handled in proper Go fashion, using runtime
// finalizers to properly free memory when it is no longer needed.  Each
// time a Go type is created with a pointer to a GObject, a reference is
// added for Go, sinking the floating reference when necessary.  After
// going out of scope and the next time Go's garbage collector is run, a
// finalizer is run to remove Go's reference to the GObject.  When this
// reference count hits zero (when neither Go nor GTK holds ownership)
// the object will be freed internally by GTK.
package gtk

// #cgo pkg-config: gdk-3.0 gio-2.0 glib-2.0 gobject-2.0 gtk+-3.0
// #include <gio/gio.h>
// #include <gtk/gtk.h>
// #include "gtk.go.h"
import "C"
import (
	"errors"
	"fmt"
	"reflect"
	"runtime"
	"sync"
	"unsafe"

	"github.com/gotk3/gotk3/cairo"
	"github.com/gotk3/gotk3/gdk"
	"github.com/gotk3/gotk3/glib"
	"github.com/gotk3/gotk3/internal/callback"
	"github.com/gotk3/gotk3/pango"
)

func init() {
	tm := []glib.TypeMarshaler{
		// Enums
		{glib.Type(C.gtk_align_get_type()), marshalAlign},
		{glib.Type(C.gtk_accel_flags_get_type()), marshalAccelFlags},
		{glib.Type(C.gtk_accel_group_get_type()), marshalAccelGroup},
		{glib.Type(C.gtk_accel_map_get_type()), marshalAccelMap},
		{glib.Type(C.gtk_arrow_placement_get_type()), marshalArrowPlacement},
		{glib.Type(C.gtk_arrow_type_get_type()), marshalArrowType},
		{glib.Type(C.gtk_assistant_page_type_get_type()), marshalAssistantPageType},
		{glib.Type(C.gtk_buttons_type_get_type()), marshalButtonsType},
		{glib.Type(C.gtk_calendar_display_options_get_type()), marshalCalendarDisplayOptions},
		{glib.Type(C.gtk_cell_renderer_accel_mode_get_type()), marshalCellRendererAccelMode},
		{glib.Type(C.gtk_cell_renderer_mode_get_type()), marshalCellRendererMode},
		{glib.Type(C.gtk_cell_renderer_state_get_type()), marshalCellRendererState},
		{glib.Type(C.gtk_corner_type_get_type()), marshalCornerType},
		{glib.Type(C.gtk_dest_defaults_get_type()), marshalDestDefaults},
		{glib.Type(C.gtk_dialog_flags_get_type()), marshalDialogFlags},
		{glib.Type(C.gtk_entry_icon_position_get_type()), marshalEntryIconPosition},
		{glib.Type(C.gtk_file_chooser_action_get_type()), marshalFileChooserAction},
		{glib.Type(C.gtk_icon_lookup_flags_get_type()), marshalSortType},
		{glib.Type(C.gtk_icon_size_get_type()), marshalIconSize},
		{glib.Type(C.gtk_image_type_get_type()), marshalImageType},
		{glib.Type(C.gtk_input_hints_get_type()), marshalInputHints},
		{glib.Type(C.gtk_input_purpose_get_type()), marshalInputPurpose},
		{glib.Type(C.gtk_direction_type_get_type()), marshalDirectionType},
		{glib.Type(C.gtk_justification_get_type()), marshalJustification},
		{glib.Type(C.gtk_license_get_type()), marshalLicense},
		{glib.Type(C.gtk_message_type_get_type()), marshalMessageType},
		{glib.Type(C.gtk_orientation_get_type()), marshalOrientation},
		{glib.Type(C.gtk_pack_type_get_type()), marshalPackType},
		{glib.Type(C.gtk_path_type_get_type()), marshalPathType},
		{glib.Type(C.gtk_policy_type_get_type()), marshalPolicyType},
		{glib.Type(C.gtk_position_type_get_type()), marshalPositionType},
		{glib.Type(C.gtk_relief_style_get_type()), marshalReliefStyle},
		{glib.Type(C.gtk_response_type_get_type()), marshalResponseType},
		{glib.Type(C.gtk_selection_mode_get_type()), marshalSelectionMode},
		{glib.Type(C.gtk_scroll_type_get_type()), marshalScrollType},
		{glib.Type(C.gtk_scroll_step_get_type()), marshalScrollStep},
		{glib.Type(C.gtk_sensitivity_type_get_type()), marshalSensitivityType},
		{glib.Type(C.gtk_shadow_type_get_type()), marshalShadowType},
		{glib.Type(C.gtk_sort_type_get_type()), marshalSortType},
		{glib.Type(C.gtk_spin_button_update_policy_get_type()), marshalSpinButtonUpdatePolicy},
		{glib.Type(C.gtk_spin_type_get_type()), marshalSpinType},
		{glib.Type(C.gtk_state_flags_get_type()), marshalStateFlags},
		{glib.Type(C.gtk_target_flags_get_type()), marshalTargetFlags},
		{glib.Type(C.gtk_text_direction_get_type()), marshalTextDirection},
		{glib.Type(C.gtk_text_search_flags_get_type()), marshalTextSearchFlags},
		{glib.Type(C.gtk_toolbar_style_get_type()), marshalToolbarStyle},
		{glib.Type(C.gtk_tree_model_flags_get_type()), marshalTreeModelFlags},
		{glib.Type(C.gtk_window_position_get_type()), marshalWindowPosition},
		{glib.Type(C.gtk_window_type_get_type()), marshalWindowType},
		{glib.Type(C.gtk_wrap_mode_get_type()), marshalWrapMode},

		// Objects/Interfaces
		{glib.Type(C.gtk_accel_group_get_type()), marshalAccelGroup},
		{glib.Type(C.gtk_accel_map_get_type()), marshalAccelMap},
		{glib.Type(C.gtk_adjustment_get_type()), marshalAdjustment},
		{glib.Type(C.gtk_application_get_type()), marshalApplication},
		{glib.Type(C.gtk_application_window_get_type()), marshalApplicationWindow},
		{glib.Type(C.gtk_assistant_get_type()), marshalAssistant},
		{glib.Type(C.gtk_bin_get_type()), marshalBin},
		{glib.Type(C.gtk_builder_get_type()), marshalBuilder},
		{glib.Type(C.gtk_button_get_type()), marshalButton},
		{glib.Type(C.gtk_button_box_get_type()), marshalButtonBox},
		{glib.Type(C.gtk_box_get_type()), marshalBox},
		{glib.Type(C.gtk_calendar_get_type()), marshalCalendar},
		{glib.Type(C.gtk_cell_layout_get_type()), marshalCellLayout},
		{glib.Type(C.gtk_cell_editable_get_type()), marshalCellEditable},
		{glib.Type(C.gtk_cell_renderer_get_type()), marshalCellRenderer},
		{glib.Type(C.gtk_cell_renderer_spinner_get_type()), marshalCellRendererSpinner},
		{glib.Type(C.gtk_cell_renderer_pixbuf_get_type()), marshalCellRendererPixbuf},
		{glib.Type(C.gtk_cell_renderer_text_get_type()), marshalCellRendererText},
		{glib.Type(C.gtk_cell_renderer_progress_get_type()), marshalCellRendererProgress},
		{glib.Type(C.gtk_cell_renderer_toggle_get_type()), marshalCellRendererToggle},
		{glib.Type(C.gtk_cell_renderer_combo_get_type()), marshalCellRendererCombo},
		{glib.Type(C.gtk_cell_renderer_accel_get_type()), marshalCellRendererAccel},
		{glib.Type(C.gtk_cell_renderer_spin_get_type()), marshalCellRendererSpin},
		{glib.Type(C.gtk_check_button_get_type()), marshalCheckButton},
		{glib.Type(C.gtk_check_menu_item_get_type()), marshalCheckMenuItem},
		{glib.Type(C.gtk_clipboard_get_type()), marshalClipboard},
		{glib.Type(C.gtk_container_get_type()), marshalContainer},
		{glib.Type(C.gtk_css_provider_get_type()), marshalCssProvider},
		{glib.Type(C.gtk_dialog_get_type()), marshalDialog},
		{glib.Type(C.gtk_drawing_area_get_type()), marshalDrawingArea},
		{glib.Type(C.gtk_editable_get_type()), marshalEditable},
		{glib.Type(C.gtk_entry_get_type()), marshalEntry},
		{glib.Type(C.gtk_entry_buffer_get_type()), marshalEntryBuffer},
		{glib.Type(C.gtk_entry_completion_get_type()), marshalEntryCompletion},
		{glib.Type(C.gtk_event_box_get_type()), marshalEventBox},
		{glib.Type(C.gtk_expander_get_type()), marshalExpander},
		{glib.Type(C.gtk_file_chooser_get_type()), marshalFileChooser},
		{glib.Type(C.gtk_file_chooser_button_get_type()), marshalFileChooserButton},
		{glib.Type(C.gtk_file_chooser_dialog_get_type()), marshalFileChooserDialog},
		{glib.Type(C.gtk_file_chooser_widget_get_type()), marshalFileChooserWidget},
		{glib.Type(C.gtk_frame_get_type()), marshalFrame},
		{glib.Type(C.gtk_aspect_frame_get_type()), marshalAspectFrame},
		{glib.Type(C.gtk_grid_get_type()), marshalGrid},
		{glib.Type(C.gtk_icon_view_get_type()), marshalIconView},
		{glib.Type(C.gtk_image_get_type()), marshalImage},
		{glib.Type(C.gtk_label_get_type()), marshalLabel},
		{glib.Type(C.gtk_link_button_get_type()), marshalLinkButton},
		{glib.Type(C.gtk_lock_button_get_type()), marshalLockButton},
		{glib.Type(C.gtk_layout_get_type()), marshalLayout},
		{glib.Type(C.gtk_tree_model_sort_get_type()), marshalTreeModelSort},
		{glib.Type(C.gtk_list_store_get_type()), marshalListStore},
		{glib.Type(C.gtk_menu_get_type()), marshalMenu},
		{glib.Type(C.gtk_menu_bar_get_type()), marshalMenuBar},
		{glib.Type(C.gtk_menu_button_get_type()), marshalMenuButton},
		{glib.Type(C.gtk_menu_item_get_type()), marshalMenuItem},
		{glib.Type(C.gtk_menu_shell_get_type()), marshalMenuShell},
		{glib.Type(C.gtk_message_dialog_get_type()), marshalMessageDialog},
		{glib.Type(C.gtk_notebook_get_type()), marshalNotebook},
		{glib.Type(C.gtk_offscreen_window_get_type()), marshalOffscreenWindow},
		{glib.Type(C.gtk_orientable_get_type()), marshalOrientable},
		{glib.Type(C.gtk_overlay_get_type()), marshalOverlay},
		{glib.Type(C.gtk_paned_get_type()), marshalPaned},
		{glib.Type(C.gtk_progress_bar_get_type()), marshalProgressBar},
		{glib.Type(C.gtk_radio_button_get_type()), marshalRadioButton},
		{glib.Type(C.gtk_radio_menu_item_get_type()), marshalRadioMenuItem},
		{glib.Type(C.gtk_range_get_type()), marshalRange},
		{glib.Type(C.gtk_scale_button_get_type()), marshalScaleButton},
		{glib.Type(C.gtk_scale_get_type()), marshalScale},
		{glib.Type(C.gtk_scrollbar_get_type()), marshalScrollbar},
		{glib.Type(C.gtk_scrolled_window_get_type()), marshalScrolledWindow},
		{glib.Type(C.gtk_search_entry_get_type()), marshalSearchEntry},
		{glib.Type(C.gtk_selection_data_get_type()), marshalSelectionData},
		{glib.Type(C.gtk_separator_get_type()), marshalSeparator},
		{glib.Type(C.gtk_separator_menu_item_get_type()), marshalSeparatorMenuItem},
		{glib.Type(C.gtk_separator_tool_item_get_type()), marshalSeparatorToolItem},
		{glib.Type(C.gtk_spin_button_get_type()), marshalSpinButton},
		{glib.Type(C.gtk_spinner_get_type()), marshalSpinner},
		{glib.Type(C.gtk_statusbar_get_type()), marshalStatusbar},
		{glib.Type(C.gtk_switch_get_type()), marshalSwitch},
		{glib.Type(C.gtk_text_view_get_type()), marshalTextView},
		{glib.Type(C.gtk_text_tag_get_type()), marshalTextTag},
		{glib.Type(C.gtk_text_tag_table_get_type()), marshalTextTagTable},
		{glib.Type(C.gtk_text_buffer_get_type()), marshalTextBuffer},
		{glib.Type(C.gtk_toggle_button_get_type()), marshalToggleButton},
		{glib.Type(C.gtk_toolbar_get_type()), marshalToolbar},
		{glib.Type(C.gtk_tool_button_get_type()), marshalToolButton},
		{glib.Type(C.gtk_toggle_tool_button_get_type()), marshalToggleToolButton},
		{glib.Type(C.gtk_tool_item_get_type()), marshalToolItem},
		{glib.Type(C.gtk_tooltip_get_type()), marshalTooltip},
		{glib.Type(C.gtk_tree_model_get_type()), marshalTreeModel},
		{glib.Type(C.gtk_tree_sortable_get_type()), marshalTreeSortable},
		{glib.Type(C.gtk_tree_selection_get_type()), marshalTreeSelection},
		{glib.Type(C.gtk_tree_store_get_type()), marshalTreeStore},
		{glib.Type(C.gtk_tree_view_get_type()), marshalTreeView},
		{glib.Type(C.gtk_tree_view_column_get_type()), marshalTreeViewColumn},
		{glib.Type(C.gtk_cell_area_get_type()), marshalCellArea},
		{glib.Type(C.gtk_cell_area_context_get_type()), marshalCellAreaContext},
		{glib.Type(C.gtk_cell_area_box_get_type()), marshalCellAreaBox},
		{glib.Type(C.gtk_viewport_get_type()), marshalViewport},
		{glib.Type(C.gtk_volume_button_get_type()), marshalVolumeButton},
		{glib.Type(C.gtk_widget_get_type()), marshalWidget},
		{glib.Type(C.gtk_window_get_type()), marshalWindow},
		{glib.Type(C.gtk_window_group_get_type()), marshalWindowGroup},

		// Boxed
		{glib.Type(C.gtk_target_entry_get_type()), marshalTargetEntry},
		{glib.Type(C.gtk_text_iter_get_type()), marshalTextIter},
		{glib.Type(C.gtk_text_mark_get_type()), marshalTextMark},
		{glib.Type(C.gtk_tree_iter_get_type()), marshalTreeIter},
		{glib.Type(C.gtk_tree_path_get_type()), marshalTreePath},
	}
	glib.RegisterGValueMarshalers(tm)
}

/*
 * Callback helpers
 */

//export gotk3_callbackDelete
func gotk3_callbackDelete(callbackID C.gpointer) {
	callback.Delete(uintptr(callbackID))
}

/*
 * Type conversions
 */

func gbool(b bool) C.gboolean {
	if b {
		return C.gboolean(1)
	}
	return C.gboolean(0)
}

func gobool(b C.gboolean) bool {
	return b != C.FALSE
}

func cGSList(clist *glib.SList) *C.GSList {
	if clist == nil {
		return nil
	}
	return (*C.GSList)(unsafe.Pointer(clist.Native()))
}

func free(str ...interface{}) {
	for _, s := range str {
		switch x := s.(type) {
		case *C.char:
			C.free(unsafe.Pointer(x))
		case []*C.char:
			for _, cp := range x {
				C.free(unsafe.Pointer(cp))
			}
			/*
				case C.gpointer:
					C.g_free(C.gpointer(c))
			*/
		default:
			fmt.Printf("utils.go free(): Unknown type: %T\n", x)
		}

	}
}

// nextguchar increments guchar by 1. Hopefully, this could be inlined by the Go
// compiler.
func nextguchar(guchar *C.guchar) *C.guchar {
	return (*C.guchar)(unsafe.Pointer(uintptr(unsafe.Pointer(guchar)) + 1))
}

// ucharString returns a copy of the given guchar pointer. The pointer guchar
// array is assumed to have valid UTF-8.
func ucharString(guchar *C.guchar) string {
	// Seek and find the string length.
	var strlen int
	for ptr := guchar; *ptr != 0; ptr = nextguchar(ptr) {
		strlen++
	}

	// Array of unsigned char means GoString is unavailable, so maybe this is
	// fine.
	var data []byte
	sliceHeader := (*reflect.SliceHeader)(unsafe.Pointer(&data))
	sliceHeader.Len = strlen
	sliceHeader.Cap = strlen
	sliceHeader.Data = uintptr(unsafe.Pointer(guchar))

	// Return a copy of the string.
	return string(data)
}

// nextgcharptr increments gcharptr by 1. Hopefully, this could be inlined by
// the Go compiler.
func nextgcharptr(gcharptr **C.gchar) **C.gchar {
	return (**C.gchar)(unsafe.Pointer(uintptr(unsafe.Pointer(gcharptr)) + 1))
}

func goString(cstr *C.gchar) string {
	return C.GoString((*C.char)(cstr))
}

// same implementation as package glib
func toGoStringArray(c **C.gchar) []string {
	if c == nil {
		return nil
	}

	// free when done
	defer C.g_strfreev(c)

	strsLen := 0
	for scan := c; *scan != nil; scan = nextgcharptr(scan) {
		strsLen++
	}

	strs := make([]string, strsLen)
	for i := range strs {
		strs[i] = C.GoString((*C.char)(*c))
		c = nextgcharptr(c)
	}

	return strs
}

// Wrapper function for TestBoolConvs since cgo can't be used with
// testing package
func testBoolConvs() error {
	b := gobool(gbool(true))
	if b != true {
		return errors.New("Unexpected bool conversion result")
	}

	cb := gbool(gobool(C.gboolean(0)))
	if cb != C.gboolean(0) {
		return errors.New("Unexpected bool conversion result")
	}

	return nil
}

/*
 * Unexported vars
 */

var nilPtrErr = errors.New("cgo returned unexpected nil pointer")

/*
 * Constants
 */

// Align is a representation of GTK's GtkAlign.
type Align int

const (
	ALIGN_FILL   Align = C.GTK_ALIGN_FILL
	ALIGN_START  Align = C.GTK_ALIGN_START
	ALIGN_END    Align = C.GTK_ALIGN_END
	ALIGN_CENTER Align = C.GTK_ALIGN_CENTER
)

func marshalAlign(p uintptr) (interface{}, error) {
	c := C.g_value_get_enum((*C.GValue)(unsafe.Pointer(p)))
	return Align(c), nil
}

// ArrowPlacement is a representation of GTK's GtkArrowPlacement.
type ArrowPlacement int

const (
	ARROWS_BOTH  ArrowPlacement = C.GTK_ARROWS_BOTH
	ARROWS_START ArrowPlacement = C.GTK_ARROWS_START
	ARROWS_END   ArrowPlacement = C.GTK_ARROWS_END
)

func marshalArrowPlacement(p uintptr) (interface{}, error) {
	c := C.g_value_get_enum((*C.GValue)(unsafe.Pointer(p)))
	return ArrowPlacement(c), nil
}

// ArrowType is a representation of GTK's GtkArrowType.
type ArrowType int

const (
	ARROW_UP    ArrowType = C.GTK_ARROW_UP
	ARROW_DOWN  ArrowType = C.GTK_ARROW_DOWN
	ARROW_LEFT  ArrowType = C.GTK_ARROW_LEFT
	ARROW_RIGHT ArrowType = C.GTK_ARROW_RIGHT
	ARROW_NONE  ArrowType = C.GTK_ARROW_NONE
)

func marshalArrowType(p uintptr) (interface{}, error) {
	c := C.g_value_get_enum((*C.GValue)(unsafe.Pointer(p)))
	return ArrowType(c), nil
}

// AssistantPageType is a representation of GTK's GtkAssistantPageType.
type AssistantPageType int

const (
	ASSISTANT_PAGE_CONTENT  AssistantPageType = C.GTK_ASSISTANT_PAGE_CONTENT
	ASSISTANT_PAGE_INTRO    AssistantPageType = C.GTK_ASSISTANT_PAGE_INTRO
	ASSISTANT_PAGE_CONFIRM  AssistantPageType = C.GTK_ASSISTANT_PAGE_CONFIRM
	ASSISTANT_PAGE_SUMMARY  AssistantPageType = C.GTK_ASSISTANT_PAGE_SUMMARY
	ASSISTANT_PAGE_PROGRESS AssistantPageType = C.GTK_ASSISTANT_PAGE_PROGRESS
	ASSISTANT_PAGE_CUSTOM   AssistantPageType = C.GTK_ASSISTANT_PAGE_CUSTOM
)

func marshalAssistantPageType(p uintptr) (interface{}, error) {
	c := C.g_value_get_enum((*C.GValue)(unsafe.Pointer(p)))
	return AssistantPageType(c), nil
}

// ButtonsType is a representation of GTK's GtkButtonsType.
type ButtonsType int

const (
	BUTTONS_NONE      ButtonsType = C.GTK_BUTTONS_NONE
	BUTTONS_OK        ButtonsType = C.GTK_BUTTONS_OK
	BUTTONS_CLOSE     ButtonsType = C.GTK_BUTTONS_CLOSE
	BUTTONS_CANCEL    ButtonsType = C.GTK_BUTTONS_CANCEL
	BUTTONS_YES_NO    ButtonsType = C.GTK_BUTTONS_YES_NO
	BUTTONS_OK_CANCEL ButtonsType = C.GTK_BUTTONS_OK_CANCEL
)

func marshalButtonsType(p uintptr) (interface{}, error) {
	c := C.g_value_get_enum((*C.GValue)(unsafe.Pointer(p)))
	return ButtonsType(c), nil
}

// SensitivityType is a representation of GTK's GtkSensitivityType
type SensitivityType int

const (
	SENSITIVITY_AUTO SensitivityType = C.GTK_SENSITIVITY_AUTO
	SENSITIVITY_ON   SensitivityType = C.GTK_SENSITIVITY_ON
	SENSITIVITY_OFF  SensitivityType = C.GTK_SENSITIVITY_OFF
)

func marshalSensitivityType(p uintptr) (interface{}, error) {
	c := C.g_value_get_enum((*C.GValue)(unsafe.Pointer(p)))
	return SensitivityType(c), nil
}

// CalendarDisplayOptions is a representation of GTK's GtkCalendarDisplayOptions
type CalendarDisplayOptions int

const (
	CALENDAR_SHOW_HEADING      CalendarDisplayOptions = C.GTK_CALENDAR_SHOW_HEADING
	CALENDAR_SHOW_DAY_NAMES    CalendarDisplayOptions = C.GTK_CALENDAR_SHOW_DAY_NAMES
	CALENDAR_NO_MONTH_CHANGE   CalendarDisplayOptions = C.GTK_CALENDAR_NO_MONTH_CHANGE
	CALENDAR_SHOW_WEEK_NUMBERS CalendarDisplayOptions = C.GTK_CALENDAR_SHOW_WEEK_NUMBERS
	CALENDAR_SHOW_DETAILS      CalendarDisplayOptions = C.GTK_CALENDAR_SHOW_DETAILS
)

func marshalCalendarDisplayOptions(p uintptr) (interface{}, error) {
	c := C.g_value_get_enum((*C.GValue)(unsafe.Pointer(p)))
	return CalendarDisplayOptions(c), nil
}

// DestDefaults is a representation of GTK's GtkDestDefaults.
type DestDefaults int

const (
	DEST_DEFAULT_MOTION    DestDefaults = C.GTK_DEST_DEFAULT_MOTION
	DEST_DEFAULT_HIGHLIGHT DestDefaults = C.GTK_DEST_DEFAULT_HIGHLIGHT
	DEST_DEFAULT_DROP      DestDefaults = C.GTK_DEST_DEFAULT_DROP
	DEST_DEFAULT_ALL       DestDefaults = C.GTK_DEST_DEFAULT_ALL
)

func marshalDestDefaults(p uintptr) (interface{}, error) {
	c := C.g_value_get_enum((*C.GValue)(unsafe.Pointer(p)))
	return DestDefaults(c), nil
}

// DialogFlags is a representation of GTK's GtkDialogFlags.
type DialogFlags int

const (
	DIALOG_MODAL               DialogFlags = C.GTK_DIALOG_MODAL
	DIALOG_DESTROY_WITH_PARENT DialogFlags = C.GTK_DIALOG_DESTROY_WITH_PARENT
)

func marshalDialogFlags(p uintptr) (interface{}, error) {
	c := C.g_value_get_enum((*C.GValue)(unsafe.Pointer(p)))
	return DialogFlags(c), nil
}

// EntryIconPosition is a representation of GTK's GtkEntryIconPosition.
type EntryIconPosition int

const (
	ENTRY_ICON_PRIMARY   EntryIconPosition = C.GTK_ENTRY_ICON_PRIMARY
	ENTRY_ICON_SECONDARY EntryIconPosition = C.GTK_ENTRY_ICON_SECONDARY
)

func marshalEntryIconPosition(p uintptr) (interface{}, error) {
	c := C.g_value_get_enum((*C.GValue)(unsafe.Pointer(p)))
	return EntryIconPosition(c), nil
}

// FileChooserAction is a representation of GTK's GtkFileChooserAction.
type FileChooserAction int

const (
	FILE_CHOOSER_ACTION_OPEN          FileChooserAction = C.GTK_FILE_CHOOSER_ACTION_OPEN
	FILE_CHOOSER_ACTION_SAVE          FileChooserAction = C.GTK_FILE_CHOOSER_ACTION_SAVE
	FILE_CHOOSER_ACTION_SELECT_FOLDER FileChooserAction = C.GTK_FILE_CHOOSER_ACTION_SELECT_FOLDER
	FILE_CHOOSER_ACTION_CREATE_FOLDER FileChooserAction = C.GTK_FILE_CHOOSER_ACTION_CREATE_FOLDER
)

func marshalFileChooserAction(p uintptr) (interface{}, error) {
	c := C.g_value_get_enum((*C.GValue)(unsafe.Pointer(p)))
	return FileChooserAction(c), nil
}

// IconLookupFlags is a representation of GTK's GtkIconLookupFlags.
type IconLookupFlags int

const (
	ICON_LOOKUP_NO_SVG           IconLookupFlags = C.GTK_ICON_LOOKUP_NO_SVG
	ICON_LOOKUP_FORCE_SVG        IconLookupFlags = C.GTK_ICON_LOOKUP_FORCE_SVG
	ICON_LOOKUP_USE_BUILTIN      IconLookupFlags = C.GTK_ICON_LOOKUP_USE_BUILTIN
	ICON_LOOKUP_GENERIC_FALLBACK IconLookupFlags = C.GTK_ICON_LOOKUP_GENERIC_FALLBACK
	ICON_LOOKUP_FORCE_SIZE       IconLookupFlags = C.GTK_ICON_LOOKUP_FORCE_SIZE
)

func marshalIconLookupFlags(p uintptr) (interface{}, error) {
	c := C.g_value_get_enum((*C.GValue)(unsafe.Pointer(p)))
	return IconLookupFlags(c), nil
}

// IconSize is a representation of GTK's GtkIconSize.
type IconSize int

const (
	ICON_SIZE_INVALID       IconSize = C.GTK_ICON_SIZE_INVALID
	ICON_SIZE_MENU          IconSize = C.GTK_ICON_SIZE_MENU
	ICON_SIZE_SMALL_TOOLBAR IconSize = C.GTK_ICON_SIZE_SMALL_TOOLBAR
	ICON_SIZE_LARGE_TOOLBAR IconSize = C.GTK_ICON_SIZE_LARGE_TOOLBAR
	ICON_SIZE_BUTTON        IconSize = C.GTK_ICON_SIZE_BUTTON
	ICON_SIZE_DND           IconSize = C.GTK_ICON_SIZE_DND
	ICON_SIZE_DIALOG        IconSize = C.GTK_ICON_SIZE_DIALOG
)

func marshalIconSize(p uintptr) (interface{}, error) {
	c := C.g_value_get_enum((*C.GValue)(unsafe.Pointer(p)))
	return IconSize(c), nil
}

// ImageType is a representation of GTK's GtkImageType.
type ImageType int

const (
	IMAGE_EMPTY     ImageType = C.GTK_IMAGE_EMPTY
	IMAGE_PIXBUF    ImageType = C.GTK_IMAGE_PIXBUF
	IMAGE_STOCK     ImageType = C.GTK_IMAGE_STOCK
	IMAGE_ICON_SET  ImageType = C.GTK_IMAGE_ICON_SET
	IMAGE_ANIMATION ImageType = C.GTK_IMAGE_ANIMATION
	IMAGE_ICON_NAME ImageType = C.GTK_IMAGE_ICON_NAME
	IMAGE_GICON     ImageType = C.GTK_IMAGE_GICON
)

// TODO: add GTK_IMAGE_SURFACE for GTK 3.10

func marshalImageType(p uintptr) (interface{}, error) {
	c := C.g_value_get_enum((*C.GValue)(unsafe.Pointer(p)))
	return ImageType(c), nil
}

// InputHints is a representation of GTK's GtkInputHints.
type InputHints int

const (
	INPUT_HINT_NONE                InputHints = C.GTK_INPUT_HINT_NONE
	INPUT_HINT_SPELLCHECK          InputHints = C.GTK_INPUT_HINT_SPELLCHECK
	INPUT_HINT_NO_SPELLCHECK       InputHints = C.GTK_INPUT_HINT_NO_SPELLCHECK
	INPUT_HINT_WORD_COMPLETION     InputHints = C.GTK_INPUT_HINT_WORD_COMPLETION
	INPUT_HINT_LOWERCASE           InputHints = C.GTK_INPUT_HINT_LOWERCASE
	INPUT_HINT_UPPERCASE_CHARS     InputHints = C.GTK_INPUT_HINT_UPPERCASE_CHARS
	INPUT_HINT_UPPERCASE_WORDS     InputHints = C.GTK_INPUT_HINT_UPPERCASE_WORDS
	INPUT_HINT_UPPERCASE_SENTENCES InputHints = C.GTK_INPUT_HINT_UPPERCASE_SENTENCES
	INPUT_HINT_INHIBIT_OSK         InputHints = C.GTK_INPUT_HINT_INHIBIT_OSK
)

// TODO:
// GTK_INPUT_HINT_VERTICAL_WRITING Since 3.18
// GTK_INPUT_HINT_EMOJI Since 3.22.20
// GTK_INPUT_HINT_NO_EMOJI Since 3.22.20

func marshalInputHints(p uintptr) (interface{}, error) {
	c := C.g_value_get_enum((*C.GValue)(unsafe.Pointer(p)))
	return InputHints(c), nil
}

// InputPurpose is a representation of GTK's GtkInputPurpose.
type InputPurpose int

const (
	INPUT_PURPOSE_FREE_FORM InputPurpose = C.GTK_INPUT_PURPOSE_FREE_FORM
	INPUT_PURPOSE_ALPHA     InputPurpose = C.GTK_INPUT_PURPOSE_ALPHA
	INPUT_PURPOSE_DIGITS    InputPurpose = C.GTK_INPUT_PURPOSE_DIGITS
	INPUT_PURPOSE_NUMBER    InputPurpose = C.GTK_INPUT_PURPOSE_NUMBER
	INPUT_PURPOSE_PHONE     InputPurpose = C.GTK_INPUT_PURPOSE_PHONE
	INPUT_PURPOSE_URL       InputPurpose = C.GTK_INPUT_PURPOSE_URL
	INPUT_PURPOSE_EMAIL     InputPurpose = C.GTK_INPUT_PURPOSE_EMAIL
	INPUT_PURPOSE_NAME      InputPurpose = C.GTK_INPUT_PURPOSE_NAME
	INPUT_PURPOSE_PASSWORD  InputPurpose = C.GTK_INPUT_PURPOSE_PASSWORD
	INPUT_PURPOSE_PIN       InputPurpose = C.GTK_INPUT_PURPOSE_PIN
)

func marshalInputPurpose(p uintptr) (interface{}, error) {
	c := C.g_value_get_enum((*C.GValue)(unsafe.Pointer(p)))
	return InputPurpose(c), nil
}

// TODO:
// GtkBaselinePosition
// GtkDeleteType

// DirectionType is a representation of GTK's GtkDirectionType.
type DirectionType int

const (
	DIR_TAB_FORWARD  DirectionType = C.GTK_DIR_TAB_FORWARD
	DIR_TAB_BACKWARD DirectionType = C.GTK_DIR_TAB_BACKWARD
	DIR_UP           DirectionType = C.GTK_DIR_UP
	DIR_DOWN         DirectionType = C.GTK_DIR_DOWN
	DIR_LEFT         DirectionType = C.GTK_DIR_LEFT
	DIR_RIGHT        DirectionType = C.GTK_DIR_RIGHT
)

func marshalDirectionType(p uintptr) (interface{}, error) {
	c := C.g_value_get_enum((*C.GValue)(unsafe.Pointer(p)))
	return DirectionType(c), nil
}

// Justification is a representation of GTK's GtkJustification.
type Justification int

const (
	JUSTIFY_LEFT   Justification = C.GTK_JUSTIFY_LEFT
	JUSTIFY_RIGHT  Justification = C.GTK_JUSTIFY_RIGHT
	JUSTIFY_CENTER Justification = C.GTK_JUSTIFY_CENTER
	JUSTIFY_FILL   Justification = C.GTK_JUSTIFY_FILL
)

func marshalJustification(p uintptr) (interface{}, error) {
	c := C.g_value_get_enum((*C.GValue)(unsafe.Pointer(p)))
	return Justification(c), nil
}

// License is a representation of GTK's GtkLicense.
type License int

const (
	LICENSE_UNKNOWN      License = C.GTK_LICENSE_UNKNOWN
	LICENSE_CUSTOM       License = C.GTK_LICENSE_CUSTOM
	LICENSE_GPL_2_0      License = C.GTK_LICENSE_GPL_2_0
	LICENSE_GPL_3_0      License = C.GTK_LICENSE_GPL_3_0
	LICENSE_LGPL_2_1     License = C.GTK_LICENSE_LGPL_2_1
	LICENSE_LGPL_3_0     License = C.GTK_LICENSE_LGPL_3_0
	LICENSE_BSD          License = C.GTK_LICENSE_BSD
	LICENSE_MIT_X11      License = C.GTK_LICENSE_MIT_X11
	LICENSE_GTK_ARTISTIC License = C.GTK_LICENSE_ARTISTIC
)

func marshalLicense(p uintptr) (interface{}, error) {
	c := C.g_value_get_enum((*C.GValue)(unsafe.Pointer(p)))
	return License(c), nil
}

// MessageType is a representation of GTK's GtkMessageType.
type MessageType int

const (
	MESSAGE_INFO     MessageType = C.GTK_MESSAGE_INFO
	MESSAGE_WARNING  MessageType = C.GTK_MESSAGE_WARNING
	MESSAGE_QUESTION MessageType = C.GTK_MESSAGE_QUESTION
	MESSAGE_ERROR    MessageType = C.GTK_MESSAGE_ERROR
	MESSAGE_OTHER    MessageType = C.GTK_MESSAGE_OTHER
)

func marshalMessageType(p uintptr) (interface{}, error) {
	c := C.g_value_get_enum((*C.GValue)(unsafe.Pointer(p)))
	return MessageType(c), nil
}

// TODO:
// GtkMovementStep

// Orientation is a representation of GTK's GtkOrientation.
type Orientation int

const (
	ORIENTATION_HORIZONTAL Orientation = C.GTK_ORIENTATION_HORIZONTAL
	ORIENTATION_VERTICAL   Orientation = C.GTK_ORIENTATION_VERTICAL
)

func marshalOrientation(p uintptr) (interface{}, error) {
	c := C.g_value_get_enum((*C.GValue)(unsafe.Pointer(p)))
	return Orientation(c), nil
}

// PackType is a representation of GTK's GtkPackType.
type PackType int

const (
	PACK_START PackType = C.GTK_PACK_START
	PACK_END   PackType = C.GTK_PACK_END
)

func marshalPackType(p uintptr) (interface{}, error) {
	c := C.g_value_get_enum((*C.GValue)(unsafe.Pointer(p)))
	return PackType(c), nil
}

// PathType is a representation of GTK's GtkPathType.
type PathType int

const (
	PATH_WIDGET       PathType = C.GTK_PATH_WIDGET
	PATH_WIDGET_CLASS PathType = C.GTK_PATH_WIDGET_CLASS
	PATH_CLASS        PathType = C.GTK_PATH_CLASS
)

func marshalPathType(p uintptr) (interface{}, error) {
	c := C.g_value_get_enum((*C.GValue)(unsafe.Pointer(p)))
	return PathType(c), nil
}

// PolicyType is a representation of GTK's GtkPolicyType.
type PolicyType int

const (
	POLICY_ALWAYS    PolicyType = C.GTK_POLICY_ALWAYS
	POLICY_AUTOMATIC PolicyType = C.GTK_POLICY_AUTOMATIC
	POLICY_NEVER     PolicyType = C.GTK_POLICY_NEVER
)

func marshalPolicyType(p uintptr) (interface{}, error) {
	c := C.g_value_get_enum((*C.GValue)(unsafe.Pointer(p)))
	return PolicyType(c), nil
}

// SpinButtonUpdatePolicy is a representation of GTK's GtkSpinButtonUpdatePolicy.
type SpinButtonUpdatePolicy int

const (
	UPDATE_ALWAYS   SpinButtonUpdatePolicy = C.GTK_UPDATE_ALWAYS
	UPDATE_IF_VALID SpinButtonUpdatePolicy = C.GTK_UPDATE_IF_VALID
)

func marshalSpinButtonUpdatePolicy(p uintptr) (interface{}, error) {
	c := C.g_value_get_enum((*C.GValue)(unsafe.Pointer(p)))
	return SpinButtonUpdatePolicy(c), nil
}

// SpinType is a representation of GTK's GtkSpinType.
type SpinType int

const (
	SPIN_STEP_FORWARD  SpinType = C.GTK_SPIN_STEP_FORWARD
	SPIN_STEP_BACKWARD SpinType = C.GTK_SPIN_STEP_BACKWARD
	SPIN_PAGE_BACKWARD SpinType = C.GTK_SPIN_PAGE_BACKWARD
	SPIN_HOME          SpinType = C.GTK_SPIN_HOME
	SPIN_END           SpinType = C.GTK_SPIN_END
	SPIN_USER_DEFINED  SpinType = C.GTK_SPIN_USER_DEFINED
)

func marshalSpinType(p uintptr) (interface{}, error) {
	c := C.g_value_get_enum((*C.GValue)(unsafe.Pointer(p)))
	return SpinType(c), nil
}

// TreeViewGridLine is a representation of GTK's GtkTreeViewGridLines.
type TreeViewGridLines int

const (
	TREE_VIEW_GRID_LINES_NONE       TreeViewGridLines = C.GTK_TREE_VIEW_GRID_LINES_NONE
	TREE_VIEW_GRID_LINES_HORIZONTAL TreeViewGridLines = C.GTK_TREE_VIEW_GRID_LINES_HORIZONTAL
	TREE_VIEW_GRID_LINES_VERTICAL   TreeViewGridLines = C.GTK_TREE_VIEW_GRID_LINES_VERTICAL
	TREE_VIEW_GRID_LINES_BOTH       TreeViewGridLines = C.GTK_TREE_VIEW_GRID_LINES_BOTH
)

// CellRendererAccelMode is a representation of GtkCellRendererAccelMode
type CellRendererAccelMode int

const (
	// CELL_RENDERER_ACCEL_MODE_GTK is documented as GTK+ accelerators mode
	CELL_RENDERER_ACCEL_MODE_GTK CellRendererAccelMode = C.GTK_CELL_RENDERER_ACCEL_MODE_GTK
	// CELL_RENDERER_ACCEL_MODE_OTHER is documented as Other accelerator mode
	CELL_RENDERER_ACCEL_MODE_OTHER CellRendererAccelMode = C.GTK_CELL_RENDERER_ACCEL_MODE_OTHER
)

func marshalCellRendererAccelMode(p uintptr) (interface{}, error) {
	c := C.g_value_get_enum((*C.GValue)(unsafe.Pointer(p)))
	return CellRendererAccelMode(c), nil
}

// CellRendererState is a representation of GTK's GtkCellRendererState
type CellRendererState int

const (
	CELL_RENDERER_SELECTED    CellRendererState = C.GTK_CELL_RENDERER_SELECTED
	CELL_RENDERER_PRELIT      CellRendererState = C.GTK_CELL_RENDERER_PRELIT
	CELL_RENDERER_INSENSITIVE CellRendererState = C.GTK_CELL_RENDERER_INSENSITIVE
	CELL_RENDERER_SORTED      CellRendererState = C.GTK_CELL_RENDERER_SORTED
	CELL_RENDERER_FOCUSED     CellRendererState = C.GTK_CELL_RENDERER_FOCUSED
	CELL_RENDERER_EXPANDABLE  CellRendererState = C.GTK_CELL_RENDERER_EXPANDABLE // since 3.4
	CELL_RENDERER_EXPANDED    CellRendererState = C.GTK_CELL_RENDERER_EXPANDED   // since 3.4
)

func marshalCellRendererState(p uintptr) (interface{}, error) {
	c := C.g_value_get_enum((*C.GValue)(unsafe.Pointer(p)))
	return CellRendererState(c), nil
}

// CellRendererMode is a representation of GTK's GtkCellRendererMode
type CellRendererMode int

const (
	CELL_RENDERER_MODE_INERT       CellRendererMode = C.GTK_CELL_RENDERER_MODE_INERT
	CELL_RENDERER_MODE_ACTIVATABLE CellRendererMode = C.GTK_CELL_RENDERER_MODE_ACTIVATABLE
	CELL_RENDERER_MODE_EDITABLE    CellRendererMode = C.GTK_CELL_RENDERER_MODE_EDITABLE
)

func marshalCellRendererMode(p uintptr) (interface{}, error) {
	c := C.g_value_get_enum((*C.GValue)(unsafe.Pointer(p)))
	return CellRendererMode(c), nil
}

// PositionType is a representation of GTK's GtkPositionType.
type PositionType int

const (
	POS_LEFT   PositionType = C.GTK_POS_LEFT
	POS_RIGHT  PositionType = C.GTK_POS_RIGHT
	POS_TOP    PositionType = C.GTK_POS_TOP
	POS_BOTTOM PositionType = C.GTK_POS_BOTTOM
)

func marshalPositionType(p uintptr) (interface{}, error) {
	c := C.g_value_get_enum((*C.GValue)(unsafe.Pointer(p)))
	return PositionType(c), nil
}

// ReliefStyle is a representation of GTK's GtkReliefStyle.
type ReliefStyle int

const (
	RELIEF_NORMAL ReliefStyle = C.GTK_RELIEF_NORMAL
	RELIEF_HALF   ReliefStyle = C.GTK_RELIEF_HALF
	RELIEF_NONE   ReliefStyle = C.GTK_RELIEF_NONE
)

func marshalReliefStyle(p uintptr) (interface{}, error) {
	c := C.g_value_get_enum((*C.GValue)(unsafe.Pointer(p)))
	return ReliefStyle(c), nil
}

// ResponseType is a representation of GTK's GtkResponseType.
type ResponseType int

const (
	RESPONSE_NONE         ResponseType = C.GTK_RESPONSE_NONE
	RESPONSE_REJECT       ResponseType = C.GTK_RESPONSE_REJECT
	RESPONSE_ACCEPT       ResponseType = C.GTK_RESPONSE_ACCEPT
	RESPONSE_DELETE_EVENT ResponseType = C.GTK_RESPONSE_DELETE_EVENT
	RESPONSE_OK           ResponseType = C.GTK_RESPONSE_OK
	RESPONSE_CANCEL       ResponseType = C.GTK_RESPONSE_CANCEL
	RESPONSE_CLOSE        ResponseType = C.GTK_RESPONSE_CLOSE
	RESPONSE_YES          ResponseType = C.GTK_RESPONSE_YES
	RESPONSE_NO           ResponseType = C.GTK_RESPONSE_NO
	RESPONSE_APPLY        ResponseType = C.GTK_RESPONSE_APPLY
	RESPONSE_HELP         ResponseType = C.GTK_RESPONSE_HELP
)

func marshalResponseType(p uintptr) (interface{}, error) {
	c := C.g_value_get_enum((*C.GValue)(unsafe.Pointer(p)))
	return ResponseType(c), nil
}

// ScrollType is a representation of GTK's GtkScrollType.
type ScrollType int

const (
	SCROLL_NONE          ScrollType = C.GTK_SCROLL_NONE
	SCROLL_JUMP          ScrollType = C.GTK_SCROLL_JUMP
	SCROLL_STEP_BACKWARD ScrollType = C.GTK_SCROLL_STEP_BACKWARD
	SCROLL_STEP_FORWARD  ScrollType = C.GTK_SCROLL_STEP_FORWARD
	SCROLL_PAGE_BACKWARD ScrollType = C.GTK_SCROLL_PAGE_BACKWARD
	SCROLL_PAGE_FORWARD  ScrollType = C.GTK_SCROLL_PAGE_FORWARD
	SCROLL_STEP_UP       ScrollType = C.GTK_SCROLL_STEP_UP
	SCROLL_STEP_DOWN     ScrollType = C.GTK_SCROLL_STEP_DOWN
	SCROLL_PAGE_UP       ScrollType = C.GTK_SCROLL_PAGE_UP
	SCROLL_PAGE_DOWN     ScrollType = C.GTK_SCROLL_PAGE_DOWN
	SCROLL_STEP_LEFT     ScrollType = C.GTK_SCROLL_STEP_LEFT
	SCROLL_STEP_RIGHT    ScrollType = C.GTK_SCROLL_STEP_RIGHT
	SCROLL_PAGE_LEFT     ScrollType = C.GTK_SCROLL_PAGE_LEFT
	SCROLL_PAGE_RIGHT    ScrollType = C.GTK_SCROLL_PAGE_RIGHT
	SCROLL_START         ScrollType = C.GTK_SCROLL_START
	SCROLL_END           ScrollType = C.GTK_SCROLL_END
)

func marshalScrollType(p uintptr) (interface{}, error) {
	c := C.g_value_get_enum((*C.GValue)(unsafe.Pointer(p)))
	return ScrollType(c), nil
}

// ScrollStep is a representation of GTK's GtkScrollStep.
type ScrollStep int

const (
	SCROLL_STEPS            ScrollStep = C.GTK_SCROLL_STEPS
	SCROLL_PAGES            ScrollStep = C.GTK_SCROLL_PAGES
	SCROLL_ENDS             ScrollStep = C.GTK_SCROLL_ENDS
	SCROLL_HORIZONTAL_STEPS ScrollStep = C.GTK_SCROLL_HORIZONTAL_STEPS
	SCROLL_HORIZONTAL_PAGES ScrollStep = C.GTK_SCROLL_HORIZONTAL_PAGES
	SCROLL_HORIZONTAL_ENDS  ScrollStep = C.GTK_SCROLL_HORIZONTAL_ENDS
)

func marshalScrollStep(p uintptr) (interface{}, error) {
	c := C.g_value_get_enum((*C.GValue)(unsafe.Pointer(p)))
	return ScrollStep(c), nil
}

// SelectionMode is a representation of GTK's GtkSelectionMode.
type SelectionMode int

const (
	SELECTION_NONE     SelectionMode = C.GTK_SELECTION_NONE
	SELECTION_SINGLE   SelectionMode = C.GTK_SELECTION_SINGLE
	SELECTION_BROWSE   SelectionMode = C.GTK_SELECTION_BROWSE
	SELECTION_MULTIPLE SelectionMode = C.GTK_SELECTION_MULTIPLE
)

func marshalSelectionMode(p uintptr) (interface{}, error) {
	c := C.g_value_get_enum((*C.GValue)(unsafe.Pointer(p)))
	return SelectionMode(c), nil
}

// ShadowType is a representation of GTK's GtkShadowType.
type ShadowType int

const (
	SHADOW_NONE       ShadowType = C.GTK_SHADOW_NONE
	SHADOW_IN         ShadowType = C.GTK_SHADOW_IN
	SHADOW_OUT        ShadowType = C.GTK_SHADOW_OUT
	SHADOW_ETCHED_IN  ShadowType = C.GTK_SHADOW_ETCHED_IN
	SHADOW_ETCHED_OUT ShadowType = C.GTK_SHADOW_ETCHED_OUT
)

func marshalShadowType(p uintptr) (interface{}, error) {
	c := C.g_value_get_enum((*C.GValue)(unsafe.Pointer(p)))
	return ShadowType(c), nil
}

// SizeGroupMode is a representation of GTK's GtkSizeGroupMode
type SizeGroupMode int

const (
	SIZE_GROUP_NONE       SizeGroupMode = C.GTK_SIZE_GROUP_NONE
	SIZE_GROUP_HORIZONTAL SizeGroupMode = C.GTK_SIZE_GROUP_HORIZONTAL
	SIZE_GROUP_VERTICAL   SizeGroupMode = C.GTK_SIZE_GROUP_VERTICAL
	SIZE_GROUP_BOTH       SizeGroupMode = C.GTK_SIZE_GROUP_BOTH
)

func marshalSizeGroupMode(p uintptr) (interface{}, error) {
	c := C.g_value_get_enum((*C.GValue)(unsafe.Pointer(p)))
	return SizeGroupMode(c), nil
}

// SortType is a representation of GTK's GtkSortType.
type SortType int

const (
	SORT_ASCENDING  SortType = C.GTK_SORT_ASCENDING
	SORT_DESCENDING          = C.GTK_SORT_DESCENDING
)

// Use as column id in SetSortColumnId to specify ListStore sorted
// by default column or unsorted
const (
	SORT_COLUMN_DEFAULT  int = -1
	SORT_COLUMN_UNSORTED int = -2
)

func marshalSortType(p uintptr) (interface{}, error) {
	c := C.g_value_get_enum((*C.GValue)(unsafe.Pointer(p)))
	return SortType(c), nil
}

// StateFlags is a representation of GTK's GtkStateFlags.
type StateFlags int

const (
	STATE_FLAG_NORMAL       StateFlags = C.GTK_STATE_FLAG_NORMAL
	STATE_FLAG_ACTIVE       StateFlags = C.GTK_STATE_FLAG_ACTIVE
	STATE_FLAG_PRELIGHT     StateFlags = C.GTK_STATE_FLAG_PRELIGHT
	STATE_FLAG_SELECTED     StateFlags = C.GTK_STATE_FLAG_SELECTED
	STATE_FLAG_INSENSITIVE  StateFlags = C.GTK_STATE_FLAG_INSENSITIVE
	STATE_FLAG_INCONSISTENT StateFlags = C.GTK_STATE_FLAG_INCONSISTENT
	STATE_FLAG_FOCUSED      StateFlags = C.GTK_STATE_FLAG_FOCUSED
	STATE_FLAG_BACKDROP     StateFlags = C.GTK_STATE_FLAG_BACKDROP
)

func marshalStateFlags(p uintptr) (interface{}, error) {
	c := C.g_value_get_enum((*C.GValue)(unsafe.Pointer(p)))
	return StateFlags(c), nil
}

// TextDirection is a representation of GTK's GtkTextDirection.
type TextDirection int

const (
	TEXT_DIR_NONE TextDirection = C.GTK_TEXT_DIR_NONE
	TEXT_DIR_LTR  TextDirection = C.GTK_TEXT_DIR_LTR
	TEXT_DIR_RTL  TextDirection = C.GTK_TEXT_DIR_RTL
)

func marshalTextDirection(p uintptr) (interface{}, error) {
	c := C.g_value_get_enum((*C.GValue)(unsafe.Pointer(p)))
	return TextDirection(c), nil
}

// TargetFlags is a representation of GTK's GtkTargetFlags.
type TargetFlags int

const (
	TARGET_SAME_APP     TargetFlags = C.GTK_TARGET_SAME_APP
	TARGET_SAME_WIDGET  TargetFlags = C.GTK_TARGET_SAME_WIDGET
	TARGET_OTHER_APP    TargetFlags = C.GTK_TARGET_OTHER_APP
	TARGET_OTHER_WIDGET TargetFlags = C.GTK_TARGET_OTHER_WIDGET
)

func marshalTargetFlags(p uintptr) (interface{}, error) {
	c := C.g_value_get_enum((*C.GValue)(unsafe.Pointer(p)))
	return TargetFlags(c), nil
}

// ToolbarStyle is a representation of GTK's GtkToolbarStyle.
type ToolbarStyle int

const (
	TOOLBAR_ICONS      ToolbarStyle = C.GTK_TOOLBAR_ICONS
	TOOLBAR_TEXT       ToolbarStyle = C.GTK_TOOLBAR_TEXT
	TOOLBAR_BOTH       ToolbarStyle = C.GTK_TOOLBAR_BOTH
	TOOLBAR_BOTH_HORIZ ToolbarStyle = C.GTK_TOOLBAR_BOTH_HORIZ
)

func marshalToolbarStyle(p uintptr) (interface{}, error) {
	c := C.g_value_get_enum((*C.GValue)(unsafe.Pointer(p)))
	return ToolbarStyle(c), nil
}

// TreeModelFlags is a representation of GTK's GtkTreeModelFlags.
type TreeModelFlags int

const (
	TREE_MODEL_ITERS_PERSIST TreeModelFlags = C.GTK_TREE_MODEL_ITERS_PERSIST
	TREE_MODEL_LIST_ONLY     TreeModelFlags = C.GTK_TREE_MODEL_LIST_ONLY
)

func marshalTreeModelFlags(p uintptr) (interface{}, error) {
	c := C.g_value_get_enum((*C.GValue)(unsafe.Pointer(p)))
	return TreeModelFlags(c), nil
}

// WindowPosition is a representation of GTK's GtkWindowPosition.
type WindowPosition int

const (
	WIN_POS_NONE             WindowPosition = C.GTK_WIN_POS_NONE
	WIN_POS_CENTER           WindowPosition = C.GTK_WIN_POS_CENTER
	WIN_POS_MOUSE            WindowPosition = C.GTK_WIN_POS_MOUSE
	WIN_POS_CENTER_ALWAYS    WindowPosition = C.GTK_WIN_POS_CENTER_ALWAYS
	WIN_POS_CENTER_ON_PARENT WindowPosition = C.GTK_WIN_POS_CENTER_ON_PARENT
)

func marshalWindowPosition(p uintptr) (interface{}, error) {
	c := C.g_value_get_enum((*C.GValue)(unsafe.Pointer(p)))
	return WindowPosition(c), nil
}

// WindowType is a representation of GTK's GtkWindowType.
type WindowType int

const (
	WINDOW_TOPLEVEL WindowType = C.GTK_WINDOW_TOPLEVEL
	WINDOW_POPUP    WindowType = C.GTK_WINDOW_POPUP
)

func marshalWindowType(p uintptr) (interface{}, error) {
	c := C.g_value_get_enum((*C.GValue)(unsafe.Pointer(p)))
	return WindowType(c), nil
}

// WrapMode is a representation of GTK's GtkWrapMode.
type WrapMode int

const (
	WRAP_NONE      WrapMode = C.GTK_WRAP_NONE
	WRAP_CHAR      WrapMode = C.GTK_WRAP_CHAR
	WRAP_WORD      WrapMode = C.GTK_WRAP_WORD
	WRAP_WORD_CHAR WrapMode = C.GTK_WRAP_WORD_CHAR
)

func marshalWrapMode(p uintptr) (interface{}, error) {
	c := C.g_value_get_enum((*C.GValue)(unsafe.Pointer(p)))
	return WrapMode(c), nil
}

// TextSearchFlags is a representation of GTK's GtkTextSearchFlags.
type TextSearchFlags int

const (
	TEXT_SEARCH_VISIBLE_ONLY     TextSearchFlags = C.GTK_TEXT_SEARCH_VISIBLE_ONLY
	TEXT_SEARCH_TEXT_ONLY        TextSearchFlags = C.GTK_TEXT_SEARCH_TEXT_ONLY
	TEXT_SEARCH_CASE_INSENSITIVE TextSearchFlags = C.GTK_TEXT_SEARCH_CASE_INSENSITIVE
)

func marshalTextSearchFlags(p uintptr) (interface{}, error) {
	c := C.g_value_get_enum((*C.GValue)(unsafe.Pointer(p)))
	return TextSearchFlags(c), nil
}

// CornerType is a representation of GTK's GtkCornerType.
type CornerType int

const (
	CORNER_TOP_LEFT     CornerType = C.GTK_CORNER_TOP_LEFT
	CORNER_BOTTOM_LEFT  CornerType = C.GTK_CORNER_BOTTOM_LEFT
	CORNER_TOP_RIGHT    CornerType = C.GTK_CORNER_TOP_RIGHT
	CORNER_BOTTOM_RIGHT CornerType = C.GTK_CORNER_BOTTOM_RIGHT
)

func marshalCornerType(p uintptr) (interface{}, error) {
	c := C.g_value_get_enum((*C.GValue)(unsafe.Pointer(p)))
	return CornerType(c), nil
}

/*
 * Init and main event loop
 */

/*
Init() is a wrapper around gtk_init() and must be called before any
other GTK calls and is used to initialize everything necessary.

In addition to setting up GTK for usage, a pointer to a slice of
strings may be passed in to parse standard GTK command line arguments.
args will be modified to remove any flags that were handled.
Alternatively, nil may be passed in to not perform any command line
parsing.
*/
func Init(args *[]string) {
	if args != nil {
		argc := C.int(len(*args))
		argv := C.make_strings(argc)
		defer C.destroy_strings(argv)

		for i, arg := range *args {
			cstr := C.CString(arg)
			C.set_string(argv, C.int(i), (*C.gchar)(cstr))
		}

		C.gtk_init((*C.int)(unsafe.Pointer(&argc)),
			(***C.char)(unsafe.Pointer(&argv)))

		unhandled := make([]string, argc)
		for i := 0; i < int(argc); i++ {
			cstr := C.get_string(argv, C.int(i))
			unhandled[i] = goString(cstr)
			C.free(unsafe.Pointer(cstr))
		}
		*args = unhandled
	} else {
		C.gtk_init(nil, nil)
	}
}

/*
InitCheck() is a wrapper around gtk_init_check() and works exactly like Init()
only that it doesn't terminate the program if initialization fails.
*/
func InitCheck(args *[]string) error {
	success := false
	if args != nil {
		argc := C.int(len(*args))
		argv := C.make_strings(argc)
		defer C.destroy_strings(argv)

		for i, arg := range *args {
			cstr := C.CString(arg)
			C.set_string(argv, C.int(i), (*C.gchar)(cstr))
		}

		success = gobool(C.gtk_init_check((*C.int)(unsafe.Pointer(&argc)),
			(***C.char)(unsafe.Pointer(&argv))))

		unhandled := make([]string, argc)
		for i := 0; i < int(argc); i++ {
			cstr := C.get_string(argv, C.int(i))
			unhandled[i] = goString(cstr)
			C.free(unsafe.Pointer(cstr))
		}
		*args = unhandled
	} else {
		success = gobool(C.gtk_init_check(nil, nil))
	}
	if success {
		return nil
	} else {
		return errors.New("Unable to initialize GTK")
	}
}

// Main() is a wrapper around gtk_main() and runs the GTK main loop,
// blocking until MainQuit() is called.
func Main() {
	C.gtk_main()
}

// MainIteration is a wrapper around gtk_main_iteration.
func MainIteration() bool {
	return gobool(C.gtk_main_iteration())
}

// MainIterationDo is a wrapper around gtk_main_iteration_do.
func MainIterationDo(blocking bool) bool {
	return gobool(C.gtk_main_iteration_do(gbool(blocking)))
}

// EventsPending is a wrapper around gtk_events_pending.
func EventsPending() bool {
	return gobool(C.gtk_events_pending())
}

// MainQuit() is a wrapper around gtk_main_quit() is used to terminate
// the GTK main loop (started by Main()).
func MainQuit() {
	C.gtk_main_quit()
}

/*
 * GtkAdjustment
 */

// Adjustment is a representation of GTK's GtkAdjustment.
type Adjustment struct {
	glib.InitiallyUnowned
}

// native returns a pointer to the underlying GtkAdjustment.
func (v *Adjustment) native() *C.GtkAdjustment {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkAdjustment(p)
}

func marshalAdjustment(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapAdjustment(obj), nil
}

func wrapAdjustment(obj *glib.Object) *Adjustment {
	if obj == nil {
		return nil
	}

	return &Adjustment{glib.InitiallyUnowned{obj}}
}

// AdjustmentNew is a wrapper around gtk_adjustment_new().
func AdjustmentNew(value, lower, upper, stepIncrement, pageIncrement, pageSize float64) (*Adjustment, error) {
	c := C.gtk_adjustment_new(C.gdouble(value),
		C.gdouble(lower),
		C.gdouble(upper),
		C.gdouble(stepIncrement),
		C.gdouble(pageIncrement),
		C.gdouble(pageSize))
	if c == nil {
		return nil, nilPtrErr
	}
	obj := glib.Take(unsafe.Pointer(c))
	return wrapAdjustment(obj), nil
}

// GetValue is a wrapper around gtk_adjustment_get_value().
func (v *Adjustment) GetValue() float64 {
	c := C.gtk_adjustment_get_value(v.native())
	return float64(c)
}

// SetValue is a wrapper around gtk_adjustment_set_value().
func (v *Adjustment) SetValue(value float64) {
	C.gtk_adjustment_set_value(v.native(), C.gdouble(value))
}

// GetLower is a wrapper around gtk_adjustment_get_lower().
func (v *Adjustment) GetLower() float64 {
	c := C.gtk_adjustment_get_lower(v.native())
	return float64(c)
}

// GetPageSize is a wrapper around gtk_adjustment_get_page_size().
func (v *Adjustment) GetPageSize() float64 {
	return float64(C.gtk_adjustment_get_page_size(v.native()))
}

// SetPageSize is a wrapper around gtk_adjustment_set_page_size().
func (v *Adjustment) SetPageSize(value float64) {
	C.gtk_adjustment_set_page_size(v.native(), C.gdouble(value))
}

// Configure is a wrapper around gtk_adjustment_configure().
func (v *Adjustment) Configure(value, lower, upper, stepIncrement, pageIncrement, pageSize float64) {
	C.gtk_adjustment_configure(v.native(), C.gdouble(value),
		C.gdouble(lower), C.gdouble(upper), C.gdouble(stepIncrement),
		C.gdouble(pageIncrement), C.gdouble(pageSize))
}

// SetLower is a wrapper around gtk_adjustment_set_lower().
func (v *Adjustment) SetLower(value float64) {
	C.gtk_adjustment_set_lower(v.native(), C.gdouble(value))
}

// GetUpper is a wrapper around gtk_adjustment_get_upper().
func (v *Adjustment) GetUpper() float64 {
	c := C.gtk_adjustment_get_upper(v.native())
	return float64(c)
}

// SetUpper is a wrapper around gtk_adjustment_set_upper().
func (v *Adjustment) SetUpper(value float64) {
	C.gtk_adjustment_set_upper(v.native(), C.gdouble(value))
}

// GetPageIncrement is a wrapper around gtk_adjustment_get_page_increment().
func (v *Adjustment) GetPageIncrement() float64 {
	c := C.gtk_adjustment_get_page_increment(v.native())
	return float64(c)
}

// SetPageIncrement is a wrapper around gtk_adjustment_set_page_increment().
func (v *Adjustment) SetPageIncrement(value float64) {
	C.gtk_adjustment_set_page_increment(v.native(), C.gdouble(value))
}

// GetStepIncrement is a wrapper around gtk_adjustment_get_step_increment().
func (v *Adjustment) GetStepIncrement() float64 {
	c := C.gtk_adjustment_get_step_increment(v.native())
	return float64(c)
}

// SetStepIncrement is a wrapper around gtk_adjustment_set_step_increment().
func (v *Adjustment) SetStepIncrement(value float64) {
	C.gtk_adjustment_set_step_increment(v.native(), C.gdouble(value))
}

// GetMinimumIncrement is a wrapper around gtk_adjustment_get_minimum_increment().
func (v *Adjustment) GetMinimumIncrement() float64 {
	c := C.gtk_adjustment_get_minimum_increment(v.native())
	return float64(c)
}

/*
void	gtk_adjustment_clamp_page ()
void	gtk_adjustment_changed ()
void	gtk_adjustment_value_changed ()
void	gtk_adjustment_configure ()
*/

/*
 * GtkAssistant
 */

// Assistant is a representation of GTK's GtkAssistant.
type Assistant struct {
	Window
}

// native returns a pointer to the underlying GtkAssistant.
func (v *Assistant) native() *C.GtkAssistant {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkAssistant(p)
}

func marshalAssistant(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapAssistant(obj), nil
}

func wrapAssistant(obj *glib.Object) *Assistant {
	if obj == nil {
		return nil
	}

	return &Assistant{Window{Bin{Container{Widget{glib.InitiallyUnowned{obj}}}}}}
}

// AssistantNew is a wrapper around gtk_assistant_new().
func AssistantNew() (*Assistant, error) {
	c := C.gtk_assistant_new()
	if c == nil {
		return nil, nilPtrErr
	}
	obj := glib.Take(unsafe.Pointer(c))
	return wrapAssistant(obj), nil
}

// GetCurrentPage is a wrapper around gtk_assistant_get_current_page().
func (v *Assistant) GetCurrentPage() int {
	c := C.gtk_assistant_get_current_page(v.native())
	return int(c)
}

// SetCurrentPage is a wrapper around gtk_assistant_set_current_page().
func (v *Assistant) SetCurrentPage(pageNum int) {
	C.gtk_assistant_set_current_page(v.native(), C.gint(pageNum))
}

// GetNPages is a wrapper around gtk_assistant_get_n_pages().
func (v *Assistant) GetNPages() int {
	c := C.gtk_assistant_get_n_pages(v.native())
	return int(c)
}

// GetNthPage is a wrapper around gtk_assistant_get_nth_page().
func (v *Assistant) GetNthPage(pageNum int) (IWidget, error) {
	c := C.gtk_assistant_get_nth_page(v.native(), C.gint(pageNum))
	if c == nil {
		return nil, fmt.Errorf("page %d is out of bounds", pageNum)
	}
	return castWidget(c)
}

// PrependPage is a wrapper around gtk_assistant_prepend_page().
func (v *Assistant) PrependPage(page IWidget) int {
	c := C.gtk_assistant_prepend_page(v.native(), page.toWidget())
	return int(c)
}

// AppendPage is a wrapper around gtk_assistant_append_page().
func (v *Assistant) AppendPage(page IWidget) int {
	c := C.gtk_assistant_append_page(v.native(), page.toWidget())
	return int(c)
}

// InsertPage is a wrapper around gtk_assistant_insert_page().
func (v *Assistant) InsertPage(page IWidget, position int) int {
	c := C.gtk_assistant_insert_page(v.native(), page.toWidget(),
		C.gint(position))
	return int(c)
}

// RemovePage is a wrapper around gtk_assistant_remove_page().
func (v *Assistant) RemovePage(pageNum int) {
	C.gtk_assistant_remove_page(v.native(), C.gint(pageNum))
}

// TODO: gtk_assistant_set_forward_page_func

// SetPageType is a wrapper around gtk_assistant_set_page_type().
func (v *Assistant) SetPageType(page IWidget, ptype AssistantPageType) {
	C.gtk_assistant_set_page_type(v.native(), page.toWidget(),
		C.GtkAssistantPageType(ptype))
}

// GetPageType is a wrapper around gtk_assistant_get_page_type().
func (v *Assistant) GetPageType(page IWidget) AssistantPageType {
	c := C.gtk_assistant_get_page_type(v.native(), page.toWidget())
	return AssistantPageType(c)
}

// SetPageTitle is a wrapper around gtk_assistant_set_page_title().
func (v *Assistant) SetPageTitle(page IWidget, title string) {
	cstr := C.CString(title)
	defer C.free(unsafe.Pointer(cstr))
	C.gtk_assistant_set_page_title(v.native(), page.toWidget(),
		(*C.gchar)(cstr))
}

// GetPageTitle is a wrapper around gtk_assistant_get_page_title().
func (v *Assistant) GetPageTitle(page IWidget) string {
	return goString(C.gtk_assistant_get_page_title(v.native(), page.toWidget()))
}

// SetPageComplete is a wrapper around gtk_assistant_set_page_complete().
func (v *Assistant) SetPageComplete(page IWidget, complete bool) {
	C.gtk_assistant_set_page_complete(v.native(), page.toWidget(),
		gbool(complete))
}

// GetPageComplete is a wrapper around gtk_assistant_get_page_complete().
func (v *Assistant) GetPageComplete(page IWidget) bool {
	c := C.gtk_assistant_get_page_complete(v.native(), page.toWidget())
	return gobool(c)
}

// AddActionWidget is a wrapper around gtk_assistant_add_action_widget().
func (v *Assistant) AddActionWidget(child IWidget) {
	C.gtk_assistant_add_action_widget(v.native(), child.toWidget())
}

// RemoveActionWidget is a wrapper around gtk_assistant_remove_action_widget().
func (v *Assistant) RemoveActionWidget(child IWidget) {
	C.gtk_assistant_remove_action_widget(v.native(), child.toWidget())
}

// UpdateButtonsState is a wrapper around gtk_assistant_update_buttons_state().
func (v *Assistant) UpdateButtonsState() {
	C.gtk_assistant_update_buttons_state(v.native())
}

// Commit is a wrapper around gtk_assistant_commit().
func (v *Assistant) Commit() {
	C.gtk_assistant_commit(v.native())
}

// NextPage is a wrapper around gtk_assistant_next_page().
func (v *Assistant) NextPage() {
	C.gtk_assistant_next_page(v.native())
}

// PreviousPage is a wrapper around gtk_assistant_previous_page().
func (v *Assistant) PreviousPage() {
	C.gtk_assistant_previous_page(v.native())
}

/*
 * GtkBin
 */

// Bin is a representation of GTK's GtkBin.
type Bin struct {
	Container
}

// native returns a pointer to the underlying GtkBin.
func (v *Bin) native() *C.GtkBin {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkBin(p)
}

func marshalBin(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapBin(obj), nil
}

func wrapBin(obj *glib.Object) *Bin {
	if obj == nil {
		return nil
	}

	return &Bin{Container{Widget{glib.InitiallyUnowned{obj}}}}
}

// GetChild is a wrapper around gtk_bin_get_child().
func (v *Bin) GetChild() (IWidget, error) {
	c := C.gtk_bin_get_child(v.native())
	if c == nil {
		return nil, nil
	}
	return castWidget(c)
}

/*
 * GtkBuilder
 */

// Builder is a representation of GTK's GtkBuilder.
type Builder struct {
	*glib.Object
}

// native() returns a pointer to the underlying GtkBuilder.
func (b *Builder) native() *C.GtkBuilder {
	if b == nil || b.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(b.GObject)
	return C.toGtkBuilder(p)
}

func marshalBuilder(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return &Builder{obj}, nil
}

// BuilderNew is a wrapper around gtk_builder_new().
func BuilderNew() (*Builder, error) {
	c := C.gtk_builder_new()
	if c == nil {
		return nil, nilPtrErr
	}
	obj := glib.Take(unsafe.Pointer(c))
	return &Builder{obj}, nil
}

// AddFromFile is a wrapper around gtk_builder_add_from_file().
func (b *Builder) AddFromFile(filename string) error {
	cstr := C.CString(filename)
	defer C.free(unsafe.Pointer(cstr))
	var err *C.GError = nil
	res := C.gtk_builder_add_from_file(b.native(), (*C.gchar)(cstr), &err)
	if res == 0 {
		defer C.g_error_free(err)
		return errors.New(goString(err.message))
	}
	return nil
}

// AddFromResource is a wrapper around gtk_builder_add_from_resource().
func (b *Builder) AddFromResource(path string) error {
	cstr := C.CString(path)
	defer C.free(unsafe.Pointer(cstr))
	var err *C.GError = nil
	res := C.gtk_builder_add_from_resource(b.native(), (*C.gchar)(cstr), &err)
	if res == 0 {
		defer C.g_error_free(err)
		return errors.New(goString(err.message))
	}
	return nil
}

// AddFromString is a wrapper around gtk_builder_add_from_string().
func (b *Builder) AddFromString(str string) error {
	cstr := C.CString(str)
	defer C.free(unsafe.Pointer(cstr))
	length := (C.gsize)(len(str))
	var err *C.GError = nil
	res := C.gtk_builder_add_from_string(b.native(), (*C.gchar)(cstr), length, &err)
	if res == 0 {
		defer C.g_error_free(err)
		return errors.New(goString(err.message))
	}
	return nil
}

// GetObject is a wrapper around gtk_builder_get_object(). The returned result
// is an IObject, so it will need to be type-asserted to the appropriate type before
// being used. For example, to get an object and type assert it as a window:
//
//	obj, err := builder.GetObject("window")
//	if err != nil {
//	    // object not found
//	    return
//	}
//	if w, ok := obj.(*gtk.Window); ok {
//	    // do stuff with w here
//	} else {
//	    // not a *gtk.Window
//	}
func (b *Builder) GetObject(name string) (glib.IObject, error) {
	cstr := C.CString(name)
	defer C.free(unsafe.Pointer(cstr))
	c := C.gtk_builder_get_object(b.native(), (*C.gchar)(cstr))
	if c == nil {
		return nil, errors.New("object '" + name + "' not found")
	}
	obj, err := cast(c)
	if err != nil {
		return nil, err
	}
	return obj, nil
}

var (
	builderSignals = struct {
		sync.RWMutex
		m map[*C.GtkBuilder]map[string]interface{}
	}{
		m: make(map[*C.GtkBuilder]map[string]interface{}),
	}
)

// ConnectSignals is a wrapper around gtk_builder_connect_signals_full().
func (b *Builder) ConnectSignals(signals map[string]interface{}) {
	builderSignals.Lock()
	builderSignals.m[b.native()] = signals
	builderSignals.Unlock()

	C._gtk_builder_connect_signals_full(b.native())
}

/*
 * GtkBuildable
 */

// TODO:
// GtkBuildableIface
// gtk_buildable_set_name().
// gtk_buildable_get_name().
// gtk_buildable_add_child().
// gtk_buildable_set_buildable_property().
// gtk_buildable_construct_child().
// gtk_buildable_custom_tag_start().
// gtk_buildable_custom_tag_end().
// gtk_buildable_custom_finished().
// gtk_buildable_parser_finished().
// gtk_buildable_get_internal_child().

/*
 * GtkButton
 */

// Button is a representation of GTK's GtkButton.
type Button struct {
	Bin

	// Interfaces
	IActionable
}

// native() returns a pointer to the underlying GtkButton.
func (v *Button) native() *C.GtkButton {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkButton(p)
}

func marshalButton(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapButton(obj), nil
}

func wrapButton(obj *glib.Object) *Button {
	if obj == nil {
		return nil
	}

	actionable := &Actionable{obj}
	return &Button{Bin{Container{Widget{glib.InitiallyUnowned{obj}}}}, actionable}
}

// ButtonNew() is a wrapper around gtk_button_new().
func ButtonNew() (*Button, error) {
	c := C.gtk_button_new()
	if c == nil {
		return nil, nilPtrErr
	}
	obj := glib.Take(unsafe.Pointer(c))
	return wrapButton(obj), nil
}

// ButtonNewWithLabel() is a wrapper around gtk_button_new_with_label().
func ButtonNewWithLabel(label string) (*Button, error) {
	cstr := C.CString(label)
	defer C.free(unsafe.Pointer(cstr))
	c := C.gtk_button_new_with_label((*C.gchar)(cstr))
	if c == nil {
		return nil, nilPtrErr
	}
	obj := glib.Take(unsafe.Pointer(c))
	return wrapButton(obj), nil
}

// ButtonNewWithMnemonic() is a wrapper around gtk_button_new_with_mnemonic().
func ButtonNewWithMnemonic(label string) (*Button, error) {
	cstr := C.CString(label)
	defer C.free(unsafe.Pointer(cstr))
	c := C.gtk_button_new_with_mnemonic((*C.gchar)(cstr))
	if c == nil {
		return nil, nilPtrErr
	}
	obj := glib.Take(unsafe.Pointer(c))
	return wrapButton(obj), nil
}

// Clicked() is a wrapper around gtk_button_clicked().
func (v *Button) Clicked() {
	C.gtk_button_clicked(v.native())
}

// SetRelief() is a wrapper around gtk_button_set_relief().
func (v *Button) SetRelief(newStyle ReliefStyle) {
	C.gtk_button_set_relief(v.native(), C.GtkReliefStyle(newStyle))
}

// GetRelief() is a wrapper around gtk_button_get_relief().
func (v *Button) GetRelief() ReliefStyle {
	c := C.gtk_button_get_relief(v.native())
	return ReliefStyle(c)
}

// SetLabel() is a wrapper around gtk_button_set_label().
func (v *Button) SetLabel(label string) {
	cstr := C.CString(label)
	defer C.free(unsafe.Pointer(cstr))
	C.gtk_button_set_label(v.native(), (*C.gchar)(cstr))
}

// GetLabel() is a wrapper around gtk_button_get_label().
func (v *Button) GetLabel() (string, error) {
	c := C.gtk_button_get_label(v.native())
	if c == nil {
		return "", nilPtrErr
	}
	return goString(c), nil
}

// SetUseUnderline() is a wrapper around gtk_button_set_use_underline().
func (v *Button) SetUseUnderline(useUnderline bool) {
	C.gtk_button_set_use_underline(v.native(), gbool(useUnderline))
}

// GetUseUnderline() is a wrapper around gtk_button_get_use_underline().
func (v *Button) GetUseUnderline() bool {
	c := C.gtk_button_get_use_underline(v.native())
	return gobool(c)
}

// SetImage() is a wrapper around gtk_button_set_image().
func (v *Button) SetImage(image IWidget) {
	C.gtk_button_set_image(v.native(), image.toWidget())
}

// GetImage() is a wrapper around gtk_button_get_image().
func (v *Button) GetImage() (IWidget, error) {
	c := C.gtk_button_get_image(v.native())
	if c == nil {
		return nil, nil
	}
	return castWidget(c)
}

// SetImagePosition() is a wrapper around gtk_button_set_image_position().
func (v *Button) SetImagePosition(position PositionType) {
	C.gtk_button_set_image_position(v.native(), C.GtkPositionType(position))
}

// GetImagePosition() is a wrapper around gtk_button_get_image_position().
func (v *Button) GetImagePosition() PositionType {
	c := C.gtk_button_get_image_position(v.native())
	return PositionType(c)
}

// SetAlwaysShowImage() is a wrapper around gtk_button_set_always_show_image().
func (v *Button) SetAlwaysShowImage(alwaysShow bool) {
	C.gtk_button_set_always_show_image(v.native(), gbool(alwaysShow))
}

// GetAlwaysShowImage() is a wrapper around gtk_button_get_always_show_image().
func (v *Button) GetAlwaysShowImage() bool {
	c := C.gtk_button_get_always_show_image(v.native())
	return gobool(c)
}

// GetEventWindow() is a wrapper around gtk_button_get_event_window().
func (v *Button) GetEventWindow() (*gdk.Window, error) {
	c := C.gtk_button_get_event_window(v.native())
	if c == nil {
		return nil, nilPtrErr
	}

	w := &gdk.Window{glib.Take(unsafe.Pointer(c))}
	return w, nil
}

/*
 * GtkColorButton
 */

// ColorButton is a representation of GTK's GtkColorButton.
type ColorButton struct {
	Button

	// Interfaces
	ColorChooser
}

// Native returns a pointer to the underlying GtkColorButton.
func (v *ColorButton) native() *C.GtkColorButton {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkColorButton(p)
}

func wrapColorButton(obj *glib.Object) *ColorButton {
	if obj == nil {
		return nil
	}

	cc := wrapColorChooser(obj)
	actionable := wrapActionable(obj)
	return &ColorButton{Button{Bin{Container{Widget{
		glib.InitiallyUnowned{obj}}}}, actionable}, *cc}
}

// ColorButtonNew is a wrapper around gtk_color_button_new().
func ColorButtonNew() (*ColorButton, error) {
	c := C.gtk_color_button_new()
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapColorButton(glib.Take(unsafe.Pointer(c))), nil
}

// ColorButtonNewWithRGBA is a wrapper around gtk_color_button_new_with_rgba().
func ColorButtonNewWithRGBA(gdkColor *gdk.RGBA) (*ColorButton, error) {
	c := C.gtk_color_button_new_with_rgba((*C.GdkRGBA)(unsafe.Pointer(gdkColor.Native())))
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapColorButton(glib.Take(unsafe.Pointer(c))), nil
}

// SetTitle is a wrapper around gtk_color_button_set_title().
func (v *ColorButton) SetTitle(title string) {
	cstr := C.CString(title)
	defer C.free(unsafe.Pointer(cstr))
	C.gtk_color_button_set_title(v.native(), (*C.gchar)(cstr))
}

// GetTitle is a wrapper around gtk_color_button_get_title().
func (v *ColorButton) GetTitle() string {
	c := C.gtk_color_button_get_title(v.native())
	defer C.free(unsafe.Pointer(c))
	return goString(c)
}

/*
 * GtkBox
 */

// Box is a representation of GTK's GtkBox.
type Box struct {
	Container
}

// native() returns a pointer to the underlying GtkBox.
func (v *Box) native() *C.GtkBox {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkBox(p)
}

func marshalBox(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapBox(obj), nil
}

func wrapBox(obj *glib.Object) *Box {
	if obj == nil {
		return nil
	}

	return &Box{Container{Widget{glib.InitiallyUnowned{obj}}}}
}

func (v *Box) toOrientable() *C.GtkOrientable {
	if v == nil {
		return nil
	}
	return C.toGtkOrientable(unsafe.Pointer(v.GObject))
}

// GetOrientation() is a wrapper around C.gtk_orientable_get_orientation() for a GtkBox
func (v *Box) GetOrientation() Orientation {
	return Orientation(C.gtk_orientable_get_orientation(v.toOrientable()))
}

// SetOrientation() is a wrapper around C.gtk_orientable_set_orientation() for a GtkBox
func (v *Box) SetOrientation(o Orientation) {
	C.gtk_orientable_set_orientation(v.toOrientable(), C.GtkOrientation(o))
}

// BoxNew() is a wrapper around gtk_box_new().
func BoxNew(orientation Orientation, spacing int) (*Box, error) {
	c := C.gtk_box_new(C.GtkOrientation(orientation), C.gint(spacing))
	if c == nil {
		return nil, nilPtrErr
	}
	obj := glib.Take(unsafe.Pointer(c))
	return wrapBox(obj), nil
}

// PackStart() is a wrapper around gtk_box_pack_start().
func (v *Box) PackStart(child IWidget, expand, fill bool, padding uint) {
	C.gtk_box_pack_start(v.native(), child.toWidget(), gbool(expand),
		gbool(fill), C.guint(padding))
}

// PackEnd() is a wrapper around gtk_box_pack_end().
func (v *Box) PackEnd(child IWidget, expand, fill bool, padding uint) {
	C.gtk_box_pack_end(v.native(), child.toWidget(), gbool(expand),
		gbool(fill), C.guint(padding))
}

// GetHomogeneous() is a wrapper around gtk_box_get_homogeneous().
func (v *Box) GetHomogeneous() bool {
	c := C.gtk_box_get_homogeneous(v.native())
	return gobool(c)
}

// SetHomogeneous() is a wrapper around gtk_box_set_homogeneous().
func (v *Box) SetHomogeneous(homogeneous bool) {
	C.gtk_box_set_homogeneous(v.native(), gbool(homogeneous))
}

// GetSpacing() is a wrapper around gtk_box_get_spacing().
func (v *Box) GetSpacing() int {
	c := C.gtk_box_get_spacing(v.native())
	return int(c)
}

// SetSpacing() is a wrapper around gtk_box_set_spacing()
func (v *Box) SetSpacing(spacing int) {
	C.gtk_box_set_spacing(v.native(), C.gint(spacing))
}

// ReorderChild() is a wrapper around gtk_box_reorder_child().
func (v *Box) ReorderChild(child IWidget, position int) {
	C.gtk_box_reorder_child(v.native(), child.toWidget(), C.gint(position))
}

// QueryChildPacking() is a wrapper around gtk_box_query_child_packing().
func (v *Box) QueryChildPacking(child IWidget) (expand, fill bool, padding uint, packType PackType) {
	var cexpand, cfill C.gboolean
	var cpadding C.guint
	var cpackType C.GtkPackType

	C.gtk_box_query_child_packing(v.native(), child.toWidget(), &cexpand,
		&cfill, &cpadding, &cpackType)
	return gobool(cexpand), gobool(cfill), uint(cpadding), PackType(cpackType)
}

// SetChildPacking() is a wrapper around gtk_box_set_child_packing().
func (v *Box) SetChildPacking(child IWidget, expand, fill bool, padding uint, packType PackType) {
	C.gtk_box_set_child_packing(v.native(), child.toWidget(), gbool(expand),
		gbool(fill), C.guint(padding), C.GtkPackType(packType))
}

/*
 * GtkCalendar
 */

// Calendar is a representation of GTK's GtkCalendar.
type Calendar struct {
	Widget
}

// native() returns a pointer to the underlying GtkCalendar.
func (v *Calendar) native() *C.GtkCalendar {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkCalendar(p)
}

func marshalCalendar(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapCalendar(obj), nil
}

func wrapCalendar(obj *glib.Object) *Calendar {
	if obj == nil {
		return nil
	}

	return &Calendar{Widget{glib.InitiallyUnowned{obj}}}
}

// TODO:
// GtkCalendarDetailFunc

// CalendarNew is a wrapper around gtk_calendar_new().
func CalendarNew() (*Calendar, error) {
	c := C.gtk_calendar_new()
	if c == nil {
		return nil, nilPtrErr
	}
	obj := glib.Take(unsafe.Pointer(c))
	return wrapCalendar(obj), nil
}

// SelectMonth is a wrapper around gtk_calendar_select_month().
func (v *Calendar) SelectMonth(month, year uint) {
	C.gtk_calendar_select_month(v.native(), C.guint(month), C.guint(year))
}

// SelectDay is a wrapper around gtk_calendar_select_day().
func (v *Calendar) SelectDay(day uint) {
	C.gtk_calendar_select_day(v.native(), C.guint(day))
}

// MarkDay is a wrapper around gtk_calendar_mark_day().
func (v *Calendar) MarkDay(day uint) {
	C.gtk_calendar_mark_day(v.native(), C.guint(day))
}

// UnmarkDay is a wrapper around gtk_calendar_unmark_day().
func (v *Calendar) UnmarkDay(day uint) {
	C.gtk_calendar_unmark_day(v.native(), C.guint(day))
}

// GetDayIsMarked is a wrapper around gtk_calendar_get_day_is_marked().
func (v *Calendar) GetDayIsMarked(day uint) bool {
	c := C.gtk_calendar_get_day_is_marked(v.native(), C.guint(day))
	return gobool(c)
}

// ClearMarks is a wrapper around gtk_calendar_clear_marks().
func (v *Calendar) ClearMarks() {
	C.gtk_calendar_clear_marks(v.native())
}

// GetDisplayOptions is a wrapper around gtk_calendar_get_display_options().
func (v *Calendar) GetDisplayOptions() CalendarDisplayOptions {
	c := C.gtk_calendar_get_display_options(v.native())
	return CalendarDisplayOptions(c)
}

// SetDisplayOptions is a wrapper around gtk_calendar_set_display_options().
func (v *Calendar) SetDisplayOptions(flags CalendarDisplayOptions) {
	C.gtk_calendar_set_display_options(v.native(),
		C.GtkCalendarDisplayOptions(flags))
}

// GetDate is a wrapper around gtk_calendar_get_date().
func (v *Calendar) GetDate() (year, month, day uint) {
	var cyear, cmonth, cday C.guint
	C.gtk_calendar_get_date(v.native(), &cyear, &cmonth, &cday)
	return uint(cyear), uint(cmonth), uint(cday)
}

// TODO:
// gtk_calendar_set_detail_func().

// GetDetailWidthChars is a wrapper around gtk_calendar_get_detail_width_chars().
func (v *Calendar) GetDetailWidthChars() int {
	c := C.gtk_calendar_get_detail_width_chars(v.native())
	return int(c)
}

// SetDetailWidthChars is a wrapper around gtk_calendar_set_detail_width_chars().
func (v *Calendar) SetDetailWidthChars(chars int) {
	C.gtk_calendar_set_detail_width_chars(v.native(), C.gint(chars))
}

// GetDetailHeightRows is a wrapper around gtk_calendar_get_detail_height_rows().
func (v *Calendar) GetDetailHeightRows() int {
	c := C.gtk_calendar_get_detail_height_rows(v.native())
	return int(c)
}

// SetDetailHeightRows is a wrapper around gtk_calendar_set_detail_height_rows().
func (v *Calendar) SetDetailHeightRows(rows int) {
	C.gtk_calendar_set_detail_height_rows(v.native(), C.gint(rows))
}

/*
 * GtkCellLayout
 */

// CellLayout is a representation of GTK's GtkCellLayout GInterface.
type CellLayout struct {
	*glib.Object
}

// ICellLayout is an interface type implemented by all structs
// embedding a CellLayout.  It is meant to be used as an argument type
// for wrapper functions that wrap around a C GTK function taking a
// GtkCellLayout.
type ICellLayout interface {
	toCellLayout() *C.GtkCellLayout
}

// native() returns a pointer to the underlying GObject as a GtkCellLayout.
func (v *CellLayout) native() *C.GtkCellLayout {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkCellLayout(p)
}

func marshalCellLayout(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapCellLayout(obj), nil
}

func wrapCellLayout(obj *glib.Object) *CellLayout {
	if obj == nil {
		return nil
	}

	return &CellLayout{obj}
}

func (v *CellLayout) toCellLayout() *C.GtkCellLayout {
	if v == nil {
		return nil
	}
	return v.native()
}

// PackStart is a wrapper around gtk_cell_layout_pack_start().
func (v *CellLayout) PackStart(cell ICellRenderer, expand bool) {
	C.gtk_cell_layout_pack_start(v.native(), cell.toCellRenderer(),
		gbool(expand))
}

// AddAttribute is a wrapper around gtk_cell_layout_add_attribute().
func (v *CellLayout) AddAttribute(cell ICellRenderer, attribute string, column int) {
	cstr := C.CString(attribute)
	defer C.free(unsafe.Pointer(cstr))
	C.gtk_cell_layout_add_attribute(v.native(), cell.toCellRenderer(),
		(*C.gchar)(cstr), C.gint(column))
}

// ClearAttributes is a wrapper around gtk_cell_layout_clear_attributes()
func (v *CellLayout) ClearAttributes(cell ICellRenderer) {
	C.gtk_cell_layout_clear_attributes(v.native(), cell.toCellRenderer())
}

/*
 * GtkCellView
 */

// TODO:
// GtkCellView
// gtk_cell_view_new().
// gtk_cell_view_new_with_context().
// gtk_cell_view_new_with_text().
// gtk_cell_view_new_with_markup().
// gtk_cell_view_new_with_pixbuf().
// gtk_cell_view_set_model().
// gtk_cell_view_get_model().
// gtk_cell_view_set_displayed_row().
// gtk_cell_view_get_displayed_row().
// gtk_cell_view_set_background_rgba().
// gtk_cell_view_set_draw_sensitive().
// gtk_cell_view_get_draw_sensitive().
// gtk_cell_view_set_fit_model().
// gtk_cell_view_get_fit_model().

/*
 * GtkCellEditable
 */

// CellEditable is a representation of GTK's GtkCellEditable GInterface.
type CellEditable struct {
	glib.InitiallyUnowned
	// Widget
}

// ICellEditable is an interface type implemented by all structs
// embedding an CellEditable. It is meant to be used as an argument type
// for wrapper functions that wrap around a C GTK function taking a
// GtkCellEditable.
type ICellEditable interface {
	toCellEditable() *C.GtkCellEditable
	ToEntry() *Entry
}

// native() returns a pointer to the underlying GObject as a GtkCellEditable.
func (v *CellEditable) native() *C.GtkCellEditable {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkCellEditable(p)
}

func marshalCellEditable(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapCellEditable(obj), nil
}

func wrapCellEditable(obj *glib.Object) *CellEditable {
	if obj == nil {
		return nil
	}

	// return &CellEditable{Widget{glib.InitiallyUnowned{obj}}}
	return &CellEditable{glib.InitiallyUnowned{obj}}
}

func (v *CellEditable) toCellEditable() *C.GtkCellEditable {
	if v == nil {
		return nil
	}
	return v.native()
}

// ToEntry is a helper tool, e.g: it returns *gtk.CellEditable as a *gtk.Entry
// that embedding this CellEditable instance, then it can be used with
// CellRendererText to adding EntryCompletion tools or intercepting EntryBuffer,
// (to bypass "canceled" signal for example) then record entry, and much more.
func (v *CellEditable) ToEntry() *Entry {
	return &Entry{Widget{glib.InitiallyUnowned{v.Object}},
		Editable{v.Object},
		*v}
}

// StartEditing is a wrapper around gtk_cell_editable_start_editing().
func (v *CellEditable) StartEditing(event *gdk.Event) {
	C.gtk_cell_editable_start_editing(v.native(),
		(*C.GdkEvent)(unsafe.Pointer(event.Native())))
}

// EditingDone is a wrapper around gtk_cell_editable_editing_done().
func (v *CellEditable) EditingDone() {
	C.gtk_cell_editable_editing_done(v.native())
}

// RemoveWidget is a wrapper around gtk_cell_editable_remove_widget().
func (v *CellEditable) RemoveWidget() {
	C.gtk_cell_editable_remove_widget(v.native())
}

/*
 * GtkCellRenderer
 */

// CellRenderer is a representation of GTK's GtkCellRenderer.
type CellRenderer struct {
	glib.InitiallyUnowned
}

// ICellRenderer is an interface type implemented by all structs
// embedding a CellRenderer.  It is meant to be used as an argument type
// for wrapper functions that wrap around a C GTK function taking a
// GtkCellRenderer.
type ICellRenderer interface {
	toCellRenderer() *C.GtkCellRenderer
}

// native returns a pointer to the underlying GtkCellRenderer.
func (v *CellRenderer) native() *C.GtkCellRenderer {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkCellRenderer(p)
}

func (v *CellRenderer) toCellRenderer() *C.GtkCellRenderer {
	if v == nil {
		return nil
	}
	return v.native()
}

func marshalCellRenderer(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapCellRenderer(obj), nil
}

func wrapCellRenderer(obj *glib.Object) *CellRenderer {
	if obj == nil {
		return nil
	}

	return &CellRenderer{glib.InitiallyUnowned{obj}}
}

// Activate is a wrapper around gtk_cell_renderer_activate().
func (v *CellRenderer) Activate(event *gdk.Event, widget IWidget, path string,
	backgroundArea, cellArea *gdk.Rectangle, flags CellRendererState) bool {

	cstr := C.CString(path)
	defer C.free(unsafe.Pointer(cstr))
	e := (*C.GdkEvent)(unsafe.Pointer(event.Native()))

	c := C.gtk_cell_renderer_activate(v.native(), e, widget.toWidget(),
		(*C.gchar)(cstr), nativeGdkRectangle(*backgroundArea),
		nativeGdkRectangle(*cellArea), C.GtkCellRendererState(flags))

	return gobool(c)
}

// StartEditing is a wrapper around gtk_cell_renderer_start_editing().
func (v *CellRenderer) StartEditing(event *gdk.Event, widget IWidget, path string,
	backgroundArea, cellArea *gdk.Rectangle, flags CellRendererState) (ICellEditable, error) {

	cstr := C.CString(path)
	defer C.free(unsafe.Pointer(cstr))
	e := (*C.GdkEvent)(unsafe.Pointer(event.Native()))

	c := C.gtk_cell_renderer_start_editing(v.native(), e, widget.toWidget(),
		(*C.gchar)(cstr), nativeGdkRectangle(*backgroundArea),
		nativeGdkRectangle(*cellArea), C.GtkCellRendererState(flags))

	return castCellEditable(c)
}

// StopEditing is a wrapper around gtk_cell_renderer_stop_editing().
func (v *CellRenderer) StopEditing(canceled bool) {
	C.gtk_cell_renderer_stop_editing(v.native(), gbool(canceled))
}

// GetVisible is a wrapper around gtk_cell_renderer_get_visible().
func (v *CellRenderer) GetVisible() bool {
	return gobool(C.gtk_cell_renderer_get_visible(v.native()))
}

// SetVisible is a wrapper around gtk_cell_renderer_set_visible().
func (v *CellRenderer) SetVisible(visible bool) {
	C.gtk_cell_renderer_set_visible(v.native(), gbool(visible))
}

// GetSensitive is a wrapper around gtk_cell_renderer_get_sensitive().
func (v *CellRenderer) GetSensitive() bool {
	return gobool(C.gtk_cell_renderer_get_sensitive(v.native()))
}

// SetSentitive is a wrapper around gtk_cell_renderer_set_sensitive().
func (v *CellRenderer) SetSentitive(sensitive bool) {
	C.gtk_cell_renderer_set_sensitive(v.native(), gbool(sensitive))
}

// IsActivatable is a wrapper around gtk_cell_renderer_is_activatable().
func (v *CellRenderer) IsActivatable() bool {
	return gobool(C.gtk_cell_renderer_is_activatable(v.native()))
}

// GetState is a wrapper around gtk_cell_renderer_get_state().
func (v *CellRenderer) GetState(widget IWidget,
	flags CellRendererState) StateFlags {

	return StateFlags(C.gtk_cell_renderer_get_state(v.native(),
		widget.toWidget(),
		C.GtkCellRendererState(flags)))
}

// SetAlignment is a wrapper around gtk_tree_view_column_set_alignment().
func (v *CellRenderer) SetAlignment(xalign float64, yalign float64) {
	C.gtk_cell_renderer_set_alignment(v.native(), C.gfloat(xalign), C.gfloat(yalign))
}

// TODO: gtk_cell_renderer_get_aligned_area
// TODO: gtk_cell_renderer_get_size
// TODO: gtk_cell_renderer_render
// TODO: gtk_cell_renderer_activate
// TODO: gtk_cell_renderer_start_editing
// TODO: gtk_cell_renderer_stop_editing
// TODO: gtk_cell_renderer_get_fixed_size
// TODO: gtk_cell_renderer_set_fixed_size
// TODO: gtk_cell_renderer_get_visible
// TODO: gtk_cell_renderer_set_visible
// TODO: gtk_cell_renderer_get_sensitive
// TODO: gtk_cell_renderer_set_sensitive
// TODO: gtk_cell_renderer_get_alignment
// TODO: gtk_cell_renderer_set_alignment
// TODO: gtk_cell_renderer_get_padding
// TODO: gtk_cell_renderer_set_padding
// TODO: gtk_cell_renderer_get_state
// TODO: gtk_cell_renderer_is_activatable
// TODO: gtk_cell_renderer_get_preferred_height
// TODO: gtk_cell_renderer_get_preferred_height_for_width
// TODO: gtk_cell_renderer_get_preferred_size
// TODO: gtk_cell_renderer_get_preferred_width
// TODO: gtk_cell_renderer_get_preferred_width_for_height
// TODO: gtk_cell_renderer_get_request_mode

/*
 * GtkCellRendererSpinner
 */

// CellRendererSpinner is a representation of GTK's GtkCellRendererSpinner.
type CellRendererSpinner struct {
	CellRenderer
}

// native returns a pointer to the underlying GtkCellRendererSpinner.
func (v *CellRendererSpinner) native() *C.GtkCellRendererSpinner {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkCellRendererSpinner(p)
}

func marshalCellRendererSpinner(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapCellRendererSpinner(obj), nil
}

func wrapCellRendererSpinner(obj *glib.Object) *CellRendererSpinner {
	if obj == nil {
		return nil
	}

	return &CellRendererSpinner{CellRenderer{glib.InitiallyUnowned{obj}}}
}

// CellRendererSpinnerNew is a wrapper around gtk_cell_renderer_spinner_new().
func CellRendererSpinnerNew() (*CellRendererSpinner, error) {
	c := C.gtk_cell_renderer_spinner_new()
	if c == nil {
		return nil, nilPtrErr
	}
	obj := glib.Take(unsafe.Pointer(c))
	return wrapCellRendererSpinner(obj), nil
}

/*
 * GtkCellRendererPixbuf
 */

// CellRendererPixbuf is a representation of GTK's GtkCellRendererPixbuf.
type CellRendererPixbuf struct {
	CellRenderer
}

// native returns a pointer to the underlying GtkCellRendererPixbuf.
func (v *CellRendererPixbuf) native() *C.GtkCellRendererPixbuf {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkCellRendererPixbuf(p)
}

func marshalCellRendererPixbuf(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapCellRendererPixbuf(obj), nil
}

func wrapCellRendererPixbuf(obj *glib.Object) *CellRendererPixbuf {
	if obj == nil {
		return nil
	}

	return &CellRendererPixbuf{CellRenderer{glib.InitiallyUnowned{obj}}}
}

// CellRendererPixbufNew is a wrapper around gtk_cell_renderer_pixbuf_new().
func CellRendererPixbufNew() (*CellRendererPixbuf, error) {
	c := C.gtk_cell_renderer_pixbuf_new()
	if c == nil {
		return nil, nilPtrErr
	}
	obj := glib.Take(unsafe.Pointer(c))
	return wrapCellRendererPixbuf(obj), nil
}

/*
 * GtkCellRendererProgress
 */

// CellRendererProgress is a representation of GTK's GtkCellRendererProgress.
type CellRendererProgress struct {
	CellRenderer
}

// native returns a pointer to the underlying GtkCellRendererProgress.
func (v *CellRendererProgress) native() *C.GtkCellRendererProgress {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkCellRendererProgress(p)
}

func marshalCellRendererProgress(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapCellRendererProgress(obj), nil
}

func wrapCellRendererProgress(obj *glib.Object) *CellRendererProgress {
	if obj == nil {
		return nil
	}

	return &CellRendererProgress{CellRenderer{glib.InitiallyUnowned{obj}}}
}

// CellRendererProgressNew is a wrapper around gtk_cell_renderer_progress_new().
func CellRendererProgressNew() (*CellRendererProgress, error) {
	c := C.gtk_cell_renderer_progress_new()
	if c == nil {
		return nil, nilPtrErr
	}
	obj := glib.Take(unsafe.Pointer(c))
	return wrapCellRendererProgress(obj), nil
}

/*
 * GtkCellRendererText
 */

// CellRendererText is a representation of GTK's GtkCellRendererText.
type CellRendererText struct {
	CellRenderer
}

// native returns a pointer to the underlying GtkCellRendererText.
func (v *CellRendererText) native() *C.GtkCellRendererText {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkCellRendererText(p)
}

func marshalCellRendererText(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapCellRendererText(obj), nil
}

func wrapCellRendererText(obj *glib.Object) *CellRendererText {
	if obj == nil {
		return nil
	}

	return &CellRendererText{CellRenderer{glib.InitiallyUnowned{obj}}}
}

// CellRendererTextNew is a wrapper around gtk_cell_renderer_text_new().
func CellRendererTextNew() (*CellRendererText, error) {
	c := C.gtk_cell_renderer_text_new()
	if c == nil {
		return nil, nilPtrErr
	}
	obj := glib.Take(unsafe.Pointer(c))
	return wrapCellRendererText(obj), nil
}

// SetFixedHeightFromFont is a wrapper around gtk_cell_renderer_text_set_fixed_height_from_font
func (v *CellRendererText) SetFixedHeightFromFont(numberOfRows int) {
	C.gtk_cell_renderer_text_set_fixed_height_from_font(v.native(), C.gint(numberOfRows))
}

/*
 * GtkCellRendererToggle
 */

// CellRendererToggle is a representation of GTK's GtkCellRendererToggle.
type CellRendererToggle struct {
	CellRenderer
}

// native returns a pointer to the underlying GtkCellRendererToggle.
func (v *CellRendererToggle) native() *C.GtkCellRendererToggle {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkCellRendererToggle(p)
}

func (v *CellRendererToggle) toCellRenderer() *C.GtkCellRenderer {
	if v == nil {
		return nil
	}
	return v.CellRenderer.native()
}

func marshalCellRendererToggle(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapCellRendererToggle(obj), nil
}

func wrapCellRendererToggle(obj *glib.Object) *CellRendererToggle {
	if obj == nil {
		return nil
	}

	return &CellRendererToggle{CellRenderer{glib.InitiallyUnowned{obj}}}
}

// CellRendererToggleNew is a wrapper around gtk_cell_renderer_toggle_new().
func CellRendererToggleNew() (*CellRendererToggle, error) {
	c := C.gtk_cell_renderer_toggle_new()
	if c == nil {
		return nil, nilPtrErr
	}
	obj := glib.Take(unsafe.Pointer(c))
	return wrapCellRendererToggle(obj), nil
}

// SetRadio is a wrapper around gtk_cell_renderer_toggle_set_radio().
func (v *CellRendererToggle) SetRadio(set bool) {
	C.gtk_cell_renderer_toggle_set_radio(v.native(), gbool(set))
}

// GetRadio is a wrapper around gtk_cell_renderer_toggle_get_radio().
func (v *CellRendererToggle) GetRadio() bool {
	c := C.gtk_cell_renderer_toggle_get_radio(v.native())
	return gobool(c)
}

// SetActive is a wrapper around gtk_cell_renderer_toggle_set_active().
func (v *CellRendererToggle) SetActive(active bool) {
	C.gtk_cell_renderer_toggle_set_active(v.native(), gbool(active))
}

// GetActive is a wrapper around gtk_cell_renderer_toggle_get_active().
func (v *CellRendererToggle) GetActive() bool {
	c := C.gtk_cell_renderer_toggle_get_active(v.native())
	return gobool(c)
}

// SetActivatable is a wrapper around gtk_cell_renderer_toggle_set_activatable().
func (v *CellRendererToggle) SetActivatable(activatable bool) {
	C.gtk_cell_renderer_toggle_set_activatable(v.native(),
		gbool(activatable))
}

// GetActivatable is a wrapper around gtk_cell_renderer_toggle_get_activatable().
func (v *CellRendererToggle) GetActivatable() bool {
	c := C.gtk_cell_renderer_toggle_get_activatable(v.native())
	return gobool(c)
}

/*
 * GtkCellRendererAccel
 */

// CellRendererAccel is a representation of GtkCellRendererAccel.
type CellRendererAccel struct {
	CellRendererText
}

// native returns a pointer to the underlying GtkCellRendererAccel.
func (v *CellRendererAccel) native() *C.GtkCellRendererAccel {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkCellRendererAccel(p)
}

func marshalCellRendererAccel(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapCellRendererAccel(obj), nil
}

func wrapCellRendererAccel(obj *glib.Object) *CellRendererAccel {
	if obj == nil {
		return nil
	}

	return &CellRendererAccel{CellRendererText{CellRenderer{glib.InitiallyUnowned{obj}}}}
}

// CellRendererAccelNew is a wrapper around gtk_cell_renderer_accel_new().
func CellRendererAccelNew() (*CellRendererAccel, error) {
	c := C.gtk_cell_renderer_accel_new()
	if c == nil {
		return nil, nilPtrErr
	}
	obj := glib.Take(unsafe.Pointer(c))
	return wrapCellRendererAccel(obj), nil
}

/*
 * GtkCellRendererCombo
 */

// CellRendererCombo is a representation of GtkCellRendererCombo.
type CellRendererCombo struct {
	CellRendererText
}

// native returns a pointer to the underlying GtkCellRendererCombo.
func (v *CellRendererCombo) native() *C.GtkCellRendererCombo {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkCellRendererCombo(p)
}

func marshalCellRendererCombo(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapCellRendererCombo(obj), nil
}

func wrapCellRendererCombo(obj *glib.Object) *CellRendererCombo {
	if obj == nil {
		return nil
	}

	return &CellRendererCombo{CellRendererText{CellRenderer{glib.InitiallyUnowned{obj}}}}
}

// CellRendererComboNew is a wrapper around gtk_cell_renderer_combo_new().
func CellRendererComboNew() (*CellRendererCombo, error) {
	c := C.gtk_cell_renderer_combo_new()
	if c == nil {
		return nil, nilPtrErr
	}
	obj := glib.Take(unsafe.Pointer(c))
	return wrapCellRendererCombo(obj), nil
}

/*
 * GtkCellRendererSpin
 */

// CellRendererSpin is a representation of GtkCellRendererSpin.
type CellRendererSpin struct {
	CellRendererText
}

// native returns a pointer to the underlying GtkCellRendererSpin.
func (v *CellRendererSpin) native() *C.GtkCellRendererSpin {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkCellRendererSpin(p)
}

func marshalCellRendererSpin(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapCellRendererSpin(obj), nil
}

func wrapCellRendererSpin(obj *glib.Object) *CellRendererSpin {
	if obj == nil {
		return nil
	}

	return &CellRendererSpin{CellRendererText{CellRenderer{glib.InitiallyUnowned{obj}}}}
}

// CellRendererSpinNew is a wrapper around gtk_cell_renderer_spin_new().
func CellRendererSpinNew() (*CellRendererSpin, error) {
	c := C.gtk_cell_renderer_spin_new()
	if c == nil {
		return nil, nilPtrErr
	}
	obj := glib.Take(unsafe.Pointer(c))
	return wrapCellRendererSpin(obj), nil
}

/*
 * GtkCheckButton
 */

// CheckButton is a wrapper around GTK's GtkCheckButton.
type CheckButton struct {
	ToggleButton
}

// native returns a pointer to the underlying GtkCheckButton.
func (v *CheckButton) native() *C.GtkCheckButton {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkCheckButton(p)
}

func marshalCheckButton(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapCheckButton(obj), nil
}

func wrapCheckButton(obj *glib.Object) *CheckButton {
	if obj == nil {
		return nil
	}

	actionable := wrapActionable(obj)
	return &CheckButton{ToggleButton{Button{Bin{Container{Widget{
		glib.InitiallyUnowned{obj}}}}, actionable}}}
}

// CheckButtonNew is a wrapper around gtk_check_button_new().
func CheckButtonNew() (*CheckButton, error) {
	c := C.gtk_check_button_new()
	if c == nil {
		return nil, nilPtrErr
	}
	obj := glib.Take(unsafe.Pointer(c))
	return wrapCheckButton(obj), nil
}

// CheckButtonNewWithLabel is a wrapper around
// gtk_check_button_new_with_label().
func CheckButtonNewWithLabel(label string) (*CheckButton, error) {
	cstr := C.CString(label)
	defer C.free(unsafe.Pointer(cstr))
	c := C.gtk_check_button_new_with_label((*C.gchar)(cstr))
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapCheckButton(glib.Take(unsafe.Pointer(c))), nil
}

// CheckButtonNewWithMnemonic is a wrapper around
// gtk_check_button_new_with_mnemonic().
func CheckButtonNewWithMnemonic(label string) (*CheckButton, error) {
	cstr := C.CString(label)
	defer C.free(unsafe.Pointer(cstr))
	c := C.gtk_check_button_new_with_mnemonic((*C.gchar)(cstr))
	if c == nil {
		return nil, nilPtrErr
	}
	obj := glib.Take(unsafe.Pointer(c))
	return wrapCheckButton(obj), nil
}

/*
 * GtkCheckMenuItem
 */

type CheckMenuItem struct {
	MenuItem
}

// native returns a pointer to the underlying GtkCheckMenuItem.
func (v *CheckMenuItem) native() *C.GtkCheckMenuItem {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkCheckMenuItem(p)
}

func marshalCheckMenuItem(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapCheckMenuItem(obj), nil
}

func wrapCheckMenuItem(obj *glib.Object) *CheckMenuItem {
	if obj == nil {
		return nil
	}

	return &CheckMenuItem{MenuItem{Bin{Container{Widget{
		glib.InitiallyUnowned{obj}}}}}}
}

// CheckMenuItemNew is a wrapper around gtk_check_menu_item_new().
func CheckMenuItemNew() (*CheckMenuItem, error) {
	c := C.gtk_check_menu_item_new()
	if c == nil {
		return nil, nilPtrErr
	}
	obj := glib.Take(unsafe.Pointer(c))
	return wrapCheckMenuItem(obj), nil
}

// CheckMenuItemNewWithLabel is a wrapper around gtk_check_menu_item_new_with_label().
func CheckMenuItemNewWithLabel(label string) (*CheckMenuItem, error) {
	cstr := C.CString(label)
	defer C.free(unsafe.Pointer(cstr))
	c := C.gtk_check_menu_item_new_with_label((*C.gchar)(cstr))
	if c == nil {
		return nil, nilPtrErr
	}
	obj := glib.Take(unsafe.Pointer(c))
	return wrapCheckMenuItem(obj), nil
}

// CheckMenuItemNewWithMnemonic is a wrapper around gtk_check_menu_item_new_with_mnemonic().
func CheckMenuItemNewWithMnemonic(label string) (*CheckMenuItem, error) {
	cstr := C.CString(label)
	defer C.free(unsafe.Pointer(cstr))
	c := C.gtk_check_menu_item_new_with_mnemonic((*C.gchar)(cstr))
	if c == nil {
		return nil, nilPtrErr
	}
	obj := glib.Take(unsafe.Pointer(c))
	return wrapCheckMenuItem(obj), nil
}

// GetActive is a wrapper around gtk_check_menu_item_get_active().
func (v *CheckMenuItem) GetActive() bool {
	c := C.gtk_check_menu_item_get_active(v.native())
	return gobool(c)
}

// SetActive is a wrapper around gtk_check_menu_item_set_active().
func (v *CheckMenuItem) SetActive(isActive bool) {
	C.gtk_check_menu_item_set_active(v.native(), gbool(isActive))
}

// Toggled is a wrapper around gtk_check_menu_item_toggled().
func (v *CheckMenuItem) Toggled() {
	C.gtk_check_menu_item_toggled(v.native())
}

// GetInconsistent is a wrapper around gtk_check_menu_item_get_inconsistent().
func (v *CheckMenuItem) GetInconsistent() bool {
	c := C.gtk_check_menu_item_get_inconsistent(v.native())
	return gobool(c)
}

// SetInconsistent is a wrapper around gtk_check_menu_item_set_inconsistent().
func (v *CheckMenuItem) SetInconsistent(setting bool) {
	C.gtk_check_menu_item_set_inconsistent(v.native(), gbool(setting))
}

// SetDrawAsRadio is a wrapper around gtk_check_menu_item_set_draw_as_radio().
func (v *CheckMenuItem) SetDrawAsRadio(drawAsRadio bool) {
	C.gtk_check_menu_item_set_draw_as_radio(v.native(), gbool(drawAsRadio))
}

// GetDrawAsRadio is a wrapper around gtk_check_menu_item_get_draw_as_radio().
func (v *CheckMenuItem) GetDrawAsRadio() bool {
	c := C.gtk_check_menu_item_get_draw_as_radio(v.native())
	return gobool(c)
}

/*
 * GtkClipboard
 */

// Clipboard is a wrapper around GTK's GtkClipboard.
type Clipboard struct {
	*glib.Object
}

// native returns a pointer to the underlying GtkClipboard.
func (v *Clipboard) native() *C.GtkClipboard {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkClipboard(p)
}

func marshalClipboard(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapClipboard(obj), nil
}

func wrapClipboard(obj *glib.Object) *Clipboard {
	if obj == nil {
		return nil
	}

	return &Clipboard{obj}
}

// Store is a wrapper around gtk_clipboard_store
func (v *Clipboard) Store() {
	C.gtk_clipboard_store(v.native())
}

// ClipboardGet() is a wrapper around gtk_clipboard_get().
func ClipboardGet(atom gdk.Atom) (*Clipboard, error) {
	c := C.gtk_clipboard_get(C.GdkAtom(unsafe.Pointer(atom)))
	if c == nil {
		return nil, nilPtrErr
	}

	cb := &Clipboard{glib.Take(unsafe.Pointer(c))}
	return cb, nil
}

// ClipboardGetForDisplay() is a wrapper around gtk_clipboard_get_for_display().
func ClipboardGetForDisplay(display *gdk.Display, atom gdk.Atom) (*Clipboard, error) {
	displayPtr := (*C.GdkDisplay)(unsafe.Pointer(display.Native()))
	c := C.gtk_clipboard_get_for_display(displayPtr,
		C.GdkAtom(unsafe.Pointer(atom)))
	if c == nil {
		return nil, nilPtrErr
	}

	cb := &Clipboard{glib.Take(unsafe.Pointer(c))}
	return cb, nil
}

// WaitIsTextAvailable is a wrapper around gtk_clipboard_wait_is_text_available
func (v *Clipboard) WaitIsTextAvailable() bool {
	c := C.gtk_clipboard_wait_is_text_available(v.native())
	return gobool(c)
}

// WaitForText is a wrapper around gtk_clipboard_wait_for_text
func (v *Clipboard) WaitForText() (string, error) {
	c := C.gtk_clipboard_wait_for_text(v.native())
	if c == nil {
		return "", nilPtrErr
	}
	defer C.g_free(C.gpointer(c))
	return goString(c), nil
}

// SetText() is a wrapper around gtk_clipboard_set_text().
func (v *Clipboard) SetText(text string) {
	cstr := C.CString(text)
	defer C.free(unsafe.Pointer(cstr))
	C.gtk_clipboard_set_text(v.native(), (*C.gchar)(cstr),
		C.gint(len(text)))
}

// WaitIsRichTextAvailable is a wrapper around gtk_clipboard_wait_is_rich_text_available
func (v *Clipboard) WaitIsRichTextAvailable(buf *TextBuffer) bool {
	c := C.gtk_clipboard_wait_is_rich_text_available(v.native(), buf.native())
	return gobool(c)
}

// WaitIsUrisAvailable is a wrapper around gtk_clipboard_wait_is_uris_available
func (v *Clipboard) WaitIsUrisAvailable() bool {
	c := C.gtk_clipboard_wait_is_uris_available(v.native())
	return gobool(c)
}

// WaitIsImageAvailable is a wrapper around gtk_clipboard_wait_is_image_available
func (v *Clipboard) WaitIsImageAvailable() bool {
	c := C.gtk_clipboard_wait_is_image_available(v.native())
	return gobool(c)
}

// SetImage is a wrapper around gtk_clipboard_set_image
func (v *Clipboard) SetImage(pixbuf *gdk.Pixbuf) {
	C.gtk_clipboard_set_image(v.native(), (*C.GdkPixbuf)(unsafe.Pointer(pixbuf.Native())))
}

// WaitForImage is a wrapper around gtk_clipboard_wait_for_image
func (v *Clipboard) WaitForImage() (*gdk.Pixbuf, error) {
	c := C.gtk_clipboard_wait_for_image(v.native())
	if c == nil {
		return nil, nilPtrErr
	}

	p := &gdk.Pixbuf{glib.Take(unsafe.Pointer(c))}
	return p, nil
}

// WaitIsTargetAvailable is a wrapper around gtk_clipboard_wait_is_target_available
func (v *Clipboard) WaitIsTargetAvailable(target gdk.Atom) bool {
	c := C.gtk_clipboard_wait_is_target_available(v.native(), C.GdkAtom(unsafe.Pointer(target)))
	return gobool(c)
}

// WaitForContents is a wrapper around gtk_clipboard_wait_for_contents
func (v *Clipboard) WaitForContents(target gdk.Atom) (*SelectionData, error) {
	c := C.gtk_clipboard_wait_for_contents(v.native(), C.GdkAtom(unsafe.Pointer(target)))
	if c == nil {
		return nil, nilPtrErr
	}
	p := &SelectionData{c}
	runtime.SetFinalizer(p, func(l *SelectionData) { glib.FinalizerStrategy(l.free) })
	return p, nil
}

/*
 * GtkContainer
 */

// Container is a representation of GTK's GtkContainer.
type Container struct {
	Widget
}

// native returns a pointer to the underlying GtkContainer.
func (v *Container) native() *C.GtkContainer {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkContainer(p)
}

func marshalContainer(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapContainer(obj), nil
}

func wrapContainer(obj *glib.Object) *Container {
	if obj == nil {
		return nil
	}

	return &Container{Widget{glib.InitiallyUnowned{obj}}}
}

// Add is a wrapper around gtk_container_add().
func (v *Container) Add(w IWidget) {
	C.gtk_container_add(v.native(), w.toWidget())
}

// Remove is a wrapper around gtk_container_remove().
func (v *Container) Remove(w IWidget) {
	C.gtk_container_remove(v.native(), w.toWidget())
}

// TODO: gtk_container_add_with_properties

// CheckResize is a wrapper around gtk_container_check_resize().
func (v *Container) CheckResize() {
	C.gtk_container_check_resize(v.native())
}

// TODO: gtk_container_foreach

// GetChildren is a wrapper around gtk_container_get_children().
func (v *Container) GetChildren() *glib.List {
	clist := C.gtk_container_get_children(v.native())
	if clist == nil {
		return nil
	}

	glist := glib.WrapList(uintptr(unsafe.Pointer(clist)))
	glist.DataWrapper(func(ptr unsafe.Pointer) interface{} {
		return wrapWidget(glib.Take(ptr))
	})

	return glist
}

// TODO: gtk_container_get_path_for_child

// GetFocusChild is a wrapper around gtk_container_get_focus_child().
func (v *Container) GetFocusChild() (IWidget, error) {
	c := C.gtk_container_get_focus_child(v.native())
	if c == nil {
		return nil, nil
	}
	return castWidget(c)
}

// SetFocusChild is a wrapper around gtk_container_set_focus_child().
func (v *Container) SetFocusChild(child IWidget) {
	C.gtk_container_set_focus_child(v.native(), child.toWidget())
}

// GetFocusVAdjustment is a wrapper around gtk_container_get_focus_vadjustment().
func (v *Container) GetFocusVAdjustment() *Adjustment {
	c := C.gtk_container_get_focus_vadjustment(v.native())
	if c == nil {
		return nil
	}
	obj := glib.Take(unsafe.Pointer(c))
	return wrapAdjustment(obj)
}

// SetFocusVAdjustment is a wrapper around gtk_container_set_focus_vadjustment().
func (v *Container) SetFocusVAdjustment(adjustment *Adjustment) {
	C.gtk_container_set_focus_vadjustment(v.native(), adjustment.native())
}

// GetFocusHAdjustment is a wrapper around gtk_container_get_focus_hadjustment().
func (v *Container) GetFocusHAdjustment() *Adjustment {
	c := C.gtk_container_get_focus_hadjustment(v.native())
	if c == nil {
		return nil
	}
	obj := glib.Take(unsafe.Pointer(c))
	return wrapAdjustment(obj)
}

// SetFocusHAdjustment is a wrapper around gtk_container_set_focus_hadjustment().
func (v *Container) SetFocusHAdjustment(adjustment *Adjustment) {
	C.gtk_container_set_focus_hadjustment(v.native(), adjustment.native())
}

// ChildType is a wrapper around gtk_container_child_type().
func (v *Container) ChildType() glib.Type {
	c := C.gtk_container_child_type(v.native())
	return glib.Type(c)
}

// TODO:
// gtk_container_child_get().
// gtk_container_child_set().

// ChildNotify is a wrapper around gtk_container_child_notify().
func (v *Container) ChildNotify(child IWidget, childProperty string) {
	cstr := C.CString(childProperty)
	defer C.free(unsafe.Pointer(cstr))
	C.gtk_container_child_notify(v.native(), child.toWidget(),
		(*C.gchar)(cstr))
}

// ChildGetProperty is a wrapper around gtk_container_child_get_property().
func (v *Container) ChildGetProperty(child IWidget, name string, valueType glib.Type) (interface{}, error) {
	gv, e := glib.ValueInit(valueType)
	if e != nil {
		return nil, e
	}
	cstr := C.CString(name)
	defer C.free(unsafe.Pointer(cstr))

	C.gtk_container_child_get_property(v.native(), child.toWidget(), (*C.gchar)(cstr), (*C.GValue)(unsafe.Pointer(gv.Native())))
	return gv.GoValue()
}

// ChildSetProperty is a wrapper around gtk_container_child_set_property().
func (v *Container) ChildSetProperty(child IWidget, name string, value interface{}) error {
	gv, e := glib.GValue(value)
	if e != nil {
		return e
	}
	cstr := C.CString(name)
	defer C.free(unsafe.Pointer(cstr))

	C.gtk_container_child_set_property(v.native(), child.toWidget(), (*C.gchar)(cstr), (*C.GValue)(unsafe.Pointer(gv.Native())))
	return nil
}

// TODO:
// gtk_container_child_get_valist().
// gtk_container_child_set_valist().
// gtk_container_child_notify_by_pspec().
// gtk_container_forall().

// GetBorderWidth is a wrapper around gtk_container_get_border_width().
func (v *Container) GetBorderWidth() uint {
	c := C.gtk_container_get_border_width(v.native())
	return uint(c)
}

// SetBorderWidth is a wrapper around gtk_container_set_border_width().
func (v *Container) SetBorderWidth(borderWidth uint) {
	C.gtk_container_set_border_width(v.native(), C.guint(borderWidth))
}

// PropagateDraw is a wrapper around gtk_container_propagate_draw().
func (v *Container) PropagateDraw(child IWidget, cr *cairo.Context) {
	context := (*C.cairo_t)(unsafe.Pointer(cr.Native()))
	C.gtk_container_propagate_draw(v.native(), child.toWidget(), context)
}

// TODO:
// gtk_container_class_find_child_property().
// gtk_container_class_install_child_property().
// gtk_container_class_install_child_properties().
// gtk_container_class_list_child_properties().
// gtk_container_class_handle_border_width().
// GtkResizeMode

// GdkCairoSetSourcePixBuf() is a wrapper around gdk_cairo_set_source_pixbuf().
func GdkCairoSetSourcePixBuf(cr *cairo.Context, pixbuf *gdk.Pixbuf, pixbufX, pixbufY float64) {
	context := (*C.cairo_t)(unsafe.Pointer(cr.Native()))
	ptr := (*C.GdkPixbuf)(unsafe.Pointer(pixbuf.Native()))
	C.gdk_cairo_set_source_pixbuf(context, ptr, C.gdouble(pixbufX), C.gdouble(pixbufY))
}

/*
 * GtkCssProvider
 */

// CssProvider is a representation of GTK's GtkCssProvider.
type CssProvider struct {
	*glib.Object
}

func (v *CssProvider) toStyleProvider() *C.GtkStyleProvider {
	if v == nil {
		return nil
	}
	return C.toGtkStyleProvider(unsafe.Pointer(v.native()))
}

// native returns a pointer to the underlying GtkCssProvider.
func (v *CssProvider) native() *C.GtkCssProvider {
	if v == nil || v.Object == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkCssProvider(p)
}

func marshalCssProvider(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapCssProvider(obj), nil
}

func wrapCssProvider(obj *glib.Object) *CssProvider {
	if obj == nil {
		return nil
	}

	return &CssProvider{obj}
}

// CssProviderNew is a wrapper around gtk_css_provider_new().
func CssProviderNew() (*CssProvider, error) {
	c := C.gtk_css_provider_new()
	if c == nil {
		return nil, nilPtrErr
	}

	return wrapCssProvider(glib.Take(unsafe.Pointer(c))), nil
}

// LoadFromPath is a wrapper around gtk_css_provider_load_from_path().
func (v *CssProvider) LoadFromPath(path string) error {
	cpath := C.CString(path)
	defer C.free(unsafe.Pointer(cpath))
	var gerr *C.GError
	if C.gtk_css_provider_load_from_path(v.native(), (*C.gchar)(cpath), &gerr) == 0 {
		defer C.g_error_free(gerr)
		return errors.New(goString(gerr.message))
	}
	return nil
}

// LoadFromData is a wrapper around gtk_css_provider_load_from_data().
func (v *CssProvider) LoadFromData(data string) error {
	cdata := C.CString(data)
	defer C.free(unsafe.Pointer(cdata))
	var gerr *C.GError
	if C.gtk_css_provider_load_from_data(v.native(), (*C.gchar)(unsafe.Pointer(cdata)), C.gssize(len(data)), &gerr) == 0 {
		defer C.g_error_free(gerr)
		return errors.New(goString(gerr.message))
	}
	return nil
}

// ToString is a wrapper around gtk_css_provider_to_string().
func (v *CssProvider) ToString() (string, error) {
	c := C.gtk_css_provider_to_string(v.native())
	if c == nil {
		return "", nilPtrErr
	}
	return C.GoString(c), nil
}

// CssProviderGetNamed is a wrapper around gtk_css_provider_get_named().
func CssProviderGetNamed(name string, variant string) (*CssProvider, error) {
	cname := C.CString(name)
	defer C.free(unsafe.Pointer(cname))
	cvariant := C.CString(variant)
	defer C.free(unsafe.Pointer(cvariant))

	c := C.gtk_css_provider_get_named((*C.gchar)(cname), (*C.gchar)(cvariant))
	if c == nil {
		return nil, nilPtrErr
	}

	obj := glib.Take(unsafe.Pointer(c))
	return wrapCssProvider(obj), nil
}

/*
 * GtkDialog
 */

// Dialog is a representation of GTK's GtkDialog.
type Dialog struct {
	Window
}

// native returns a pointer to the underlying GtkDialog.
func (v *Dialog) native() *C.GtkDialog {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkDialog(p)
}

func marshalDialog(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapDialog(obj), nil
}

func wrapDialog(obj *glib.Object) *Dialog {
	if obj == nil {
		return nil
	}

	return &Dialog{Window{Bin{Container{Widget{glib.InitiallyUnowned{obj}}}}}}
}

// DialogNew() is a wrapper around gtk_dialog_new().
func DialogNew() (*Dialog, error) {
	c := C.gtk_dialog_new()
	if c == nil {
		return nil, nilPtrErr
	}
	obj := glib.Take(unsafe.Pointer(c))
	return wrapDialog(obj), nil
}

// Run() is a wrapper around gtk_dialog_run().
func (v *Dialog) Run() ResponseType {
	c := C.gtk_dialog_run(v.native())
	return ResponseType(c)
}

// Response() is a wrapper around gtk_dialog_response().
func (v *Dialog) Response(response ResponseType) {
	C.gtk_dialog_response(v.native(), C.gint(response))
}

// AddButton() is a wrapper around gtk_dialog_add_button().  text may
// be either the literal button text, or if using GTK 3.8 or earlier, a
// Stock type converted to a string.
func (v *Dialog) AddButton(text string, id ResponseType) (*Button, error) {
	cstr := C.CString(text)
	defer C.free(unsafe.Pointer(cstr))
	c := C.gtk_dialog_add_button(v.native(), (*C.gchar)(cstr), C.gint(id))
	if c == nil {
		return nil, nilPtrErr
	}
	obj := glib.Take(unsafe.Pointer(c))
	return wrapButton(obj), nil
}

// TODO:
// gtk_dialog_add_buttons().

// AddActionWidget() is a wrapper around gtk_dialog_add_action_widget().
func (v *Dialog) AddActionWidget(child IWidget, id ResponseType) {
	C.gtk_dialog_add_action_widget(v.native(), child.toWidget(), C.gint(id))
}

// SetDefaultResponse() is a wrapper around gtk_dialog_set_default_response().
func (v *Dialog) SetDefaultResponse(id ResponseType) {
	C.gtk_dialog_set_default_response(v.native(), C.gint(id))
}

// SetResponseSensitive() is a wrapper around gtk_dialog_set_response_sensitive().
func (v *Dialog) SetResponseSensitive(id ResponseType, setting bool) {
	C.gtk_dialog_set_response_sensitive(v.native(), C.gint(id),
		gbool(setting))
}

// GetResponseForWidget is a wrapper around gtk_dialog_get_response_for_widget().
func (v *Dialog) GetResponseForWidget(widget IWidget) ResponseType {
	c := C.gtk_dialog_get_response_for_widget(v.native(), widget.toWidget())
	return ResponseType(c)
}

// GetWidgetForResponse is a wrapper around gtk_dialog_get_widget_for_response().
func (v *Dialog) GetWidgetForResponse(id ResponseType) (IWidget, error) {
	c := C.gtk_dialog_get_widget_for_response(v.native(), C.gint(id))
	if c == nil {
		return nil, nil
	}
	return castWidget(c)
}

// GetContentArea() is a wrapper around gtk_dialog_get_content_area().
func (v *Dialog) GetContentArea() (*Box, error) {
	c := C.gtk_dialog_get_content_area(v.native())
	if c == nil {
		return nil, nilPtrErr
	}
	obj := glib.Take(unsafe.Pointer(c))
	b := &Box{Container{Widget{glib.InitiallyUnowned{obj}}}}
	return b, nil
}

// DialogNewWithButtons() is a wrapper around gtk_dialog_new_with_buttons().
// i.e: []interface{}{"Accept", gtk.RESPONSE_ACCEPT}.
func DialogNewWithButtons(title string, parent IWindow, flags DialogFlags, buttons ...[]interface{}) (dialog *Dialog, err error) {
	cstr := (*C.gchar)(C.CString(title))
	defer C.free(unsafe.Pointer(cstr))

	var w *C.GtkWindow = nil
	if parent != nil {
		w = parent.toWindow()
	}

	var cbutton *C.gchar = nil
	c := C._gtk_dialog_new_with_buttons(cstr, w, C.GtkDialogFlags(flags), cbutton)
	if c == nil {
		return nil, nilPtrErr
	}
	dialog = wrapDialog(glib.Take(unsafe.Pointer(c)))

	for idx := 0; idx < len(buttons); idx++ {
		cbutton = (*C.gchar)(C.CString(buttons[idx][0].(string)))
		defer C.free(unsafe.Pointer(cbutton))

		if C.gtk_dialog_add_button(dialog.native(), cbutton, C.gint(buttons[idx][1].(ResponseType))) == nil {
			return nil, nilPtrErr
		}
	}
	return
}

/*
 * GtkDrawingArea
 */

// DrawingArea is a representation of GTK's GtkDrawingArea.
type DrawingArea struct {
	Widget
}

// native returns a pointer to the underlying GtkDrawingArea.
func (v *DrawingArea) native() *C.GtkDrawingArea {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkDrawingArea(p)
}

func marshalDrawingArea(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapDrawingArea(obj), nil
}

func wrapDrawingArea(obj *glib.Object) *DrawingArea {
	if obj == nil {
		return nil
	}

	return &DrawingArea{Widget{glib.InitiallyUnowned{obj}}}
}

// DrawingAreaNew is a wrapper around gtk_drawing_area_new().
func DrawingAreaNew() (*DrawingArea, error) {
	c := C.gtk_drawing_area_new()
	if c == nil {
		return nil, nilPtrErr
	}
	obj := glib.Take(unsafe.Pointer(c))
	return wrapDrawingArea(obj), nil
}

/*
 * GtkEditable
 */

// Editable is a representation of GTK's GtkEditable GInterface.
type Editable struct {
	*glib.Object
}

// IEditable is an interface type implemented by all structs
// embedding an Editable.  It is meant to be used as an argument type
// for wrapper functions that wrap around a C GTK function taking a
// GtkEditable.
type IEditable interface {
	toEditable() *C.GtkEditable
}

// native() returns a pointer to the underlying GObject as a GtkEditable.
func (v *Editable) native() *C.GtkEditable {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkEditable(p)
}

func marshalEditable(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapEditable(obj), nil
}

func wrapEditable(obj *glib.Object) *Editable {
	if obj == nil {
		return nil
	}

	return &Editable{obj}
}

func (v *Editable) toEditable() *C.GtkEditable {
	if v == nil {
		return nil
	}
	return v.native()
}

// SelectRegion is a wrapper around gtk_editable_select_region().
func (v *Editable) SelectRegion(startPos, endPos int) {
	C.gtk_editable_select_region(v.native(), C.gint(startPos),
		C.gint(endPos))
}

// GetSelectionBounds is a wrapper around gtk_editable_get_selection_bounds().
func (v *Editable) GetSelectionBounds() (start, end int, nonEmpty bool) {
	var cstart, cend C.gint
	c := C.gtk_editable_get_selection_bounds(v.native(), &cstart, &cend)
	return int(cstart), int(cend), gobool(c)
}

// InsertText is a wrapper around gtk_editable_insert_text(). The returned
// int is the position after the inserted text.
func (v *Editable) InsertText(newText string, position int) int {
	cstr := C.CString(newText)
	defer C.free(unsafe.Pointer(cstr))
	pos := new(C.gint)
	*pos = C.gint(position)
	C.gtk_editable_insert_text(v.native(), (*C.gchar)(cstr),
		C.gint(len(newText)), pos)
	return int(*pos)
}

// DeleteText is a wrapper around gtk_editable_delete_text().
func (v *Editable) DeleteText(startPos, endPos int) {
	C.gtk_editable_delete_text(v.native(), C.gint(startPos), C.gint(endPos))
}

// GetChars is a wrapper around gtk_editable_get_chars().
func (v *Editable) GetChars(startPos, endPos int) string {
	c := C.gtk_editable_get_chars(v.native(), C.gint(startPos),
		C.gint(endPos))
	defer C.free(unsafe.Pointer(c))
	return goString(c)
}

// CutClipboard is a wrapper around gtk_editable_cut_clipboard().
func (v *Editable) CutClipboard() {
	C.gtk_editable_cut_clipboard(v.native())
}

// CopyClipboard is a wrapper around gtk_editable_copy_clipboard().
func (v *Editable) CopyClipboard() {
	C.gtk_editable_copy_clipboard(v.native())
}

// PasteClipboard is a wrapper around gtk_editable_paste_clipboard().
func (v *Editable) PasteClipboard() {
	C.gtk_editable_paste_clipboard(v.native())
}

// DeleteSelection is a wrapper around gtk_editable_delete_selection().
func (v *Editable) DeleteSelection() {
	C.gtk_editable_delete_selection(v.native())
}

// SetPosition is a wrapper around gtk_editable_set_position().
func (v *Editable) SetPosition(position int) {
	C.gtk_editable_set_position(v.native(), C.gint(position))
}

// GetPosition is a wrapper around gtk_editable_get_position().
func (v *Editable) GetPosition() int {
	c := C.gtk_editable_get_position(v.native())
	return int(c)
}

// SetEditable is a wrapper around gtk_editable_set_editable().
func (v *Editable) SetEditable(isEditable bool) {
	C.gtk_editable_set_editable(v.native(), gbool(isEditable))
}

// GetEditable is a wrapper around gtk_editable_get_editable().
func (v *Editable) GetEditable() bool {
	c := C.gtk_editable_get_editable(v.native())
	return gobool(c)
}

/*
 * GtkEntry
 */

// Entry is a representation of GTK's GtkEntry.
type Entry struct {
	Widget

	// Interfaces
	Editable
	CellEditable
}

type IEntry interface {
	toEntry() *C.GtkEntry
}

func (v *Entry) toEntry() *C.GtkEntry {
	return v.native()
}

// native returns a pointer to the underlying GtkEntry.
func (v *Entry) native() *C.GtkEntry {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkEntry(p)
}

func marshalEntry(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapEntry(obj), nil
}

func wrapEntry(obj *glib.Object) *Entry {
	if obj == nil {
		return nil
	}

	e := wrapEditable(obj)
	ce := wrapCellEditable(obj)
	return &Entry{Widget{glib.InitiallyUnowned{obj}}, *e, *ce}
}

// EntryNew() is a wrapper around gtk_entry_new().
func EntryNew() (*Entry, error) {
	c := C.gtk_entry_new()
	if c == nil {
		return nil, nilPtrErr
	}
	obj := glib.Take(unsafe.Pointer(c))
	return wrapEntry(obj), nil
}

// EntryNewWithBuffer() is a wrapper around gtk_entry_new_with_buffer().
func EntryNewWithBuffer(buffer *EntryBuffer) (*Entry, error) {
	c := C.gtk_entry_new_with_buffer(buffer.native())
	if c == nil {
		return nil, nilPtrErr
	}
	obj := glib.Take(unsafe.Pointer(c))
	return wrapEntry(obj), nil
}

// GetBuffer() is a wrapper around gtk_entry_get_buffer().
func (v *Entry) GetBuffer() (*EntryBuffer, error) {
	c := C.gtk_entry_get_buffer(v.native())
	if c == nil {
		return nil, nilPtrErr
	}
	obj := glib.Take(unsafe.Pointer(c))
	return &EntryBuffer{obj}, nil
}

// SetBuffer() is a wrapper around gtk_entry_set_buffer().
func (v *Entry) SetBuffer(buffer *EntryBuffer) {
	C.gtk_entry_set_buffer(v.native(), buffer.native())
}

// SetText() is a wrapper around gtk_entry_set_text().
func (v *Entry) SetText(text string) {
	cstr := C.CString(text)
	defer C.free(unsafe.Pointer(cstr))
	C.gtk_entry_set_text(v.native(), (*C.gchar)(cstr))
}

// GetText() is a wrapper around gtk_entry_get_text().
func (v *Entry) GetText() (string, error) {
	c := C.gtk_entry_get_text(v.native())
	if c == nil {
		return "", nilPtrErr
	}
	return goString(c), nil
}

// GetTextLength() is a wrapper around gtk_entry_get_text_length().
func (v *Entry) GetTextLength() uint16 {
	c := C.gtk_entry_get_text_length(v.native())
	return uint16(c)
}

// GetTextArea is a wrapper around gtk_entry_get_text_area().
func (v *Entry) GetTextArea() *gdk.Rectangle {
	var cRect *C.GdkRectangle
	C.gtk_entry_get_text_area(v.native(), cRect)
	textArea := gdk.WrapRectangle(uintptr(unsafe.Pointer(cRect)))
	return textArea
}

// SetVisibility is a wrapper around gtk_entry_set_visibility().
func (v *Entry) SetVisibility(visible bool) {
	C.gtk_entry_set_visibility(v.native(), gbool(visible))
}

// SetInvisibleChar is a wrapper around gtk_entry_set_invisible_char().
func (v *Entry) SetInvisibleChar(ch rune) {
	C.gtk_entry_set_invisible_char(v.native(), C.gunichar(ch))
}

// UnsetInvisibleChar is a wrapper around gtk_entry_unset_invisible_char().
func (v *Entry) UnsetInvisibleChar() {
	C.gtk_entry_unset_invisible_char(v.native())
}

// SetMaxLength is a wrapper around gtk_entry_set_max_length().
func (v *Entry) SetMaxLength(len int) {
	C.gtk_entry_set_max_length(v.native(), C.gint(len))
}

// GetActivatesDefault is a wrapper around gtk_entry_get_activates_default().
func (v *Entry) GetActivatesDefault() bool {
	c := C.gtk_entry_get_activates_default(v.native())
	return gobool(c)
}

// GetHasFrame is a wrapper around gtk_entry_get_has_frame().
func (v *Entry) GetHasFrame() bool {
	c := C.gtk_entry_get_has_frame(v.native())
	return gobool(c)
}

// GetWidthChars is a wrapper around gtk_entry_get_width_chars().
func (v *Entry) GetWidthChars() int {
	c := C.gtk_entry_get_width_chars(v.native())
	return int(c)
}

// SetActivatesDefault is a wrapper around gtk_entry_set_activates_default().
func (v *Entry) SetActivatesDefault(setting bool) {
	C.gtk_entry_set_activates_default(v.native(), gbool(setting))
}

// SetHasFrame is a wrapper around gtk_entry_set_has_frame().
func (v *Entry) SetHasFrame(setting bool) {
	C.gtk_entry_set_has_frame(v.native(), gbool(setting))
}

// SetWidthChars is a wrapper around gtk_entry_set_width_chars().
func (v *Entry) SetWidthChars(nChars int) {
	C.gtk_entry_set_width_chars(v.native(), C.gint(nChars))
}

// GetInvisibleChar is a wrapper around gtk_entry_get_invisible_char().
func (v *Entry) GetInvisibleChar() rune {
	c := C.gtk_entry_get_invisible_char(v.native())
	return rune(c)
}

// SetAlignment is a wrapper around gtk_entry_set_alignment().
func (v *Entry) SetAlignment(xalign float32) {
	C.gtk_entry_set_alignment(v.native(), C.gfloat(xalign))
}

// GetAlignment is a wrapper around gtk_entry_get_alignment().
func (v *Entry) GetAlignment() float32 {
	c := C.gtk_entry_get_alignment(v.native())
	return float32(c)
}

// SetPlaceholderText is a wrapper around gtk_entry_set_placeholder_text().
func (v *Entry) SetPlaceholderText(text string) {
	cstr := C.CString(text)
	defer C.free(unsafe.Pointer(cstr))
	C.gtk_entry_set_placeholder_text(v.native(), (*C.gchar)(cstr))
}

// GetPlaceholderText is a wrapper around gtk_entry_get_placeholder_text().
func (v *Entry) GetPlaceholderText() (string, error) {
	c := C.gtk_entry_get_placeholder_text(v.native())
	if c == nil {
		return "", nilPtrErr
	}
	return goString(c), nil
}

// SetOverwriteMode is a wrapper around gtk_entry_set_overwrite_mode().
func (v *Entry) SetOverwriteMode(overwrite bool) {
	C.gtk_entry_set_overwrite_mode(v.native(), gbool(overwrite))
}

// GetOverwriteMode is a wrapper around gtk_entry_get_overwrite_mode().
func (v *Entry) GetOverwriteMode() bool {
	c := C.gtk_entry_get_overwrite_mode(v.native())
	return gobool(c)
}

// GetLayout is a wrapper around gtk_entry_get_layout().
func (v *Entry) GetLayout() *pango.Layout {
	c := C.gtk_entry_get_layout(v.native())
	return pango.WrapLayout(uintptr(unsafe.Pointer(c)))
}

// GetLayoutOffsets is a wrapper around gtk_entry_get_layout_offsets().
func (v *Entry) GetLayoutOffsets() (x, y int) {
	var gx, gy C.gint
	C.gtk_entry_get_layout_offsets(v.native(), &gx, &gy)
	return int(gx), int(gy)
}

// LayoutIndexToTextIndex is a wrapper around gtk_entry_layout_index_to_text_index().
func (v *Entry) LayoutIndexToTextIndex(layoutIndex int) int {
	c := C.gtk_entry_layout_index_to_text_index(v.native(),
		C.gint(layoutIndex))
	return int(c)
}

// TextIndexToLayoutIndex is a wrapper around gtk_entry_text_index_to_layout_index().
func (v *Entry) TextIndexToLayoutIndex(textIndex int) int {
	c := C.gtk_entry_text_index_to_layout_index(v.native(),
		C.gint(textIndex))
	return int(c)
}

// TODO: depends on PandoAttrList
// SetAttributes is a wrapper around gtk_entry_set_attributes().
// func (v *Entry) SetAttributes(attrList *pango.AttrList) {
// 	C.gtk_entry_set_attributes(v.native(), (*C.PangoAttrList)(unsafe.Pointer(attrList.Native())))
// }

// TODO: depends on PandoAttrList
// GetAttributes is a wrapper around gtk_entry_get_attributes().
// func (v *Entry) GetAttributes() (*pango.AttrList, error) {
// 	c := C.gtk_entry_get_attributes(v.native())
// 	if c == nil {
// 		return nil, nilPtrErr
// 	}
// 	return &pango.AttrList{unsafe.Pointer(c)}, nil
// }

// GetMaxLength is a wrapper around gtk_entry_get_max_length().
func (v *Entry) GetMaxLength() int {
	c := C.gtk_entry_get_max_length(v.native())
	return int(c)
}

// GetVisibility is a wrapper around gtk_entry_get_visibility().
func (v *Entry) GetVisibility() bool {
	c := C.gtk_entry_get_visibility(v.native())
	return gobool(c)
}

// SetCompletion is a wrapper around gtk_entry_set_completion().
func (v *Entry) SetCompletion(completion *EntryCompletion) {
	C.gtk_entry_set_completion(v.native(), completion.native())
}

// GetCompletion is a wrapper around gtk_entry_get_completion().
func (v *Entry) GetCompletion() (*EntryCompletion, error) {
	c := C.gtk_entry_get_completion(v.native())
	if c == nil {
		return nil, nilPtrErr
	}

	e := &EntryCompletion{glib.Take(unsafe.Pointer(c))}
	return e, nil
}

// SetCursorHAdjustment is a wrapper around gtk_entry_set_cursor_hadjustment().
func (v *Entry) SetCursorHAdjustment(adjustment *Adjustment) {
	C.gtk_entry_set_cursor_hadjustment(v.native(), adjustment.native())
}

// GetCursorHAdjustment is a wrapper around gtk_entry_get_cursor_hadjustment().
func (v *Entry) GetCursorHAdjustment() (*Adjustment, error) {
	c := C.gtk_entry_get_cursor_hadjustment(v.native())
	if c == nil {
		return nil, nilPtrErr
	}
	obj := glib.Take(unsafe.Pointer(c))
	return &Adjustment{glib.InitiallyUnowned{obj}}, nil
}

// SetProgressFraction is a wrapper around gtk_entry_set_progress_fraction().
func (v *Entry) SetProgressFraction(fraction float64) {
	C.gtk_entry_set_progress_fraction(v.native(), C.gdouble(fraction))
}

// GetProgressFraction is a wrapper around gtk_entry_get_progress_fraction().
func (v *Entry) GetProgressFraction() float64 {
	c := C.gtk_entry_get_progress_fraction(v.native())
	return float64(c)
}

// SetProgressPulseStep is a wrapper around gtk_entry_set_progress_pulse_step().
func (v *Entry) SetProgressPulseStep(fraction float64) {
	C.gtk_entry_set_progress_pulse_step(v.native(), C.gdouble(fraction))
}

// GetProgressPulseStep is a wrapper around gtk_entry_get_progress_pulse_step().
func (v *Entry) GetProgressPulseStep() float64 {
	c := C.gtk_entry_get_progress_pulse_step(v.native())
	return float64(c)
}

// ProgressPulse is a wrapper around gtk_entry_progress_pulse().
func (v *Entry) ProgressPulse() {
	C.gtk_entry_progress_pulse(v.native())
}

// IMContextFilterKeypress is a wrapper around gtk_entry_im_context_filter_keypress().
func (v *Entry) IMContextFilterKeypress(eventKey *gdk.EventKey) bool {
	key := (*C.GdkEventKey)(unsafe.Pointer(eventKey.Native()))
	c := C.gtk_entry_im_context_filter_keypress(v.native(), key)
	return gobool(c)
}

// ResetIMContext is a wrapper around gtk_entry_reset_im_context().
func (v *Entry) ResetIMContext() {
	C.gtk_entry_reset_im_context(v.native())
}

// SetIconFromPixbuf is a wrapper around gtk_entry_set_icon_from_pixbuf().
func (v *Entry) SetIconFromPixbuf(iconPos EntryIconPosition, pixbuf *gdk.Pixbuf) {
	var pb *C.GdkPixbuf
	if pixbuf != nil {
		pb = (*C.GdkPixbuf)(unsafe.Pointer(pixbuf.Native()))
	}

	C.gtk_entry_set_icon_from_pixbuf(v.native(), C.GtkEntryIconPosition(iconPos), pb)
}

// SetIconFromIconName is a wrapper around gtk_entry_set_icon_from_icon_name().
func (v *Entry) SetIconFromIconName(iconPos EntryIconPosition, name string) {
	var icon *C.gchar
	if name != "" {
		n := C.CString(name)
		defer C.free(unsafe.Pointer(n))
		icon = (*C.gchar)(n)
	}

	C.gtk_entry_set_icon_from_icon_name(v.native(), C.GtkEntryIconPosition(iconPos), icon)
}

// RemoveIcon is a convenience func to set a nil pointer to the icon name.
func (v *Entry) RemoveIcon(iconPos EntryIconPosition) {
	C.gtk_entry_set_icon_from_icon_name(v.native(), C.GtkEntryIconPosition(iconPos), nil)
}

// TODO: Needs gio/GIcon implemented first
// SetIconFromGIcon is a wrapper around gtk_entry_set_icon_from_gicon().
func (v *Entry) SetIconFromGIcon(iconPos EntryIconPosition, icon *glib.Icon) {
	C.gtk_entry_set_icon_from_gicon(v.native(),
		C.GtkEntryIconPosition(iconPos),
		(*C.GIcon)(icon.NativePrivate()))
}

// GetIconStorageType is a wrapper around gtk_entry_get_icon_storage_type().
func (v *Entry) GetIconStorageType(iconPos EntryIconPosition) ImageType {
	c := C.gtk_entry_get_icon_storage_type(v.native(), C.GtkEntryIconPosition(iconPos))
	return ImageType(c)
}

// GetIconPixbuf is a wrapper around gtk_entry_get_icon_pixbuf().
func (v *Entry) GetIconPixbuf(iconPos EntryIconPosition) (*gdk.Pixbuf, error) {
	c := C.gtk_entry_get_icon_pixbuf(v.native(), C.GtkEntryIconPosition(iconPos))
	if c == nil {
		return nil, nilPtrErr
	}
	return &gdk.Pixbuf{glib.Take(unsafe.Pointer(c))}, nil
}

// GetIconName is a wrapper around gtk_entry_get_icon_name().
func (v *Entry) GetIconName(iconPos EntryIconPosition) (string, error) {
	c := C.gtk_entry_get_icon_name(v.native(), C.GtkEntryIconPosition(iconPos))
	if c == nil {
		return "", nilPtrErr
	}
	return goString(c), nil
}

// GetIconGIcon is a wrapper around gtk_entry_get_icon_gicon().
func (v *Entry) GetIconGIcon(iconPos EntryIconPosition) (*glib.Icon, error) {
	c := C.gtk_entry_get_icon_gicon(v.native(), C.GtkEntryIconPosition(iconPos))
	if c == nil {
		return nil, nilPtrErr
	}
	obj := &glib.Object{glib.ToGObject(unsafe.Pointer(c))}
	i := &glib.Icon{obj}
	runtime.SetFinalizer(i, func(_ interface{}) { glib.FinalizerStrategy(obj.Unref) })
	return i, nil
}

// SetIconActivatable is a wrapper around gtk_entry_set_icon_activatable().
func (v *Entry) SetIconActivatable(iconPos EntryIconPosition, activatable bool) {
	C.gtk_entry_set_icon_activatable(v.native(), C.GtkEntryIconPosition(iconPos), gbool(activatable))
}

// GetIconActivatable is a wrapper around gtk_entry_get_icon_activatable().
func (v *Entry) GetIconActivatable(iconPos EntryIconPosition) bool {
	c := C.gtk_entry_get_icon_activatable(v.native(), C.GtkEntryIconPosition(iconPos))
	return gobool(c)
}

// SetIconSensitive is a wrapper around gtk_entry_set_icon_sensitive().
func (v *Entry) SetIconSensitive(iconPos EntryIconPosition, sensitive bool) {
	C.gtk_entry_set_icon_sensitive(v.native(), C.GtkEntryIconPosition(iconPos), gbool(sensitive))
}

// GetIconSensitive is a wrapper around gtk_entry_get_icon_sensitive().
func (v *Entry) GetIconSensitive(iconPos EntryIconPosition) bool {
	c := C.gtk_entry_get_icon_sensitive(v.native(), C.GtkEntryIconPosition(iconPos))
	return gobool(c)
}

// GetIconAtPos is a wrapper around gtk_entry_get_icon_at_pos().
func (v *Entry) GetIconAtPos(x, y int) int {
	c := C.gtk_entry_get_icon_at_pos(v.native(), C.gint(x), C.gint(y))
	return int(c)
}

// SetIconTooltipText is a wrapper around gtk_entry_set_icon_tooltip_text().
func (v *Entry) SetIconTooltipText(iconPos EntryIconPosition, tooltip string) {
	var text *C.gchar
	if tooltip != "" {
		cstr := C.CString(tooltip)
		defer C.free(unsafe.Pointer(cstr))
		text = cstr
	}

	C.gtk_entry_set_icon_tooltip_text(v.native(), C.GtkEntryIconPosition(iconPos), text)
}

// GetIconTooltipText is a wrapper around gtk_entry_get_icon_tooltip_text().
func (v *Entry) GetIconTooltipText(iconPos EntryIconPosition) (string, error) {
	c := C.gtk_entry_get_icon_tooltip_text(v.native(),
		C.GtkEntryIconPosition(iconPos))
	if c == nil {
		return "", nilPtrErr
	}
	return goString(c), nil
}

// SetIconTooltipMarkup is a wrapper around gtk_entry_set_icon_tooltip_markup().
func (v *Entry) SetIconTooltipMarkup(iconPos EntryIconPosition, tooltip string) {
	var text *C.gchar
	if tooltip != "" {
		cstr := C.CString(tooltip)
		defer C.free(unsafe.Pointer(cstr))
		text = cstr
	}

	C.gtk_entry_set_icon_tooltip_markup(v.native(), C.GtkEntryIconPosition(iconPos), text)
}

// GetIconTooltipMarkup is a wrapper around gtk_entry_get_icon_tooltip_markup().
func (v *Entry) GetIconTooltipMarkup(iconPos EntryIconPosition) (string, error) {
	c := C.gtk_entry_get_icon_tooltip_markup(v.native(),
		C.GtkEntryIconPosition(iconPos))
	if c == nil {
		return "", nilPtrErr
	}
	return goString(c), nil
}

// TODO: depends on GtkTargetList
// SetIconDragSource is a wrapper around gtk_entry_set_icon_drag_source().
// func (v *Entry) SetIconDragSource(iconPos EntryIconPosition, targetList *TargetList, action gdk.DragAction) {
// 	C.gtk_entry_set_icon_drag_source(v.native(), C.GtkEntryIconPosition(iconPos),
// 		targetList.native(), C.GdkDragAction(action))
// }

// GetCurrentIconDragSource is a wrapper around gtk_entry_get_current_icon_drag_source().
func (v *Entry) GetCurrentIconDragSource() int {
	c := C.gtk_entry_get_current_icon_drag_source(v.native())
	return int(c)
}

// GetIconArea is a wrapper around gtk_entry_get_icon_area().
func (v *Entry) GetIconArea(iconPos EntryIconPosition) *gdk.Rectangle {
	var cRect *C.GdkRectangle
	C.gtk_entry_get_icon_area(v.native(), C.GtkEntryIconPosition(iconPos), cRect)
	iconArea := gdk.WrapRectangle(uintptr(unsafe.Pointer(cRect)))
	return iconArea
}

// SetInputPurpose is a wrapper around gtk_entry_set_input_purpose().
func (v *Entry) SetInputPurpose(purpose InputPurpose) {
	C.gtk_entry_set_input_purpose(v.native(), C.GtkInputPurpose(purpose))
}

// GetInputPurpose is a wrapper around gtk_entry_get_input_purpose().
func (v *Entry) GetInputPurpose() InputPurpose {
	c := C.gtk_entry_get_input_purpose(v.native())
	return InputPurpose(c)
}

// SetInputHints is a wrapper around gtk_entry_set_input_hints().
func (v *Entry) SetInputHints(hints InputHints) {
	C.gtk_entry_set_input_hints(v.native(), C.GtkInputHints(hints))
}

// GetInputHints is a wrapper around gtk_entry_get_input_hints().
func (v *Entry) GetInputHints() InputHints {
	c := C.gtk_entry_get_input_hints(v.native())
	return InputHints(c)
}

/*
 * GtkEntryBuffer
 */

// EntryBuffer is a representation of GTK's GtkEntryBuffer.
type EntryBuffer struct {
	*glib.Object
}

// native returns a pointer to the underlying GtkEntryBuffer.
func (v *EntryBuffer) native() *C.GtkEntryBuffer {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkEntryBuffer(p)
}

func marshalEntryBuffer(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapEntryBuffer(obj), nil
}

func wrapEntryBuffer(obj *glib.Object) *EntryBuffer {
	if obj == nil {
		return nil
	}

	return &EntryBuffer{obj}
}

// EntryBufferNew() is a wrapper around gtk_entry_buffer_new().
func EntryBufferNew(initialChars string, nInitialChars int) (*EntryBuffer, error) {
	cstr := C.CString(initialChars)
	defer C.free(unsafe.Pointer(cstr))
	c := C.gtk_entry_buffer_new((*C.gchar)(cstr), C.gint(nInitialChars))
	if c == nil {
		return nil, nilPtrErr
	}

	e := wrapEntryBuffer(glib.Take(unsafe.Pointer(c)))
	return e, nil
}

// GetText() is a wrapper around gtk_entry_buffer_get_text().  A
// non-nil error is returned in the case that gtk_entry_buffer_get_text
// returns NULL to differentiate between NULL and an empty string.
func (v *EntryBuffer) GetText() (string, error) {
	c := C.gtk_entry_buffer_get_text(v.native())
	if c == nil {
		return "", nilPtrErr
	}
	return goString(c), nil
}

// SetText() is a wrapper around gtk_entry_buffer_set_text().
func (v *EntryBuffer) SetText(text string) {
	cstr := C.CString(text)
	defer C.free(unsafe.Pointer(cstr))
	C.gtk_entry_buffer_set_text(v.native(), (*C.gchar)(cstr),
		C.gint(len(text)))
}

// GetBytes() is a wrapper around gtk_entry_buffer_get_bytes().
func (v *EntryBuffer) GetBytes() uint {
	c := C.gtk_entry_buffer_get_bytes(v.native())
	return uint(c)
}

// GetLength() is a wrapper around gtk_entry_buffer_get_length().
func (v *EntryBuffer) GetLength() uint {
	c := C.gtk_entry_buffer_get_length(v.native())
	return uint(c)
}

// GetMaxLength() is a wrapper around gtk_entry_buffer_get_max_length().
func (v *EntryBuffer) GetMaxLength() int {
	c := C.gtk_entry_buffer_get_max_length(v.native())
	return int(c)
}

// SetMaxLength() is a wrapper around gtk_entry_buffer_set_max_length().
func (v *EntryBuffer) SetMaxLength(maxLength int) {
	C.gtk_entry_buffer_set_max_length(v.native(), C.gint(maxLength))
}

// InsertText() is a wrapper around gtk_entry_buffer_insert_text().
func (v *EntryBuffer) InsertText(position uint, text string) uint {
	cstr := C.CString(text)
	defer C.free(unsafe.Pointer(cstr))
	c := C.gtk_entry_buffer_insert_text(v.native(), C.guint(position),
		(*C.gchar)(cstr), C.gint(len(text)))
	return uint(c)
}

// DeleteText() is a wrapper around gtk_entry_buffer_delete_text().
func (v *EntryBuffer) DeleteText(position uint, nChars int) uint {
	c := C.gtk_entry_buffer_delete_text(v.native(), C.guint(position),
		C.gint(nChars))
	return uint(c)
}

// EmitDeletedText() is a wrapper around gtk_entry_buffer_emit_deleted_text().
func (v *EntryBuffer) EmitDeletedText(pos, nChars uint) {
	C.gtk_entry_buffer_emit_deleted_text(v.native(), C.guint(pos),
		C.guint(nChars))
}

// EmitInsertedText() is a wrapper around gtk_entry_buffer_emit_inserted_text().
func (v *EntryBuffer) EmitInsertedText(pos uint, text string) {
	cstr := C.CString(text)
	defer C.free(unsafe.Pointer(cstr))
	C.gtk_entry_buffer_emit_inserted_text(v.native(), C.guint(pos),
		(*C.gchar)(cstr), C.guint(len(text)))
}

/*
 * GtkEntryCompletion
 */

// EntryCompletion is a representation of GTK's GtkEntryCompletion.
type EntryCompletion struct {
	*glib.Object
}

// native returns a pointer to the underlying GtkEntryCompletion.
func (v *EntryCompletion) native() *C.GtkEntryCompletion {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkEntryCompletion(p)
}

func marshalEntryCompletion(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapEntryCompletion(obj), nil
}

func wrapEntryCompletion(obj *glib.Object) *EntryCompletion {
	if obj == nil {
		return nil
	}

	return &EntryCompletion{obj}
}

// TODO:
// GtkEntryCompletionMatchFunc

// EntryCompletionNew is a wrapper around gtk_entry_completion_new
func EntryCompletionNew() (*EntryCompletion, error) {
	c := C.gtk_entry_completion_new()
	if c == nil {
		return nil, nilPtrErr
	}
	obj := glib.Take(unsafe.Pointer(c))
	return wrapEntryCompletion(obj), nil
}

// TODO:
// gtk_entry_completion_new_with_area().
// gtk_entry_completion_get_entry().

// SetModel is a wrapper around gtk_entry_completion_set_model
func (v *EntryCompletion) SetModel(model ITreeModel) {
	var mptr *C.GtkTreeModel
	if model != nil {
		mptr = model.toTreeModel()
	}
	C.gtk_entry_completion_set_model(v.native(), mptr)
}

// GetModel is a wrapper around gtk_entry_completion_get_model
func (v *EntryCompletion) GetModel() (ITreeModel, error) {
	c := C.gtk_entry_completion_get_model(v.native())
	if c == nil {
		return nil, nilPtrErr
	}
	return castTreeModel(c)
}

// TODO:
// gtk_entry_completion_set_match_func().

// SetMinimumKeyLength is a wrapper around gtk_entry_completion_set_minimum_key_length
func (v *EntryCompletion) SetMinimumKeyLength(minimumLength int) {
	C.gtk_entry_completion_set_minimum_key_length(v.native(), C.gint(minimumLength))
}

// GetMinimumKeyLength is a wrapper around gtk_entry_completion_get_minimum_key_length
func (v *EntryCompletion) GetMinimumKeyLength() int {
	c := C.gtk_entry_completion_get_minimum_key_length(v.native())
	return int(c)
}

// TODO:
// gtk_entry_completion_compute_prefix().
// gtk_entry_completion_complete().
// gtk_entry_completion_get_completion_prefix().
// gtk_entry_completion_insert_prefix().
// gtk_entry_completion_insert_action_text().
// gtk_entry_completion_insert_action_markup().
// gtk_entry_completion_delete_action().

// SetTextColumn is a wrapper around gtk_entry_completion_set_text_column
func (v *EntryCompletion) SetTextColumn(textColumn int) {
	C.gtk_entry_completion_set_text_column(v.native(), C.gint(textColumn))
}

// GetTextColumn is a wrapper around gtk_entry_completion_get_text_column
func (v *EntryCompletion) GetTextColumn() int {
	c := C.gtk_entry_completion_get_text_column(v.native())
	return int(c)
}

// SetInlineCompletion is a wrapper around gtk_entry_completion_set_inline_completion
func (v *EntryCompletion) SetInlineCompletion(inlineCompletion bool) {
	C.gtk_entry_completion_set_inline_completion(v.native(), gbool(inlineCompletion))
}

// GetInlineCompletion is a wrapper around gtk_entry_completion_get_inline_completion
func (v *EntryCompletion) GetInlineCompletion() bool {
	c := C.gtk_entry_completion_get_inline_completion(v.native())
	return gobool(c)
}

// TODO
// gtk_entry_completion_set_inline_selection().
// gtk_entry_completion_get_inline_selection().

// SetPopupCompletion is a wrapper around gtk_entry_completion_set_popup_completion
func (v *EntryCompletion) SetPopupCompletion(popupCompletion bool) {
	C.gtk_entry_completion_set_popup_completion(v.native(), gbool(popupCompletion))
}

// GetPopupCompletion is a wrapper around gtk_entry_completion_get_popup_completion
func (v *EntryCompletion) GetPopupCompletion() bool {
	c := C.gtk_entry_completion_get_popup_completion(v.native())
	return gobool(c)
}

// SetPopupSetWidth is a wrapper around gtk_entry_completion_set_popup_set_width
func (v *EntryCompletion) SetPopupSetWidth(popupSetWidth bool) {
	C.gtk_entry_completion_set_popup_set_width(v.native(), gbool(popupSetWidth))
}

// GetPopupSetWidth is a wrapper around gtk_entry_completion_get_popup_set_width
func (v *EntryCompletion) GetPopupSetWidth() bool {
	c := C.gtk_entry_completion_get_popup_set_width(v.native())
	return gobool(c)
}

// TODO:
// gtk_entry_completion_set_popup_single_match().
// gtk_entry_completion_get_popup_single_match().

/*
 * GtkEventBox
 */

// EventBox is a representation of GTK's GtkEventBox.
type EventBox struct {
	Bin
}

// native returns a pointer to the underlying GtkEventBox.
func (v *EventBox) native() *C.GtkEventBox {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkEventBox(p)
}

func marshalEventBox(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapEventBox(obj), nil
}

func wrapEventBox(obj *glib.Object) *EventBox {
	if obj == nil {
		return nil
	}

	return &EventBox{Bin{Container{Widget{glib.InitiallyUnowned{obj}}}}}
}

// EventBoxNew is a wrapper around gtk_event_box_new().
func EventBoxNew() (*EventBox, error) {
	c := C.gtk_event_box_new()
	if c == nil {
		return nil, nilPtrErr
	}
	obj := glib.Take(unsafe.Pointer(c))
	return wrapEventBox(obj), nil
}

// SetAboveChild is a wrapper around gtk_event_box_set_above_child().
func (v *EventBox) SetAboveChild(aboveChild bool) {
	C.gtk_event_box_set_above_child(v.native(), gbool(aboveChild))
}

// GetAboveChild is a wrapper around gtk_event_box_get_above_child().
func (v *EventBox) GetAboveChild() bool {
	c := C.gtk_event_box_get_above_child(v.native())
	return gobool(c)
}

// SetVisibleWindow is a wrapper around gtk_event_box_set_visible_window().
func (v *EventBox) SetVisibleWindow(visibleWindow bool) {
	C.gtk_event_box_set_visible_window(v.native(), gbool(visibleWindow))
}

// GetVisibleWindow is a wrapper around gtk_event_box_get_visible_window().
func (v *EventBox) GetVisibleWindow() bool {
	c := C.gtk_event_box_get_visible_window(v.native())
	return gobool(c)
}

/*
 * GtkExpander
 */

// Expander is a representation of GTK's GtkExpander.
type Expander struct {
	Bin
}

// native returns a pointer to the underlying GtkExpander.
func (v *Expander) native() *C.GtkExpander {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkExpander(p)
}

func marshalExpander(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapExpander(obj), nil
}

func wrapExpander(obj *glib.Object) *Expander {
	if obj == nil {
		return nil
	}

	return &Expander{Bin{Container{Widget{glib.InitiallyUnowned{obj}}}}}
}

// ExpanderNew is a wrapper around gtk_expander_new().
func ExpanderNew(label string) (*Expander, error) {
	var cstr *C.gchar
	if label != "" {
		cstr = (*C.gchar)(C.CString(label))
		defer C.free(unsafe.Pointer(cstr))
	}
	c := C.gtk_expander_new(cstr)
	if c == nil {
		return nil, nilPtrErr
	}
	obj := glib.Take(unsafe.Pointer(c))
	return wrapExpander(obj), nil
}

// TODO:
// gtk_expander_new_with_mnemonic().

// SetExpanded is a wrapper around gtk_expander_set_expanded().
func (v *Expander) SetExpanded(expanded bool) {
	C.gtk_expander_set_expanded(v.native(), gbool(expanded))
}

// GetExpanded is a wrapper around gtk_expander_get_expanded().
func (v *Expander) GetExpanded() bool {
	c := C.gtk_expander_get_expanded(v.native())
	return gobool(c)
}

// SetLabel is a wrapper around gtk_expander_set_label().
func (v *Expander) SetLabel(label string) {
	var cstr *C.char
	if label != "" {
		cstr = C.CString(label)
		defer C.free(unsafe.Pointer(cstr))
	}
	C.gtk_expander_set_label(v.native(), (*C.gchar)(cstr))
}

// GetLabel is a wrapper around gtk_expander_get_label().
func (v *Expander) GetLabel() string {
	c := C.gtk_expander_get_label(v.native())
	return goString(c)
}

// TODO:
// gtk_expander_set_use_underline().
// gtk_expander_get_use_underline().
// gtk_expander_set_use_markup().
// gtk_expander_get_use_markup().

// SetLabelWidget is a wrapper around gtk_expander_set_label_widget().
func (v *Expander) SetLabelWidget(widget IWidget) {
	C.gtk_expander_set_label_widget(v.native(), widget.toWidget())
}

// TODO:
// gtk_expander_get_label_widget().
// gtk_expander_set_label_fill().
// gtk_expander_get_label_fill().
// gtk_expander_set_resize_toplevel().
// gtk_expander_get_resize_toplevel().

/*
 * GtkFileChooser
 */

// FileChoser is a representation of GTK's GtkFileChooser GInterface.
type FileChooser struct {
	*glib.Object
}

// native returns a pointer to the underlying GObject as a GtkFileChooser.
func (v *FileChooser) native() *C.GtkFileChooser {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkFileChooser(p)
}

func marshalFileChooser(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapFileChooser(obj), nil
}

func wrapFileChooser(obj *glib.Object) *FileChooser {
	if obj == nil {
		return nil
	}

	return &FileChooser{obj}
}

// SetFilename is a wrapper around gtk_file_chooser_set_filename().
func (v *FileChooser) SetFilename(filename string) bool {
	cstr := C.CString(filename)
	defer C.free(unsafe.Pointer(cstr))
	c := C.gtk_file_chooser_set_filename(v.native(), cstr)
	return gobool(c)
}

// GetFilename is a wrapper around gtk_file_chooser_get_filename().
func (v *FileChooser) GetFilename() string {
	c := C.gtk_file_chooser_get_filename(v.native())
	s := goString(c)
	defer C.g_free((C.gpointer)(c))
	return s
}

// SelectFilename is a wrapper around gtk_file_chooser_select_filename().
func (v *FileChooser) SelectFilename(filename string) bool {
	cstr := C.CString(filename)
	defer C.free(unsafe.Pointer(cstr))
	c := C.gtk_file_chooser_select_filename(v.native(), cstr)
	return gobool(c)
}

// UnselectFilename is a wrapper around gtk_file_chooser_unselect_filename().
func (v *FileChooser) UnselectFilename(filename string) {
	cstr := C.CString(filename)
	defer C.free(unsafe.Pointer(cstr))
	C.gtk_file_chooser_unselect_filename(v.native(), cstr)
}

// SelectAll is a wrapper around gtk_file_chooser_select_all().
func (v *FileChooser) SelectAll() {
	C.gtk_file_chooser_select_all(v.native())
}

// UnselectAll is a wrapper around gtk_file_chooser_unselect_all().
func (v *FileChooser) UnselectAll() {
	C.gtk_file_chooser_unselect_all(v.native())
}

// GetFilenames is a wrapper around gtk_file_chooser_get_filenames().
func (v *FileChooser) GetFilenames() ([]string, error) {
	clist := C.gtk_file_chooser_get_filenames(v.native())
	if clist == nil {
		return nil, nilPtrErr
	}

	slist := glib.WrapSList(uintptr(unsafe.Pointer(clist)))
	defer slist.Free()

	var filenames = make([]string, 0, slist.Length())
	for ; slist.DataRaw() != nil; slist = slist.Next() {
		w := (*C.char)(slist.DataRaw())
		defer C.free(unsafe.Pointer(w))

		filenames = append(filenames, C.GoString(w))
	}

	return filenames, nil
}

// GetURIs is a wrapper around gtk_file_chooser_get_uris().
func (v FileChooser) GetURIs() ([]string, error) {
	// TODO: do the same as in (v *FileChooser) GetFilenames()
	clist := C.gtk_file_chooser_get_uris(v.native())
	if clist == nil {
		return nil, nilPtrErr
	}

	slist := glib.WrapSList(uintptr(unsafe.Pointer(clist)))
	defer slist.Free()

	var uris = make([]string, 0, slist.Length())
	for ; slist.DataRaw() != nil; slist = slist.Next() {
		w := (*C.char)(slist.DataRaw())
		defer C.free(unsafe.Pointer(w))

		uris = append(uris, C.GoString(w))
	}

	return uris, nil
}

// SetDoOverwriteConfirmation is a wrapper around gtk_file_chooser_set_do_overwrite_confirmation().
func (v *FileChooser) SetDoOverwriteConfirmation(value bool) {
	C.gtk_file_chooser_set_do_overwrite_confirmation(v.native(), gbool(value))
}

// GetDoOverwriteConfirmation is a wrapper around gtk_file_chooser_get_do_overwrite_confirmation().
func (v *FileChooser) GetDoOverwriteConfirmation() bool {
	c := C.gtk_file_chooser_get_do_overwrite_confirmation(v.native())
	return gobool(c)
}

// SetAction is a wrapper around gtk_file_chooser_set_action().
func (v *FileChooser) SetAction(action FileChooserAction) {
	C.gtk_file_chooser_set_action(v.native(), C.GtkFileChooserAction(action))
}

// GetAction is a wrapper around gtk_file_chooser_get_action().
func (v *FileChooser) GetAction() FileChooserAction {
	return FileChooserAction(C.gtk_file_chooser_get_action(v.native()))
}

// SetCreateFolders is a wrapper around gtk_file_chooser_set_create_folders().
func (v *FileChooser) SetCreateFolders(value bool) {
	C.gtk_file_chooser_set_create_folders(v.native(), gbool(value))
}

// GetCreateFolders is a wrapper around gtk_file_chooser_get_create_folders().
func (v *FileChooser) GetCreateFolders() bool {
	c := C.gtk_file_chooser_get_create_folders(v.native())
	return gobool(c)
}

// SetCurrentName is a wrapper around gtk_file_chooser_set_current_name().
func (v *FileChooser) SetCurrentName(name string) {
	cstr := C.CString(name)
	defer C.free(unsafe.Pointer(cstr))
	C.gtk_file_chooser_set_current_name(v.native(), (*C.gchar)(cstr))
	return
}

// SetCurrentFolder is a wrapper around gtk_file_chooser_set_current_folder().
func (v *FileChooser) SetCurrentFolder(folder string) bool {
	cstr := C.CString(folder)
	defer C.free(unsafe.Pointer(cstr))
	c := C.gtk_file_chooser_set_current_folder(v.native(), (*C.gchar)(cstr))
	return gobool(c)
}

// GetCurrentFolder is a wrapper around gtk_file_chooser_get_current_folder().
func (v *FileChooser) GetCurrentFolder() (string, error) {
	c := C.gtk_file_chooser_get_current_folder(v.native())
	if c == nil {
		return "", nilPtrErr
	}
	defer C.free(unsafe.Pointer(c))
	return goString(c), nil
}

// SetPreviewWidget is a wrapper around gtk_file_chooser_set_preview_widget().
func (v *FileChooser) SetPreviewWidget(widget IWidget) {
	C.gtk_file_chooser_set_preview_widget(v.native(), widget.toWidget())
}

// GetPreviewWidget is a wrapper around gtk_file_chooser_get_preview_widget().
func (v *FileChooser) GetPreviewWidget() (IWidget, error) {
	c := C.gtk_file_chooser_get_preview_widget(v.native())
	if c == nil {
		return nil, nilPtrErr
	}
	return castWidget(c)
}

// SetPreviewWidgetActive is a wrapper around gtk_file_chooser_set_preview_widget_active().
func (v *FileChooser) SetPreviewWidgetActive(active bool) {
	C.gtk_file_chooser_set_preview_widget_active(v.native(), gbool(active))
}

// GetPreviewWidgetActive is a wrapper around gtk_file_chooser_get_preview_widget_active().
func (v *FileChooser) GetPreviewWidgetActive() bool {
	c := C.gtk_file_chooser_get_preview_widget_active(v.native())
	return gobool(c)
}

// GetPreviewFilename is a wrapper around gtk_file_chooser_get_preview_filename().
func (v *FileChooser) GetPreviewFilename() string {
	c := C.gtk_file_chooser_get_preview_filename(v.native())
	defer C.free(unsafe.Pointer(c))
	return C.GoString(c)
}

// GetURI is a wrapper around gtk_file_chooser_get_uri().
func (v *FileChooser) GetURI() string {
	c := C.gtk_file_chooser_get_uri(v.native())
	s := goString(c)
	defer C.g_free((C.gpointer)(c))
	return s
}

// AddFilter is a wrapper around gtk_file_chooser_add_filter().
func (v *FileChooser) AddFilter(filter *FileFilter) {
	C.gtk_file_chooser_add_filter(v.native(), filter.native())
}

// RemoveFilter is a wrapper around gtk_file_chooser_remove_filter().
func (v *FileChooser) RemoveFilter(filter *FileFilter) {
	C.gtk_file_chooser_remove_filter(v.native(), filter.native())
}

// SetFilter is a wrapper around gtk_file_chooser_set_filter().
func (v *FileChooser) SetFilter(filter *FileFilter) {
	C.gtk_file_chooser_set_filter(v.native(), filter.native())
}

// AddShortcutFolder is a wrapper around gtk_file_chooser_add_shortcut_folder().
func (v *FileChooser) AddShortcutFolder(folder string) bool {
	cstr := C.CString(folder)
	defer C.free(unsafe.Pointer(cstr))
	c := C.gtk_file_chooser_add_shortcut_folder(v.native(), cstr, nil)
	return gobool(c)
}

// SetLocalOnly is a wrapper around gtk_file_chooser_set_local_only().
func (v *FileChooser) SetLocalOnly(value bool) {
	C.gtk_file_chooser_set_local_only(v.native(), gbool(value))
}

// GetLocalOnly is a wrapper around gtk_file_chooser_get_local_only().
func (v *FileChooser) GetLocalOnly() bool {
	c := C.gtk_file_chooser_get_local_only(v.native())
	return gobool(c)
}

// SetSelectMultiple is a wrapper around gtk_file_chooser_set_select_multiple().
func (v *FileChooser) SetSelectMultiple(value bool) {
	C.gtk_file_chooser_set_select_multiple(v.native(), gbool(value))
}

// GetSelectMultiple is a wrapper around gtk_file_chooser_get_select_multiple().
func (v *FileChooser) GetSelectMultiple() bool {
	c := C.gtk_file_chooser_get_select_multiple(v.native())
	return gobool(c)
}

// SetExtraWidget is a wrapper around gtk_file_chooser_set_extra_widget().
func (v *FileChooser) SetExtraWidget(widget IWidget) {
	C.gtk_file_chooser_set_extra_widget(v.native(), widget.toWidget())
}

// GetExtraWidget is a wrapper around gtk_file_chooser_get_extra_widget().
func (v *FileChooser) GetExtraWidget() (IWidget, error) {
	c := C.gtk_file_chooser_get_extra_widget(v.native())
	if c == nil {
		return nil, nilPtrErr
	}
	return castWidget(c)
}

/*
 * GtkFileChooserButton
 */

// FileChooserButton is a representation of GTK's GtkFileChooserButton.
type FileChooserButton struct {
	Box

	// Interfaces
	FileChooser
}

// native returns a pointer to the underlying GtkFileChooserButton.
func (v *FileChooserButton) native() *C.GtkFileChooserButton {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkFileChooserButton(p)
}

func marshalFileChooserButton(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapFileChooserButton(obj), nil
}

func wrapFileChooserButton(obj *glib.Object) *FileChooserButton {
	if obj == nil {
		return nil
	}

	fc := wrapFileChooser(obj)
	return &FileChooserButton{Box{Container{Widget{glib.InitiallyUnowned{obj}}}}, *fc}
}

// FileChooserButtonNew is a wrapper around gtk_file_chooser_button_new().
func FileChooserButtonNew(title string, action FileChooserAction) (*FileChooserButton, error) {
	cstr := C.CString(title)
	defer C.free(unsafe.Pointer(cstr))
	c := C.gtk_file_chooser_button_new((*C.gchar)(cstr),
		(C.GtkFileChooserAction)(action))
	if c == nil {
		return nil, nilPtrErr
	}
	obj := glib.Take(unsafe.Pointer(c))
	return wrapFileChooserButton(obj), nil
}

// FileChooserButtonNewWithDialog is a wrapper around gtk_file_chooser_button_new_with_dialog().
func FileChooserButtonNewWithDialog(dialog IWidget) (*FileChooserButton, error) {
	c := C.gtk_file_chooser_button_new_with_dialog(dialog.toWidget())
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapFileChooserButton(glib.Take(unsafe.Pointer(c))), nil
}

// GetTitle is a wrapper around gtk_file_chooser_button_get_title().
func (v *FileChooserButton) GetTitle() string {
	// docs say: The returned value should not be modified or freed.
	return goString(C.gtk_file_chooser_button_get_title(v.native()))
}

// SetTitle is a wrapper around gtk_file_chooser_button_set_title().
func (v *FileChooserButton) SetTitle(title string) {
	cstr := C.CString(title)
	defer C.free(unsafe.Pointer(cstr))
	C.gtk_file_chooser_button_set_title(v.native(), (*C.gchar)(cstr))
}

// GetWidthChars is a wrapper around gtk_file_chooser_button_get_width_chars().
func (v *FileChooserButton) GetWidthChars() int {
	return int(C.gtk_file_chooser_button_get_width_chars(v.native()))
}

// SetWidthChars is a wrapper around gtk_file_chooser_button_set_width_chars().
func (v *FileChooserButton) SetWidthChars(width int) {
	C.gtk_file_chooser_button_set_width_chars(v.native(), C.gint(width))
}

/*
 * GtkFileChooserDialog
 */

// FileChooserDialog is a representation of GTK's GtkFileChooserDialog.
type FileChooserDialog struct {
	Dialog

	// Interfaces
	FileChooser
}

// native returns a pointer to the underlying GtkFileChooserDialog.
func (v *FileChooserDialog) native() *C.GtkFileChooserDialog {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkFileChooserDialog(p)
}

func marshalFileChooserDialog(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapFileChooserDialog(obj), nil
}

func wrapFileChooserDialog(obj *glib.Object) *FileChooserDialog {
	if obj == nil {
		return nil
	}

	fc := wrapFileChooser(obj)
	return &FileChooserDialog{Dialog{Window{Bin{Container{Widget{glib.InitiallyUnowned{obj}}}}}}, *fc}
}

// FileChooserDialogNewWith1Button is a wrapper around gtk_file_chooser_dialog_new() with one button.
func FileChooserDialogNewWith1Button(
	title string,
	parent IWindow,
	action FileChooserAction,
	first_button_text string,
	first_button_id ResponseType) (*FileChooserDialog, error) {

	var w *C.GtkWindow = nil
	if parent != nil {
		w = parent.toWindow()
	}

	c_title := C.CString(title)
	defer C.free(unsafe.Pointer(c_title))
	c_first_button_text := C.CString(first_button_text)
	defer C.free(unsafe.Pointer(c_first_button_text))
	c := C.gtk_file_chooser_dialog_new_1(
		(*C.gchar)(c_title), w, C.GtkFileChooserAction(action),
		(*C.gchar)(c_first_button_text), C.int(first_button_id))
	if c == nil {
		return nil, nilPtrErr
	}
	obj := glib.Take(unsafe.Pointer(c))
	return wrapFileChooserDialog(obj), nil
}

// FileChooserDialogNewWith2Buttons is a wrapper around gtk_file_chooser_dialog_new() with two buttons.
func FileChooserDialogNewWith2Buttons(
	title string,
	parent IWindow,
	action FileChooserAction,
	first_button_text string,
	first_button_id ResponseType,
	second_button_text string,
	second_button_id ResponseType) (*FileChooserDialog, error) {

	var w *C.GtkWindow = nil
	if parent != nil {
		w = parent.toWindow()
	}

	c_title := C.CString(title)
	defer C.free(unsafe.Pointer(c_title))
	c_first_button_text := C.CString(first_button_text)
	defer C.free(unsafe.Pointer(c_first_button_text))
	c_second_button_text := C.CString(second_button_text)
	defer C.free(unsafe.Pointer(c_second_button_text))
	c := C.gtk_file_chooser_dialog_new_2(
		(*C.gchar)(c_title), w, C.GtkFileChooserAction(action),
		(*C.gchar)(c_first_button_text), C.int(first_button_id),
		(*C.gchar)(c_second_button_text), C.int(second_button_id))
	if c == nil {
		return nil, nilPtrErr
	}
	obj := glib.Take(unsafe.Pointer(c))
	return wrapFileChooserDialog(obj), nil
}

/*
 * GtkFileChooserWidget
 */

// FileChooserWidget is a representation of GTK's GtkFileChooserWidget.
type FileChooserWidget struct {
	Box

	// Interfaces
	FileChooser
}

// native returns a pointer to the underlying GtkFileChooserWidget.
func (v *FileChooserWidget) native() *C.GtkFileChooserWidget {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkFileChooserWidget(p)
}

func marshalFileChooserWidget(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapFileChooserWidget(obj), nil
}

func wrapFileChooserWidget(obj *glib.Object) *FileChooserWidget {
	if obj == nil {
		return nil
	}

	fc := wrapFileChooser(obj)
	return &FileChooserWidget{Box{Container{Widget{glib.InitiallyUnowned{obj}}}}, *fc}
}

// FileChooserWidgetNew is a wrapper around gtk_file_chooser_widget_new().
func FileChooserWidgetNew(action FileChooserAction) (*FileChooserWidget, error) {
	c := C.gtk_file_chooser_widget_new((C.GtkFileChooserAction)(action))
	if c == nil {
		return nil, nilPtrErr
	}
	obj := glib.Take(unsafe.Pointer(c))
	return wrapFileChooserWidget(obj), nil
}

/*
 * GtkFileFilter
 */

// FileChoser is a representation of GTK's GtkFileFilter GInterface.
type FileFilter struct {
	*glib.Object
}

// native returns a pointer to the underlying GObject as a GtkFileFilter.
func (v *FileFilter) native() *C.GtkFileFilter {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkFileFilter(p)
}

func marshalFileFilter(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapFileFilter(obj), nil
}

func wrapFileFilter(obj *glib.Object) *FileFilter {
	if obj == nil {
		return nil
	}

	return &FileFilter{obj}
}

// FileFilterNew is a wrapper around gtk_file_filter_new().
func FileFilterNew() (*FileFilter, error) {
	c := C.gtk_file_filter_new()
	if c == nil {
		return nil, nilPtrErr
	}
	obj := glib.Take(unsafe.Pointer(c))
	return wrapFileFilter(obj), nil
}

// SetName is a wrapper around gtk_file_filter_set_name().
func (v *FileFilter) SetName(name string) {
	cstr := C.CString(name)
	defer C.free(unsafe.Pointer(cstr))
	C.gtk_file_filter_set_name(v.native(), (*C.gchar)(cstr))
}

// GetName is a wrapper around gtk_file_filter_get_name().
func (v *FileFilter) GetName() (name string) {
	cstr := C.gtk_file_filter_get_name(v.native())
	if cstr != nil {
		name = goString(cstr)
	}
	return
}

// AddMimeType is a wrapper around gtk_file_filter_add_mime_type().
func (v *FileFilter) AddMimeType(mimeType string) {
	cstr := C.CString(mimeType)
	defer C.free(unsafe.Pointer(cstr))
	C.gtk_file_filter_add_mime_type(v.native(), (*C.gchar)(cstr))
}

// AddPattern is a wrapper around gtk_file_filter_add_pattern().
func (v *FileFilter) AddPattern(pattern string) {
	cstr := C.CString(pattern)
	defer C.free(unsafe.Pointer(cstr))
	C.gtk_file_filter_add_pattern(v.native(), (*C.gchar)(cstr))
}

// AddPixbufFormats is a wrapper around gtk_file_filter_add_pixbuf_formats().
func (v *FileFilter) AddPixbufFormats() {
	C.gtk_file_filter_add_pixbuf_formats(v.native())
}

/*
 * GtkFrame
 */

// Frame is a representation of GTK's GtkFrame.
type Frame struct {
	Bin
}

// native returns a pointer to the underlying GtkFrame.
func (v *Frame) native() *C.GtkFrame {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkFrame(p)
}

func marshalFrame(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapFrame(obj), nil
}

func wrapFrame(obj *glib.Object) *Frame {
	if obj == nil {
		return nil
	}

	return &Frame{Bin{Container{Widget{glib.InitiallyUnowned{obj}}}}}
}

// FrameNew is a wrapper around gtk_frame_new().
func FrameNew(label string) (*Frame, error) {
	var cstr *C.char
	if label != "" {
		cstr = C.CString(label)
		defer C.free(unsafe.Pointer(cstr))
	}
	c := C.gtk_frame_new((*C.gchar)(cstr))
	if c == nil {
		return nil, nilPtrErr
	}
	obj := glib.Take(unsafe.Pointer(c))
	return wrapFrame(obj), nil
}

// SetLabel is a wrapper around gtk_frame_set_label().
func (v *Frame) SetLabel(label string) {
	cstr := C.CString(label)
	defer C.free(unsafe.Pointer(cstr))
	C.gtk_frame_set_label(v.native(), (*C.gchar)(cstr))
}

// SetLabelWidget is a wrapper around gtk_frame_set_label_widget().
func (v *Frame) SetLabelWidget(labelWidget IWidget) {
	C.gtk_frame_set_label_widget(v.native(), labelWidget.toWidget())
}

// SetLabelAlign is a wrapper around gtk_frame_set_label_align().
func (v *Frame) SetLabelAlign(xAlign, yAlign float32) {
	C.gtk_frame_set_label_align(v.native(), C.gfloat(xAlign),
		C.gfloat(yAlign))
}

// SetShadowType is a wrapper around gtk_frame_set_shadow_type().
func (v *Frame) SetShadowType(t ShadowType) {
	C.gtk_frame_set_shadow_type(v.native(), C.GtkShadowType(t))
}

// GetLabel is a wrapper around gtk_frame_get_label().
func (v *Frame) GetLabel() string {
	c := C.gtk_frame_get_label(v.native())
	return goString(c)
}

// GetLabelAlign is a wrapper around gtk_frame_get_label_align().
func (v *Frame) GetLabelAlign() (xAlign, yAlign float32) {
	var x, y C.gfloat
	C.gtk_frame_get_label_align(v.native(), &x, &y)
	return float32(x), float32(y)
}

// GetLabelWidget is a wrapper around gtk_frame_get_label_widget().
func (v *Frame) GetLabelWidget() (IWidget, error) {
	c := C.gtk_frame_get_label_widget(v.native())
	if c == nil {
		return nil, nil
	}
	return castWidget(c)
}

// GetShadowType is a wrapper around gtk_frame_get_shadow_type().
func (v *Frame) GetShadowType() ShadowType {
	c := C.gtk_frame_get_shadow_type(v.native())
	return ShadowType(c)
}

/*
 * GtkAspectFrame
 */

// AspectFrame is a representation of GTK's GtkAspectFrame.
type AspectFrame struct {
	Frame
}

// native returns a pointer to the underlying GtkAspectFrame.
func (v *AspectFrame) native() *C.GtkAspectFrame {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkAspectFrame(p)
}

func marshalAspectFrame(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapAspectFrame(obj), nil
}

func wrapAspectFrame(obj *glib.Object) *AspectFrame {
	if obj == nil {
		return nil
	}

	return &AspectFrame{Frame{Bin{Container{Widget{glib.InitiallyUnowned{obj}}}}}}
}

// AspectFrameNew is a wrapper around gtk_aspect_frame_new().
func AspectFrameNew(label string, xalign, yalign, ratio float32, obeyChild bool) (*AspectFrame, error) {
	var cstr *C.char
	if label != "" {
		cstr = C.CString(label)
		defer C.free(unsafe.Pointer(cstr))
	}
	c := C.gtk_aspect_frame_new((*C.gchar)(cstr), (C.gfloat)(xalign), (C.gfloat)(yalign), (C.gfloat)(ratio), gbool(obeyChild))
	if c == nil {
		return nil, nilPtrErr
	}
	obj := glib.Take(unsafe.Pointer(c))
	return wrapAspectFrame(obj), nil
}

// TODO:
// gtk_aspect_frame_set().

/*
 * GtkGrid
 */

// Grid is a representation of GTK's GtkGrid.
type Grid struct {
	Container

	// Interfaces
	Orientable
}

// native returns a pointer to the underlying GtkGrid.
func (v *Grid) native() *C.GtkGrid {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkGrid(p)
}

func (v *Grid) toOrientable() *C.GtkOrientable {
	if v == nil {
		return nil
	}
	return C.toGtkOrientable(unsafe.Pointer(v.GObject))
}

func marshalGrid(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapGrid(obj), nil
}

func wrapGrid(obj *glib.Object) *Grid {
	if obj == nil {
		return nil
	}

	o := wrapOrientable(obj)
	return &Grid{Container{Widget{glib.InitiallyUnowned{obj}}}, *o}
}

// GridNew() is a wrapper around gtk_grid_new().
func GridNew() (*Grid, error) {
	c := C.gtk_grid_new()
	if c == nil {
		return nil, nilPtrErr
	}
	obj := glib.Take(unsafe.Pointer(c))
	return wrapGrid(obj), nil
}

// Attach() is a wrapper around gtk_grid_attach().
func (v *Grid) Attach(child IWidget, left, top, width, height int) {
	C.gtk_grid_attach(v.native(), child.toWidget(), C.gint(left),
		C.gint(top), C.gint(width), C.gint(height))
}

// AttachNextTo() is a wrapper around gtk_grid_attach_next_to().
func (v *Grid) AttachNextTo(child, sibling IWidget, side PositionType, width, height int) {
	C.gtk_grid_attach_next_to(v.native(), child.toWidget(),
		sibling.toWidget(), C.GtkPositionType(side), C.gint(width),
		C.gint(height))
}

// GetChildAt() is a wrapper around gtk_grid_get_child_at().
func (v *Grid) GetChildAt(left, top int) (IWidget, error) {
	c := C.gtk_grid_get_child_at(v.native(), C.gint(left), C.gint(top))
	if c == nil {
		return nil, nil
	}
	return castWidget(c)
}

// InsertRow() is a wrapper around gtk_grid_insert_row().
func (v *Grid) InsertRow(position int) {
	C.gtk_grid_insert_row(v.native(), C.gint(position))
}

// InsertColumn() is a wrapper around gtk_grid_insert_column().
func (v *Grid) InsertColumn(position int) {
	C.gtk_grid_insert_column(v.native(), C.gint(position))
}

// InsertNextTo() is a wrapper around gtk_grid_insert_next_to()
func (v *Grid) InsertNextTo(sibling IWidget, side PositionType) {
	C.gtk_grid_insert_next_to(v.native(), sibling.toWidget(),
		C.GtkPositionType(side))
}

// SetRowHomogeneous() is a wrapper around gtk_grid_set_row_homogeneous().
func (v *Grid) SetRowHomogeneous(homogeneous bool) {
	C.gtk_grid_set_row_homogeneous(v.native(), gbool(homogeneous))
}

// GetRowHomogeneous() is a wrapper around gtk_grid_get_row_homogeneous().
func (v *Grid) GetRowHomogeneous() bool {
	c := C.gtk_grid_get_row_homogeneous(v.native())
	return gobool(c)
}

// SetRowSpacing() is a wrapper around gtk_grid_set_row_spacing().
func (v *Grid) SetRowSpacing(spacing uint) {
	C.gtk_grid_set_row_spacing(v.native(), C.guint(spacing))
}

// GetRowSpacing() is a wrapper around gtk_grid_get_row_spacing().
func (v *Grid) GetRowSpacing() uint {
	c := C.gtk_grid_get_row_spacing(v.native())
	return uint(c)
}

// SetColumnHomogeneous() is a wrapper around gtk_grid_set_column_homogeneous().
func (v *Grid) SetColumnHomogeneous(homogeneous bool) {
	C.gtk_grid_set_column_homogeneous(v.native(), gbool(homogeneous))
}

// GetColumnHomogeneous() is a wrapper around gtk_grid_get_column_homogeneous().
func (v *Grid) GetColumnHomogeneous() bool {
	c := C.gtk_grid_get_column_homogeneous(v.native())
	return gobool(c)
}

// SetColumnSpacing() is a wrapper around gtk_grid_set_column_spacing().
func (v *Grid) SetColumnSpacing(spacing uint) {
	C.gtk_grid_set_column_spacing(v.native(), C.guint(spacing))
}

// GetColumnSpacing() is a wrapper around gtk_grid_get_column_spacing().
func (v *Grid) GetColumnSpacing() uint {
	c := C.gtk_grid_get_column_spacing(v.native())
	return uint(c)
}

/*
 * GtkIconTheme
 */

// IconTheme is a representation of GTK's GtkIconTheme
type IconTheme struct {
	Theme *C.GtkIconTheme
}

// IconThemeNew is a wrapper around gtk_icon_theme_new().
func IconThemeNew() (*IconTheme, error) {
	c := C.gtk_icon_theme_new()
	if c == nil {
		return nil, nilPtrErr
	}
	return &IconTheme{c}, nil
}

// IconThemeGetDefault is a wrapper around gtk_icon_theme_get_default().
func IconThemeGetDefault() (*IconTheme, error) {
	c := C.gtk_icon_theme_get_default()
	if c == nil {
		return nil, nilPtrErr
	}
	return &IconTheme{c}, nil
}

// IconThemeGetForScreen is a wrapper around gtk_icon_theme_get_for_screen().
func IconThemeGetForScreen(screen gdk.Screen) (*IconTheme, error) {
	cScreen := (*C.GdkScreen)(unsafe.Pointer(screen.Native()))
	c := C.gtk_icon_theme_get_for_screen(cScreen)
	if c == nil {
		return nil, nilPtrErr
	}
	return &IconTheme{c}, nil
}

// LoadIcon is a wrapper around gtk_icon_theme_load_icon().
func (v *IconTheme) LoadIcon(iconName string, size int, flags IconLookupFlags) (*gdk.Pixbuf, error) {
	cstr := C.CString(iconName)
	defer C.free(unsafe.Pointer(cstr))
	var err *C.GError = nil
	c := C.gtk_icon_theme_load_icon(v.Theme, (*C.gchar)(cstr), C.gint(size), C.GtkIconLookupFlags(flags), &err)
	if c == nil {
		defer C.g_error_free(err)
		return nil, errors.New(goString(err.message))
	}
	return &gdk.Pixbuf{glib.Take(unsafe.Pointer(c))}, nil
}

// HasIcon is a wrapper around gtk_icon_theme_has_icon().
func (v *IconTheme) HasIcon(iconName string) bool {
	cstr := C.CString(iconName)
	defer C.free(unsafe.Pointer(cstr))

	c := C.gtk_icon_theme_has_icon(v.Theme, (*C.gchar)(cstr))
	return gobool(c)
}

// AddResourcePath is a wrapper around gtk_icon_theme_add_resource_path().
func (v *IconTheme) AddResourcePath(path string) {
	cstr := C.CString(path)
	defer C.free(unsafe.Pointer(cstr))

	C.gtk_icon_theme_add_resource_path(v.Theme, (*C.gchar)(cstr))
}

// AppendSearchPath is a wrapper around gtk_icon_theme_append_search_path().
func (v *IconTheme) AppendSearchPath(path string) {
	cstr := C.CString(path)
	defer C.free(unsafe.Pointer(cstr))

	C.gtk_icon_theme_append_search_path(v.Theme, (*C.gchar)(cstr))
}

/*
 * GtkImage
 */

// Image is a representation of GTK's GtkImage.
type Image struct {
	Widget
}

// native returns a pointer to the underlying GtkImage.
func (v *Image) native() *C.GtkImage {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkImage(p)
}

func marshalImage(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapImage(obj), nil
}

func wrapImage(obj *glib.Object) *Image {
	if obj == nil {
		return nil
	}

	return &Image{Widget{glib.InitiallyUnowned{obj}}}
}

// ImageNew() is a wrapper around gtk_image_new().
func ImageNew() (*Image, error) {
	c := C.gtk_image_new()
	if c == nil {
		return nil, nilPtrErr
	}
	obj := glib.Take(unsafe.Pointer(c))
	return wrapImage(obj), nil
}

// ImageNewFromFile() is a wrapper around gtk_image_new_from_file().
func ImageNewFromFile(filename string) (*Image, error) {
	cstr := C.CString(filename)
	defer C.free(unsafe.Pointer(cstr))
	c := C.gtk_image_new_from_file((*C.gchar)(cstr))
	if c == nil {
		return nil, nilPtrErr
	}
	obj := glib.Take(unsafe.Pointer(c))
	return wrapImage(obj), nil
}

// ImageNewFromResource() is a wrapper around gtk_image_new_from_resource().
func ImageNewFromResource(resourcePath string) (*Image, error) {
	cstr := C.CString(resourcePath)
	defer C.free(unsafe.Pointer(cstr))
	c := C.gtk_image_new_from_resource((*C.gchar)(cstr))
	if c == nil {
		return nil, nilPtrErr
	}
	obj := glib.Take(unsafe.Pointer(c))
	return wrapImage(obj), nil
}

// ImageNewFromPixbuf is a wrapper around gtk_image_new_from_pixbuf().
func ImageNewFromPixbuf(pixbuf *gdk.Pixbuf) (*Image, error) {
	c := C.gtk_image_new_from_pixbuf((*C.GdkPixbuf)(pixbuf.NativePrivate()))
	if c == nil {
		return nil, nilPtrErr
	}
	obj := glib.Take(unsafe.Pointer(c))
	return wrapImage(obj), nil
}

// ImageNewFromIconName() is a wrapper around gtk_image_new_from_icon_name().
func ImageNewFromIconName(iconName string, size IconSize) (*Image, error) {
	cstr := C.CString(iconName)
	defer C.free(unsafe.Pointer(cstr))
	c := C.gtk_image_new_from_icon_name((*C.gchar)(cstr),
		C.GtkIconSize(size))
	if c == nil {
		return nil, nilPtrErr
	}
	obj := glib.Take(unsafe.Pointer(c))
	return wrapImage(obj), nil
}

// ImageNewFromGIcon is a wrapper around gtk_image_new_from_gicon()
func ImageNewFromGIcon(icon *glib.Icon, size IconSize) (*Image, error) {
	c := C.gtk_image_new_from_gicon(
		(*C.GIcon)(icon.NativePrivate()),
		C.GtkIconSize(size))

	if c == nil {
		return nil, nilPtrErr
	}
	obj := glib.Take(unsafe.Pointer(c))
	return wrapImage(obj), nil
}

// Clear() is a wrapper around gtk_image_clear().
func (v *Image) Clear() {
	C.gtk_image_clear(v.native())
}

// SetFromFile() is a wrapper around gtk_image_set_from_file().
func (v *Image) SetFromFile(filename string) {
	cstr := C.CString(filename)
	defer C.free(unsafe.Pointer(cstr))
	C.gtk_image_set_from_file(v.native(), (*C.gchar)(cstr))
}

// SetFromResource() is a wrapper around gtk_image_set_from_resource().
func (v *Image) SetFromResource(resourcePath string) {
	cstr := C.CString(resourcePath)
	defer C.free(unsafe.Pointer(cstr))
	C.gtk_image_set_from_resource(v.native(), (*C.gchar)(cstr))
}

// SetFromFixbuf is a wrapper around gtk_image_set_from_pixbuf().
func (v *Image) SetFromPixbuf(pixbuf *gdk.Pixbuf) {
	pbptr := (*C.GdkPixbuf)(unsafe.Pointer(pixbuf.Native()))
	C.gtk_image_set_from_pixbuf(v.native(), pbptr)
}

// SetFromIconName() is a wrapper around gtk_image_set_from_icon_name().
func (v *Image) SetFromIconName(iconName string, size IconSize) {
	cstr := C.CString(iconName)
	defer C.free(unsafe.Pointer(cstr))
	C.gtk_image_set_from_icon_name(v.native(), (*C.gchar)(cstr),
		C.GtkIconSize(size))
}

// SetFromGIcon is a wrapper around gtk_image_set_from_gicon()
func (v *Image) SetFromGIcon(icon *glib.Icon, size IconSize) {
	C.gtk_image_set_from_gicon(
		v.native(),
		(*C.GIcon)(icon.NativePrivate()),
		C.GtkIconSize(size))
}

// SetPixelSize() is a wrapper around gtk_image_set_pixel_size().
func (v *Image) SetPixelSize(pixelSize int) {
	C.gtk_image_set_pixel_size(v.native(), C.gint(pixelSize))
}

// GetStorageType() is a wrapper around gtk_image_get_storage_type().
func (v *Image) GetStorageType() ImageType {
	c := C.gtk_image_get_storage_type(v.native())
	return ImageType(c)
}

// GetPixbuf() is a wrapper around gtk_image_get_pixbuf().
func (v *Image) GetPixbuf() *gdk.Pixbuf {
	c := C.gtk_image_get_pixbuf(v.native())
	if c == nil {
		return nil
	}

	pb := &gdk.Pixbuf{glib.Take(unsafe.Pointer(c))}
	return pb
}

// GetAnimation() is a wrapper around gtk_image_get_animation()
func (v *Image) GetAnimation() *gdk.PixbufAnimation {
	c := C.gtk_image_get_animation(v.native())
	if c == nil {
		return nil
	}
	return &gdk.PixbufAnimation{glib.Take(unsafe.Pointer(c))}
}

// ImageNewFromAnimation() is a wrapper around gtk_image_new_from_animation()
func ImageNewFromAnimation(animation *gdk.PixbufAnimation) (*Image, error) {
	c := C.gtk_image_new_from_animation((*C.GdkPixbufAnimation)(animation.NativePrivate()))
	if c == nil {
		return nil, nilPtrErr
	}
	obj := glib.Take(unsafe.Pointer(c))
	return wrapImage(obj), nil
}

// SetFromAnimation is a wrapper around gtk_image_set_from_animation().
func (v *Image) SetFromAnimation(animation *gdk.PixbufAnimation) {
	pbaptr := (*C.GdkPixbufAnimation)(unsafe.Pointer(animation.NativePrivate()))
	C.gtk_image_set_from_animation(v.native(), pbaptr)
}

// GetIconName() is a wrapper around gtk_image_get_icon_name().
func (v *Image) GetIconName() (string, IconSize) {
	var iconName *C.gchar
	var size C.GtkIconSize
	C.gtk_image_get_icon_name(v.native(), &iconName, &size)
	return goString(iconName), IconSize(size)
}

// GetGIcon is a wrapper around gtk_image_get_gicon()
func (v *Image) GetGIcon() (*glib.Icon, IconSize, error) {
	var gicon *C.GIcon
	var size *C.GtkIconSize
	C.gtk_image_get_gicon(
		v.native(),
		&gicon,
		size)

	if gicon == nil {
		return nil, ICON_SIZE_INVALID, nilPtrErr
	}

	obj := &glib.Object{glib.ToGObject(unsafe.Pointer(gicon))}
	i := &glib.Icon{obj}

	runtime.SetFinalizer(i, func(_ interface{}) { glib.FinalizerStrategy(obj.Unref) })
	return i, IconSize(*size), nil
}

// GetPixelSize() is a wrapper around gtk_image_get_pixel_size().
func (v *Image) GetPixelSize() int {
	c := C.gtk_image_get_pixel_size(v.native())
	return int(c)
}

// added by terrak
/*
 * GtkLayout
 */

// Layout is a representation of GTK's GtkLayout.
type Layout struct {
	Container
}

// native returns a pointer to the underlying GtkDrawingArea.
func (v *Layout) native() *C.GtkLayout {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkLayout(p)
}

func marshalLayout(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapLayout(obj), nil
}

func wrapLayout(obj *glib.Object) *Layout {
	if obj == nil {
		return nil
	}

	return &Layout{Container{Widget{glib.InitiallyUnowned{obj}}}}
}

// LayoutNew is a wrapper around gtk_layout_new().
func LayoutNew(hadjustment, vadjustment *Adjustment) (*Layout, error) {
	c := C.gtk_layout_new(hadjustment.native(), vadjustment.native())
	if c == nil {
		return nil, nilPtrErr
	}
	obj := glib.Take(unsafe.Pointer(c))
	return wrapLayout(obj), nil
}

// Layout.Put is a wrapper around gtk_layout_put().
func (v *Layout) Put(w IWidget, x, y int) {
	C.gtk_layout_put(v.native(), w.toWidget(), C.gint(x), C.gint(y))
}

// Layout.Move is a wrapper around gtk_layout_move().
func (v *Layout) Move(w IWidget, x, y int) {
	C.gtk_layout_move(v.native(), w.toWidget(), C.gint(x), C.gint(y))
}

// Layout.SetSize is a wrapper around gtk_layout_set_size
func (v *Layout) SetSize(width, height uint) {
	C.gtk_layout_set_size(v.native(), C.guint(width), C.guint(height))
}

// Layout.GetSize is a wrapper around gtk_layout_get_size
func (v *Layout) GetSize() (width, height uint) {
	var w, h C.guint
	C.gtk_layout_get_size(v.native(), &w, &h)
	return uint(w), uint(h)
}

// TODO:
// gtk_layout_get_bin_window().

/*
 * GtkLinkButton
 */

// LinkButton is a representation of GTK's GtkLinkButton.
type LinkButton struct {
	Button
}

// native returns a pointer to the underlying GtkLinkButton.
func (v *LinkButton) native() *C.GtkLinkButton {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkLinkButton(p)
}

func marshalLinkButton(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapLinkButton(obj), nil
}

func wrapLinkButton(obj *glib.Object) *LinkButton {
	if obj == nil {
		return nil
	}

	actionable := wrapActionable(obj)
	return &LinkButton{Button{Bin{Container{Widget{
		glib.InitiallyUnowned{obj}}}}, actionable}}
}

// LinkButtonNew is a wrapper around gtk_link_button_new().
func LinkButtonNew(label string) (*LinkButton, error) {
	cstr := C.CString(label)
	defer C.free(unsafe.Pointer(cstr))
	c := C.gtk_link_button_new((*C.gchar)(cstr))
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapLinkButton(glib.Take(unsafe.Pointer(c))), nil
}

// LinkButtonNewWithLabel is a wrapper around gtk_link_button_new_with_label().
func LinkButtonNewWithLabel(uri, label string) (*LinkButton, error) {
	curi := C.CString(uri)
	defer C.free(unsafe.Pointer(curi))
	clabel := C.CString(label)
	defer C.free(unsafe.Pointer(clabel))
	c := C.gtk_link_button_new_with_label((*C.gchar)(curi), (*C.gchar)(clabel))
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapLinkButton(glib.Take(unsafe.Pointer(c))), nil
}

// GetUri is a wrapper around gtk_link_button_get_uri().
func (v *LinkButton) GetUri() string {
	c := C.gtk_link_button_get_uri(v.native())
	return goString(c)
}

// SetUri is a wrapper around gtk_link_button_set_uri().
func (v *LinkButton) SetUri(uri string) {
	cstr := C.CString(uri)
	C.gtk_link_button_set_uri(v.native(), (*C.gchar)(cstr))
}

// GetVisited is a wrapper around gtk_link_button_get_visited().
func (v *LinkButton) GetVisited() bool {
	c := C.gtk_link_button_get_visited(v.native())
	return gobool(c)
}

// SetVisited is a wrapper around gtk_link_button_set_visited().
func (v *LinkButton) SetVisited(visited bool) {
	C.gtk_link_button_set_visited(v.native(), gbool(visited))
}

/*
 * GtkLockButton
 */

// LockButton is a representation of GTK's GtkLockButton.
type LockButton struct {
	Button
}

// native returns a pointer to the underlying GtkLockButton.
func (v *LockButton) native() *C.GtkLockButton {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkLockButton(p)
}

func marshalLockButton(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapLockButton(obj), nil
}

func wrapLockButton(obj *glib.Object) *LockButton {
	if obj == nil {
		return nil
	}

	actionable := wrapActionable(obj)
	return &LockButton{Button{Bin{Container{Widget{
		glib.InitiallyUnowned{obj}}}}, actionable}}
}

// LockButtonNew is a wrapper around gtk_lock_button_new().
func LockButtonNew(permission *glib.Permission) (*LockButton, error) {
	c := C.gtk_lock_button_new(nativeGPermission(permission))
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapLockButton(glib.Take(unsafe.Pointer(c))), nil
}

// GetPermission is a wrapper around gtk_lock_button_get_permission().
func (v *LockButton) GetPermission() *glib.Permission {
	c := C.gtk_lock_button_get_permission(v.native())
	return glib.WrapPermission(unsafe.Pointer(c))
}

// SetPermission is a wrapper around gtk_lock_button_set_permission().
func (v *LockButton) SetPermission(permission *glib.Permission) {
	C.gtk_lock_button_set_permission(v.native(), nativeGPermission(permission))
}

/*
 * GtkListStore
 */

// ListStore is a representation of GTK's GtkListStore.
type ListStore struct {
	*glib.Object

	// Interfaces
	TreeModel
	TreeSortable
}

// native returns a pointer to the underlying GtkListStore.
func (v *ListStore) native() *C.GtkListStore {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkListStore(p)
}

func marshalListStore(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapListStore(obj), nil
}

func wrapListStore(obj *glib.Object) *ListStore {
	if obj == nil {
		return nil
	}

	tm := wrapTreeModel(obj)
	ts := wrapTreeSortable(obj)
	return &ListStore{obj, *tm, *ts}
}

func (v *ListStore) toTreeModel() *C.GtkTreeModel {
	if v == nil {
		return nil
	}
	return C.toGtkTreeModel(unsafe.Pointer(v.GObject))
}

func (v *ListStore) toTreeSortable() *C.GtkTreeSortable {
	if v == nil {
		return nil
	}
	return C.toGtkTreeSortable(unsafe.Pointer(v.GObject))
}

// ListStoreNew is a wrapper around gtk_list_store_newv().
func ListStoreNew(types ...glib.Type) (*ListStore, error) {
	gtypes := C.alloc_types(C.int(len(types)))
	for n, val := range types {
		C.set_type(gtypes, C.int(n), C.GType(val))
	}
	defer C.g_free(C.gpointer(gtypes))
	c := C.gtk_list_store_newv(C.gint(len(types)), gtypes)
	if c == nil {
		return nil, nilPtrErr
	}

	ls := wrapListStore(glib.Take(unsafe.Pointer(c)))
	return ls, nil
}

// Remove is a wrapper around gtk_list_store_remove().
func (v *ListStore) Remove(iter *TreeIter) bool {
	c := C.gtk_list_store_remove(v.native(), iter.native())
	return gobool(c)
}

// SetColumnTypes is a wrapper around gtk_list_store_set_column_types().
// The size of glib.Type must match the number of columns
func (v *ListStore) SetColumnTypes(types ...glib.Type) {
	gtypes := C.alloc_types(C.int(len(types)))
	for n, val := range types {
		C.set_type(gtypes, C.int(n), C.GType(val))
	}
	defer C.g_free(C.gpointer(gtypes))
	C.gtk_list_store_set_column_types(v.native(), C.gint(len(types)), gtypes)
}

// Set() is a wrapper around gtk_list_store_set_value() but provides
// a function similar to gtk_list_store_set() in that multiple columns
// may be set by one call.  The length of columns and values slices must
// match, or Set() will return a non-nil error.
//
// As an example, a call to:
//
//	store.Set(iter, []int{0, 1}, []interface{}{"Foo", "Bar"})
//
// is functionally equivalent to calling the native C GTK function:
//
//	gtk_list_store_set(store, iter, 0, "Foo", 1, "Bar", -1);
func (v *ListStore) Set(iter *TreeIter, columns []int, values []interface{}) error {
	if len(columns) != len(values) {
		return errors.New("columns and values lengths do not match")
	}
	for i, val := range values {
		v.SetValue(iter, columns[i], val)
	}
	return nil
}

// SetValue is a wrapper around gtk_list_store_set_value().
func (v *ListStore) SetValue(iter *TreeIter, column int, value interface{}) error {
	switch value.(type) {
	case *gdk.Pixbuf:
		pix := value.(*gdk.Pixbuf)
		C._gtk_list_store_set(v.native(), iter.native(), C.gint(column), unsafe.Pointer(pix.Native()))

	default:
		gv, err := glib.GValue(value)
		if err != nil {
			return err
		}

		C.gtk_list_store_set_value(v.native(), iter.native(),
			C.gint(column),
			(*C.GValue)(unsafe.Pointer(gv.Native())))
	}

	return nil
}

// func (v *ListStore) Model(model ITreeModel) {
// 	obj := &glib.Object{glib.ToGObject(unsafe.Pointer(model.toTreeModel()))}
//	v.TreeModel = *wrapTreeModel(obj)
//}

func (v *ListStore) SetCols(iter *TreeIter, cols Cols) error {
	for key, value := range cols {
		err := v.SetValue(iter, key, value)
		if err != nil {
			return err
		}
	}
	return nil
}

// Convenient map for Columns and values (See ListStore, TreeStore)
type Cols map[int]interface{}

// InsertWithValues() is a wrapper around gtk_list_store_insert_with_valuesv().
func (v *ListStore) InsertWithValues(iter *TreeIter, position int, inColumns []int, inValues []interface{}) error {
	length := len(inColumns)
	if len(inValues) < length {
		length = len(inValues)
	}

	var cColumns []C.gint
	var cValues []C.GValue
	for i := 0; i < length; i++ {
		cColumns = append(cColumns, C.gint(inColumns[i]))

		gv, err := glib.GValue(inValues[i])
		if err != nil {
			return err
		}

		var cvp *C.GValue = (*C.GValue)(unsafe.Pointer(gv.Native()))
		cValues = append(cValues, *cvp)
	}
	var cColumnsPointer *C.gint
	if len(cColumns) > 0 {
		cColumnsPointer = &cColumns[0]
	}
	var cValuesPointer *C.GValue
	if len(cValues) > 0 {
		cValuesPointer = &cValues[0]
	}

	C.gtk_list_store_insert_with_valuesv(v.native(), iter.native(), C.gint(position), cColumnsPointer, cValuesPointer, C.gint(length))

	return nil
}

// Insert() is a wrapper around gtk_list_store_insert().
func (v *ListStore) Insert(position int) *TreeIter {
	var ti C.GtkTreeIter
	C.gtk_list_store_insert(v.native(), &ti, C.gint(position))
	iter := &TreeIter{ti}
	return iter
}

// InsertBefore() is a wrapper around gtk_list_store_insert_before().
func (v *ListStore) InsertBefore(sibling *TreeIter) *TreeIter {
	var ti C.GtkTreeIter
	C.gtk_list_store_insert_before(v.native(), &ti, sibling.native())
	iter := &TreeIter{ti}
	return iter
}

// InsertAfter() is a wrapper around gtk_list_store_insert_after().
func (v *ListStore) InsertAfter(sibling *TreeIter) *TreeIter {
	var ti C.GtkTreeIter
	C.gtk_list_store_insert_after(v.native(), &ti, sibling.native())
	iter := &TreeIter{ti}
	return iter
}

// Prepend() is a wrapper around gtk_list_store_prepend().
func (v *ListStore) Prepend() *TreeIter {
	var ti C.GtkTreeIter
	C.gtk_list_store_prepend(v.native(), &ti)
	iter := &TreeIter{ti}
	return iter
}

// Append() is a wrapper around gtk_list_store_append().
func (v *ListStore) Append() *TreeIter {
	var ti C.GtkTreeIter
	C.gtk_list_store_append(v.native(), &ti)
	iter := &TreeIter{ti}
	return iter
}

// Clear() is a wrapper around gtk_list_store_clear().
func (v *ListStore) Clear() {
	C.gtk_list_store_clear(v.native())
}

// IterIsValid() is a wrapper around gtk_list_store_iter_is_valid().
func (v *ListStore) IterIsValid(iter *TreeIter) bool {
	c := C.gtk_list_store_iter_is_valid(v.native(), iter.native())
	return gobool(c)
}

// TODO(jrick)
/*
func (v *ListStore) Reorder(newOrder []int) {
}
*/

// Swap() is a wrapper around gtk_list_store_swap().
func (v *ListStore) Swap(a, b *TreeIter) {
	C.gtk_list_store_swap(v.native(), a.native(), b.native())
}

// MoveBefore() is a wrapper around gtk_list_store_move_before().
func (v *ListStore) MoveBefore(iter, position *TreeIter) {
	C.gtk_list_store_move_before(v.native(), iter.native(),
		position.native())
}

// MoveAfter() is a wrapper around gtk_list_store_move_after().
func (v *ListStore) MoveAfter(iter, position *TreeIter) {
	C.gtk_list_store_move_after(v.native(), iter.native(),
		position.native())
}

/*
 * GtkMenuBar
 */

// MenuBar is a representation of GTK's GtkMenuBar.
type MenuBar struct {
	MenuShell
}

// native() returns a pointer to the underlying GtkMenuBar.
func (v *MenuBar) native() *C.GtkMenuBar {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkMenuBar(p)
}

func marshalMenuBar(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapMenuBar(obj), nil
}

func wrapMenuBar(obj *glib.Object) *MenuBar {
	if obj == nil {
		return nil
	}

	return &MenuBar{MenuShell{Container{Widget{glib.InitiallyUnowned{obj}}}}}
}

// MenuBarNew() is a wrapper around gtk_menu_bar_new().
func MenuBarNew() (*MenuBar, error) {
	c := C.gtk_menu_bar_new()
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapMenuBar(glib.Take(unsafe.Pointer(c))), nil
}

/*
 * GtkMenuButton
 */

// MenuButton is a representation of GTK's GtkMenuButton.
type MenuButton struct {
	ToggleButton
}

// native returns a pointer to the underlying GtkMenuButton.
func (v *MenuButton) native() *C.GtkMenuButton {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkMenuButton(p)
}

func marshalMenuButton(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapMenuButton(obj), nil
}

func wrapMenuButton(obj *glib.Object) *MenuButton {
	if obj == nil {
		return nil
	}

	actionable := wrapActionable(obj)
	return &MenuButton{ToggleButton{Button{Bin{Container{Widget{
		glib.InitiallyUnowned{obj}}}}, actionable}}}
}

// MenuButtonNew is a wrapper around gtk_menu_button_new().
func MenuButtonNew() (*MenuButton, error) {
	c := C.gtk_menu_button_new()
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapMenuButton(glib.Take(unsafe.Pointer(c))), nil
}

// SetPopup is a wrapper around gtk_menu_button_set_popup().
func (v *MenuButton) SetPopup(menu IMenu) {
	C.gtk_menu_button_set_popup(v.native(), menu.toWidget())
}

// GetPopup is a wrapper around gtk_menu_button_get_popup().
func (v *MenuButton) GetPopup() *Menu {
	c := C.gtk_menu_button_get_popup(v.native())
	if c == nil {
		return nil
	}
	return wrapMenu(glib.Take(unsafe.Pointer(c)))
}

// SetMenuModel is a wrapper around gtk_menu_button_set_menu_model().
func (v *MenuButton) SetMenuModel(menuModel *glib.MenuModel) {
	C.gtk_menu_button_set_menu_model(v.native(), C.toGMenuModel(unsafe.Pointer(menuModel.Native())))
}

// GetMenuModel is a wrapper around gtk_menu_button_get_menu_model().
func (v *MenuButton) GetMenuModel() *glib.MenuModel {
	c := C.gtk_menu_button_get_menu_model(v.native())
	if c == nil {
		return nil
	}
	return &glib.MenuModel{glib.Take(unsafe.Pointer(c))}
}

// SetDirection is a wrapper around gtk_menu_button_set_direction().
func (v *MenuButton) SetDirection(direction ArrowType) {
	C.gtk_menu_button_set_direction(v.native(), C.GtkArrowType(direction))
}

// GetDirection is a wrapper around gtk_menu_button_get_direction().
func (v *MenuButton) GetDirection() ArrowType {
	c := C.gtk_menu_button_get_direction(v.native())
	return ArrowType(c)
}

// SetAlignWidget is a wrapper around gtk_menu_button_set_align_widget().
func (v *MenuButton) SetAlignWidget(alignWidget IWidget) {
	C.gtk_menu_button_set_align_widget(v.native(), alignWidget.toWidget())
}

// GetAlignWidget is a wrapper around gtk_menu_button_get_align_widget().
func (v *MenuButton) GetAlignWidget() (IWidget, error) {
	c := C.gtk_menu_button_get_align_widget(v.native())
	if c == nil {
		return nil, nil
	}
	return castWidget(c)
}

/*
 * GtkMenuItem
 */

// MenuItem is a representation of GTK's GtkMenuItem.
type MenuItem struct {
	Bin
}

// IMenuItem is an interface type implemented by all structs
// embedding a MenuItem.  It is meant to be used as an argument type
// for wrapper functions that wrap around a C GTK function taking a
// GtkMenuItem.
type IMenuItem interface {
	toMenuItem() *C.GtkMenuItem
	toWidget() *C.GtkWidget
}

// native returns a pointer to the underlying GtkMenuItem.
func (v *MenuItem) native() *C.GtkMenuItem {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkMenuItem(p)
}

func (v *MenuItem) toMenuItem() *C.GtkMenuItem {
	if v == nil {
		return nil
	}
	return v.native()
}

func marshalMenuItem(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapMenuItem(obj), nil
}

func wrapMenuItem(obj *glib.Object) *MenuItem {
	if obj == nil {
		return nil
	}

	return &MenuItem{Bin{Container{Widget{glib.InitiallyUnowned{obj}}}}}
}

// MenuItemNew() is a wrapper around gtk_menu_item_new().
func MenuItemNew() (*MenuItem, error) {
	c := C.gtk_menu_item_new()
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapMenuItem(glib.Take(unsafe.Pointer(c))), nil
}

// MenuItemNewWithLabel() is a wrapper around gtk_menu_item_new_with_label().
func MenuItemNewWithLabel(label string) (*MenuItem, error) {
	cstr := C.CString(label)
	defer C.free(unsafe.Pointer(cstr))
	c := C.gtk_menu_item_new_with_label((*C.gchar)(cstr))
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapMenuItem(glib.Take(unsafe.Pointer(c))), nil
}

// MenuItemNewWithMnemonic() is a wrapper around gtk_menu_item_new_with_mnemonic().
func MenuItemNewWithMnemonic(label string) (*MenuItem, error) {
	cstr := C.CString(label)
	defer C.free(unsafe.Pointer(cstr))
	c := C.gtk_menu_item_new_with_mnemonic((*C.gchar)(cstr))
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapMenuItem(glib.Take(unsafe.Pointer(c))), nil
}

// SetSubmenu() is a wrapper around gtk_menu_item_set_submenu().
func (v *MenuItem) SetSubmenu(submenu IWidget) {
	C.gtk_menu_item_set_submenu(v.native(), submenu.toWidget())
}

// GetSubmenu is a wrapper around gtk_menu_item_get_submenu().
func (v *MenuItem) GetSubmenu() (IMenu, error) {
	c := C.gtk_menu_item_get_submenu(v.native())
	if c == nil {
		return nil, nilPtrErr
	}
	obj := glib.Take(unsafe.Pointer(c))
	return wrapMenu(obj), nil
}

// SetLabel is a wrapper around gtk_menu_item_set_label().
func (v *MenuItem) SetLabel(label string) {
	cstr := C.CString(label)
	defer C.free(unsafe.Pointer(cstr))
	C.gtk_menu_item_set_label(v.native(), (*C.gchar)(cstr))
}

// GetLabel is a wrapper around gtk_menu_item_get_label().
func (v *MenuItem) GetLabel() string {
	l := C.gtk_menu_item_get_label(v.native())
	return goString(l)
}

// SetUseUnderline() is a wrapper around gtk_menu_item_set_use_underline()
func (v *MenuItem) SetUseUnderline(settings bool) {
	C.gtk_menu_item_set_use_underline(v.native(), gbool(settings))
}

// GetUseUnderline() is a wrapper around gtk_menu_item_get_use_underline()
func (v *MenuItem) GetUseUnderline() bool {
	c := C.gtk_menu_item_get_use_underline(v.native())
	return gobool(c)
}

// Select is a wrapper around gtk_menu_item_select()
func (v *MenuItem) Select() {
	C.gtk_menu_item_select(v.native())
}

// Deselect is a wrapper around gtk_menu_item_deselect()
func (v *MenuItem) Deselect() {
	C.gtk_menu_item_deselect(v.native())
}

// Activate is a wrapper around gtk_menu_item_activate()
func (v *MenuItem) Activate() {
	C.gtk_menu_item_activate(v.native())
}

// ToggleSizeRequest is a wrapper around gtk_menu_item_toggle_size_request()
func (v *MenuItem) ToggleSizeRequest(requisition int) int {
	cint := new(C.gint)
	*cint = C.gint(requisition)
	C.gtk_menu_item_toggle_size_request(v.native(), cint)
	return int(*cint)
}

// ToggleSizeAllocate is a wrapper around gtk_menu_item_toggle_size_allocate()
func (v *MenuItem) ToggleSizeAllocate(allocation int) {
	C.gtk_menu_item_toggle_size_allocate(v.native(), C.gint(allocation))
}

// GetReserveIndicator is a wrapper around gtk_menu_item_get_reserve_indicator().
func (v *MenuItem) GetReserveIndicator() bool {
	return gobool(C.gtk_menu_item_get_reserve_indicator(v.native()))
}

// SetReserveIndicator is a wrapper around gtk_menu_item_set_reserve_indicator().
func (v *MenuItem) SetReserveIndicator(reserve bool) {
	C.gtk_menu_item_set_reserve_indicator(v.native(), gbool(reserve))
}

/*
 * GtkMessageDialog
 */

// MessageDialog is a representation of GTK's GtkMessageDialog.
type MessageDialog struct {
	Dialog
}

// native returns a pointer to the underlying GtkMessageDialog.
func (v *MessageDialog) native() *C.GtkMessageDialog {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkMessageDialog(p)
}

func marshalMessageDialog(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapMessageDialog(obj), nil
}

func wrapMessageDialog(obj *glib.Object) *MessageDialog {
	if obj == nil {
		return nil
	}

	return &MessageDialog{Dialog{Window{Bin{Container{Widget{glib.InitiallyUnowned{obj}}}}}}}
}

// MessageDialogNew() is a wrapper around gtk_message_dialog_new().
// The text is created and formatted by the format specifier and any
// additional arguments.
func MessageDialogNew(parent IWindow, flags DialogFlags, mType MessageType, buttons ButtonsType, format string, args ...interface{}) *MessageDialog {
	s := fmt.Sprintf(format, args...)
	cstr := C.CString(s)
	defer C.free(unsafe.Pointer(cstr))
	var w *C.GtkWindow = nil
	if parent != nil {
		w = parent.toWindow()
	}
	c := C._gtk_message_dialog_new(w,
		C.GtkDialogFlags(flags), C.GtkMessageType(mType),
		C.GtkButtonsType(buttons), cstr)
	return wrapMessageDialog(glib.Take(unsafe.Pointer(c)))
}

// MessageDialogNewWithMarkup is a wrapper around
// gtk_message_dialog_new_with_markup().
func MessageDialogNewWithMarkup(parent IWindow, flags DialogFlags, mType MessageType, buttons ButtonsType, format string, args ...interface{}) *MessageDialog {
	s := fmt.Sprintf(format, args...)
	cstr := C.CString(s)
	defer C.free(unsafe.Pointer(cstr))
	var w *C.GtkWindow = nil
	if parent != nil {
		w = parent.toWindow()
	}
	c := C._gtk_message_dialog_new_with_markup(w,
		C.GtkDialogFlags(flags), C.GtkMessageType(mType),
		C.GtkButtonsType(buttons), cstr)
	return wrapMessageDialog(glib.Take(unsafe.Pointer(c)))
}

// SetMarkup is a wrapper around gtk_message_dialog_set_markup().
func (v *MessageDialog) SetMarkup(str string) {
	cstr := C.CString(str)
	defer C.free(unsafe.Pointer(cstr))
	C.gtk_message_dialog_set_markup(v.native(), (*C.gchar)(cstr))
}

// FormatSecondaryText is a wrapper around
// gtk_message_dialog_format_secondary_text().
func (v *MessageDialog) FormatSecondaryText(format string, args ...interface{}) {
	s := fmt.Sprintf(format, args...)
	cstr := C.CString(s)
	defer C.free(unsafe.Pointer(cstr))
	C._gtk_message_dialog_format_secondary_text(v.native(),
		(*C.gchar)(cstr))
}

// FormatSecondaryMarkup is a wrapper around
// gtk_message_dialog_format_secondary_text().
func (v *MessageDialog) FormatSecondaryMarkup(format string, args ...interface{}) {
	s := fmt.Sprintf(format, args...)
	cstr := C.CString(s)
	defer C.free(unsafe.Pointer(cstr))
	C._gtk_message_dialog_format_secondary_markup(v.native(),
		(*C.gchar)(cstr))
}

// GetMessageArea() is a wrapper around gtk_message_dialog_get_message_area().
func (v *MessageDialog) GetMessageArea() (*Box, error) {
	c := C.gtk_message_dialog_get_message_area(v.native())
	if c == nil {
		return nil, nilPtrErr
	}
	obj := glib.Take(unsafe.Pointer(c))
	b := &Box{Container{Widget{glib.InitiallyUnowned{obj}}}}
	return b, nil
}

/*
 * GtkNotebook
 */

// Notebook is a representation of GTK's GtkNotebook.
type Notebook struct {
	Container
}

// native returns a pointer to the underlying GtkNotebook.
func (v *Notebook) native() *C.GtkNotebook {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkNotebook(p)
}

func marshalNotebook(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapNotebook(obj), nil
}

func wrapNotebook(obj *glib.Object) *Notebook {
	if obj == nil {
		return nil
	}

	return &Notebook{Container{Widget{glib.InitiallyUnowned{obj}}}}
}

// NotebookNew() is a wrapper around gtk_notebook_new().
func NotebookNew() (*Notebook, error) {
	c := C.gtk_notebook_new()
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapNotebook(glib.Take(unsafe.Pointer(c))), nil
}

// AppendPage() is a wrapper around gtk_notebook_append_page().
func (v *Notebook) AppendPage(child IWidget, tabLabel IWidget) int {
	cTabLabel := nullableWidget(tabLabel)
	c := C.gtk_notebook_append_page(v.native(), child.toWidget(), cTabLabel)
	return int(c)
}

// AppendPageMenu() is a wrapper around gtk_notebook_append_page_menu().
func (v *Notebook) AppendPageMenu(child IWidget, tabLabel IWidget, menuLabel IWidget) int {
	c := C.gtk_notebook_append_page_menu(v.native(), child.toWidget(),
		tabLabel.toWidget(), menuLabel.toWidget())
	return int(c)
}

// PrependPage() is a wrapper around gtk_notebook_prepend_page().
func (v *Notebook) PrependPage(child IWidget, tabLabel IWidget) int {
	cTabLabel := nullableWidget(tabLabel)
	c := C.gtk_notebook_prepend_page(v.native(), child.toWidget(), cTabLabel)
	return int(c)
}

// PrependPageMenu() is a wrapper around gtk_notebook_prepend_page_menu().
func (v *Notebook) PrependPageMenu(child IWidget, tabLabel IWidget, menuLabel IWidget) int {
	c := C.gtk_notebook_prepend_page_menu(v.native(), child.toWidget(),
		tabLabel.toWidget(), menuLabel.toWidget())
	return int(c)
}

// InsertPage() is a wrapper around gtk_notebook_insert_page().
func (v *Notebook) InsertPage(child IWidget, tabLabel IWidget, position int) int {
	label := nullableWidget(tabLabel)
	c := C.gtk_notebook_insert_page(v.native(), child.toWidget(), label, C.gint(position))

	return int(c)
}

// InsertPageMenu() is a wrapper around gtk_notebook_insert_page_menu().
func (v *Notebook) InsertPageMenu(child IWidget, tabLabel IWidget, menuLabel IWidget, position int) int {
	c := C.gtk_notebook_insert_page_menu(v.native(), child.toWidget(),
		tabLabel.toWidget(), menuLabel.toWidget(), C.gint(position))
	return int(c)
}

// RemovePage() is a wrapper around gtk_notebook_remove_page().
func (v *Notebook) RemovePage(pageNum int) {
	C.gtk_notebook_remove_page(v.native(), C.gint(pageNum))
}

// PageNum() is a wrapper around gtk_notebook_page_num().
func (v *Notebook) PageNum(child IWidget) int {
	c := C.gtk_notebook_page_num(v.native(), child.toWidget())
	return int(c)
}

// NextPage() is a wrapper around gtk_notebook_next_page().
func (v *Notebook) NextPage() {
	C.gtk_notebook_next_page(v.native())
}

// PrevPage() is a wrapper around gtk_notebook_prev_page().
func (v *Notebook) PrevPage() {
	C.gtk_notebook_prev_page(v.native())
}

// ReorderChild() is a wrapper around gtk_notebook_reorder_child().
func (v *Notebook) ReorderChild(child IWidget, position int) {
	C.gtk_notebook_reorder_child(v.native(), child.toWidget(),
		C.gint(position))
}

// SetTabPos() is a wrapper around gtk_notebook_set_tab_pos().
func (v *Notebook) SetTabPos(pos PositionType) {
	C.gtk_notebook_set_tab_pos(v.native(), C.GtkPositionType(pos))
}

// SetShowTabs() is a wrapper around gtk_notebook_set_show_tabs().
func (v *Notebook) SetShowTabs(showTabs bool) {
	C.gtk_notebook_set_show_tabs(v.native(), gbool(showTabs))
}

// SetShowBorder() is a wrapper around gtk_notebook_set_show_border().
func (v *Notebook) SetShowBorder(showBorder bool) {
	C.gtk_notebook_set_show_border(v.native(), gbool(showBorder))
}

// SetScrollable() is a wrapper around gtk_notebook_set_scrollable().
func (v *Notebook) SetScrollable(scrollable bool) {
	C.gtk_notebook_set_scrollable(v.native(), gbool(scrollable))
}

// PopupEnable() is a wrapper around gtk_notebook_popup_enable().
func (v *Notebook) PopupEnable() {
	C.gtk_notebook_popup_enable(v.native())
}

// PopupDisable() is a wrapper around gtk_notebook_popup_disable().
func (v *Notebook) PopupDisable() {
	C.gtk_notebook_popup_disable(v.native())
}

// GetCurrentPage() is a wrapper around gtk_notebook_get_current_page().
func (v *Notebook) GetCurrentPage() int {
	c := C.gtk_notebook_get_current_page(v.native())
	return int(c)
}

// GetMenuLabel() is a wrapper around gtk_notebook_get_menu_label().
func (v *Notebook) GetMenuLabel(child IWidget) (IWidget, error) {
	c := C.gtk_notebook_get_menu_label(v.native(), child.toWidget())
	if c == nil {
		return nil, nil
	}
	return castWidget(c)
}

// GetNthPage() is a wrapper around gtk_notebook_get_nth_page().
func (v *Notebook) GetNthPage(pageNum int) (IWidget, error) {
	c := C.gtk_notebook_get_nth_page(v.native(), C.gint(pageNum))
	if c == nil {
		return nil, fmt.Errorf("page %d is out of bounds", pageNum)
	}
	return castWidget(c)
}

// GetNPages() is a wrapper around gtk_notebook_get_n_pages().
func (v *Notebook) GetNPages() int {
	c := C.gtk_notebook_get_n_pages(v.native())
	return int(c)
}

// GetTabLabel() is a wrapper around gtk_notebook_get_tab_label().
func (v *Notebook) GetTabLabel(child IWidget) (IWidget, error) {
	c := C.gtk_notebook_get_tab_label(v.native(), child.toWidget())
	if c == nil {
		return nil, nil
	}
	return castWidget(c)
}

// SetMenuLabel() is a wrapper around gtk_notebook_set_menu_label().
func (v *Notebook) SetMenuLabel(child, menuLabel IWidget) {
	C.gtk_notebook_set_menu_label(v.native(), child.toWidget(),
		menuLabel.toWidget())
}

// SetMenuLabelText() is a wrapper around gtk_notebook_set_menu_label_text().
func (v *Notebook) SetMenuLabelText(child IWidget, menuText string) {
	cstr := C.CString(menuText)
	defer C.free(unsafe.Pointer(cstr))
	C.gtk_notebook_set_menu_label_text(v.native(), child.toWidget(),
		(*C.gchar)(cstr))
}

// SetTabLabel() is a wrapper around gtk_notebook_set_tab_label().
func (v *Notebook) SetTabLabel(child, tabLabel IWidget) {
	C.gtk_notebook_set_tab_label(v.native(), child.toWidget(),
		tabLabel.toWidget())
}

// SetTabLabelText() is a wrapper around gtk_notebook_set_tab_label_text().
func (v *Notebook) SetTabLabelText(child IWidget, tabText string) {
	cstr := C.CString(tabText)
	defer C.free(unsafe.Pointer(cstr))
	C.gtk_notebook_set_tab_label_text(v.native(), child.toWidget(),
		(*C.gchar)(cstr))
}

// SetTabReorderable() is a wrapper around gtk_notebook_set_tab_reorderable().
func (v *Notebook) SetTabReorderable(child IWidget, reorderable bool) {
	C.gtk_notebook_set_tab_reorderable(v.native(), child.toWidget(),
		gbool(reorderable))
}

// SetTabDetachable() is a wrapper around gtk_notebook_set_tab_detachable().
func (v *Notebook) SetTabDetachable(child IWidget, detachable bool) {
	C.gtk_notebook_set_tab_detachable(v.native(), child.toWidget(),
		gbool(detachable))
}

// GetMenuLabelText() is a wrapper around gtk_notebook_get_menu_label_text().
func (v *Notebook) GetMenuLabelText(child IWidget) (string, error) {
	c := C.gtk_notebook_get_menu_label_text(v.native(), child.toWidget())
	if c == nil {
		return "", errors.New("No menu label for widget")
	}
	return goString(c), nil
}

// GetScrollable() is a wrapper around gtk_notebook_get_scrollable().
func (v *Notebook) GetScrollable() bool {
	c := C.gtk_notebook_get_scrollable(v.native())
	return gobool(c)
}

// GetShowBorder() is a wrapper around gtk_notebook_get_show_border().
func (v *Notebook) GetShowBorder() bool {
	c := C.gtk_notebook_get_show_border(v.native())
	return gobool(c)
}

// GetShowTabs() is a wrapper around gtk_notebook_get_show_tabs().
func (v *Notebook) GetShowTabs() bool {
	c := C.gtk_notebook_get_show_tabs(v.native())
	return gobool(c)
}

// GetTabLabelText() is a wrapper around gtk_notebook_get_tab_label_text().
func (v *Notebook) GetTabLabelText(child IWidget) (string, error) {
	c := C.gtk_notebook_get_tab_label_text(v.native(), child.toWidget())
	if c == nil {
		return "", errors.New("No tab label for widget")
	}
	return goString(c), nil
}

// GetTabPos() is a wrapper around gtk_notebook_get_tab_pos().
func (v *Notebook) GetTabPos() PositionType {
	c := C.gtk_notebook_get_tab_pos(v.native())
	return PositionType(c)
}

// GetTabReorderable() is a wrapper around gtk_notebook_get_tab_reorderable().
func (v *Notebook) GetTabReorderable(child IWidget) bool {
	c := C.gtk_notebook_get_tab_reorderable(v.native(), child.toWidget())
	return gobool(c)
}

// GetTabDetachable() is a wrapper around gtk_notebook_get_tab_detachable().
func (v *Notebook) GetTabDetachable(child IWidget) bool {
	c := C.gtk_notebook_get_tab_detachable(v.native(), child.toWidget())
	return gobool(c)
}

// SetCurrentPage() is a wrapper around gtk_notebook_set_current_page().
func (v *Notebook) SetCurrentPage(pageNum int) {
	C.gtk_notebook_set_current_page(v.native(), C.gint(pageNum))
}

// SetGroupName() is a wrapper around gtk_notebook_set_group_name().
func (v *Notebook) SetGroupName(groupName string) {
	cstr := C.CString(groupName)
	defer C.free(unsafe.Pointer(cstr))
	C.gtk_notebook_set_group_name(v.native(), (*C.gchar)(cstr))
}

// GetGroupName() is a wrapper around gtk_notebook_get_group_name().
func (v *Notebook) GetGroupName() (string, error) {
	c := C.gtk_notebook_get_group_name(v.native())
	if c == nil {
		return "", errors.New("No group name")
	}
	return goString(c), nil
}

// SetActionWidget() is a wrapper around gtk_notebook_set_action_widget().
func (v *Notebook) SetActionWidget(widget IWidget, packType PackType) {
	C.gtk_notebook_set_action_widget(v.native(), widget.toWidget(),
		C.GtkPackType(packType))
}

// GetActionWidget() is a wrapper around gtk_notebook_get_action_widget().
func (v *Notebook) GetActionWidget(packType PackType) (IWidget, error) {
	c := C.gtk_notebook_get_action_widget(v.native(), C.GtkPackType(packType))
	if c == nil {
		return nil, nil
	}
	return castWidget(c)
}

/*
 * GtkOffscreenWindow
 */

// OffscreenWindow is a representation of GTK's GtkOffscreenWindow.
type OffscreenWindow struct {
	Window
}

// native returns a pointer to the underlying GtkOffscreenWindow.
func (v *OffscreenWindow) native() *C.GtkOffscreenWindow {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkOffscreenWindow(p)
}

func marshalOffscreenWindow(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapOffscreenWindow(obj), nil
}

func wrapOffscreenWindow(obj *glib.Object) *OffscreenWindow {
	if obj == nil {
		return nil
	}

	return &OffscreenWindow{Window{Bin{Container{Widget{
		glib.InitiallyUnowned{obj}}}}}}
}

// OffscreenWindowNew is a wrapper around gtk_offscreen_window_new().
func OffscreenWindowNew() (*OffscreenWindow, error) {
	c := C.gtk_offscreen_window_new()
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapOffscreenWindow(glib.Take(unsafe.Pointer(c))), nil
}

// GetSurface is a wrapper around gtk_offscreen_window_get_surface().
// The returned surface is safe to use over window resizes.
func (v *OffscreenWindow) GetSurface() (*cairo.Surface, error) {
	c := C.gtk_offscreen_window_get_surface(v.native())
	if c == nil {
		return nil, nilPtrErr
	}
	cairoPtr := (uintptr)(unsafe.Pointer(c))
	s := cairo.NewSurface(cairoPtr, true)
	return s, nil
}

// GetPixbuf is a wrapper around gtk_offscreen_window_get_pixbuf().
func (v *OffscreenWindow) GetPixbuf() (*gdk.Pixbuf, error) {
	c := C.gtk_offscreen_window_get_pixbuf(v.native())
	if c == nil {
		return nil, nilPtrErr
	}

	// Pixbuf is returned with ref count of 1, so don't increment.
	// Is it a floating reference?
	pb := &gdk.Pixbuf{glib.Take(unsafe.Pointer(c))}
	return pb, nil
}

/*
 * GtkOrientable
 */

// Orientable is a representation of GTK's GtkOrientable GInterface.
type Orientable struct {
	*glib.Object
}

// IOrientable is an interface type implemented by all structs
// embedding an Orientable.  It is meant to be used as an argument type
// for wrapper functions that wrap around a C GTK function taking a
// GtkOrientable.
type IOrientable interface {
	toOrientable() *C.GtkOrientable
}

// native returns a pointer to the underlying GObject as a GtkOrientable.
func (v *Orientable) native() *C.GtkOrientable {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkOrientable(p)
}

func marshalOrientable(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapOrientable(obj), nil
}

func wrapOrientable(obj *glib.Object) *Orientable {
	if obj == nil {
		return nil
	}

	return &Orientable{obj}
}

// GetOrientation is a wrapper around gtk_orientable_get_orientation().
func (v *Orientable) GetOrientation() Orientation {
	c := C.gtk_orientable_get_orientation(v.native())
	return Orientation(c)
}

// SetOrientation is a wrapper around gtk_orientable_set_orientation().
func (v *Orientable) SetOrientation(orientation Orientation) {
	C.gtk_orientable_set_orientation(v.native(),
		C.GtkOrientation(orientation))
}

/*
 * GtkOverlay
 */

// Overlay is a representation of GTK's GtkOverlay.
type Overlay struct {
	Bin
}

// native returns a pointer to the underlying GtkOverlay.
func (v *Overlay) native() *C.GtkOverlay {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkOverlay(p)
}

func marshalOverlay(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapOverlay(obj), nil
}

func wrapOverlay(obj *glib.Object) *Overlay {
	if obj == nil {
		return nil
	}

	return &Overlay{Bin{Container{Widget{glib.InitiallyUnowned{obj}}}}}
}

// OverlayNew() is a wrapper around gtk_overlay_new().
func OverlayNew() (*Overlay, error) {
	c := C.gtk_overlay_new()
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapOverlay(glib.Take(unsafe.Pointer(c))), nil
}

// AddOverlay() is a wrapper around gtk_overlay_add_overlay().
func (v *Overlay) AddOverlay(widget IWidget) {
	C.gtk_overlay_add_overlay(v.native(), widget.toWidget())
}

/*
 * GtkPaned
 */

// Paned is a representation of GTK's GtkPaned.
type Paned struct {
	Bin
}

// native returns a pointer to the underlying GtkPaned.
func (v *Paned) native() *C.GtkPaned {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkPaned(p)
}

func marshalPaned(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapPaned(obj), nil
}

func wrapPaned(obj *glib.Object) *Paned {
	if obj == nil {
		return nil
	}

	return &Paned{Bin{Container{Widget{glib.InitiallyUnowned{obj}}}}}
}

// PanedNew() is a wrapper around gtk_paned_new().
func PanedNew(orientation Orientation) (*Paned, error) {
	c := C.gtk_paned_new(C.GtkOrientation(orientation))
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapPaned(glib.Take(unsafe.Pointer(c))), nil
}

// Add1() is a wrapper around gtk_paned_add1().
func (v *Paned) Add1(child IWidget) {
	C.gtk_paned_add1(v.native(), child.toWidget())
}

// Add2() is a wrapper around gtk_paned_add2().
func (v *Paned) Add2(child IWidget) {
	C.gtk_paned_add2(v.native(), child.toWidget())
}

// Pack1() is a wrapper around gtk_paned_pack1().
func (v *Paned) Pack1(child IWidget, resize, shrink bool) {
	C.gtk_paned_pack1(v.native(), child.toWidget(), gbool(resize), gbool(shrink))
}

// Pack2() is a wrapper around gtk_paned_pack2().
func (v *Paned) Pack2(child IWidget, resize, shrink bool) {
	C.gtk_paned_pack2(v.native(), child.toWidget(), gbool(resize), gbool(shrink))
}

// SetPosition() is a wrapper around gtk_paned_set_position().
func (v *Paned) SetPosition(position int) {
	C.gtk_paned_set_position(v.native(), C.gint(position))
}

// GetChild1() is a wrapper around gtk_paned_get_child1().
func (v *Paned) GetChild1() (IWidget, error) {
	c := C.gtk_paned_get_child1(v.native())
	if c == nil {
		return nil, nil
	}
	return castWidget(c)
}

// GetChild2() is a wrapper around gtk_paned_get_child2().
func (v *Paned) GetChild2() (IWidget, error) {
	c := C.gtk_paned_get_child2(v.native())
	if c == nil {
		return nil, nil
	}
	return castWidget(c)
}

// GetHandleWindow() is a wrapper around gtk_paned_get_handle_window().
func (v *Paned) GetHandleWindow() (*gdk.Window, error) {
	c := C.gtk_paned_get_handle_window(v.native())
	if c == nil {
		return nil, nilPtrErr
	}
	return &gdk.Window{glib.Take(unsafe.Pointer(c))}, nil
}

// GetPosition() is a wrapper around gtk_paned_get_position().
func (v *Paned) GetPosition() int {
	return int(C.gtk_paned_get_position(v.native()))
}

/*
 * GtkInvisible
 */

// TODO:
// gtk_invisible_new().
// gtk_invisible_new_for_screen().
// gtk_invisible_set_screen().
// gtk_invisible_get_screen().

/*
 * GtkProgressBar
 */

// ProgressBar is a representation of GTK's GtkProgressBar.
type ProgressBar struct {
	Widget
	// Interfaces
	Orientable
}

// native returns a pointer to the underlying GtkProgressBar.
func (v *ProgressBar) native() *C.GtkProgressBar {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkProgressBar(p)
}

func marshalProgressBar(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapProgressBar(obj), nil
}

func wrapProgressBar(obj *glib.Object) *ProgressBar {
	if obj == nil {
		return nil
	}

	o := wrapOrientable(obj)
	return &ProgressBar{Widget{glib.InitiallyUnowned{obj}}, *o}
}

// ProgressBarNew is a wrapper around gtk_progress_bar_new().
func ProgressBarNew() (*ProgressBar, error) {
	c := C.gtk_progress_bar_new()
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapProgressBar(glib.Take(unsafe.Pointer(c))), nil
}

// SetFraction is a wrapper around gtk_progress_bar_set_fraction().
func (v *ProgressBar) SetFraction(fraction float64) {
	C.gtk_progress_bar_set_fraction(v.native(), C.gdouble(fraction))
}

// GetFraction is a wrapper around gtk_progress_bar_get_fraction().
func (v *ProgressBar) GetFraction() float64 {
	c := C.gtk_progress_bar_get_fraction(v.native())
	return float64(c)
}

// SetShowText is a wrapper around gtk_progress_bar_set_show_text().
func (v *ProgressBar) SetShowText(showText bool) {
	C.gtk_progress_bar_set_show_text(v.native(), gbool(showText))
}

// GetShowText is a wrapper around gtk_progress_bar_get_show_text().
func (v *ProgressBar) GetShowText() bool {
	c := C.gtk_progress_bar_get_show_text(v.native())
	return gobool(c)
}

// SetText is a wrapper around gtk_progress_bar_set_text().
func (v *ProgressBar) SetText(text string) {
	cstr := C.CString(text)
	defer C.free(unsafe.Pointer(cstr))
	C.gtk_progress_bar_set_text(v.native(), (*C.gchar)(cstr))
}

// TODO:
// gtk_progress_bar_get_text().
// gtk_progress_bar_set_ellipsize().
// gtk_progress_bar_get_ellipsize().

// SetPulseStep is a wrapper around gtk_progress_bar_set_pulse_step().
func (v *ProgressBar) SetPulseStep(fraction float64) {
	C.gtk_progress_bar_set_pulse_step(v.native(), C.gdouble(fraction))
}

// GetPulseStep is a wrapper around gtk_progress_bar_get_pulse_step().
func (v *ProgressBar) GetPulseStep() float64 {
	c := C.gtk_progress_bar_get_pulse_step(v.native())
	return float64(c)
}

// Pulse is a wrapper arountd gtk_progress_bar_pulse().
func (v *ProgressBar) Pulse() {
	C.gtk_progress_bar_pulse(v.native())
}

// SetInverted is a wrapper around gtk_progress_bar_set_inverted().
func (v *ProgressBar) SetInverted(inverted bool) {
	C.gtk_progress_bar_set_inverted(v.native(), gbool(inverted))
}

// GetInverted is a wrapper around gtk_progress_bar_get_inverted().
func (v *ProgressBar) GetInverted() bool {
	c := C.gtk_progress_bar_get_inverted(v.native())
	return gobool(c)
}

/*
 * GtkRadioButton
 */

// RadioButton is a representation of GTK's GtkRadioButton.
type RadioButton struct {
	CheckButton
}

// native returns a pointer to the underlying GtkRadioButton.
func (v *RadioButton) native() *C.GtkRadioButton {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkRadioButton(p)
}

func marshalRadioButton(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapRadioButton(obj), nil
}

func wrapRadioButton(obj *glib.Object) *RadioButton {
	if obj == nil {
		return nil
	}

	actionable := wrapActionable(obj)
	return &RadioButton{CheckButton{ToggleButton{Button{Bin{Container{
		Widget{glib.InitiallyUnowned{obj}}}}, actionable}}}}
}

// RadioButtonNew is a wrapper around gtk_radio_button_new().
func RadioButtonNew(group *glib.SList) (*RadioButton, error) {
	c := C.gtk_radio_button_new(cGSList(group))
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapRadioButton(glib.Take(unsafe.Pointer(c))), nil
}

// RadioButtonNewFromWidget is a wrapper around gtk_radio_button_new_from_widget().
func RadioButtonNewFromWidget(radioGroupMember *RadioButton) (*RadioButton, error) {
	c := C.gtk_radio_button_new_from_widget(radioGroupMember.native())
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapRadioButton(glib.Take(unsafe.Pointer(c))), nil
}

// RadioButtonNewWithLabel is a wrapper around gtk_radio_button_new_with_label().
func RadioButtonNewWithLabel(group *glib.SList, label string) (*RadioButton, error) {
	cstr := C.CString(label)
	defer C.free(unsafe.Pointer(cstr))
	c := C.gtk_radio_button_new_with_label(cGSList(group), (*C.gchar)(cstr))
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapRadioButton(glib.Take(unsafe.Pointer(c))), nil
}

// RadioButtonNewWithLabelFromWidget is a wrapper around gtk_radio_button_new_with_label_from_widget().
func RadioButtonNewWithLabelFromWidget(radioGroupMember *RadioButton, label string) (*RadioButton, error) {
	cstr := C.CString(label)
	defer C.free(unsafe.Pointer(cstr))
	var cradio *C.GtkRadioButton
	if radioGroupMember != nil {
		cradio = radioGroupMember.native()
	}
	c := C.gtk_radio_button_new_with_label_from_widget(cradio, (*C.gchar)(cstr))
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapRadioButton(glib.Take(unsafe.Pointer(c))), nil
}

// RadioButtonNewWithMnemonic is a wrapper around gtk_radio_button_new_with_mnemonic().
func RadioButtonNewWithMnemonic(group *glib.SList, label string) (*RadioButton, error) {
	cstr := C.CString(label)
	defer C.free(unsafe.Pointer(cstr))
	c := C.gtk_radio_button_new_with_mnemonic(cGSList(group), (*C.gchar)(cstr))
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapRadioButton(glib.Take(unsafe.Pointer(c))), nil
}

// RadioButtonNewWithMnemonicFromWidget is a wrapper around gtk_radio_button_new_with_mnemonic_from_widget().
func RadioButtonNewWithMnemonicFromWidget(radioGroupMember *RadioButton, label string) (*RadioButton, error) {
	cstr := C.CString(label)
	defer C.free(unsafe.Pointer(cstr))
	var cradio *C.GtkRadioButton
	if radioGroupMember != nil {
		cradio = radioGroupMember.native()
	}
	c := C.gtk_radio_button_new_with_mnemonic_from_widget(cradio,
		(*C.gchar)(cstr))
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapRadioButton(glib.Take(unsafe.Pointer(c))), nil
}

// SetGroup is a wrapper around gtk_radio_button_set_group().
func (v *RadioButton) SetGroup(group *glib.SList) {
	C.gtk_radio_button_set_group(v.native(), cGSList(group))
}

// GetGroup is a wrapper around gtk_radio_button_get_group().
func (v *RadioButton) GetGroup() (*glib.SList, error) {
	c := C.gtk_radio_button_get_group(v.native())
	if c == nil {
		return nil, nilPtrErr
	}

	// TODO: call DataWrapper on SList and wrap them to gtk.RadioButton

	return glib.WrapSList(uintptr(unsafe.Pointer(c))), nil
}

// JoinGroup is a wrapper around gtk_radio_button_join_group().
func (v *RadioButton) JoinGroup(groupSource *RadioButton) {
	var cgroup *C.GtkRadioButton
	if groupSource != nil {
		cgroup = groupSource.native()
	}
	C.gtk_radio_button_join_group(v.native(), cgroup)
}

/*
 * GtkRadioMenuItem
 */

// RadioMenuItem is a representation of GTK's GtkRadioMenuItem.
type RadioMenuItem struct {
	CheckMenuItem
}

// native returns a pointer to the underlying GtkRadioMenuItem.
func (v *RadioMenuItem) native() *C.GtkRadioMenuItem {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkRadioMenuItem(p)
}

func marshalRadioMenuItem(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapRadioMenuItem(obj), nil
}

func wrapRadioMenuItem(obj *glib.Object) *RadioMenuItem {
	if obj == nil {
		return nil
	}

	return &RadioMenuItem{CheckMenuItem{MenuItem{Bin{Container{
		Widget{glib.InitiallyUnowned{obj}}}}}}}
}

// RadioMenuItemNew is a wrapper around gtk_radio_menu_item_new().
func RadioMenuItemNew(group *glib.SList) (*RadioMenuItem, error) {
	c := C.gtk_radio_menu_item_new(cGSList(group))
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapRadioMenuItem(glib.Take(unsafe.Pointer(c))), nil
}

// RadioMenuItemNewWithLabel is a wrapper around gtk_radio_menu_item_new_with_label().
func RadioMenuItemNewWithLabel(group *glib.SList, label string) (*RadioMenuItem, error) {
	cstr := C.CString(label)
	defer C.free(unsafe.Pointer(cstr))
	c := C.gtk_radio_menu_item_new_with_label(cGSList(group), (*C.gchar)(cstr))
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapRadioMenuItem(glib.Take(unsafe.Pointer(c))), nil
}

// RadioMenuItemNewWithMnemonic is a wrapper around gtk_radio_menu_item_new_with_mnemonic().
func RadioMenuItemNewWithMnemonic(group *glib.SList, label string) (*RadioMenuItem, error) {
	cstr := C.CString(label)
	defer C.free(unsafe.Pointer(cstr))
	c := C.gtk_radio_menu_item_new_with_mnemonic(cGSList(group), (*C.gchar)(cstr))
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapRadioMenuItem(glib.Take(unsafe.Pointer(c))), nil
}

// RadioMenuItemNewFromWidget is a wrapper around gtk_radio_menu_item_new_from_widget().
func RadioMenuItemNewFromWidget(group *RadioMenuItem) (*RadioMenuItem, error) {
	c := C.gtk_radio_menu_item_new_from_widget(group.native())
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapRadioMenuItem(glib.Take(unsafe.Pointer(c))), nil
}

// RadioMenuItemNewWithLabelFromWidget is a wrapper around gtk_radio_menu_item_new_with_label_from_widget().
func RadioMenuItemNewWithLabelFromWidget(group *RadioMenuItem, label string) (*RadioMenuItem, error) {
	cstr := C.CString(label)
	defer C.free(unsafe.Pointer(cstr))
	c := C.gtk_radio_menu_item_new_with_label_from_widget(group.native(),
		(*C.gchar)(cstr))
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapRadioMenuItem(glib.Take(unsafe.Pointer(c))), nil
}

// RadioMenuItemNewWithMnemonicFromWidget is a wrapper around gtk_radio_menu_item_new_with_mnemonic_from_widget().
func RadioMenuItemNewWithMnemonicFromWidget(group *RadioMenuItem, label string) (*RadioMenuItem, error) {
	cstr := C.CString(label)
	defer C.free(unsafe.Pointer(cstr))
	c := C.gtk_radio_menu_item_new_with_mnemonic_from_widget(group.native(),
		(*C.gchar)(cstr))
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapRadioMenuItem(glib.Take(unsafe.Pointer(c))), nil
}

// SetGroup is a wrapper around gtk_radio_menu_item_set_group().
func (v *RadioMenuItem) SetGroup(group *glib.SList) {
	C.gtk_radio_menu_item_set_group(v.native(), cGSList(group))
}

// GetGroup is a wrapper around gtk_radio_menu_item_get_group().
func (v *RadioMenuItem) GetGroup() (*glib.SList, error) {
	c := C.gtk_radio_menu_item_get_group(v.native())
	if c == nil {
		return nil, nilPtrErr
	}

	// TODO: call DataWrapper on SList and wrap them to gtk.RadioMenuItem

	return glib.WrapSList(uintptr(unsafe.Pointer(c))), nil
}

/*
 * GtkRange
 */

// Range is a representation of GTK's GtkRange.
type Range struct {
	Widget
}

// native returns a pointer to the underlying GtkRange.
func (v *Range) native() *C.GtkRange {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkRange(p)
}

func marshalRange(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapRange(obj), nil
}

func wrapRange(obj *glib.Object) *Range {
	if obj == nil {
		return nil
	}

	return &Range{Widget{glib.InitiallyUnowned{obj}}}
}

// GetFillLevel is a wrapper around gtk_range_get_fill_level().
func (v *Range) GetFillLevel() float64 {
	return float64(C.gtk_range_get_fill_level(v.native()))
}

// GetRestrictToFillLevel is a wrapper around gtk_range_get_restrict_to_fill_level().
func (v *Range) GetRestrictToFillLevel() bool {
	return gobool(C.gtk_range_get_restrict_to_fill_level(v.native()))
}

// GetShowFillLevel is a wrapper around gtk_range_get_show_fill_level().
func (v *Range) GetShowFillLevel() bool {
	return gobool(C.gtk_range_get_show_fill_level(v.native()))
}

// SetFillLevel is a wrapper around gtk_range_set_fill_level().
func (v *Range) SetFillLevel(fill_level float64) {
	C.gtk_range_set_fill_level(v.native(), C.gdouble(fill_level))
}

// RestrictToFillLevel is a wrapper around gtk_range_set_restrict_to_fill_level().
func (v *Range) RestrictToFillLevel(restrict_to_fill_level bool) {
	C.gtk_range_set_restrict_to_fill_level(v.native(), gbool(restrict_to_fill_level))
}

// SetShowFillLevel is a wrapper around gtk_range_set_show_fill_level().
func (v *Range) SetShowFillLevel(show_fill_level bool) {
	C.gtk_range_set_show_fill_level(v.native(), gbool(show_fill_level))
}

// GetAdjustment is a wrapper around gtk_range_get_adjustment().
func (v *Range) GetAdjustment() *Adjustment {

	c := C.gtk_range_get_adjustment(v.native())
	if c == nil {
		return nil
	}
	obj := glib.Take(unsafe.Pointer(c))
	return wrapAdjustment(obj)
}

// SetAdjustment is a wrapper around gtk_range_set_adjustment().
func (v *Range) SetAdjustment(adjustment *Adjustment) {
	C.gtk_range_set_adjustment(v.native(), adjustment.native())
}

// GetValue is a wrapper around gtk_range_get_value().
func (v *Range) GetValue() float64 {
	c := C.gtk_range_get_value(v.native())
	return float64(c)
}

// SetValue is a wrapper around gtk_range_set_value().
func (v *Range) SetValue(value float64) {
	C.gtk_range_set_value(v.native(), C.gdouble(value))
}

// SetIncrements is a wrapper around gtk_range_set_increments().
func (v *Range) SetIncrements(step, page float64) {
	C.gtk_range_set_increments(v.native(), C.gdouble(step), C.gdouble(page))
}

// SetRange is a wrapper around gtk_range_set_range().
func (v *Range) SetRange(min, max float64) {
	C.gtk_range_set_range(v.native(), C.gdouble(min), C.gdouble(max))
}

// GetInverted is a wrapper around gtk_range_get_inverted().
func (v *Range) GetInverted() bool {
	c := C.gtk_range_get_inverted(v.native())
	return gobool(c)
}

// SetInverted is a wrapper around gtk_range_set_inverted().
func (v *Range) SetInverted(inverted bool) {
	C.gtk_range_set_inverted(v.native(), gbool(inverted))
}

// GetRoundDigits is a wrapper around gtk_range_get_round_digits().
func (v *Range) GetRoundDigits() int {
	return int(C.gtk_range_get_round_digits(v.native()))
}

// SetRoundDigits is a wrapper around gtk_range_set_round_digits().
func (v *Range) SetRoundDigits(round_digits int) {
	C.gtk_range_set_round_digits(v.native(), C.gint(round_digits))
}

// SetLowerStepperSensitivity is a wrapper around gtk_range_set_lower_stepper_sensitivity().
func (v *Range) SetLowerStepperSensitivity(sensitivity SensitivityType) {
	C.gtk_range_set_lower_stepper_sensitivity(
		v.native(),
		C.GtkSensitivityType(sensitivity))
}

// GetLowerStepperSensitivity is a wrapper around gtk_range_get_lower_stepper_sensitivity().
func (v *Range) GetLowerStepperSensitivity() SensitivityType {
	return SensitivityType(C.gtk_range_get_lower_stepper_sensitivity(
		v.native()))
}

// SetUpperStepperSensitivity is a wrapper around gtk_range_set_upper_stepper_sensitivity().
func (v *Range) SetUpperStepperSensitivity(sensitivity SensitivityType) {
	C.gtk_range_set_upper_stepper_sensitivity(
		v.native(),
		C.GtkSensitivityType(sensitivity))
}

// GetUpperStepperSensitivity is a wrapper around gtk_range_get_upper_stepper_sensitivity().
func (v *Range) GetUpperStepperSensitivity() SensitivityType {
	return SensitivityType(C.gtk_range_get_upper_stepper_sensitivity(
		v.native()))
}

// GetFlippable is a wrapper around gtk_range_get_flippable().
func (v *Range) GetFlippable() bool {
	return gobool(C.gtk_range_get_flippable(v.native()))
}

// SetFlippable is a wrapper around gtk_range_set_flippable().
func (v *Range) SetFlippable(flippable bool) {
	C.gtk_range_set_flippable(v.native(), gbool(flippable))
}

// GetRangeRect is a wrapper around gtk_range_get_range_rect().
func (v *Range) GetRangeRect() *gdk.Rectangle {
	var cRect *C.GdkRectangle
	C.gtk_range_get_range_rect(v.native(), cRect)
	return gdk.WrapRectangle(uintptr(unsafe.Pointer(cRect)))
}

// GetSliderRange is a wrapper around gtk_range_get_slider_range().
func (v *Range) GetSliderRange() (int, int) {
	var cStart, cEnd C.gint
	C.gtk_range_get_slider_range(v.native(), &cStart, &cEnd)
	return int(cStart), int(cEnd)
}

// GetSliderFixedSize is a wrapper gtk_range_get_slider_size_fixed().
func (v *Range) GetSliderFixedSize() bool {
	return gobool(C.gtk_range_get_slider_size_fixed(v.native()))
}

// SetSliderFixedSize is a wrapper around gtk_range_set_slider_size_fixed().
func (v *Range) SetSliderFixedSize(size_fixed bool) {
	C.gtk_range_set_slider_size_fixed(v.native(), gbool(size_fixed))
}

// IRecentChooser is an interface type implemented by all structs
// embedding a RecentChooser.  It is meant to be used as an argument type
// for wrapper functions that wrap around a C GTK function taking a
// GtkWidget.
type IRecentChooser interface {
	toRecentChooser() *C.GtkRecentChooser
}

/*
 * GtkRecentChooser
 */

// RecentChooser is a representation of GTK's GtkRecentChooser.
type RecentChooser struct {
	*glib.Object
}

// native returns a pointer to the underlying GtkRecentChooser.
func (v *RecentChooser) native() *C.GtkRecentChooser {
	if v == nil || v.Object == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkRecentChooser(p)
}

func wrapRecentChooser(obj *glib.Object) *RecentChooser {
	if obj == nil {
		return nil
	}

	return &RecentChooser{obj}
}

func (v *RecentChooser) toRecentChooser() *C.GtkRecentChooser {
	return v.native()
}

func (v *RecentChooser) GetCurrentUri() string {
	curi := C.gtk_recent_chooser_get_current_uri(v.native())
	return goString(curi)
}

func (v *RecentChooser) AddFilter(filter *RecentFilter) {
	C.gtk_recent_chooser_add_filter(v.native(), filter.native())
}

func (v *RecentChooser) RemoveFilter(filter *RecentFilter) {
	C.gtk_recent_chooser_remove_filter(v.native(), filter.native())
}

/*
 * GtkRecentChooserWidget
 */

// TODO:
// gtk_recent_chooser_widget_new().
// gtk_recent_chooser_widget_new_for_manager().

/*
 * GtkRecentChooserMenu
 */

// RecentChooserMenu is a representation of GTK's GtkRecentChooserMenu.
type RecentChooserMenu struct {
	Menu
	RecentChooser
}

// native returns a pointer to the underlying GtkRecentManager.
func (v *RecentChooserMenu) native() *C.GtkRecentChooserMenu {
	if v == nil || v.Object == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkRecentChooserMenu(p)
}

func wrapRecentChooserMenu(obj *glib.Object) *RecentChooserMenu {
	if obj == nil {
		return nil
	}

	return &RecentChooserMenu{
		Menu{MenuShell{Container{Widget{glib.InitiallyUnowned{obj}}}}},
		RecentChooser{obj},
	}
}

/*
 * GtkRecentFilter
 */

// RecentFilter is a representation of GTK's GtkRecentFilter.
type RecentFilter struct {
	glib.InitiallyUnowned
}

// native returns a pointer to the underlying GtkRecentFilter.
func (v *RecentFilter) native() *C.GtkRecentFilter {
	if v == nil || v.Object == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkRecentFilter(p)
}

func wrapRecentFilter(obj *glib.Object) *RecentFilter {
	if obj == nil {
		return nil
	}

	return &RecentFilter{glib.InitiallyUnowned{obj}}
}

// RecentFilterNew is a wrapper around gtk_recent_filter_new().
func RecentFilterNew() (*RecentFilter, error) {
	c := C.gtk_recent_filter_new()
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapRecentFilter(glib.Take(unsafe.Pointer(c))), nil
}

/*
 * GtkRecentManager
 */

// RecentManager is a representation of GTK's GtkRecentManager.
type RecentManager struct {
	*glib.Object
}

// native returns a pointer to the underlying GtkRecentManager.
func (v *RecentManager) native() *C.GtkRecentManager {
	if v == nil || v.Object == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkRecentManager(p)
}

func marshalRecentManager(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapRecentManager(obj), nil
}

func wrapRecentManager(obj *glib.Object) *RecentManager {
	if obj == nil {
		return nil
	}

	return &RecentManager{obj}
}

// RecentManagerGetDefault is a wrapper around gtk_recent_manager_get_default().
func RecentManagerGetDefault() (*RecentManager, error) {
	c := C.gtk_recent_manager_get_default()
	if c == nil {
		return nil, nilPtrErr
	}
	obj := glib.Take(unsafe.Pointer(c))
	v := wrapRecentManager(obj)
	return v, nil
}

// AddItem is a wrapper around gtk_recent_manager_add_item().
func (v *RecentManager) AddItem(fileURI string) bool {
	cstr := C.CString(fileURI)
	defer C.free(unsafe.Pointer(cstr))
	cok := C.gtk_recent_manager_add_item(v.native(), (*C.gchar)(cstr))
	return gobool(cok)
}

/*
 * GtkScale
 */

// Scale is a representation of GTK's GtkScale.
type Scale struct {
	Range
}

// native returns a pointer to the underlying GtkScale.
func (v *Scale) native() *C.GtkScale {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkScale(p)
}

func marshalScale(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapScale(obj), nil
}

func wrapScale(obj *glib.Object) *Scale {
	if obj == nil {
		return nil
	}

	return &Scale{Range{Widget{glib.InitiallyUnowned{obj}}}}
}

// ScaleNew is a wrapper around gtk_scale_new().
func ScaleNew(orientation Orientation, adjustment *Adjustment) (*Scale, error) {
	c := C.gtk_scale_new(C.GtkOrientation(orientation), adjustment.native())
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapScale(glib.Take(unsafe.Pointer(c))), nil
}

// ScaleNewWithRange is a wrapper around gtk_scale_new_with_range().
func ScaleNewWithRange(orientation Orientation, min, max, step float64) (*Scale, error) {
	c := C.gtk_scale_new_with_range(C.GtkOrientation(orientation),
		C.gdouble(min), C.gdouble(max), C.gdouble(step))

	if c == nil {
		return nil, nilPtrErr
	}
	return wrapScale(glib.Take(unsafe.Pointer(c))), nil
}

// TODO:
// gtk_scale_set_digits().

// SetDrawValue is a wrapper around gtk_scale_set_draw_value().
func (v *Scale) SetDrawValue(drawValue bool) {
	C.gtk_scale_set_draw_value(v.native(), gbool(drawValue))
}

// TODO:
// gtk_scale_set_has_origin().
// gtk_scale_set_value_pos().
// gtk_scale_get_digits().
// gtk_scale_get_draw_value().
// gtk_scale_get_has_origin().
// gtk_scale_get_value_pos().
// gtk_scale_get_layout().
// gtk_scale_get_layout_offsets().

// AddMark is a wrpaper around gtk_scale_add_mark.
func (v *Scale) AddMark(value float64, pos PositionType, markup string) {
	var markupchar *C.gchar
	if markup != "" {
		markupchar = (*C.gchar)(C.CString(markup))
		defer C.free(unsafe.Pointer(markupchar))
	}

	C.gtk_scale_add_mark(v.native(), C.gdouble(value), C.GtkPositionType(pos), markupchar)
}

// ClearMarks is a wrapper around gtk_scale_clear_marks.
func (v *Scale) ClearMarks() {
	C.gtk_scale_clear_marks(v.native())
}

/*
 * GtkScaleButton
 */

// ScaleButton is a representation of GTK's GtkScaleButton.
type ScaleButton struct {
	Button
}

// native returns a pointer to the underlying GtkScaleButton.
func (v *ScaleButton) native() *C.GtkScaleButton {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkScaleButton(p)
}

func marshalScaleButton(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapScaleButton(obj), nil
}

func wrapScaleButton(obj *glib.Object) *ScaleButton {
	if obj == nil {
		return nil
	}

	actionable := wrapActionable(obj)
	return &ScaleButton{Button{Bin{Container{Widget{glib.InitiallyUnowned{obj}}}}, actionable}}
}

// ScaleButtonNew is a wrapper around gtk_scale_button_new().
func ScaleButtonNew(size IconSize, min, max, step float64, icons []string) (*ScaleButton, error) {
	cicons := make([]*C.gchar, len(icons))
	for i, icon := range icons {
		cicons[i] = (*C.gchar)(C.CString(icon))
		defer C.free(unsafe.Pointer(cicons[i]))
	}
	cicons = append(cicons, nil)

	c := C.gtk_scale_button_new(C.GtkIconSize(size),
		C.gdouble(min),
		C.gdouble(max),
		C.gdouble(step),
		&cicons[0])
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapScaleButton(glib.Take(unsafe.Pointer(c))), nil
}

// GetPopup is a wrapper around gtk_scale_button_get_popup().
func (v *ScaleButton) GetPopup() (IWidget, error) {
	c := C.gtk_scale_button_get_popup(v.native())
	if c == nil {
		return nil, nilPtrErr
	}
	return castWidget(c)
}

// GetValue is a wrapper around gtk_scale_button_get_value().
func (v *ScaleButton) GetValue() float64 {
	return float64(C.gtk_scale_button_get_value(v.native()))
}

// SetValue is a wrapper around gtk_scale_button_set_value().
func (v *ScaleButton) SetValue(value float64) {
	C.gtk_scale_button_set_value(v.native(), C.gdouble(value))
}

// SetIcons is a wrapper around gtk_scale_button_set_icons().
func (v *ScaleButton) SetIcons() []string {
	var iconNames *C.gchar = nil
	C.gtk_scale_button_set_icons(v.native(), &iconNames)
	return toGoStringArray(&iconNames)
}

// GetAdjustment is a wrapper around gtk_scale_button_get_adjustment().
func (v *ScaleButton) GetAdjustment() *Adjustment {
	c := C.gtk_scale_button_get_adjustment(v.native())
	obj := glib.Take(unsafe.Pointer(c))
	return &Adjustment{glib.InitiallyUnowned{obj}}
}

// SetAdjustment is a wrapper around gtk_scale_button_set_adjustment().
func (v *ScaleButton) SetAdjustment(adjustment *Adjustment) {
	C.gtk_scale_button_set_adjustment(v.native(), adjustment.native())
}

// GetPlusButton is a wrapper around gtk_scale_button_get_plus_button().
func (v *ScaleButton) GetPlusButton() (IWidget, error) {
	c := C.gtk_scale_button_get_plus_button(v.native())
	if c == nil {
		return nil, nilPtrErr
	}
	return castWidget(c)
}

// GetMinusButton is a wrapper around gtk_scale_button_get_minus_button().
func (v *ScaleButton) GetMinusButton() (IWidget, error) {
	c := C.gtk_scale_button_get_minus_button(v.native())
	if c == nil {
		return nil, nilPtrErr
	}
	return castWidget(c)
}

/*
 * GtkScrollable
 */

// IScrollable is an interface type implemented by all structs
// embedding a Scrollable.  It is meant to be used as an argument type
// for wrapper functions that wrap around a C GTK function taking a
// GtkScrollable.
type IScrollable interface {
	toScrollable() *C.GtkScrollable
}

// Scrollable is a representation of GTK's GtkScrollable GInterface.
type Scrollable struct {
	*glib.Object
}

// native() returns a pointer to the underlying GObject as a GtkScrollable.
func (v *Scrollable) native() *C.GtkScrollable {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkScrollable(p)
}

func wrapScrollable(obj *glib.Object) *Scrollable {
	if obj == nil {
		return nil
	}

	return &Scrollable{obj}
}

func (v *Scrollable) toScrollable() *C.GtkScrollable {
	if v == nil {
		return nil
	}
	return v.native()
}

// SetHAdjustment is a wrapper around gtk_scrollable_set_hadjustment().
func (v *Scrollable) SetHAdjustment(adjustment *Adjustment) {
	C.gtk_scrollable_set_hadjustment(v.native(), adjustment.native())
}

// GetHAdjustment is a wrapper around gtk_scrollable_get_hadjustment().
func (v *Scrollable) GetHAdjustment() (*Adjustment, error) {
	c := C.gtk_scrollable_get_hadjustment(v.native())
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapAdjustment(glib.Take(unsafe.Pointer(c))), nil
}

// SetVAdjustment is a wrapper around gtk_scrollable_set_vadjustment().
func (v *Scrollable) SetVAdjustment(adjustment *Adjustment) {
	C.gtk_scrollable_set_vadjustment(v.native(), adjustment.native())
}

// GetVAdjustment is a wrapper around gtk_scrollable_get_vadjustment().
func (v *Scrollable) GetVAdjustment() (*Adjustment, error) {
	c := C.gtk_scrollable_get_vadjustment(v.native())
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapAdjustment(glib.Take(unsafe.Pointer(c))), nil
}

/*
 * GtkScrollbar
 */

// Scrollbar is a representation of GTK's GtkScrollbar.
type Scrollbar struct {
	Range
}

// native returns a pointer to the underlying GtkScrollbar.
func (v *Scrollbar) native() *C.GtkScrollbar {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkScrollbar(p)
}

func marshalScrollbar(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapScrollbar(obj), nil
}

func wrapScrollbar(obj *glib.Object) *Scrollbar {
	if obj == nil {
		return nil
	}

	return &Scrollbar{Range{Widget{glib.InitiallyUnowned{obj}}}}
}

// ScrollbarNew is a wrapper around gtk_scrollbar_new().
func ScrollbarNew(orientation Orientation, adjustment *Adjustment) (*Scrollbar, error) {
	c := C.gtk_scrollbar_new(C.GtkOrientation(orientation), adjustment.native())
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapScrollbar(glib.Take(unsafe.Pointer(c))), nil
}

/*
 * GtkScrolledWindow
 */

// ScrolledWindow is a representation of GTK's GtkScrolledWindow.
type ScrolledWindow struct {
	Bin
}

// native returns a pointer to the underlying GtkScrolledWindow.
func (v *ScrolledWindow) native() *C.GtkScrolledWindow {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkScrolledWindow(p)
}

func marshalScrolledWindow(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapScrolledWindow(obj), nil
}

func wrapScrolledWindow(obj *glib.Object) *ScrolledWindow {
	if obj == nil {
		return nil
	}

	return &ScrolledWindow{Bin{Container{Widget{glib.InitiallyUnowned{obj}}}}}
}

// ScrolledWindowNew() is a wrapper around gtk_scrolled_window_new().
func ScrolledWindowNew(hadjustment, vadjustment *Adjustment) (*ScrolledWindow, error) {
	c := C.gtk_scrolled_window_new(hadjustment.native(),
		vadjustment.native())
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapScrolledWindow(glib.Take(unsafe.Pointer(c))), nil
}

// GetPolicy() is a wrapper around gtk_scrolled_window_get_policy().
func (v *ScrolledWindow) GetPolicy() (hScrollbarPolicy, vScrollbarPolicy PolicyType) {
	var hScrPol, vScrPol C.GtkPolicyType
	C.gtk_scrolled_window_get_policy(v.native(), &hScrPol, &vScrPol)
	hScrollbarPolicy, vScrollbarPolicy = PolicyType(hScrPol), PolicyType(vScrPol)
	return
}

// SetPolicy() is a wrapper around gtk_scrolled_window_set_policy().
func (v *ScrolledWindow) SetPolicy(hScrollbarPolicy, vScrollbarPolicy PolicyType) {
	C.gtk_scrolled_window_set_policy(v.native(),
		C.GtkPolicyType(hScrollbarPolicy),
		C.GtkPolicyType(vScrollbarPolicy))
}

// GetHAdjustment() is a wrapper around gtk_scrolled_window_get_hadjustment().
func (v *ScrolledWindow) GetHAdjustment() *Adjustment {
	c := C.gtk_scrolled_window_get_hadjustment(v.native())
	if c == nil {
		return nil
	}
	return wrapAdjustment(glib.Take(unsafe.Pointer(c)))
}

// SetHAdjustment is a wrapper around gtk_scrolled_window_set_hadjustment().
func (v *ScrolledWindow) SetHAdjustment(adjustment *Adjustment) {
	C.gtk_scrolled_window_set_hadjustment(v.native(), adjustment.native())
}

// GetVAdjustment() is a wrapper around gtk_scrolled_window_get_vadjustment().
func (v *ScrolledWindow) GetVAdjustment() *Adjustment {
	c := C.gtk_scrolled_window_get_vadjustment(v.native())
	if c == nil {
		return nil
	}
	return wrapAdjustment(glib.Take(unsafe.Pointer(c)))
}

// SetVAdjustment is a wrapper around gtk_scrolled_window_set_vadjustment().
func (v *ScrolledWindow) SetVAdjustment(adjustment *Adjustment) {
	C.gtk_scrolled_window_set_vadjustment(v.native(), adjustment.native())
}

// GetHScrollbar is a wrapper around gtk_scrolled_window_get_hscrollbar().
func (v *ScrolledWindow) GetHScrollbar() *Scrollbar {
	c := C.gtk_scrolled_window_get_hscrollbar(v.native())
	if c == nil {
		return nil
	}
	return wrapScrollbar(glib.Take(unsafe.Pointer(c)))
}

// GetVScrollbar is a wrapper around gtk_scrolled_window_get_vscrollbar().
func (v *ScrolledWindow) GetVScrollbar() *Scrollbar {
	c := C.gtk_scrolled_window_get_vscrollbar(v.native())
	if c == nil {
		return nil
	}
	return wrapScrollbar(glib.Take(unsafe.Pointer(c)))
}

// GetPlacement is a wrapper around gtk_scrolled_window_get_placement().
func (v *ScrolledWindow) GetPlacement() CornerType {
	c := C.gtk_scrolled_window_get_placement(v.native())
	return CornerType(c)
}

// SetPlacement is a wrapper around gtk_scrolled_window_set_placement().
func (v *ScrolledWindow) SetPlacement(windowPlacement CornerType) {
	C.gtk_scrolled_window_set_placement(v.native(), C.GtkCornerType(windowPlacement))
}

// UnsetPlacement is a wrapper around gtk_scrolled_window_unset_placement().
func (v *ScrolledWindow) UnsetPlacement() {
	C.gtk_scrolled_window_unset_placement(v.native())
}

// GetShadowType is a wrapper around gtk_scrolled_window_get_shadow_type().
func (v *ScrolledWindow) GetShadowType() ShadowType {
	c := C.gtk_scrolled_window_get_shadow_type(v.native())
	return ShadowType(c)
}

// SetShadowType is a wrapper around gtk_scrolled_window_set_shadow_type().
func (v *ScrolledWindow) SetShadowType(t ShadowType) {
	C.gtk_scrolled_window_set_shadow_type(v.native(), C.GtkShadowType(t))
}

// GetKineticScrolling is a wrapper around gtk_scrolled_window_get_kinetic_scrolling().
func (v *ScrolledWindow) GetKineticScrolling() bool {
	c := C.gtk_scrolled_window_get_kinetic_scrolling(v.native())
	return gobool(c)
}

// SetKineticScrolling is a wrapper around gtk_scrolled_window_set_kinetic_scrolling().
func (v *ScrolledWindow) SetKineticScrolling(kineticScrolling bool) {
	C.gtk_scrolled_window_set_kinetic_scrolling(v.native(), gbool(kineticScrolling))
}

// GetCaptureButtonPress is a wrapper around gtk_scrolled_window_get_capture_button_press().
func (v *ScrolledWindow) GetCaptureButtonPress() bool {
	c := C.gtk_scrolled_window_get_capture_button_press(v.native())
	return gobool(c)
}

// SetCaptureButtonPress is a wrapper around gtk_scrolled_window_set_capture_button_press().
func (v *ScrolledWindow) SetCaptureButtonPress(captureButtonPress bool) {
	C.gtk_scrolled_window_set_capture_button_press(v.native(), gbool(captureButtonPress))
}

// GetMinContentWidth is a wrapper around gtk_scrolled_window_get_min_content_width().
func (v *ScrolledWindow) GetMinContentWidth() int {
	c := C.gtk_scrolled_window_get_min_content_width(v.native())
	return int(c)
}

// SetMinContentWidth is a wrapper around gtk_scrolled_window_set_min_content_width().
func (v *ScrolledWindow) SetMinContentWidth(width int) {
	C.gtk_scrolled_window_set_min_content_width(v.native(), C.gint(width))
}

// GetMinContentHeight is a wrapper around gtk_scrolled_window_get_min_content_height().
func (v *ScrolledWindow) GetMinContentHeight() int {
	c := C.gtk_scrolled_window_get_min_content_height(v.native())
	return int(c)
}

// SetMinContentHeight is a wrapper around gtk_scrolled_window_set_min_content_height().
func (v *ScrolledWindow) SetMinContentHeight(width int) {
	C.gtk_scrolled_window_set_min_content_height(v.native(), C.gint(width))
}

/*
 * GtkSearchEntry
 */

// SearchEntry is a reprensentation of GTK's GtkSearchEntry.
type SearchEntry struct {
	Entry
}

// native returns a pointer to the underlying GtkSearchEntry.
func (v *SearchEntry) native() *C.GtkSearchEntry {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkSearchEntry(p)
}

func marshalSearchEntry(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapSearchEntry(obj), nil
}

func wrapSearchEntry(obj *glib.Object) *SearchEntry {
	if obj == nil {
		return nil
	}

	e := wrapEditable(obj)
	ce := wrapCellEditable(obj)
	return &SearchEntry{Entry{Widget{glib.InitiallyUnowned{obj}}, *e, *ce}}
}

// SearchEntryNew is a wrapper around gtk_search_entry_new().
func SearchEntryNew() (*SearchEntry, error) {
	c := C.gtk_search_entry_new()
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapSearchEntry(glib.Take(unsafe.Pointer(c))), nil
}

/*
* GtkSelectionData
 */
type SelectionData struct {
	GtkSelectionData *C.GtkSelectionData
}

func marshalSelectionData(p uintptr) (interface{}, error) {
	c := C.g_value_get_boxed((*C.GValue)(unsafe.Pointer(p)))
	return (*SelectionData)(unsafe.Pointer(c)), nil
}

// native returns a pointer to the underlying GtkSelectionData.
func (v *SelectionData) native() *C.GtkSelectionData {
	if v == nil {
		return nil
	}

	// I don't understand why we need this, but we do.
	c := (*C.GValue)(unsafe.Pointer(v))
	p := (*C.GtkSelectionData)(unsafe.Pointer(c))
	return p
}

// GetLength is a wrapper around gtk_selection_data_get_length().
func (v *SelectionData) GetLength() int {
	return int(C.gtk_selection_data_get_length(v.native()))
}

// GetData is a wrapper around gtk_selection_data_get_data_with_length().
// It returns a slice of the correct size with the copy of the selection's data.
func (v *SelectionData) GetData() []byte {
	var length C.gint
	c := C.gtk_selection_data_get_data_with_length(v.native(), &length)

	// Only set if length is valid.
	if int(length) < 1 {
		return nil
	}

	var data []byte
	sliceHeader := (*reflect.SliceHeader)(unsafe.Pointer(&data))
	sliceHeader.Len = int(length)
	sliceHeader.Cap = int(length)
	sliceHeader.Data = uintptr(unsafe.Pointer(c))

	// Keep the SelectionData alive for as long as the byte slice is.
	runtime.SetFinalizer(&data, func(*[]byte) {
		runtime.KeepAlive(v)
	})

	return data
}

// SetData is a wrapper around gtk_selection_data_set_data_with_length().
func (v *SelectionData) SetData(atom gdk.Atom, data []byte) {
	C.gtk_selection_data_set(
		v.native(),
		C.GdkAtom(unsafe.Pointer(atom)),
		C.gint(8), (*C.guchar)(&data[0]), C.gint(len(data)),
	)
}

// GetText is a wrapper around gtk_selection_data_get_text(). It returns a copy
// of the string from SelectionData and frees the C reference.
func (v *SelectionData) GetText() string {
	charptr := C.gtk_selection_data_get_text(v.native())
	if charptr == nil {
		return ""
	}

	defer C.g_free(C.gpointer(charptr))

	return ucharString(charptr)
}

// SetText is a wrapper around gtk_selection_data_set_text().
func (v *SelectionData) SetText(text string) bool {
	textPtr := *(*[]byte)(unsafe.Pointer(&text))

	return gobool(C.gtk_selection_data_set_text(
		v.native(),
		// https://play.golang.org/p/PmGaLDhRuEU
		// This is probably safe since we expect Gdk to copy the string anyway.
		(*C.gchar)(unsafe.Pointer(&textPtr[0])), C.int(len(text)),
	))
}

// SetPixbuf is a wrapper around gtk_selection_data_set_pixbuf().
func (v *SelectionData) SetPixbuf(pixbuf *gdk.Pixbuf) bool {
	return gobool(C.gtk_selection_data_set_pixbuf(
		v.native(),
		(*C.GdkPixbuf)(unsafe.Pointer(pixbuf.Native())),
	))
}

// GetPixbuf is a wrapper around gtk_selection_data_get_pixbuf(). It returns nil
// if the data is a recognized image type that could be converted to a new
// Pixbuf.
func (v *SelectionData) GetPixbuf() *gdk.Pixbuf {
	c := C.gtk_selection_data_get_pixbuf(v.native())
	if c == nil {
		return nil
	}

	obj := &glib.Object{glib.ToGObject(unsafe.Pointer(c))}
	p := &gdk.Pixbuf{obj}
	runtime.SetFinalizer(p, func(_ interface{}) { glib.FinalizerStrategy(obj.Unref) })

	return p
}

// SetURIs is a wrapper around gtk_selection_data_set_uris().
func (v *SelectionData) SetURIs(uris []string) bool {
	var clist = C.make_strings(C.int(len(uris)))
	for i := range uris {
		cstring := C.CString(uris[i])
		// This defer will only run once the function exits, not once the loop
		// exits, so it's perfectly fine.
		defer C.free(unsafe.Pointer(cstring))

		C.set_string(clist, C.int(i), (*C.gchar)(cstring))
	}

	return gobool(C.gtk_selection_data_set_uris(v.native(), clist))
}

// GetURIs is a wrapper around gtk_selection_data_get_uris().
func (v *SelectionData) GetURIs() []string {
	uriPtrs := C.gtk_selection_data_get_uris(v.native())
	return toGoStringArray(uriPtrs)
}

func (v *SelectionData) free() {
	C.gtk_selection_data_free(v.native())
}

// DragSetIconPixbuf is used for the "drag-begin" event. It is a wrapper around
// gtk_drag_set_icon_pixbuf().
func DragSetIconPixbuf(context *gdk.DragContext, pixbuf *gdk.Pixbuf, hotX, hotY int) {
	ctx := unsafe.Pointer(context.Native())
	pix := unsafe.Pointer(pixbuf.Native())
	C.gtk_drag_set_icon_pixbuf((*C.GdkDragContext)(ctx), (*C.GdkPixbuf)(pix), C.gint(hotX), C.gint(hotY))
}

// DragSetIconWidget is a wrapper around gtk_drag_set_icon_widget().
func DragSetIconWidget(context *gdk.DragContext, w IWidget, hotX, hotY int) {
	ctx := unsafe.Pointer(context.Native())
	C.gtk_drag_set_icon_widget((*C.GdkDragContext)(ctx), w.toWidget(), C.gint(hotX), C.gint(hotY))
}

// DragSetIconSurface is a wrapper around gtk_drag_set_icon_surface().
func DragSetIconSurface(context *gdk.DragContext, surface *cairo.Surface) {
	ctx := unsafe.Pointer(context.Native())
	sur := unsafe.Pointer(surface.Native())
	C.gtk_drag_set_icon_surface((*C.GdkDragContext)(ctx), (*C.cairo_surface_t)(sur))
}

// DragSetIconName is a wrapper around gtk_drag_set_icon_name().
func DragSetIconName(context *gdk.DragContext, iconName string, hotX, hotY int) {
	ctx := unsafe.Pointer(context.Native())
	ico := (*C.gchar)(C.CString(iconName))
	defer C.free(unsafe.Pointer(ico))

	C.gtk_drag_set_icon_name((*C.GdkDragContext)(ctx), ico, C.gint(hotX), C.gint(hotY))
}

// DragSetIconDefault is a wrapper around gtk_drag_set_icon_default().
func DragSetIconDefault(context *gdk.DragContext) {
	ctx := unsafe.Pointer(context.Native())
	C.gtk_drag_set_icon_default((*C.GdkDragContext)(ctx))
}

/*
 * GtkSeparator
 */

// Separator is a representation of GTK's GtkSeparator.
type Separator struct {
	Widget
}

// native returns a pointer to the underlying GtkSeperator.
func (v *Separator) native() *C.GtkSeparator {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkSeparator(p)
}

func marshalSeparator(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapSeparator(obj), nil
}

func wrapSeparator(obj *glib.Object) *Separator {
	if obj == nil {
		return nil
	}

	return &Separator{Widget{glib.InitiallyUnowned{obj}}}
}

// SeparatorNew is a wrapper around gtk_separator_new().
func SeparatorNew(orientation Orientation) (*Separator, error) {
	c := C.gtk_separator_new(C.GtkOrientation(orientation))
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapSeparator(glib.Take(unsafe.Pointer(c))), nil
}

/*
 * GtkSeparatorMenuItem
 */

// SeparatorMenuItem is a representation of GTK's GtkSeparatorMenuItem.
type SeparatorMenuItem struct {
	MenuItem
}

// native returns a pointer to the underlying GtkSeparatorMenuItem.
func (v *SeparatorMenuItem) native() *C.GtkSeparatorMenuItem {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkSeparatorMenuItem(p)
}

func marshalSeparatorMenuItem(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapSeparatorMenuItem(obj), nil
}

func wrapSeparatorMenuItem(obj *glib.Object) *SeparatorMenuItem {
	if obj == nil {
		return nil
	}

	return &SeparatorMenuItem{MenuItem{Bin{Container{Widget{glib.InitiallyUnowned{obj}}}}}}
}

// SeparatorMenuItemNew is a wrapper around gtk_separator_menu_item_new().
func SeparatorMenuItemNew() (*SeparatorMenuItem, error) {
	c := C.gtk_separator_menu_item_new()
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapSeparatorMenuItem(glib.Take(unsafe.Pointer(c))), nil
}

/*
 * GtkSeparatorToolItem
 */

// SeparatorToolItem is a representation of GTK's GtkSeparatorToolItem.
type SeparatorToolItem struct {
	ToolItem
}

// native returns a pointer to the underlying GtkSeparatorToolItem.
func (v *SeparatorToolItem) native() *C.GtkSeparatorToolItem {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkSeparatorToolItem(p)
}

func marshalSeparatorToolItem(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapSeparatorToolItem(obj), nil
}

func wrapSeparatorToolItem(obj *glib.Object) *SeparatorToolItem {
	if obj == nil {
		return nil
	}

	return &SeparatorToolItem{ToolItem{Bin{Container{Widget{
		glib.InitiallyUnowned{obj}}}}}}
}

// SeparatorToolItemNew is a wrapper around gtk_separator_tool_item_new().
func SeparatorToolItemNew() (*SeparatorToolItem, error) {
	c := C.gtk_separator_tool_item_new()
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapSeparatorToolItem(glib.Take(unsafe.Pointer(c))), nil
}

// SetDraw is a wrapper around gtk_separator_tool_item_set_draw().
func (v *SeparatorToolItem) SetDraw(draw bool) {
	C.gtk_separator_tool_item_set_draw(v.native(), gbool(draw))
}

// GetDraw is a wrapper around gtk_separator_tool_item_get_draw().
func (v *SeparatorToolItem) GetDraw() bool {
	c := C.gtk_separator_tool_item_get_draw(v.native())
	return gobool(c)
}

/*
 * GtkSizeGroup
 */

// SizeGroup is a representation of GTK's GtkSizeGroup
type SizeGroup struct {
	*glib.Object
}

// native() returns a pointer to the underlying GtkSizeGroup
func (v *SizeGroup) native() *C.GtkSizeGroup {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkSizeGroup(p)
}

func marshalSizeGroup(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return &SizeGroup{obj}, nil
}

func wrapSizeGroup(obj *glib.Object) *SizeGroup {
	if obj == nil {
		return nil
	}

	return &SizeGroup{obj}
}

// SizeGroupNew is a wrapper around gtk_size_group_new().
func SizeGroupNew(mode SizeGroupMode) (*SizeGroup, error) {
	c := C.gtk_size_group_new(C.GtkSizeGroupMode(mode))
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapSizeGroup(glib.Take(unsafe.Pointer(c))), nil
}

func (v *SizeGroup) SetMode(mode SizeGroupMode) {
	C.gtk_size_group_set_mode(v.native(), C.GtkSizeGroupMode(mode))
}

func (v *SizeGroup) GetMode() SizeGroupMode {
	return SizeGroupMode(C.gtk_size_group_get_mode(v.native()))
}

func (v *SizeGroup) AddWidget(widget IWidget) {
	C.gtk_size_group_add_widget(v.native(), widget.toWidget())
}

func (v *SizeGroup) RemoveWidget(widget IWidget) {
	C.gtk_size_group_remove_widget(v.native(), widget.toWidget())
}

func (v *SizeGroup) GetWidgets() *glib.SList {
	c := C.gtk_size_group_get_widgets(v.native())
	if c == nil {
		return nil
	}

	// TODO: call DataWrapper on SList and wrap them to gtk.IWidget
	// see (v *Container) GetFocusChain()

	return glib.WrapSList(uintptr(unsafe.Pointer(c)))
}

/*
 * GtkSpinButton
 */

// SpinButton is a representation of GTK's GtkSpinButton.
type SpinButton struct {
	Entry
	Orientable
}

// native returns a pointer to the underlying GtkSpinButton.
func (v *SpinButton) native() *C.GtkSpinButton {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkSpinButton(p)
}

func marshalSpinButton(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapSpinButton(obj), nil
}

func wrapSpinButton(obj *glib.Object) *SpinButton {
	if obj == nil {
		return nil
	}

	e := wrapEditable(obj)
	ce := wrapCellEditable(obj)
	o := wrapOrientable(obj)
	return &SpinButton{Entry{Widget{glib.InitiallyUnowned{obj}}, *e, *ce}, *o}
}

// Configure is a wrapper around gtk_spin_button_configure().
func (v *SpinButton) Configure(adjustment *Adjustment, climbRate float64, digits uint) {
	C.gtk_spin_button_configure(v.native(), adjustment.native(),
		C.gdouble(climbRate), C.guint(digits))
}

// SpinButtonNew is a wrapper around gtk_spin_button_new().
func SpinButtonNew(adjustment *Adjustment, climbRate float64, digits uint) (*SpinButton, error) {
	c := C.gtk_spin_button_new(adjustment.native(),
		C.gdouble(climbRate), C.guint(digits))
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapSpinButton(glib.Take(unsafe.Pointer(c))), nil
}

// SpinButtonNewWithRange is a wrapper around gtk_spin_button_new_with_range().
func SpinButtonNewWithRange(min, max, step float64) (*SpinButton, error) {
	c := C.gtk_spin_button_new_with_range(C.gdouble(min), C.gdouble(max),
		C.gdouble(step))
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapSpinButton(glib.Take(unsafe.Pointer(c))), nil
}

// SetAdjustment() is a wrapper around gtk_spin_button_set_adjustment().
func (v *SpinButton) SetAdjustment(adjustment *Adjustment) {
	C.gtk_spin_button_set_adjustment(v.native(), adjustment.native())
}

// GetAdjustment() is a wrapper around gtk_spin_button_get_adjustment
func (v *SpinButton) GetAdjustment() *Adjustment {
	c := C.gtk_spin_button_get_adjustment(v.native())
	if c == nil {
		return nil
	}
	return wrapAdjustment(glib.Take(unsafe.Pointer(c)))
}

// SetDigits() is a wrapper around gtk_spin_button_set_digits().
func (v *SpinButton) SetDigits(digits uint) {
	C.gtk_spin_button_set_digits(v.native(), C.guint(digits))
}

// SetIncrements() is a wrapper around gtk_spin_button_set_increments().
func (v *SpinButton) SetIncrements(step, page float64) {
	C.gtk_spin_button_set_increments(v.native(), C.gdouble(step), C.gdouble(page))
}

// SetRange is a wrapper around gtk_spin_button_set_range().
func (v *SpinButton) SetRange(min, max float64) {
	C.gtk_spin_button_set_range(v.native(), C.gdouble(min), C.gdouble(max))
}

// SetValue() is a wrapper around gtk_spin_button_set_value().
func (v *SpinButton) SetValue(value float64) {
	C.gtk_spin_button_set_value(v.native(), C.gdouble(value))
}

// GetValue() is a wrapper around gtk_spin_button_get_value().
func (v *SpinButton) GetValue() float64 {
	c := C.gtk_spin_button_get_value(v.native())
	return float64(c)
}

// GetValueAsInt is a wrapper around gtk_spin_button_get_value_as_int().
func (v *SpinButton) GetValueAsInt() int {
	c := C.gtk_spin_button_get_value_as_int(v.native())
	return int(c)
}

// SetUpdatePolicy() is a wrapper around gtk_spin_button_set_update_policy().
func (v *SpinButton) SetUpdatePolicy(policy SpinButtonUpdatePolicy) {
	C.gtk_spin_button_set_update_policy(
		v.native(),
		C.GtkSpinButtonUpdatePolicy(policy))
}

// SetNumeric() is a wrapper around gtk_spin_button_set_numeric().
func (v *SpinButton) SetNumeric(numeric bool) {
	C.gtk_spin_button_set_numeric(v.native(), gbool(numeric))
}

// Spin() is a wrapper around gtk_spin_button_spin().
func (v *SpinButton) Spin(direction SpinType, increment float64) {
	C.gtk_spin_button_spin(
		v.native(),
		C.GtkSpinType(direction),
		C.gdouble(increment))
}

// gtk_spin_button_set_wrap().
// gtk_spin_button_set_snap_to_ticks().

// Update() is a wrapper around gtk_spin_button_update().
func (v *SpinButton) Update() {
	C.gtk_spin_button_update(v.native())
}

// GetDigits() is a wrapper around gtk_spin_button_get_digits().
func (v *SpinButton) GetDigits() uint {
	return uint(C.gtk_spin_button_get_digits(v.native()))
}

// gtk_spin_button_get_increments().
// gtk_spin_button_get_numeric().
// gtk_spin_button_get_range().
// gtk_spin_button_get_snap_to_ticks().

// GetUpdatePolicy() is a wrapper around gtk_spin_button_get_update_policy().
func (v *SpinButton) GetUpdatePolicy() SpinButtonUpdatePolicy {
	return SpinButtonUpdatePolicy(
		C.gtk_spin_button_get_update_policy(
			v.native()))
}

// gtk_spin_button_get_wrap().

/*
 * GtkSpinner
 */

// Spinner is a representation of GTK's GtkSpinner.
type Spinner struct {
	Widget
}

// native returns a pointer to the underlying GtkSpinner.
func (v *Spinner) native() *C.GtkSpinner {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkSpinner(p)
}

func marshalSpinner(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapSpinner(obj), nil
}

func wrapSpinner(obj *glib.Object) *Spinner {
	if obj == nil {
		return nil
	}

	return &Spinner{Widget{glib.InitiallyUnowned{obj}}}
}

// SpinnerNew is a wrapper around gtk_spinner_new().
func SpinnerNew() (*Spinner, error) {
	c := C.gtk_spinner_new()
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapSpinner(glib.Take(unsafe.Pointer(c))), nil
}

// Start is a wrapper around gtk_spinner_start().
func (v *Spinner) Start() {
	C.gtk_spinner_start(v.native())
}

// Stop is a wrapper around gtk_spinner_stop().
func (v *Spinner) Stop() {
	C.gtk_spinner_stop(v.native())
}

/*
 * GtkStatusbar
 */

// Statusbar is a representation of GTK's GtkStatusbar
type Statusbar struct {
	Box
}

// native returns a pointer to the underlying GtkStatusbar
func (v *Statusbar) native() *C.GtkStatusbar {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkStatusbar(p)
}

func marshalStatusbar(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapStatusbar(obj), nil
}

func wrapStatusbar(obj *glib.Object) *Statusbar {
	if obj == nil {
		return nil
	}

	return &Statusbar{Box{Container{Widget{glib.InitiallyUnowned{obj}}}}}
}

// StatusbarNew() is a wrapper around gtk_statusbar_new().
func StatusbarNew() (*Statusbar, error) {
	c := C.gtk_statusbar_new()
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapStatusbar(glib.Take(unsafe.Pointer(c))), nil
}

// GetContextId() is a wrapper around gtk_statusbar_get_context_id().
func (v *Statusbar) GetContextId(contextDescription string) uint {
	cstr := C.CString(contextDescription)
	defer C.free(unsafe.Pointer(cstr))
	c := C.gtk_statusbar_get_context_id(v.native(), (*C.gchar)(cstr))
	return uint(c)
}

// Push() is a wrapper around gtk_statusbar_push().
func (v *Statusbar) Push(contextID uint, text string) uint {
	cstr := C.CString(text)
	defer C.free(unsafe.Pointer(cstr))
	c := C.gtk_statusbar_push(v.native(), C.guint(contextID),
		(*C.gchar)(cstr))
	return uint(c)
}

// Pop() is a wrapper around gtk_statusbar_pop().
func (v *Statusbar) Pop(contextID uint) {
	C.gtk_statusbar_pop(v.native(), C.guint(contextID))
}

// GetMessageArea() is a wrapper around gtk_statusbar_get_message_area().
func (v *Statusbar) GetMessageArea() (*Box, error) {
	c := C.gtk_statusbar_get_message_area(v.native())
	if c == nil {
		return nil, nilPtrErr
	}
	obj := glib.Take(unsafe.Pointer(c))
	return &Box{Container{Widget{glib.InitiallyUnowned{obj}}}}, nil
}

// RemoveAll() is a wrapper around gtk_statusbar_remove_all()
func (v *Statusbar) RemoveAll(contextID uint) {
	C.gtk_statusbar_remove_all(v.native(), C.guint(contextID))
}

/*
 * GtkSwitch
 */

// Switch is a representation of GTK's GtkSwitch.
type Switch struct {
	Widget
}

// native returns a pointer to the underlying GtkSwitch.
func (v *Switch) native() *C.GtkSwitch {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkSwitch(p)
}

func marshalSwitch(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapSwitch(obj), nil
}

func wrapSwitch(obj *glib.Object) *Switch {
	if obj == nil {
		return nil
	}

	return &Switch{Widget{glib.InitiallyUnowned{obj}}}
}

// SwitchNew is a wrapper around gtk_switch_new().
func SwitchNew() (*Switch, error) {
	c := C.gtk_switch_new()
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapSwitch(glib.Take(unsafe.Pointer(c))), nil
}

// GetActive is a wrapper around gtk_switch_get_active().
func (v *Switch) GetActive() bool {
	c := C.gtk_switch_get_active(v.native())
	return gobool(c)
}

// SetActive is a wrapper around gtk_switch_set_active().
func (v *Switch) SetActive(isActive bool) {
	C.gtk_switch_set_active(v.native(), gbool(isActive))
}

/*
 * GtkTargetEntry
 */

// TargetEntry is a representation of GTK's GtkTargetEntry
type TargetEntry C.GtkTargetEntry

func marshalTargetEntry(p uintptr) (interface{}, error) {
	c := C.g_value_get_boxed((*C.GValue)(unsafe.Pointer(p)))
	return (*TargetEntry)(unsafe.Pointer(c)), nil
}

func (v *TargetEntry) native() *C.GtkTargetEntry {
	return (*C.GtkTargetEntry)(unsafe.Pointer(v))
}

// TargetEntryNew is a wrapper around gtk_target_entry_new().
func TargetEntryNew(target string, flags TargetFlags, info uint) (*TargetEntry, error) {
	cstr := C.CString(target)
	defer C.free(unsafe.Pointer(cstr))
	c := C.gtk_target_entry_new((*C.gchar)(cstr), C.guint(flags), C.guint(info))
	if c == nil {
		return nil, nilPtrErr
	}
	t := (*TargetEntry)(unsafe.Pointer(c))
	// causes setFinilizer error
	//  runtime.SetFinalizer(t, func(v *TargetEntry) { glib.FinalizerStrategy(v.free) })
	return t, nil
}

func (v *TargetEntry) free() {
	C.gtk_target_entry_free(v.native())
}

/*
 * GtkTextTag
 */

type TextTag struct {
	*glib.Object
}

// native returns a pointer to the underlying GObject as a GtkTextTag.
func (v *TextTag) native() *C.GtkTextTag {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkTextTag(p)
}

func marshalTextTag(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapTextTag(obj), nil
}

func wrapTextTag(obj *glib.Object) *TextTag {
	if obj == nil {
		return nil
	}

	return &TextTag{obj}
}

// TextTagNew is a wrapper around gtk_text_tag_new(). If name is empty, then the
// tag is anonymous.
func TextTagNew(name string) (*TextTag, error) {
	var gchar *C.gchar
	if name != "" {
		gchar = (*C.gchar)(C.CString(name))
		defer C.free(unsafe.Pointer(gchar))
	}

	c := C.gtk_text_tag_new(gchar)
	if c == nil {
		return nil, nilPtrErr
	}

	return wrapTextTag(glib.Take(unsafe.Pointer(c))), nil
}

// GetPriority() is a wrapper around gtk_text_tag_get_priority().
func (v *TextTag) GetPriority() int {
	return int(C.gtk_text_tag_get_priority(v.native()))
}

// SetPriority() is a wrapper around gtk_text_tag_set_priority().
func (v *TextTag) SetPriority(priority int) {
	C.gtk_text_tag_set_priority(v.native(), C.gint(priority))
}

// Event() is a wrapper around gtk_text_tag_event().
func (v *TextTag) Event(eventObject *glib.Object, event *gdk.Event, iter *TextIter) bool {
	ok := C.gtk_text_tag_event(v.native(),
		(*C.GObject)(unsafe.Pointer(eventObject.Native())),
		(*C.GdkEvent)(unsafe.Pointer(event.Native())),
		(*C.GtkTextIter)(iter),
	)
	return gobool(ok)
}

/*
 * GtkTextTagTable
 */

type TextTagTable struct {
	*glib.Object
}

// native returns a pointer to the underlying GObject as a GtkTextTagTable.
func (v *TextTagTable) native() *C.GtkTextTagTable {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkTextTagTable(p)
}

func marshalTextTagTable(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapTextTagTable(obj), nil
}

func wrapTextTagTable(obj *glib.Object) *TextTagTable {
	if obj == nil {
		return nil
	}

	return &TextTagTable{obj}
}

func TextTagTableNew() (*TextTagTable, error) {
	c := C.gtk_text_tag_table_new()
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapTextTagTable(glib.Take(unsafe.Pointer(c))), nil
}

// Add() is a wrapper around gtk_text_tag_table_add().
func (v *TextTagTable) Add(tag *TextTag) {
	C.gtk_text_tag_table_add(v.native(), tag.native())
	//return gobool(c) // TODO version-separate
}

// Lookup() is a wrapper around gtk_text_tag_table_lookup().
func (v *TextTagTable) Lookup(name string) (*TextTag, error) {
	cname := C.CString(name)
	defer C.free(unsafe.Pointer(cname))
	c := C.gtk_text_tag_table_lookup(v.native(), (*C.gchar)(cname))
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapTextTag(glib.Take(unsafe.Pointer(c))), nil
}

// Remove() is a wrapper around gtk_text_tag_table_remove().
func (v *TextTagTable) Remove(tag *TextTag) {
	C.gtk_text_tag_table_remove(v.native(), tag.native())
}

/*
 * GtkTextBuffer
 */

// TextBuffer is a representation of GTK's GtkTextBuffer.
type TextBuffer struct {
	*glib.Object
}

// native returns a pointer to the underlying GtkTextBuffer.
func (v *TextBuffer) native() *C.GtkTextBuffer {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkTextBuffer(p)
}

func marshalTextBuffer(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapTextBuffer(obj), nil
}

func wrapTextBuffer(obj *glib.Object) *TextBuffer {
	if obj == nil {
		return nil
	}

	return &TextBuffer{obj}
}

// TextBufferNew() is a wrapper around gtk_text_buffer_new().
func TextBufferNew(table *TextTagTable) (*TextBuffer, error) {
	c := C.gtk_text_buffer_new(table.native())
	if c == nil {
		return nil, nilPtrErr
	}

	e := wrapTextBuffer(glib.Take(unsafe.Pointer(c)))
	return e, nil
}

// ApplyTag() is a wrapper around gtk_text_buffer_apply_tag().
func (v *TextBuffer) ApplyTag(tag *TextTag, start, end *TextIter) {
	C.gtk_text_buffer_apply_tag(v.native(), tag.native(), (*C.GtkTextIter)(start), (*C.GtkTextIter)(end))
}

// ApplyTagByName() is a wrapper around gtk_text_buffer_apply_tag_by_name().
func (v *TextBuffer) ApplyTagByName(name string, start, end *TextIter) {
	cstr := C.CString(name)
	defer C.free(unsafe.Pointer(cstr))
	C.gtk_text_buffer_apply_tag_by_name(v.native(), (*C.gchar)(cstr),
		(*C.GtkTextIter)(start), (*C.GtkTextIter)(end))
}

// SelectRange is a wrapper around gtk_text_buffer_select_range.
func (v *TextBuffer) SelectRange(start, end *TextIter) {
	C.gtk_text_buffer_select_range(v.native(), (*C.GtkTextIter)(start), (*C.GtkTextIter)(end))
}

// CreateChildAnchor() is a wrapper around gtk_text_buffer_create_child_anchor().
// Since it copies garbage from the stack into the padding bytes of iter,
// iter can't be reliably reused after this call unless GODEBUG=cgocheck=0.
func (v *TextBuffer) CreateChildAnchor(iter *TextIter) (*TextChildAnchor, error) {
	c := C.gtk_text_buffer_create_child_anchor(v.native(), iter.native())
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapTextChildAnchor(glib.Take(unsafe.Pointer(c))), nil
}

// Delete() is a wrapper around gtk_text_buffer_delete().
func (v *TextBuffer) Delete(start, end *TextIter) {
	C.gtk_text_buffer_delete(v.native(), (*C.GtkTextIter)(start), (*C.GtkTextIter)(end))
}

func (v *TextBuffer) GetBounds() (start, end *TextIter) {
	start, end = new(TextIter), new(TextIter)
	C.gtk_text_buffer_get_bounds(v.native(), (*C.GtkTextIter)(start), (*C.GtkTextIter)(end))
	return
}

// GetCharCount() is a wrapper around gtk_text_buffer_get_char_count().
func (v *TextBuffer) GetCharCount() int {
	return int(C.gtk_text_buffer_get_char_count(v.native()))
}

// GetIterAtOffset() is a wrapper around gtk_text_buffer_get_iter_at_offset().
func (v *TextBuffer) GetIterAtOffset(charOffset int) *TextIter {
	var iter C.GtkTextIter
	C.gtk_text_buffer_get_iter_at_offset(v.native(), &iter, C.gint(charOffset))
	return (*TextIter)(&iter)
}

// GetIterAtLine() is a wrapper around gtk_text_buffer_get_iter_at_line().
func (v *TextBuffer) GetIterAtLine(line int) *TextIter {
	var iter C.GtkTextIter
	C.gtk_text_buffer_get_iter_at_line(v.native(), &iter, C.gint(line))
	return (*TextIter)(&iter)
}

// GetStartIter() is a wrapper around gtk_text_buffer_get_start_iter().
func (v *TextBuffer) GetStartIter() *TextIter {
	var iter C.GtkTextIter
	C.gtk_text_buffer_get_start_iter(v.native(), &iter)
	return (*TextIter)(&iter)
}

// GetEndIter() is a wrapper around gtk_text_buffer_get_end_iter().
func (v *TextBuffer) GetEndIter() *TextIter {
	var iter C.GtkTextIter
	C.gtk_text_buffer_get_end_iter(v.native(), &iter)
	return (*TextIter)(&iter)
}

// GetLineCount() is a wrapper around gtk_text_buffer_get_line_count().
func (v *TextBuffer) GetLineCount() int {
	return int(C.gtk_text_buffer_get_line_count(v.native()))
}

// GetModified() is a wrapper around gtk_text_buffer_get_modified().
func (v *TextBuffer) GetModified() bool {
	return gobool(C.gtk_text_buffer_get_modified(v.native()))
}

// GetTagTable() is a wrapper around gtk_text_buffer_get_tag_table().
func (v *TextBuffer) GetTagTable() (*TextTagTable, error) {
	c := C.gtk_text_buffer_get_tag_table(v.native())
	if c == nil {
		return nil, nilPtrErr
	}
	obj := glib.Take(unsafe.Pointer(c))
	return wrapTextTagTable(obj), nil
}

func (v *TextBuffer) GetText(start, end *TextIter, includeHiddenChars bool) (string, error) {
	c := C.gtk_text_buffer_get_text(
		v.native(), (*C.GtkTextIter)(start), (*C.GtkTextIter)(end), gbool(includeHiddenChars),
	)
	if c == nil {
		return "", nilPtrErr
	}
	gostr := goString(c)
	C.g_free(C.gpointer(c))
	return gostr, nil
}

// Insert() is a wrapper around gtk_text_buffer_insert().
func (v *TextBuffer) Insert(iter *TextIter, text string) {
	cstr := C.CString(text)
	defer C.free(unsafe.Pointer(cstr))
	C.gtk_text_buffer_insert(v.native(), (*C.GtkTextIter)(iter), (*C.gchar)(cstr), C.gint(len(text)))
}

// InsertPixbuf() is a wrapper around gtk_text_buffer_insert_pixbuf().
func (v *TextBuffer) InsertPixbuf(iter *TextIter, pixbuf *gdk.Pixbuf) {
	C.gtk_text_buffer_insert_pixbuf(v.native(), (*C.GtkTextIter)(iter),
		(*C.GdkPixbuf)(unsafe.Pointer(pixbuf.Native())))
}

// InsertAtCursor() is a wrapper around gtk_text_buffer_insert_at_cursor().
func (v *TextBuffer) InsertAtCursor(text string) {
	cstr := C.CString(text)
	defer C.free(unsafe.Pointer(cstr))
	C.gtk_text_buffer_insert_at_cursor(v.native(), (*C.gchar)(cstr), C.gint(len(text)))
}

// InsertWithTag() is a wrapper around gtk_text_buffer_insert_with_tags() that supports only one tag
// as cgo does not support functions with variable-argument lists (see https://github.com/golang/go/issues/975)
func (v *TextBuffer) InsertWithTag(iter *TextIter, text string, tag *TextTag) {
	cstr := C.CString(text)
	defer C.free(unsafe.Pointer(cstr))
	C._gtk_text_buffer_insert_with_tag(v.native(), (*C.GtkTextIter)(iter), (*C.gchar)(cstr), C.gint(len(text)), tag.native())
}

// InsertWithTagByName() is a wrapper around gtk_text_buffer_insert_with_tags_by_name() that supports only one tag
// as cgo does not support functions with variable-argument lists (see https://github.com/golang/go/issues/975)
func (v *TextBuffer) InsertWithTagByName(iter *TextIter, text string, tagName string) {
	cstr := C.CString(text)
	defer C.free(unsafe.Pointer(cstr))
	ctag := C.CString(tagName)
	defer C.free(unsafe.Pointer(ctag))
	C._gtk_text_buffer_insert_with_tag_by_name(v.native(), (*C.GtkTextIter)(iter), (*C.gchar)(cstr), C.gint(len(text)), (*C.gchar)(ctag))
}

// RemoveTag() is a wrapper around gtk_text_buffer_remove_tag().
func (v *TextBuffer) RemoveTag(tag *TextTag, start, end *TextIter) {
	C.gtk_text_buffer_remove_tag(v.native(), tag.native(), (*C.GtkTextIter)(start), (*C.GtkTextIter)(end))
}

// RemoveAllTags() is a wrapper around gtk_text_buffer_remove_all_tags().
func (v *TextBuffer) RemoveAllTags(start, end *TextIter) {
	C.gtk_text_buffer_remove_all_tags(v.native(), (*C.GtkTextIter)(start), (*C.GtkTextIter)(end))
}

// SetModified() is a wrapper around gtk_text_buffer_set_modified().
func (v *TextBuffer) SetModified(setting bool) {
	C.gtk_text_buffer_set_modified(v.native(), gbool(setting))
}

func (v *TextBuffer) SetText(text string) {
	cstr := C.CString(text)
	defer C.free(unsafe.Pointer(cstr))
	C.gtk_text_buffer_set_text(v.native(), (*C.gchar)(cstr),
		C.gint(len(text)))
}

// GetIterAtMark() is a wrapper around gtk_text_buffer_get_iter_at_mark().
func (v *TextBuffer) GetIterAtMark(mark *TextMark) *TextIter {
	var iter C.GtkTextIter
	C.gtk_text_buffer_get_iter_at_mark(v.native(), &iter, mark.native())
	return (*TextIter)(&iter)
}

// CreateMark() is a wrapper around gtk_text_buffer_create_mark().
func (v *TextBuffer) CreateMark(mark_name string, where *TextIter, left_gravity bool) *TextMark {
	cstr := C.CString(mark_name)
	defer C.free(unsafe.Pointer(cstr))
	ret := C.gtk_text_buffer_create_mark(v.native(), (*C.gchar)(cstr), (*C.GtkTextIter)(where), gbool(left_gravity))
	return wrapTextMark(glib.Take(unsafe.Pointer(ret)))
}

// GetMark() is a wrapper around gtk_text_buffer_get_mark().
func (v *TextBuffer) GetMark(mark_name string) *TextMark {
	cstr := C.CString(mark_name)
	defer C.free(unsafe.Pointer(cstr))
	ret := C.gtk_text_buffer_get_mark(v.native(), (*C.gchar)(cstr))
	return wrapTextMark(glib.Take(unsafe.Pointer(ret)))
}

// DeleteMark() is a wrapper around gtk_text_buffer_delete_mark()
func (v *TextBuffer) DeleteMark(mark *TextMark) {
	C.gtk_text_buffer_delete_mark(v.native(), mark.native())
}

// DeleteMarkByName() is a wrapper around  gtk_text_buffer_delete_mark_by_name()
func (v *TextBuffer) DeleteMarkByName(name string) {
	cstr := C.CString(name)
	defer C.free(unsafe.Pointer(cstr))
	C.gtk_text_buffer_delete_mark_by_name(v.native(), (*C.gchar)(cstr))
}

// PlaceCursor() is a wrapper around gtk_text_buffer_place_cursor()
func (v *TextBuffer) PlaceCursor(iter *TextIter) {
	C.gtk_text_buffer_place_cursor(v.native(), (*C.GtkTextIter)(iter))
}

// GetHasSelection() is a variant solution around gtk_text_buffer_get_has_selection().
func (v *TextBuffer) GetHasSelection() bool {
	value, _ := v.GetProperty("has-selection")
	return value.(bool)
}

// DeleteSelection() is a wrapper around gtk_text_buffer_delete_selection().
func (v *TextBuffer) DeleteSelection(interactive, defaultEditable bool) bool {
	return gobool(C.gtk_text_buffer_delete_selection(v.native(), gbool(interactive), gbool(defaultEditable)))
}

// GetSelectionBound() is a wrapper around gtk_text_buffer_get_selection_bound().
func (v *TextBuffer) GetSelectionBound() *TextMark {
	ret := C.gtk_text_buffer_get_selection_bound(v.native())
	return wrapTextMark(glib.Take(unsafe.Pointer(ret)))
}

// GetSelectionBounds() is a wrapper around gtk_text_buffer_get_selection_bounds().
func (v *TextBuffer) GetSelectionBounds() (start, end *TextIter, ok bool) {
	start, end = new(TextIter), new(TextIter)
	cbool := C.gtk_text_buffer_get_selection_bounds(v.native(), (*C.GtkTextIter)(start), (*C.GtkTextIter)(end))
	return start, end, gobool(cbool)
}

// GetIterAtLineOffset() is a wrapper around gtk_text_buffer_get_iter_at_line_offset().
func (v *TextBuffer) GetIterAtLineOffset(lineNumber, charOffset int) (iter *TextIter) {
	iter = new(TextIter)
	C.gtk_text_buffer_get_iter_at_line_offset(v.native(), (*C.GtkTextIter)(iter), (C.gint)(lineNumber), (C.gint)(charOffset))
	return
}

// CreateTag() is a variant solution around gtk_text_buffer_create_tag().
func (v *TextBuffer) CreateTag(name string, props map[string]interface{}) (tag *TextTag) {
	var err error
	var tagTable *TextTagTable
	if tag, err = TextTagNew(name); err == nil {
		if tagTable, err = v.GetTagTable(); err == nil {
			tagTable.Add(tag)
			for p, v := range props {
				if err = tag.SetProperty(p, v); err != nil {
					err = errors.New(fmt.Sprintf("%s, %v: %v\n", err.Error(), p, v))
					break
				}
			}
		}
	}
	if err != nil {
		fmt.Println(err.Error())
	}
	return
}

// RemoveTagByName() is a wrapper around  gtk_text_buffer_remove_tag_by_name()
func (v *TextBuffer) RemoveTagByName(name string, start, end *TextIter) {
	cstr := C.CString(name)
	defer C.free(unsafe.Pointer(cstr))
	C.gtk_text_buffer_remove_tag_by_name(v.native(), (*C.gchar)(cstr), (*C.GtkTextIter)(start), (*C.GtkTextIter)(end))
}

// InsertMarkup() is a wrapper around  gtk_text_buffer_register_serialize_tagset()
func (v *TextBuffer) RegisterSerializeTagset(tagsetName string) gdk.Atom {
	cstr := C.CString(tagsetName)
	if len(tagsetName) == 0 {
		cstr = nil
	}
	defer C.free(unsafe.Pointer(cstr))
	c := C.gtk_text_buffer_register_serialize_tagset(v.native(), (*C.gchar)(cstr))
	return gdk.Atom(uintptr(unsafe.Pointer(c)))
}

// RegisterDeserializeTagset() is a wrapper around  gtk_text_buffer_register_deserialize_tagset()
func (v *TextBuffer) RegisterDeserializeTagset(tagsetName string) gdk.Atom {
	cstr := C.CString(tagsetName)
	if len(tagsetName) == 0 {
		cstr = nil
	}
	defer C.free(unsafe.Pointer(cstr))
	c := C.gtk_text_buffer_register_deserialize_tagset(v.native(), (*C.gchar)(cstr))
	return gdk.Atom(uintptr(unsafe.Pointer(c)))
}

// Serialize() is a wrapper around  gtk_text_buffer_serialize()
func (v *TextBuffer) Serialize(contentBuffer *TextBuffer, format gdk.Atom, start, end *TextIter) string {
	var length = new(C.gsize)
	ptr := C.gtk_text_buffer_serialize(v.native(), contentBuffer.native(), C.GdkAtom(unsafe.Pointer(format)),
		(*C.GtkTextIter)(start), (*C.GtkTextIter)(end), length)
	return C.GoStringN((*C.char)(unsafe.Pointer(ptr)), (C.int)(*length))
}

// Deserialize() is a wrapper around  gtk_text_buffer_deserialize()
func (v *TextBuffer) Deserialize(contentBuffer *TextBuffer, format gdk.Atom, iter *TextIter, data []byte) (ok bool, err error) {
	var length = (C.gsize)(len(data))
	var cerr *C.GError = nil
	cbool := C.gtk_text_buffer_deserialize(v.native(), contentBuffer.native(), C.GdkAtom(unsafe.Pointer(format)),
		(*C.GtkTextIter)(iter), (*C.guint8)(unsafe.Pointer(&data[0])), length, &cerr)
	if !gobool(cbool) {
		defer C.g_error_free(cerr)
		return false, errors.New(goString(cerr.message))
	}
	return gobool(cbool), nil
}

// GetInsert() is a wrapper around gtk_text_buffer_get_insert().
func (v *TextBuffer) GetInsert() *TextMark {
	ret := C.gtk_text_buffer_get_insert(v.native())
	return wrapTextMark(glib.Take(unsafe.Pointer(ret)))
}

// CopyClipboard() is a wrapper around gtk_text_buffer_copy_clipboard().
func (v *TextBuffer) CopyClipboard(clipboard *Clipboard) {
	C.gtk_text_buffer_copy_clipboard(v.native(), clipboard.native())
}

// CutClipboard() is a wrapper around gtk_text_buffer_cut_clipboard().
func (v *TextBuffer) CutClipboard(clipboard *Clipboard, defaultEditable bool) {
	C.gtk_text_buffer_cut_clipboard(v.native(), clipboard.native(), gbool(defaultEditable))
}

// PasteClipboard() is a wrapper around gtk_text_buffer_paste_clipboard().
func (v *TextBuffer) PasteClipboard(clipboard *Clipboard, overrideLocation *TextIter, defaultEditable bool) {
	C.gtk_text_buffer_paste_clipboard(v.native(), clipboard.native(), (*C.GtkTextIter)(overrideLocation), gbool(defaultEditable))
}

// AddSelectionClipboard() is a wrapper around gtk_text_buffer_add_selection_clipboard().
func (v *TextBuffer) AddSelectionClipboard(clipboard *Clipboard) {
	C.gtk_text_buffer_add_selection_clipboard(v.native(), clipboard.native())
}

// RemoveSelectionClipboard() is a wrapper around gtk_text_buffer_remove_selection_clipboard().
func (v *TextBuffer) RemoveSelectionClipboard(clipboard *Clipboard) {
	C.gtk_text_buffer_remove_selection_clipboard(v.native(), clipboard.native())
}

// GetIterAtLineIndex() is a wrapper around gtk_text_buffer_get_iter_at_line_index().
func (v *TextBuffer) GetIterAtLineIndex(lineNumber, charIndex int) (iter *TextIter) {
	iter = new(TextIter)
	C.gtk_text_buffer_get_iter_at_line_index(v.native(), (*C.GtkTextIter)(iter), (C.gint)(lineNumber), (C.gint)(charIndex))
	return
}

// InsertInteractiveAtCursor() is a wrapper around gtk_text_buffer_insert_interactive_at_cursor().
func (v *TextBuffer) InsertInteractiveAtCursor(text string, editable bool) bool {
	cstr := C.CString(text)
	defer C.free(unsafe.Pointer(cstr))

	return gobool(C.gtk_text_buffer_insert_interactive_at_cursor(
		v.native(),
		(*C.gchar)(cstr),
		C.gint(len(text)),
		gbool(editable)))
}

// InsertInteractive() is a wrapper around gtk_text_buffer_insert_interactive().
func (v *TextBuffer) InsertInteractive(iter *TextIter, text string, editable bool) bool {
	cstr := C.CString(text)
	defer C.free(unsafe.Pointer(cstr))

	return gobool(C.gtk_text_buffer_insert_interactive(
		v.native(),
		(*C.GtkTextIter)(iter),
		(*C.gchar)(cstr),
		C.gint(len(text)),
		gbool(editable)))
}

// InsertRangeInteractive() is a wrapper around gtk_text_buffer_insert_range_interactive().
func (v *TextBuffer) InsertRangeInteractive(iter, start, end *TextIter, editable bool) bool {

	return gobool(C.gtk_text_buffer_insert_range_interactive(
		v.native(),
		(*C.GtkTextIter)(iter),
		(*C.GtkTextIter)(start),
		(*C.GtkTextIter)(end),
		gbool(editable)))
}

// InsertRange() is a wrapper around gtk_text_buffer_insert_range().
func (v *TextBuffer) InsertRange(iter, start, end *TextIter) {

	C.gtk_text_buffer_insert_range(
		v.native(),
		(*C.GtkTextIter)(iter),
		(*C.GtkTextIter)(start),
		(*C.GtkTextIter)(end))
}

// DeleteInteractive() is a wrapper around gtk_text_buffer_delete_interactive().
func (v *TextBuffer) DeleteInteractive(start, end *TextIter, editable bool) bool {

	return gobool(C.gtk_text_buffer_delete_interactive(
		v.native(),
		(*C.GtkTextIter)(start),
		(*C.GtkTextIter)(end),
		gbool(editable)))
}

// BeginUserAction() is a wrapper around gtk_text_buffer_begin_user_action().
func (v *TextBuffer) BeginUserAction() {

	C.gtk_text_buffer_begin_user_action(v.native())
}

// EndUserAction() is a wrapper around gtk_text_buffer_end_user_action().
func (v *TextBuffer) EndUserAction() {

	C.gtk_text_buffer_end_user_action(v.native())
}

/*
 * GtkToggleButton
 */

// ToggleButton is a representation of GTK's GtkToggleButton.
type ToggleButton struct {
	Button
}

// native returns a pointer to the underlying GtkToggleButton.
func (v *ToggleButton) native() *C.GtkToggleButton {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkToggleButton(p)
}

func marshalToggleButton(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapToggleButton(obj), nil
}

func wrapToggleButton(obj *glib.Object) *ToggleButton {
	if obj == nil {
		return nil
	}

	actionable := wrapActionable(obj)
	return &ToggleButton{Button{Bin{Container{Widget{
		glib.InitiallyUnowned{obj}}}}, actionable}}
}

// ToggleButtonNew is a wrapper around gtk_toggle_button_new().
func ToggleButtonNew() (*ToggleButton, error) {
	c := C.gtk_toggle_button_new()
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapToggleButton(glib.Take(unsafe.Pointer(c))), nil
}

// ToggleButtonNewWithLabel is a wrapper around
// gtk_toggle_button_new_with_label().
func ToggleButtonNewWithLabel(label string) (*ToggleButton, error) {
	cstr := C.CString(label)
	defer C.free(unsafe.Pointer(cstr))
	c := C.gtk_toggle_button_new_with_label((*C.gchar)(cstr))
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapToggleButton(glib.Take(unsafe.Pointer(c))), nil
}

// ToggleButtonNewWithMnemonic is a wrapper around
// gtk_toggle_button_new_with_mnemonic().
func ToggleButtonNewWithMnemonic(label string) (*ToggleButton, error) {
	cstr := C.CString(label)
	defer C.free(unsafe.Pointer(cstr))
	c := C.gtk_toggle_button_new_with_mnemonic((*C.gchar)(cstr))
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapToggleButton(glib.Take(unsafe.Pointer(c))), nil
}

// GetActive is a wrapper around gtk_toggle_button_get_active().
func (v *ToggleButton) GetActive() bool {
	c := C.gtk_toggle_button_get_active(v.native())
	return gobool(c)
}

// SetActive is a wrapper around gtk_toggle_button_set_active().
func (v *ToggleButton) SetActive(isActive bool) {
	C.gtk_toggle_button_set_active(v.native(), gbool(isActive))
}

// GetMode is a wrapper around gtk_toggle_button_get_mode().
func (v *ToggleButton) GetMode() bool {
	c := C.gtk_toggle_button_get_mode(v.native())
	return gobool(c)
}

// SetMode is a wrapper around gtk_toggle_button_set_mode().
func (v *ToggleButton) SetMode(drawIndicator bool) {
	C.gtk_toggle_button_set_mode(v.native(), gbool(drawIndicator))
}

// Toggled is a wrapper around gtk_toggle_button_toggled().
func (v *ToggleButton) Toggled() {
	C.gtk_toggle_button_toggled(v.native())
}

// GetInconsistent gtk_toggle_button_get_inconsistent().
func (v *ToggleButton) GetInconsistent() bool {
	c := C.gtk_toggle_button_get_inconsistent(v.native())
	return gobool(c)
}

// SetInconsistent gtk_toggle_button_set_inconsistent().
func (v *ToggleButton) SetInconsistent(setting bool) {
	C.gtk_toggle_button_set_inconsistent(v.native(), gbool(setting))
}

/*
 * GtkToolbar
 */

// Toolbar is a representation of GTK's GtkToolbar.
type Toolbar struct {
	Container
}

// native returns a pointer to the underlying GtkToolbar.
func (v *Toolbar) native() *C.GtkToolbar {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkToolbar(p)
}

func marshalToolbar(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapToolbar(obj), nil
}

func wrapToolbar(obj *glib.Object) *Toolbar {
	if obj == nil {
		return nil
	}

	return &Toolbar{Container{Widget{glib.InitiallyUnowned{obj}}}}
}

// ToolbarNew is a wrapper around gtk_toolbar_new().
func ToolbarNew() (*Toolbar, error) {
	c := C.gtk_toolbar_new()
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapToolbar(glib.Take(unsafe.Pointer(c))), nil
}

// Insert is a wrapper around gtk_toolbar_insert().
func (v *Toolbar) Insert(item IToolItem, pos int) {
	C.gtk_toolbar_insert(v.native(), item.toToolItem(), C.gint(pos))
}

// GetItemIndex is a wrapper around gtk_toolbar_get_item_index().
func (v *Toolbar) GetItemIndex(item IToolItem) int {
	c := C.gtk_toolbar_get_item_index(v.native(), item.toToolItem())
	return int(c)
}

// GetNItems is a wrapper around gtk_toolbar_get_n_items().
func (v *Toolbar) GetNItems() int {
	c := C.gtk_toolbar_get_n_items(v.native())
	return int(c)
}

// GetNthItem is a wrapper around gtk_toolbar_get_nth_item().
func (v *Toolbar) GetNthItem(n int) *ToolItem {
	c := C.gtk_toolbar_get_nth_item(v.native(), C.gint(n))
	if c == nil {
		return nil
	}
	return wrapToolItem(glib.Take(unsafe.Pointer(c)))
}

// GetDropIndex is a wrapper around gtk_toolbar_get_drop_index().
func (v *Toolbar) GetDropIndex(x, y int) int {
	c := C.gtk_toolbar_get_drop_index(v.native(), C.gint(x), C.gint(y))
	return int(c)
}

// SetDropHighlightItem is a wrapper around gtk_toolbar_set_drop_highlight_item().
func (v *Toolbar) SetDropHighlightItem(toolItem IToolItem, index int) {
	C.gtk_toolbar_set_drop_highlight_item(v.native(),
		toolItem.toToolItem(), C.gint(index))
}

// SetShowArrow is a wrapper around gtk_toolbar_set_show_arrow().
func (v *Toolbar) SetShowArrow(showArrow bool) {
	C.gtk_toolbar_set_show_arrow(v.native(), gbool(showArrow))
}

// UnsetIconSize is a wrapper around gtk_toolbar_unset_icon_size().
func (v *Toolbar) UnsetIconSize() {
	C.gtk_toolbar_unset_icon_size(v.native())
}

// GetShowArrow is a wrapper around gtk_toolbar_get_show_arrow().
func (v *Toolbar) GetShowArrow() bool {
	c := C.gtk_toolbar_get_show_arrow(v.native())
	return gobool(c)
}

// GetStyle is a wrapper around gtk_toolbar_get_style().
func (v *Toolbar) GetStyle() ToolbarStyle {
	c := C.gtk_toolbar_get_style(v.native())
	return ToolbarStyle(c)
}

// GetIconSize is a wrapper around gtk_toolbar_get_icon_size().
func (v *Toolbar) GetIconSize() IconSize {
	c := C.gtk_toolbar_get_icon_size(v.native())
	return IconSize(c)
}

// GetReliefStyle is a wrapper around gtk_toolbar_get_relief_style().
func (v *Toolbar) GetReliefStyle() ReliefStyle {
	c := C.gtk_toolbar_get_relief_style(v.native())
	return ReliefStyle(c)
}

// SetStyle is a wrapper around gtk_toolbar_set_style().
func (v *Toolbar) SetStyle(style ToolbarStyle) {
	C.gtk_toolbar_set_style(v.native(), C.GtkToolbarStyle(style))
}

// SetIconSize is a wrapper around gtk_toolbar_set_icon_size().
func (v *Toolbar) SetIconSize(iconSize IconSize) {
	C.gtk_toolbar_set_icon_size(v.native(), C.GtkIconSize(iconSize))
}

// UnsetStyle is a wrapper around gtk_toolbar_unset_style().
func (v *Toolbar) UnsetStyle() {
	C.gtk_toolbar_unset_style(v.native())
}

/*
 * GtkToolButton
 */

// ToolButton is a representation of GTK's GtkToolButton.
type ToolButton struct {
	ToolItem
}

// native returns a pointer to the underlying GtkToolButton.
func (v *ToolButton) native() *C.GtkToolButton {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkToolButton(p)
}

func marshalToolButton(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapToolButton(obj), nil
}

func wrapToolButton(obj *glib.Object) *ToolButton {
	if obj == nil {
		return nil
	}

	return &ToolButton{ToolItem{Bin{Container{Widget{
		glib.InitiallyUnowned{obj}}}}}}
}

// ToolButtonNew is a wrapper around gtk_tool_button_new().
func ToolButtonNew(iconWidget IWidget, label string) (*ToolButton, error) {
	cstr := C.CString(label)
	defer C.free(unsafe.Pointer(cstr))
	w := nullableWidget(iconWidget)
	c := C.gtk_tool_button_new(w, (*C.gchar)(cstr))
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapToolButton(glib.Take(unsafe.Pointer(c))), nil
}

// SetLabel is a wrapper around gtk_tool_button_set_label().
func (v *ToolButton) SetLabel(label string) {
	cstr := C.CString(label)
	defer C.free(unsafe.Pointer(cstr))
	C.gtk_tool_button_set_label(v.native(), (*C.gchar)(cstr))
}

// GetLabel is a wrapper around gtk_tool_button_get_label().
func (v *ToolButton) GetLabel() string {
	c := C.gtk_tool_button_get_label(v.native())
	return goString(c)
}

// SetUseUnderline is a wrapper around gtk_tool_button_set_use_underline().
func (v *ToolButton) SetGetUnderline(useUnderline bool) {
	C.gtk_tool_button_set_use_underline(v.native(), gbool(useUnderline))
}

// GetUseUnderline is a wrapper around gtk_tool_button_get_use_underline().
func (v *ToolButton) GetuseUnderline() bool {
	c := C.gtk_tool_button_get_use_underline(v.native())
	return gobool(c)
}

// SetIconName is a wrapper around gtk_tool_button_set_icon_name().
func (v *ToolButton) SetIconName(iconName string) {
	cstr := C.CString(iconName)
	defer C.free(unsafe.Pointer(cstr))
	C.gtk_tool_button_set_icon_name(v.native(), (*C.gchar)(cstr))
}

// GetIconName is a wrapper around gtk_tool_button_get_icon_name().
func (v *ToolButton) GetIconName() string {
	c := C.gtk_tool_button_get_icon_name(v.native())
	return goString(c)
}

// SetIconWidget is a wrapper around gtk_tool_button_set_icon_widget().
func (v *ToolButton) SetIconWidget(iconWidget IWidget) {
	C.gtk_tool_button_set_icon_widget(v.native(), iconWidget.toWidget())
}

// GetIconWidget is a wrapper around gtk_tool_button_get_icon_widget().
func (v *ToolButton) GetIconWidget() (IWidget, error) {
	c := C.gtk_tool_button_get_icon_widget(v.native())
	if c == nil {
		return nil, nil
	}
	return castWidget(c)
}

// SetLabelWidget is a wrapper around gtk_tool_button_set_label_widget().
func (v *ToolButton) SetLabelWidget(labelWidget IWidget) {
	C.gtk_tool_button_set_label_widget(v.native(), labelWidget.toWidget())
}

// GetLabelWidget is a wrapper around gtk_tool_button_get_label_widget().
func (v *ToolButton) GetLabelWidget() (IWidget, error) {
	c := C.gtk_tool_button_get_label_widget(v.native())
	if c == nil {
		return nil, nil
	}
	return castWidget(c)
}

/*
 * GtkToggleToolButton
 */

// ToggleToolButton is a representation of GTK's GtkToggleToolButton.
type ToggleToolButton struct {
	ToolButton
}

// native returns a pointer to the underlying GtkToggleToolButton.
func (v *ToggleToolButton) native() *C.GtkToggleToolButton {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkToggleToolButton(p)
}

func marshalToggleToolButton(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapToggleToolButton(obj), nil
}

func wrapToggleToolButton(obj *glib.Object) *ToggleToolButton {
	if obj == nil {
		return nil
	}

	return &ToggleToolButton{ToolButton{ToolItem{Bin{Container{Widget{
		glib.InitiallyUnowned{obj}}}}}}}
}

// ToggleToolButtonNew is a wrapper around gtk_toggle_tool_button_new().
func ToggleToolButtonNew() (*ToggleToolButton, error) {
	c := C.gtk_toggle_tool_button_new()
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapToggleToolButton(glib.Take(unsafe.Pointer(c))), nil
}

// GetActive is a wrapper around gtk_toggle_tool_button_get_active().
func (v *ToggleToolButton) GetActive() bool {
	c := C.gtk_toggle_tool_button_get_active(v.native())
	return gobool(c)
}

// SetActive is a wrapper around gtk_toggle_tool_button_set_active().
func (v *ToggleToolButton) SetActive(isActive bool) {
	C.gtk_toggle_tool_button_set_active(v.native(), gbool(isActive))
}

/*
 * GtkToolItem
 */

// ToolItem is a representation of GTK's GtkToolItem.
type ToolItem struct {
	Bin
}

// IToolItem is an interface type implemented by all structs embedding
// a ToolItem.  It is meant to be used as an argument type for wrapper
// functions that wrap around a C GTK function taking a GtkToolItem.
type IToolItem interface {
	toToolItem() *C.GtkToolItem
}

// native returns a pointer to the underlying GtkToolItem.
func (v *ToolItem) native() *C.GtkToolItem {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkToolItem(p)
}

func (v *ToolItem) toToolItem() *C.GtkToolItem {
	return v.native()
}

func marshalToolItem(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapToolItem(obj), nil
}

func wrapToolItem(obj *glib.Object) *ToolItem {
	if obj == nil {
		return nil
	}

	return &ToolItem{Bin{Container{Widget{glib.InitiallyUnowned{obj}}}}}
}

// ToolItemNew is a wrapper around gtk_tool_item_new().
func ToolItemNew() (*ToolItem, error) {
	c := C.gtk_tool_item_new()
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapToolItem(glib.Take(unsafe.Pointer(c))), nil
}

// SetHomogeneous is a wrapper around gtk_tool_item_set_homogeneous().
func (v *ToolItem) SetHomogeneous(homogeneous bool) {
	C.gtk_tool_item_set_homogeneous(v.native(), gbool(homogeneous))
}

// GetHomogeneous is a wrapper around gtk_tool_item_get_homogeneous().
func (v *ToolItem) GetHomogeneous() bool {
	c := C.gtk_tool_item_get_homogeneous(v.native())
	return gobool(c)
}

// SetExpand is a wrapper around gtk_tool_item_set_expand().
func (v *ToolItem) SetExpand(expand bool) {
	C.gtk_tool_item_set_expand(v.native(), gbool(expand))
}

// GetExpand is a wrapper around gtk_tool_item_get_expand().
func (v *ToolItem) GetExpand() bool {
	c := C.gtk_tool_item_get_expand(v.native())
	return gobool(c)
}

// SetTooltipText is a wrapper around gtk_tool_item_set_tooltip_text().
func (v *ToolItem) SetTooltipText(text string) {
	cstr := C.CString(text)
	defer C.free(unsafe.Pointer(cstr))
	C.gtk_tool_item_set_tooltip_text(v.native(), (*C.gchar)(cstr))
}

// SetTooltipMarkup is a wrapper around gtk_tool_item_set_tooltip_markup().
func (v *ToolItem) SetTooltipMarkup(text string) {
	cstr := C.CString(text)
	defer C.free(unsafe.Pointer(cstr))
	C.gtk_tool_item_set_tooltip_markup(v.native(), (*C.gchar)(cstr))
}

// SetUseDragWindow is a wrapper around gtk_tool_item_set_use_drag_window().
func (v *ToolItem) SetUseDragWindow(useDragWindow bool) {
	C.gtk_tool_item_set_use_drag_window(v.native(), gbool(useDragWindow))
}

// GetUseDragWindow is a wrapper around gtk_tool_item_get_use_drag_window().
func (v *ToolItem) GetUseDragWindow() bool {
	c := C.gtk_tool_item_get_use_drag_window(v.native())
	return gobool(c)
}

// SetVisibleHorizontal is a wrapper around gtk_tool_item_set_visible_horizontal().
func (v *ToolItem) SetVisibleHorizontal(visibleHorizontal bool) {
	C.gtk_tool_item_set_visible_horizontal(v.native(),
		gbool(visibleHorizontal))
}

// GetVisibleHorizontal is a wrapper around gtk_tool_item_get_visible_horizontal().
func (v *ToolItem) GetVisibleHorizontal() bool {
	c := C.gtk_tool_item_get_visible_horizontal(v.native())
	return gobool(c)
}

// SetVisibleVertical is a wrapper around gtk_tool_item_set_visible_vertical().
func (v *ToolItem) SetVisibleVertical(visibleVertical bool) {
	C.gtk_tool_item_set_visible_vertical(v.native(), gbool(visibleVertical))
}

// GetVisibleVertical is a wrapper around gtk_tool_item_get_visible_vertical().
func (v *ToolItem) GetVisibleVertical() bool {
	c := C.gtk_tool_item_get_visible_vertical(v.native())
	return gobool(c)
}

// SetIsImportant is a wrapper around gtk_tool_item_set_is_important().
func (v *ToolItem) SetIsImportant(isImportant bool) {
	C.gtk_tool_item_set_is_important(v.native(), gbool(isImportant))
}

// GetIsImportant is a wrapper around gtk_tool_item_get_is_important().
func (v *ToolItem) GetIsImportant() bool {
	c := C.gtk_tool_item_get_is_important(v.native())
	return gobool(c)
}

// TODO: gtk_tool_item_get_ellipsize_mode

// GetIconSize is a wrapper around gtk_tool_item_get_icon_size().
func (v *ToolItem) GetIconSize() IconSize {
	c := C.gtk_tool_item_get_icon_size(v.native())
	return IconSize(c)
}

// GetOrientation is a wrapper around gtk_tool_item_get_orientation().
func (v *ToolItem) GetOrientation() Orientation {
	c := C.gtk_tool_item_get_orientation(v.native())
	return Orientation(c)
}

// GetToolbarStyle is a wrapper around gtk_tool_item_get_toolbar_style().
func (v *ToolItem) GetToolbarStyle() ToolbarStyle {
	c := C.gtk_tool_item_get_toolbar_style(v.native())
	return ToolbarStyle(c)
}

// GetReliefStyle is a wrapper around gtk_tool_item_get_relief_style().
func (v *ToolItem) GetReliefStyle() ReliefStyle {
	c := C.gtk_tool_item_get_relief_style(v.native())
	return ReliefStyle(c)
}

// GetTextAlignment is a wrapper around gtk_tool_item_get_text_alignment().
func (v *ToolItem) GetTextAlignment() float32 {
	c := C.gtk_tool_item_get_text_alignment(v.native())
	return float32(c)
}

// GetTextOrientation is a wrapper around gtk_tool_item_get_text_orientation().
func (v *ToolItem) GetTextOrientation() Orientation {
	c := C.gtk_tool_item_get_text_orientation(v.native())
	return Orientation(c)
}

// RetrieveProxyMenuItem is a wrapper around gtk_tool_item_retrieve_proxy_menu_item()
func (v *ToolItem) RetrieveProxyMenuItem() *MenuItem {
	c := C.gtk_tool_item_retrieve_proxy_menu_item(v.native())
	if c == nil {
		return nil
	}
	return wrapMenuItem(glib.Take(unsafe.Pointer(c)))
}

// TODO:
// gtk_tool_item_get_proxy_menu_item().

// SetProxyMenuItem is a wrapper around gtk_tool_item_set_proxy_menu_item().
func (v *ToolItem) SetProxyMenuItem(menuItemId string, menuItem IMenuItem) {
	cstr := C.CString(menuItemId)
	defer C.free(unsafe.Pointer(cstr))
	C.gtk_tool_item_set_proxy_menu_item(v.native(), (*C.gchar)(cstr),
		C.toGtkWidget(unsafe.Pointer(menuItem.toMenuItem())))
}

// RebuildMenu is a wrapper around gtk_tool_item_rebuild_menu().
func (v *ToolItem) RebuildMenu() {
	C.gtk_tool_item_rebuild_menu(v.native())
}

// ToolbarReconfigured is a wrapper around gtk_tool_item_toolbar_reconfigured().
func (v *ToolItem) ToolbarReconfigured() {
	C.gtk_tool_item_toolbar_reconfigured(v.native())
}

// TODO: gtk_tool_item_get_text_size_group

/*
 * GtkToolItemGroup
 */

// TODO:
// gtk_tool_item_group_get_collapsed().
// gtk_tool_item_group_get_drop_item().
// gtk_tool_item_group_get_ellipsize().
// gtk_tool_item_group_get_item_position().
// gtk_tool_item_group_get_n_items().
// gtk_tool_item_group_get_label().
// gtk_tool_item_group_get_label_widget().
// gtk_tool_item_group_get_nth_item().
// gtk_tool_item_group_get_header_relief().
// gtk_tool_item_group_insert().
// gtk_tool_item_group_new().
// gtk_tool_item_group_set_collapsed().
// gtk_tool_item_group_set_ellipsize().
// gtk_tool_item_group_set_item_position().
// gtk_tool_item_group_set_label().
// gtk_tool_item_group_set_label_widget().
// gtk_tool_item_group_set_header_relief().

/*
 * GtkToolPalette
 */

// TODO:
// gtk_tool_palette_new().
// gtk_tool_palette_get_exclusive().
// gtk_tool_palette_set_exclusive().
// gtk_tool_palette_get_expand().
// gtk_tool_palette_set_expand().
// gtk_tool_palette_get_group_position().
// gtk_tool_palette_set_group_position().
// gtk_tool_palette_get_icon_size().
// gtk_tool_palette_set_icon_size().
// gtk_tool_palette_unset_icon_size().
// gtk_tool_palette_get_style().
// gtk_tool_palette_set_style().
// gtk_tool_palette_unset_style().
// gtk_tool_palette_add_drag_dest().
// gtk_tool_palette_get_drag_item().
// gtk_tool_palette_get_drag_target_group().
// gtk_tool_palette_get_drag_target_item().
// gtk_tool_palette_get_drop_group().
// gtk_tool_palette_get_drop_item().
// gtk_tool_palette_set_drag_source().
// GtkToolPaletteDragTargets

/*
 * GtkTreeIter
 */

// TreeIter is a representation of GTK's GtkTreeIter.
type TreeIter struct {
	GtkTreeIter C.GtkTreeIter
}

// native returns a pointer to the underlying GtkTreeIter.
func (v *TreeIter) native() *C.GtkTreeIter {
	if v == nil {
		return nil
	}
	return &v.GtkTreeIter
}

func marshalTreeIter(p uintptr) (interface{}, error) {
	c := C.g_value_get_boxed((*C.GValue)(unsafe.Pointer(p)))
	return (*TreeIter)(unsafe.Pointer(c)), nil
}

func (v *TreeIter) free() {
	C.gtk_tree_iter_free(v.native())
}

// Copy() is a wrapper around gtk_tree_iter_copy().
//
// Caution: when this method is used together with selection.GetSelectedRows(),
// it might cause random crash issue. See issue #590 and #610.
func (v *TreeIter) Copy() (*TreeIter, error) {
	c := C.gtk_tree_iter_copy(v.native())
	if c == nil {
		return nil, nilPtrErr
	}
	t := &TreeIter{*c}
	runtime.SetFinalizer(t, func(v *TreeIter) { glib.FinalizerStrategy(v.free) })
	return t, nil
}

/*
 * GtkTreeModel
 */

// TreeModel is a representation of GTK's GtkTreeModel GInterface.
type TreeModel struct {
	*glib.Object
}

// ITreeModel is an interface type implemented by all structs
// embedding a TreeModel.  It is meant to be used as an argument type
// for wrapper functions that wrap around a C GTK function taking a
// GtkTreeModel.
type ITreeModel interface {
	toTreeModel() *C.GtkTreeModel
	ToTreeModel() *TreeModel
}

// native returns a pointer to the underlying GObject as a GtkTreeModel.
func (v *TreeModel) native() *C.GtkTreeModel {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkTreeModel(p)
}

func (v *TreeModel) toTreeModel() *C.GtkTreeModel {
	if v == nil {
		return nil
	}
	return v.native()
}

func marshalTreeModel(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapTreeModel(obj), nil
}

func wrapTreeModel(obj *glib.Object) *TreeModel {
	if obj == nil {
		return nil
	}

	return &TreeModel{obj}
}

// ToTreeModel is a helper getter, e.g.: it returns *gtk.TreeStore/ListStore as a *gtk.TreeModel.
// In other cases, where you have a gtk.ITreeModel, use the type assertion.
func (v *TreeModel) ToTreeModel() *TreeModel {
	return v
}

// GetFlags() is a wrapper around gtk_tree_model_get_flags().
func (v *TreeModel) GetFlags() TreeModelFlags {
	c := C.gtk_tree_model_get_flags(v.native())
	return TreeModelFlags(c)
}

// GetNColumns() is a wrapper around gtk_tree_model_get_n_columns().
func (v *TreeModel) GetNColumns() int {
	c := C.gtk_tree_model_get_n_columns(v.native())
	return int(c)
}

// GetColumnType() is a wrapper around gtk_tree_model_get_column_type().
func (v *TreeModel) GetColumnType(index int) glib.Type {
	c := C.gtk_tree_model_get_column_type(v.native(), C.gint(index))
	return glib.Type(c)
}

// GetIter() is a wrapper around gtk_tree_model_get_iter().
func (v *TreeModel) GetIter(path *TreePath) (*TreeIter, error) {
	var iter C.GtkTreeIter
	c := C.gtk_tree_model_get_iter(v.native(), &iter, path.native())
	if !gobool(c) {
		return nil, errors.New("Unable to set iterator")
	}
	t := &TreeIter{iter}
	return t, nil
}

// GetIterFromString() is a wrapper around
// gtk_tree_model_get_iter_from_string().
func (v *TreeModel) GetIterFromString(path string) (*TreeIter, error) {
	var iter C.GtkTreeIter
	cstr := C.CString(path)
	defer C.free(unsafe.Pointer(cstr))
	c := C.gtk_tree_model_get_iter_from_string(v.native(), &iter,
		(*C.gchar)(cstr))
	if !gobool(c) {
		return nil, errors.New("Unable to set iterator")
	}
	t := &TreeIter{iter}
	return t, nil
}

// GetIterFirst() is a wrapper around gtk_tree_model_get_iter_first().
func (v *TreeModel) GetIterFirst() (*TreeIter, bool) {
	var iter C.GtkTreeIter
	c := C.gtk_tree_model_get_iter_first(v.native(), &iter)
	if !gobool(c) {
		return nil, false
	}
	t := &TreeIter{iter}
	return t, true
}

// GetPath() is a wrapper around gtk_tree_model_get_path().
func (v *TreeModel) GetPath(iter *TreeIter) (*TreePath, error) {
	c := C.gtk_tree_model_get_path(v.native(), iter.native())
	if c == nil {
		return nil, nilPtrErr
	}
	p := &TreePath{c}
	runtime.SetFinalizer(p, func(v *TreePath) { glib.FinalizerStrategy(v.free) })
	return p, nil
}

// GetStringFromIter() is a wrapper around gtk_tree_model_get_string_from_iter().
func (v *TreeModel) GetStringFromIter(iter *TreeIter) string {
	c := C.gtk_tree_model_get_string_from_iter(v.native(), iter.native())
	s := goString(c)
	defer C.g_free((C.gpointer)(c))
	return s
}

// GetValue() is a wrapper around gtk_tree_model_get_value().
func (v *TreeModel) GetValue(iter *TreeIter, column int) (*glib.Value, error) {
	val, err := glib.ValueAlloc()
	if err != nil {
		return nil, err
	}
	C.gtk_tree_model_get_value(
		v.native(),
		iter.native(),
		C.gint(column),
		(*C.GValue)(unsafe.Pointer(val.Native())))
	return val, nil
}

// IterHasChild() is a wrapper around gtk_tree_model_iter_has_child().
func (v *TreeModel) IterHasChild(iter *TreeIter) bool {
	c := C.gtk_tree_model_iter_has_child(v.native(), iter.native())
	return gobool(c)
}

// IterNext() is a wrapper around gtk_tree_model_iter_next().
func (v *TreeModel) IterNext(iter *TreeIter) bool {
	c := C.gtk_tree_model_iter_next(v.native(), iter.native())
	return gobool(c)
}

// IterPrevious is a wrapper around gtk_tree_model_iter_previous().
func (v *TreeModel) IterPrevious(iter *TreeIter) bool {
	c := C.gtk_tree_model_iter_previous(v.native(), iter.native())
	return gobool(c)
}

// IterParent is a wrapper around gtk_tree_model_iter_parent().
func (v *TreeModel) IterParent(iter, child *TreeIter) bool {
	c := C.gtk_tree_model_iter_parent(v.native(), iter.native(), child.native())
	return gobool(c)
}

// IterNthChild is a wrapper around gtk_tree_model_iter_nth_child().
func (v *TreeModel) IterNthChild(iter *TreeIter, parent *TreeIter, n int) bool {
	c := C.gtk_tree_model_iter_nth_child(v.native(), iter.native(), parent.native(), C.gint(n))
	return gobool(c)
}

// IterChildren is a wrapper around gtk_tree_model_iter_children().
func (v *TreeModel) IterChildren(iter, child *TreeIter) bool {
	var cIter, cChild *C.GtkTreeIter
	if iter != nil {
		cIter = iter.native()
	}
	cChild = child.native()
	c := C.gtk_tree_model_iter_children(v.native(), cChild, cIter)
	return gobool(c)
}

// IterNChildren is a wrapper around gtk_tree_model_iter_n_children().
func (v *TreeModel) IterNChildren(iter *TreeIter) int {
	var cIter *C.GtkTreeIter
	if iter != nil {
		cIter = iter.native()
	}
	c := C.gtk_tree_model_iter_n_children(v.native(), cIter)
	return int(c)
}

// FilterNew is a wrapper around gtk_tree_model_filter_new().
func (v *TreeModel) FilterNew(root *TreePath) (*TreeModelFilter, error) {
	c := C.gtk_tree_model_filter_new(v.native(), root.native())
	if c == nil {
		return nil, nilPtrErr
	}
	obj := glib.Take(unsafe.Pointer(c))
	return wrapTreeModelFilter(obj), nil
}

// TreeModelForeachFunc defines the function prototype for the foreach function (f arg) for
// (* TreeModel).ForEach
type TreeModelForeachFunc func(model *TreeModel, path *TreePath, iter *TreeIter) bool

// ForEach() is a wrapper around gtk_tree_model_foreach ()
func (v *TreeModel) ForEach(f TreeModelForeachFunc) {
	id := callback.Assign(f)
	defer callback.Delete(id)

	C._gtk_tree_model_foreach(v.toTreeModel(), C.gpointer(id))
}

/*
 * GtkTreeModelFilter
 */

// TreeModelFilter is a representation of GTK's GtkTreeModelFilter.
type TreeModelFilter struct {
	*glib.Object

	// Interfaces
	TreeModel
}

func (v *TreeModelFilter) native() *C.GtkTreeModelFilter {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkTreeModelFilter(p)
}

func (v *TreeModelFilter) toTreeModelFilter() *C.GtkTreeModelFilter {
	if v == nil {
		return nil
	}
	return v.native()
}

func marshalTreeModelFilter(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapTreeModelFilter(obj), nil
}

func wrapTreeModelFilter(obj *glib.Object) *TreeModelFilter {
	if obj == nil {
		return nil
	}

	tm := wrapTreeModel(obj)
	return &TreeModelFilter{obj, *tm}
}

// SetVisibleColumn is a wrapper around gtk_tree_model_filter_set_visible_column().
func (v *TreeModelFilter) SetVisibleColumn(column int) {
	C.gtk_tree_model_filter_set_visible_column(v.native(), C.gint(column))
}

// ConvertChildPathToPath is a wrapper around gtk_tree_model_filter_convert_child_path_to_path().
func (v *TreeModelFilter) ConvertChildPathToPath(childPath *TreePath) *TreePath {
	path := C.gtk_tree_model_filter_convert_child_path_to_path(v.native(), childPath.native())
	if path == nil {
		return nil
	}
	p := &TreePath{path}
	runtime.SetFinalizer(p, func(v *TreePath) { glib.FinalizerStrategy(v.free) })
	return p
}

// ConvertChildIterToIter is a wrapper around gtk_tree_model_filter_convert_child_iter_to_iter().
func (v *TreeModelFilter) ConvertChildIterToIter(childIter *TreeIter) (*TreeIter, bool) {
	var iter C.GtkTreeIter
	ok := gobool(C.gtk_tree_model_filter_convert_child_iter_to_iter(v.native(), &iter, childIter.native()))
	t := &TreeIter{iter}
	return t, ok
}

// ConvertIterToChildIter is a wrapper around gtk_tree_model_filter_convert_child_iter_to_iter().
func (v *TreeModelFilter) ConvertIterToChildIter(filterIter *TreeIter) *TreeIter {
	var iter C.GtkTreeIter
	C.gtk_tree_model_filter_convert_iter_to_child_iter(v.native(), &iter, filterIter.native())
	t := &TreeIter{iter}
	return t
}

// ConvertPathToChildPath is a wrapper around gtk_tree_model_filter_convert_path_to_child_path().
func (v *TreeModelFilter) ConvertPathToChildPath(filterPath *TreePath) *TreePath {
	path := C.gtk_tree_model_filter_convert_path_to_child_path(v.native(), filterPath.native())
	if path == nil {
		return nil
	}
	p := &TreePath{path}
	runtime.SetFinalizer(p, func(v *TreePath) { glib.FinalizerStrategy(v.free) })
	return p
}

// Refilter is a wrapper around gtk_tree_model_filter_refilter().
func (v *TreeModelFilter) Refilter() {
	C.gtk_tree_model_filter_refilter(v.native())
}

// TreeModelFilterVisibleFunc defines the function prototype for the filter visibility function (f arg)
// to TreeModelFilter.SetVisibleFunc.
type TreeModelFilterVisibleFunc func(model *TreeModel, iter *TreeIter) bool

// SetVisibleFunc is a wrapper around gtk_tree_model_filter_set_visible_func().
func (v *TreeModelFilter) SetVisibleFunc(f TreeModelFilterVisibleFunc) {
	C._gtk_tree_model_filter_set_visible_func(v.native(), C.gpointer(callback.Assign(f)))
}

// Down() is a wrapper around gtk_tree_path_down()
func (v *TreePath) Down() {
	C.gtk_tree_path_down(v.native())
}

// IsAncestor() is a wrapper around gtk_tree_path_is_ancestor()
func (v *TreePath) IsAncestor(descendant *TreePath) bool {
	return gobool(C.gtk_tree_path_is_ancestor(v.native(), descendant.native()))
}

// IsDescendant() is a wrapper around gtk_tree_path_is_descendant()
func (v *TreePath) IsDescendant(ancestor *TreePath) bool {
	return gobool(C.gtk_tree_path_is_descendant(v.native(), ancestor.native()))
}

/*
 * GtkTreePath
 */

// TreePath is a representation of GTK's GtkTreePath.
type TreePath struct {
	GtkTreePath *C.GtkTreePath
}

// Return a TreePath from the GList
func TreePathFromList(list *glib.List) *TreePath {
	if list == nil {
		return nil
	}
	return &TreePath{(*C.GtkTreePath)(list.Data().(unsafe.Pointer))}
}

// native returns a pointer to the underlying GtkTreePath.
func (v *TreePath) native() *C.GtkTreePath {
	if v == nil {
		return nil
	}
	return v.GtkTreePath
}

func marshalTreePath(p uintptr) (interface{}, error) {
	c := C.g_value_get_boxed((*C.GValue)(unsafe.Pointer(p)))
	return &TreePath{(*C.GtkTreePath)(unsafe.Pointer(c))}, nil
}

func (v *TreePath) free() {
	C.gtk_tree_path_free(v.native())
}

// GetIndices is a wrapper around gtk_tree_path_get_indices_with_depth
func (v *TreePath) GetIndices() []int {
	var depth C.gint
	var goindices []int
	var ginthelp C.gint
	indices := uintptr(unsafe.Pointer(C.gtk_tree_path_get_indices_with_depth(v.native(), &depth)))
	size := unsafe.Sizeof(ginthelp)
	for i := 0; i < int(depth); i++ {
		goind := int(*((*C.gint)(unsafe.Pointer(indices))))
		goindices = append(goindices, goind)
		indices += size
	}
	return goindices
}

// String is a wrapper around gtk_tree_path_to_string().
func (v *TreePath) String() string {
	c := C.gtk_tree_path_to_string(v.native())
	return goString(c)
}

// TreePathNewFromString is a wrapper around gtk_tree_path_new_from_string().
func TreePathNewFromString(path string) (*TreePath, error) {
	cstr := C.CString(path)
	defer C.free(unsafe.Pointer(cstr))
	c := C.gtk_tree_path_new_from_string((*C.gchar)(cstr))
	if c == nil {
		return nil, nilPtrErr
	}
	t := &TreePath{c}
	runtime.SetFinalizer(t, func(v *TreePath) { glib.FinalizerStrategy(v.free) })
	return t, nil
}

// Next() is a wrapper around gtk_tree_path_next()
func (v *TreePath) Next() {
	C.gtk_tree_path_next(v.native())
}

// Prev() is a wrapper around gtk_tree_path_prev()
func (v *TreePath) Prev() bool {
	return gobool(C.gtk_tree_path_prev(v.native()))
}

// Up() is a wrapper around gtk_tree_path_up()
func (v *TreePath) Up() bool {
	return gobool(C.gtk_tree_path_up(v.native()))
}

// TreePathNewFirst() is a wrapper around gtk_tree_path_new_first().
func TreePathNewFirst() (*TreePath, error) {
	c := C.gtk_tree_path_new_first()
	if c == nil {
		return nil, nilPtrErr
	}
	t := &TreePath{c}
	runtime.SetFinalizer(t, func(v *TreePath) { glib.FinalizerStrategy(v.free) })
	return t, nil
}

// AppendIndex() is a wrapper around gtk_tree_path_append_index().
func (v *TreePath) AppendIndex(index int) {
	C.gtk_tree_path_append_index(v.native(), C.gint(index))
}

// PrependIndex() is a wrapper around gtk_tree_path_prepend_index().
func (v *TreePath) PrependIndex(index int) {
	C.gtk_tree_path_prepend_index(v.native(), C.gint(index))
}

// GetDepth() is a wrapper around gtk_tree_path_get_depth().
func (v *TreePath) GetDepth() int {
	return int(C.gtk_tree_path_get_depth(v.native()))
}

// Copy() is a wrapper around gtk_tree_path_copy().
func (v *TreePath) Copy() (*TreePath, error) {
	c := C.gtk_tree_path_copy(v.native())
	if c == nil {
		return nil, nilPtrErr
	}
	t := &TreePath{c}
	runtime.SetFinalizer(t, func(v *TreePath) { glib.FinalizerStrategy(v.free) })
	return t, nil
}

// Compare() is a wrapper around gtk_tree_path_compare().
func (v *TreePath) Compare(b *TreePath) int {
	return int(C.gtk_tree_path_compare(v.native(), b.native()))
}

/*
 * GtkTreeSelection
 */

// TreeSelection is a representation of GTK's GtkTreeSelection.
type TreeSelection struct {
	*glib.Object
}

// native returns a pointer to the underlying GtkTreeSelection.
func (v *TreeSelection) native() *C.GtkTreeSelection {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkTreeSelection(p)
}

func marshalTreeSelection(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapTreeSelection(obj), nil
}

func wrapTreeSelection(obj *glib.Object) *TreeSelection {
	if obj == nil {
		return nil
	}

	return &TreeSelection{obj}
}

// GetSelected() is a wrapper around gtk_tree_selection_get_selected().
func (v *TreeSelection) GetSelected() (model ITreeModel, iter *TreeIter, ok bool) {
	var cmodel *C.GtkTreeModel
	var citer C.GtkTreeIter
	c := C.gtk_tree_selection_get_selected(v.native(),
		&cmodel, &citer)
	model = wrapTreeModel(glib.Take(unsafe.Pointer(cmodel)))
	iter = &TreeIter{citer}
	ok = gobool(c)
	return
}

// SelectPath is a wrapper around gtk_tree_selection_select_path().
func (v *TreeSelection) SelectPath(path *TreePath) {
	C.gtk_tree_selection_select_path(v.native(), path.native())
}

// UnselectPath is a wrapper around gtk_tree_selection_unselect_path().
func (v *TreeSelection) UnselectPath(path *TreePath) {
	C.gtk_tree_selection_unselect_path(v.native(), path.native())
}

// GetSelectedRows is a wrapper around gtk_tree_selection_get_selected_rows().
// All the elements of returned list are wrapped into (*gtk.TreePath) values.
//
// Please note that a runtime finalizer is only set on the head of the linked
// list, and must be kept live while accessing any item in the list, or the
// Go garbage collector will free the whole list.
func (v *TreeSelection) GetSelectedRows(model ITreeModel) *glib.List {
	var pcmodel **C.GtkTreeModel
	if model != nil {
		cmodel := model.toTreeModel()
		pcmodel = &cmodel
	}

	clist := C.gtk_tree_selection_get_selected_rows(v.native(), pcmodel)
	if clist == nil {
		return nil
	}

	glist := glib.WrapList(uintptr(unsafe.Pointer(clist)))
	glist.DataWrapper(func(ptr unsafe.Pointer) interface{} {
		return &TreePath{(*C.GtkTreePath)(ptr)}
	})
	runtime.SetFinalizer(glist, func(glist *glib.List) {
		glib.FinalizerStrategy(func() {
			glist.FreeFull(func(item interface{}) {
				path := item.(*TreePath)
				C.gtk_tree_path_free(path.GtkTreePath)
			})
		})
	})

	return glist
}

// CountSelectedRows() is a wrapper around gtk_tree_selection_count_selected_rows().
func (v *TreeSelection) CountSelectedRows() int {
	return int(C.gtk_tree_selection_count_selected_rows(v.native()))
}

// SelectIter is a wrapper around gtk_tree_selection_select_iter().
func (v *TreeSelection) SelectIter(iter *TreeIter) {
	C.gtk_tree_selection_select_iter(v.native(), iter.native())
}

// SetMode() is a wrapper around gtk_tree_selection_set_mode().
func (v *TreeSelection) SetMode(m SelectionMode) {
	C.gtk_tree_selection_set_mode(v.native(), C.GtkSelectionMode(m))
}

// GetMode() is a wrapper around gtk_tree_selection_get_mode().
func (v *TreeSelection) GetMode() SelectionMode {
	return SelectionMode(C.gtk_tree_selection_get_mode(v.native()))
}

// SelectAll() is a wrapper around gtk_tree_selection_select_all()
func (v *TreeSelection) SelectAll() {
	C.gtk_tree_selection_select_all(v.native())
}

// UnelectAll() is a wrapper around gtk_tree_selection_unselect_all()
func (v *TreeSelection) UnselectAll() {
	C.gtk_tree_selection_unselect_all(v.native())
}

// UnselectIter() is a wrapper around gtk_tree_selection_unselect_iter().
func (v *TreeSelection) UnselectIter(iter *TreeIter) {
	C.gtk_tree_selection_unselect_iter(v.native(), iter.native())
}

// IterIsSelected() is a wrapper around gtk_tree_selection_iter_is_selected().
func (v *TreeSelection) IterIsSelected(iter *TreeIter) bool {
	return gobool(C.gtk_tree_selection_iter_is_selected(v.native(), iter.native()))
}

// SelectRange() is a wrapper around gtk_tree_selection_select_range().
func (v *TreeSelection) SelectRange(start, end *TreePath) {
	C.gtk_tree_selection_select_range(v.native(), start.native(), end.native())
}

// UnselectRange() is a wrapper around gtk_tree_selection_unselect_range().
func (v *TreeSelection) UnselectRange(start, end *TreePath) {
	C.gtk_tree_selection_unselect_range(v.native(), start.native(), end.native())
}

// PathIsSelected() is a wrapper around gtk_tree_selection_path_is_selected().
func (v *TreeSelection) PathIsSelected(path *TreePath) bool {
	return gobool(C.gtk_tree_selection_path_is_selected(v.native(), path.native()))
}

// TreeSelectionForeachFunc defines the function prototype for the selected_foreach function (f arg) for
// (* TreeSelection).SelectedForEach
type TreeSelectionForeachFunc func(model *TreeModel, path *TreePath, iter *TreeIter)

// SelectedForEach() is a wrapper around gtk_tree_selection_selected_foreach()
func (v *TreeSelection) SelectedForEach(f TreeSelectionForeachFunc) {
	id := callback.Assign(f)
	defer callback.Delete(id)

	C._gtk_tree_selection_selected_foreach(v.native(), C.gpointer(id))
}

// TreeSelectionFunc defines the function prototype for the gtk_tree_selection_set_select_function
// function (f arg) for (* TreeSelection).SetSelectFunction
type TreeSelectionFunc func(selection *TreeSelection, model *TreeModel, path *TreePath, selected bool) bool

// SetSelectFunction() is a wrapper around gtk_tree_selection_set_select_function()
func (v *TreeSelection) SetSelectFunction(f TreeSelectionFunc) {
	C._gtk_tree_selection_set_select_function(v.native(), C.gpointer(callback.Assign(f)))
}

/*
 * GtkTreeRowReference
 */

// TreeRowReference is a representation of GTK's GtkTreeRowReference.
type TreeRowReference struct {
	GtkTreeRowReference *C.GtkTreeRowReference
}

func (v *TreeRowReference) native() *C.GtkTreeRowReference {
	if v == nil {
		return nil
	}
	return v.GtkTreeRowReference
}

func (v *TreeRowReference) free() {
	C.gtk_tree_row_reference_free(v.native())
}

// TreeRowReferenceNew is a wrapper around gtk_tree_row_reference_new().
func TreeRowReferenceNew(model *TreeModel, path *TreePath) (*TreeRowReference, error) {
	c := C.gtk_tree_row_reference_new(model.native(), path.native())
	if c == nil {
		return nil, nilPtrErr
	}
	r := &TreeRowReference{c}
	runtime.SetFinalizer(r, func(v *TreeRowReference) { glib.FinalizerStrategy(v.free) })
	return r, nil
}

// GetPath is a wrapper around gtk_tree_row_reference_get_path.
func (v *TreeRowReference) GetPath() *TreePath {
	c := C.gtk_tree_row_reference_get_path(v.native())
	if c == nil {
		return nil
	}
	t := &TreePath{c}
	runtime.SetFinalizer(t, func(v *TreePath) { glib.FinalizerStrategy(v.free) })
	return t
}

// GetModel is a wrapper around gtk_tree_row_reference_get_path.
func (v *TreeRowReference) GetModel() (ITreeModel, error) {
	c := C.gtk_tree_row_reference_get_model(v.native())
	if c == nil {
		return nil, nilPtrErr
	}
	return castTreeModel(c)
}

// Valid is a wrapper around gtk_tree_row_reference_valid.
func (v *TreeRowReference) Valid() bool {
	c := C.gtk_tree_row_reference_valid(v.native())
	return gobool(c)
}

/*
 * GtkTreeSortable
 */

// TreeSortable is a representation of GTK's GtkTreeSortable
type TreeSortable struct {
	*glib.Object
}

// ITreeSortable is an interface type implemented by all structs
// embedding a TreeSortable.  It is meant to be used as an argument type
// for wrapper functions that wrap around a C GTK function taking a
// GtkTreeSortable.
type ITreeSortable interface {
	toTreeSortable() *C.GtkTreeSortable
}

// native returns a pointer to the underlying GtkTreeSortable
func (v *TreeSortable) native() *C.GtkTreeSortable {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkTreeSortable(p)
}

func (v *TreeSortable) toTreeSortable() *C.GtkTreeSortable {
	if v == nil {
		return nil
	}
	return v.native()
}

func marshalTreeSortable(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapTreeSortable(obj), nil
}

func wrapTreeSortable(obj *glib.Object) *TreeSortable {
	if obj == nil {
		return nil
	}

	return &TreeSortable{obj}
}

// TreeIterCompareFunc is a representation of GtkTreeIterCompareFunc.
// It defines the function prototype for the sort function (f arg) for (* TreeSortable).SetSortFunc
type TreeIterCompareFunc func(model *TreeModel, a, b *TreeIter) int

// GetSortColumnId() is a wrapper around gtk_tree_sortable_get_sort_column_id().
func (v *TreeSortable) GetSortColumnId() (int, SortType, bool) {
	var column C.gint
	var order C.GtkSortType
	ok := gobool(C.gtk_tree_sortable_get_sort_column_id(v.native(), &column, &order))
	return int(column), SortType(order), ok
}

// SetSortColumnId() is a wrapper around gtk_tree_sortable_set_sort_column_id().
func (v *TreeSortable) SetSortColumnId(column int, order SortType) {
	C.gtk_tree_sortable_set_sort_column_id(v.native(), C.gint(column), C.GtkSortType(order))
}

// SetSortFunc() is a wrapper around gtk_tree_sortable_set_sort_func().
func (v *TreeSortable) SetSortFunc(sortColumn int, f TreeIterCompareFunc) {
	C._gtk_tree_sortable_set_sort_func(v.native(), C.gint(sortColumn), C.gpointer(callback.Assign(f)))
}

// SetDefaultSortFunc() is a wrapper around gtk_tree_sortable_set_default_sort_func().
func (v *TreeSortable) SetDefaultSortFunc(f TreeIterCompareFunc) {
	C._gtk_tree_sortable_set_default_sort_func(v.native(), C.gpointer(callback.Assign(f)))
}

func (v *TreeSortable) HasDefaultSortFunc() bool {
	return gobool(C.gtk_tree_sortable_has_default_sort_func(v.native()))
}

/*
 * GtkTreeModelSort
 */

// TreeModelSort is a representation of GTK's GtkTreeModelSort
type TreeModelSort struct {
	*glib.Object

	// Interfaces
	TreeModel
	TreeSortable
}

// native returns a pointer to the underlying GtkTreeModelSort
func (v *TreeModelSort) native() *C.GtkTreeModelSort {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkTreeModelSort(p)
}

func marshalTreeModelSort(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapTreeModelSort(obj), nil
}

func wrapTreeModelSort(obj *glib.Object) *TreeModelSort {
	if obj == nil {
		return nil
	}

	tm := wrapTreeModel(obj)
	ts := wrapTreeSortable(obj)
	return &TreeModelSort{obj, *tm, *ts}
}

func (v *TreeModelSort) toTreeModel() *C.GtkTreeModel {
	if v == nil {
		return nil
	}
	return C.toGtkTreeModel(unsafe.Pointer(v.GObject))
}

func (v *TreeModelSort) toTreeSortable() *C.GtkTreeSortable {
	if v == nil {
		return nil
	}
	return C.toGtkTreeSortable(unsafe.Pointer(v.GObject))
}

// TreeModelSortNew is a wrapper around gtk_tree_model_sort_new_with_model():
func TreeModelSortNew(model ITreeModel) (*TreeModelSort, error) {
	var mptr *C.GtkTreeModel
	if model != nil {
		mptr = model.toTreeModel()
	}
	c := C.gtk_tree_model_sort_new_with_model(mptr)
	if c == nil {
		return nil, nilPtrErr
	}

	tms := wrapTreeModelSort(glib.Take(unsafe.Pointer(c)))
	return tms, nil
}

// GetModel is a wrapper around gtk_tree_model_sort_get_model()
func (v *TreeModelSort) GetModel() (ITreeModel, error) {
	c := C.gtk_tree_model_sort_get_model(v.native())
	if c == nil {
		return nil, nilPtrErr
	}
	return castTreeModel(c)
}

// ConvertChildPathToPath is a wrapper around gtk_tree_model_sort_convert_child_path_to_path().
func (v *TreeModelSort) ConvertChildPathToPath(childPath *TreePath) *TreePath {
	path := C.gtk_tree_model_sort_convert_child_path_to_path(v.native(), childPath.native())
	if path == nil {
		return nil
	}
	p := &TreePath{path}
	runtime.SetFinalizer(p, func(v *TreePath) { glib.FinalizerStrategy(v.free) })
	return p
}

// ConvertChildIterToIter is a wrapper around gtk_tree_model_sort_convert_child_iter_to_iter().
func (v *TreeModelSort) ConvertChildIterToIter(childIter *TreeIter) (*TreeIter, bool) {
	var iter C.GtkTreeIter
	ok := gobool(C.gtk_tree_model_sort_convert_child_iter_to_iter(v.native(), &iter, childIter.native()))
	t := &TreeIter{iter}
	return t, ok
}

// ConvertPathToChildPath is a wrapper around gtk_tree_model_sort_convert_path_to_child_path().
func (v *TreeModelSort) ConvertPathToChildPath(sortPath *TreePath) *TreePath {
	path := C.gtk_tree_model_sort_convert_path_to_child_path(v.native(), sortPath.native())
	if path == nil {
		return nil
	}
	p := &TreePath{path}
	runtime.SetFinalizer(p, func(v *TreePath) { glib.FinalizerStrategy(v.free) })
	return p
}

// ConvertIterToChildIter is a wrapper around gtk_tree_model_sort_convert_iter_to_child_iter().
func (v *TreeModelSort) ConvertIterToChildIter(sortIter *TreeIter) *TreeIter {
	var iter C.GtkTreeIter
	C.gtk_tree_model_sort_convert_iter_to_child_iter(v.native(), &iter, sortIter.native())
	t := &TreeIter{iter}
	return t
}

// ResetDefaultSortFunc is a wrapper around gtk_tree_model_sort_reset_default_sort_func().
func (v *TreeModelSort) ResetDefaultSortFunc() {
	C.gtk_tree_model_sort_reset_default_sort_func(v.native())
}

// ClearCache is a wrapper around gtk_tree_model_sort_clear_cache().
func (v *TreeModelSort) ClearCache() {
	C.gtk_tree_model_sort_clear_cache(v.native())
}

// IterIsValid is a wrapper around gtk_tree_model_sort_iter_is_valid().
func (v *TreeModelSort) IterIsValid(iter *TreeIter) bool {
	return gobool(C.gtk_tree_model_sort_iter_is_valid(v.native(), iter.native()))
}

/*
 * GtkTreeStore
 */

// TreeStore is a representation of GTK's GtkTreeStore.
type TreeStore struct {
	*glib.Object

	// Interfaces
	TreeModel
	TreeSortable
}

// native returns a pointer to the underlying GtkTreeStore.
func (v *TreeStore) native() *C.GtkTreeStore {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkTreeStore(p)
}

func marshalTreeStore(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapTreeStore(obj), nil
}

func wrapTreeStore(obj *glib.Object) *TreeStore {
	if obj == nil {
		return nil
	}

	tm := wrapTreeModel(obj)
	ts := wrapTreeSortable(obj)
	return &TreeStore{obj, *tm, *ts}
}

func (v *TreeStore) toTreeModel() *C.GtkTreeModel {
	if v == nil {
		return nil
	}
	return C.toGtkTreeModel(unsafe.Pointer(v.GObject))
}

func (v *TreeStore) toTreeSortable() *C.GtkTreeSortable {
	if v == nil {
		return nil
	}
	return C.toGtkTreeSortable(unsafe.Pointer(v.GObject))
}

// TreeStoreNew is a wrapper around gtk_tree_store_newv().
func TreeStoreNew(types ...glib.Type) (*TreeStore, error) {
	gtypes := C.alloc_types(C.int(len(types)))
	for n, val := range types {
		C.set_type(gtypes, C.int(n), C.GType(val))
	}
	defer C.g_free(C.gpointer(gtypes))
	c := C.gtk_tree_store_newv(C.gint(len(types)), gtypes)
	if c == nil {
		return nil, nilPtrErr
	}

	ts := wrapTreeStore(glib.Take(unsafe.Pointer(c)))
	return ts, nil
}

// Append is a wrapper around gtk_tree_store_append().
func (v *TreeStore) Append(parent *TreeIter) *TreeIter {
	var ti C.GtkTreeIter
	var cParent *C.GtkTreeIter
	if parent != nil {
		cParent = parent.native()
	}
	C.gtk_tree_store_append(v.native(), &ti, cParent)
	iter := &TreeIter{ti}
	return iter
}

// Prepend is a wrapper around gtk_tree_store_prepend().
func (v *TreeStore) Prepend(parent *TreeIter) *TreeIter {
	var ti C.GtkTreeIter
	var cParent *C.GtkTreeIter
	if parent != nil {
		cParent = parent.native()
	}
	C.gtk_tree_store_prepend(v.native(), &ti, cParent)
	iter := &TreeIter{ti}
	return iter
}

// Insert is a wrapper around gtk_tree_store_insert
func (v *TreeStore) Insert(parent *TreeIter, position int) *TreeIter {
	var ti C.GtkTreeIter
	var cParent *C.GtkTreeIter
	if parent != nil {
		cParent = parent.native()
	}
	C.gtk_tree_store_insert(v.native(), &ti, cParent, C.gint(position))
	iter := &TreeIter{ti}
	return iter
}

// SetValue is a wrapper around gtk_tree_store_set_value()
func (v *TreeStore) SetValue(iter *TreeIter, column int, value interface{}) error {
	switch value.(type) {
	case *gdk.Pixbuf:
		pix := value.(*gdk.Pixbuf)
		C._gtk_tree_store_set(v.native(), iter.native(), C.gint(column), unsafe.Pointer(pix.Native()))

	default:
		gv, err := glib.GValue(value)
		if err != nil {
			return err
		}
		C.gtk_tree_store_set_value(v.native(), iter.native(),
			C.gint(column),
			(*C.GValue)(C.gpointer(gv.Native())))
	}
	return nil
}

// Remove is a wrapper around gtk_tree_store_remove().
func (v *TreeStore) Remove(iter *TreeIter) bool {
	var ti *C.GtkTreeIter
	if iter != nil {
		ti = iter.native()
	}
	return 0 != C.gtk_tree_store_remove(v.native(), ti)
}

// Clear is a wrapper around gtk_tree_store_clear().
func (v *TreeStore) Clear() {
	C.gtk_tree_store_clear(v.native())
}

// InsertBefore() is a wrapper around gtk_tree_store_insert_before().
func (v *TreeStore) InsertBefore(parent, sibling *TreeIter) *TreeIter {
	var ti C.GtkTreeIter
	C.gtk_tree_store_insert_before(v.native(), &ti, parent.native(), sibling.native())
	iter := &TreeIter{ti}
	return iter
}

// InsertAfter() is a wrapper around gtk_tree_store_insert_after().
func (v *TreeStore) InsertAfter(parent, sibling *TreeIter) *TreeIter {
	var ti C.GtkTreeIter
	C.gtk_tree_store_insert_after(v.native(), &ti, parent.native(), sibling.native())
	iter := &TreeIter{ti}
	return iter
}

// InsertWithValues() is a wrapper around gtk_tree_store_insert_with_valuesv().
func (v *TreeStore) InsertWithValues(iter, parent *TreeIter, position int, inColumns []int, inValues []interface{}) error {
	length := len(inColumns)
	if len(inValues) < length {
		length = len(inValues)
	}

	cColumns := make([]C.gint, 0, length)
	cValues := make([]C.GValue, 0, length)

	for i := 0; i < length; i++ {

		value := inValues[i]
		var gvalue *C.GValue

		switch value.(type) {
		case *gdk.Pixbuf:
			pix := value.(*gdk.Pixbuf)

			if pix == nil {
				continue
			}

			gvalue = (*C.GValue)(unsafe.Pointer(pix.Native()))

		default:
			gv, err := glib.GValue(value)
			if err != nil {
				return err
			}
			gvalue = (*C.GValue)(C.gpointer(gv.Native()))
		}

		cColumns = append(cColumns, C.gint(inColumns[i]))
		cValues = append(cValues, *gvalue)
	}

	var cColumnsPointer *C.gint
	if len(cColumns) > 0 {
		cColumnsPointer = &cColumns[0]
	}
	var cValuesPointer *C.GValue
	if len(cValues) > 0 {
		cValuesPointer = &cValues[0]
	}

	C.gtk_tree_store_insert_with_valuesv(v.native(), iter.native(), parent.native(), C.gint(position), cColumnsPointer, cValuesPointer, C.gint(len(cColumns)))

	return nil
}

// MoveBefore is a wrapper around gtk_tree_store_move_before().
func (v *TreeStore) MoveBefore(iter, position *TreeIter) {
	C.gtk_tree_store_move_before(v.native(), iter.native(),
		position.native())
}

// MoveAfter is a wrapper around gtk_tree_store_move_after().
func (v *TreeStore) MoveAfter(iter, position *TreeIter) {
	C.gtk_tree_store_move_after(v.native(), iter.native(),
		position.native())
}

// Swap is a wrapper around gtk_tree_store_swap().
func (v *TreeStore) Swap(a, b *TreeIter) {
	C.gtk_tree_store_swap(v.native(), a.native(), b.native())
}

// SetColumnTypes is a wrapper around gtk_tree_store_set_column_types().
// The size of glib.Type must match the number of columns
func (v *TreeStore) SetColumnTypes(types ...glib.Type) {
	gtypes := C.alloc_types(C.int(len(types)))
	for n, val := range types {
		C.set_type(gtypes, C.int(n), C.GType(val))
	}
	defer C.g_free(C.gpointer(gtypes))
	C.gtk_tree_store_set_column_types(v.native(), C.gint(len(types)), gtypes)
}

/*
 * GtkViewport
 */

// Viewport is a representation of GTK's GtkViewport GInterface.
type Viewport struct {
	Bin

	// Interfaces
	Scrollable
}

// IViewport is an interface type implemented by all structs
// embedding a Viewport.  It is meant to be used as an argument type
// for wrapper functions that wrap around a C GTK function taking a
// GtkViewport.
type IViewport interface {
	toViewport() *C.GtkViewport
}

// native() returns a pointer to the underlying GObject as a GtkViewport.
func (v *Viewport) native() *C.GtkViewport {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkViewport(p)
}

func wrapViewport(obj *glib.Object) *Viewport {
	if obj == nil {
		return nil
	}

	b := wrapBin(obj)
	s := wrapScrollable(obj)
	return &Viewport{
		Bin:        *b,
		Scrollable: *s,
	}
}

func marshalViewport(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapViewport(obj), nil
}

func (v *Viewport) toViewport() *C.GtkViewport {
	if v == nil {
		return nil
	}
	return v.native()
}

// ViewportNew() is a wrapper around gtk_viewport_new().
func ViewportNew(hadjustment, vadjustment *Adjustment) (*Viewport, error) {
	c := C.gtk_viewport_new(hadjustment.native(), vadjustment.native())
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapViewport(glib.Take(unsafe.Pointer(c))), nil
}

// SetShadowType is a wrapper around gtk_viewport_set_shadow_type().
func (v *Viewport) SetShadowType(shadowType ShadowType) {
	C.gtk_viewport_set_shadow_type(v.native(), C.GtkShadowType(shadowType))
}

// GetShadowType is a wrapper around gtk_viewport_get_shadow_type().
func (v *Viewport) GetShadowType() ShadowType {
	c := C.gtk_viewport_get_shadow_type(v.native())
	return ShadowType(c)
}

// GetBinWindow is a wrapper around gtk_viewport_get_bin_window().
func (v *Viewport) GetBinWindow() *gdk.Window {
	c := C.gtk_viewport_get_bin_window(v.native())
	if c == nil {
		return nil
	}
	return &gdk.Window{glib.Take(unsafe.Pointer(c))}
}

// GetViewWindow is a wrapper around gtk_viewport_get_view_window().
func (v *Viewport) GetViewWindow() *gdk.Window {
	c := C.gtk_viewport_get_view_window(v.native())
	if c == nil {
		return nil
	}
	return &gdk.Window{glib.Take(unsafe.Pointer(c))}
}

/*
 * GtkVolumeButton
 */

// VolumeButton is a representation of GTK's GtkVolumeButton.
type VolumeButton struct {
	ScaleButton
}

// native() returns a pointer to the underlying GtkVolumeButton.
func (v *VolumeButton) native() *C.GtkVolumeButton {
	if v == nil || v.GObject == nil {
		return nil
	}
	p := unsafe.Pointer(v.GObject)
	return C.toGtkVolumeButton(p)
}

func marshalVolumeButton(p uintptr) (interface{}, error) {
	c := C.g_value_get_object((*C.GValue)(unsafe.Pointer(p)))
	obj := glib.Take(unsafe.Pointer(c))
	return wrapVolumeButton(obj), nil
}

func wrapVolumeButton(obj *glib.Object) *VolumeButton {
	if obj == nil {
		return nil
	}

	actionable := wrapActionable(obj)
	return &VolumeButton{ScaleButton{Button{Bin{Container{Widget{glib.InitiallyUnowned{obj}}}}, actionable}}}
}

// VolumeButtonNew is a wrapper around gtk_volume_button_new().
func VolumeButtonNew() (*VolumeButton, error) {
	c := C.gtk_volume_button_new()
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapVolumeButton(glib.Take(unsafe.Pointer(c))), nil
}

type WrapFn interface{}

var WrapMap = map[string]WrapFn{
	"GtkAccelGroup":           wrapAccelGroup,
	"GtkAccelMao":             wrapAccelMap,
	"GtkAdjustment":           wrapAdjustment,
	"GtkApplicationWindow":    wrapApplicationWindow,
	"GtkAssistant":            wrapAssistant,
	"GtkBin":                  wrapBin,
	"GtkBox":                  wrapBox,
	"GtkButton":               wrapButton,
	"GtkButtonBox":            wrapButtonBox,
	"GtkCalendar":             wrapCalendar,
	"GtkCellLayout":           wrapCellLayout,
	"GtkCellEditable":         wrapCellEditable,
	"GtkCellRenderer":         wrapCellRenderer,
	"GtkCellRendererSpinner":  wrapCellRendererSpinner,
	"GtkCellRendererPixbuf":   wrapCellRendererPixbuf,
	"GtkCellRendererText":     wrapCellRendererText,
	"GtkCellRendererProgress": wrapCellRendererProgress,
	"GtkCellRendererToggle":   wrapCellRendererToggle,
	"GtkCellRendererCombo":    wrapCellRendererCombo,
	"GtkCellRendererAccel":    wrapCellRendererAccel,
	"GtkCellRendererSpin":     wrapCellRendererSpin,
	"GtkCheckButton":          wrapCheckButton,
	"GtkCheckMenuItem":        wrapCheckMenuItem,
	"GtkClipboard":            wrapClipboard,
	"GtkColorButton":          wrapColorButton,
	"GtkContainer":            wrapContainer,
	"GtkDialog":               wrapDialog,
	"GtkDrawingArea":          wrapDrawingArea,
	"GtkEditable":             wrapEditable,
	"GtkEntry":                wrapEntry,
	"GtkEntryBuffer":          wrapEntryBuffer,
	"GtkEntryCompletion":      wrapEntryCompletion,
	"GtkEventBox":             wrapEventBox,
	"GtkExpander":             wrapExpander,
	"GtkFrame":                wrapFrame,
	"GtkFileChooser":          wrapFileChooser,
	"GtkFileChooserButton":    wrapFileChooserButton,
	"GtkFileChooserDialog":    wrapFileChooserDialog,
	"GtkFileChooserWidget":    wrapFileChooserWidget,
	"GtkGrid":                 wrapGrid,
	"GtkIconView":             wrapIconView,
	"GtkImage":                wrapImage,
	"GtkLabel":                wrapLabel,
	"GtkLayout":               wrapLayout,
	"GtkLinkButton":           wrapLinkButton,
	"GtkListStore":            wrapListStore,
	"GtkMenu":                 wrapMenu,
	"GtkMenuBar":              wrapMenuBar,
	"GtkMenuButton":           wrapMenuButton,
	"GtkMenuItem":             wrapMenuItem,
	"GtkMenuShell":            wrapMenuShell,
	"GtkMessageDialog":        wrapMessageDialog,
	"GtkNotebook":             wrapNotebook,
	"GtkOffscreenWindow":      wrapOffscreenWindow,
	"GtkOrientable":           wrapOrientable,
	"GtkOverlay":              wrapOverlay,
	"GtkPaned":                wrapPaned,
	"GtkProgressBar":          wrapProgressBar,
	"GtkRadioButton":          wrapRadioButton,
	"GtkRadioMenuItem":        wrapRadioMenuItem,
	"GtkRange":                wrapRange,
	"GtkRecentChooser":        wrapRecentChooser,
	"GtkRecentChooserMenu":    wrapRecentChooserMenu,
	"GtkRecentFilter":         wrapRecentFilter,
	"GtkRecentManager":        wrapRecentManager,
	"GtkScaleButton":          wrapScaleButton,
	"GtkScale":                wrapScale,
	"GtkScrollable":           wrapScrollable,
	"GtkScrollbar":            wrapScrollbar,
	"GtkScrolledWindow":       wrapScrolledWindow,
	"GtkSearchEntry":          wrapSearchEntry,
	"GtkSeparator":            wrapSeparator,
	"GtkSeparatorMenuItem":    wrapSeparatorMenuItem,
	"GtkSeparatorToolItem":    wrapSeparatorToolItem,
	"GtkSpinButton":           wrapSpinButton,
	"GtkSpinner":              wrapSpinner,
	"GtkStatusbar":            wrapStatusbar,
	"GtkSwitch":               wrapSwitch,
	"GtkTextBuffer":           wrapTextBuffer,
	"GtkTextChildAnchor":      wrapTextChildAnchor,
	"GtkTextTag":              wrapTextTag,
	"GtkTextTagTable":         wrapTextTagTable,
	"GtkTextView":             wrapTextView,
	"GtkToggleButton":         wrapToggleButton,
	"GtkToolbar":              wrapToolbar,
	"GtkToolButton":           wrapToolButton,
	"GtkToggleToolButton":     wrapToggleToolButton,
	"GtkToolItem":             wrapToolItem,
	"GtkTreeModel":            wrapTreeModel,
	"GtkTreeModelFilter":      wrapTreeModelFilter,
	"GtkTreeModelSort":        wrapTreeModelSort,
	"GtkTreeSelection":        wrapTreeSelection,
	"GtkTreeStore":            wrapTreeStore,
	"GtkTreeView":             wrapTreeView,
	"GtkTreeViewColumn":       wrapTreeViewColumn,
	"GtkViewport":             wrapViewport,
	"GtkVolumeButton":         wrapVolumeButton,
	"GtkWidget":               wrapWidget,
	"GtkWindow":               wrapWindow,
}

// castInternal casts the given object to the appropriate Go struct, but returns it as interface for later type assertions.
// The className is the results of C.object_get_class_name(c) called on the native object.
// The obj is the result of glib.Take(unsafe.Pointer(c)), used as a parameter for the wrapper functions.
func castInternal(className string, obj *glib.Object) (interface{}, error) {
	fn, ok := WrapMap[className]
	if !ok {
		fn, ok = glib.WrapMap[className]
		if !ok {
			return nil, errors.New("unrecognized class name '" + className + "'")
		}
	}

	// Check that the wrapper function is actually a function
	rf := reflect.ValueOf(fn)
	if rf.Type().Kind() != reflect.Func {
		return nil, errors.New("wraper is not a function")
	}

	// Call the wraper function with the *glib.Object as first parameter
	// e.g. "wrapWindow(obj)"
	v := reflect.ValueOf(obj)
	rv := rf.Call([]reflect.Value{v})

	// At most/max 1 return value
	if len(rv) != 1 {
		return nil, errors.New("wrapper did not return")
	}

	// Needs to be a pointer of some sort
	if k := rv[0].Kind(); k != reflect.Ptr {
		return nil, fmt.Errorf("wrong return type %s", k)
	}

	// Only get an interface value, type check will be done in more specific functions
	return rv[0].Interface(), nil
}

// cast takes a native GObject and casts it to the appropriate Go struct.
// TODO change all wrapFns to return an IObject
// ^- not sure about this TODO. This may make some usages of the wrapper functions quite verbose, no?
func cast(c *C.GObject) (glib.IObject, error) {
	ptr := unsafe.Pointer(c)
	var (
		className = goString(C.object_get_class_name(C.toGObject(ptr)))
		obj       = glib.Take(ptr)
	)

	intf, err := castInternal(className, obj)
	if err != nil {
		return nil, err
	}

	ret, ok := intf.(glib.IObject)
	if !ok {
		return nil, errors.New("did not return an IObject")
	}

	return ret, nil
}

// castWidget takes a native GtkWidget and casts it to the appropriate Go struct.
func castWidget(c *C.GtkWidget) (IWidget, error) {
	ptr := unsafe.Pointer(c)
	var (
		className = goString(C.object_get_class_name(C.toGObject(ptr)))
		obj       = glib.Take(ptr)
	)

	intf, err := castInternal(className, obj)
	if err != nil {
		return nil, err
	}

	ret, ok := intf.(IWidget)
	if !ok {
		return nil, fmt.Errorf("expected value of type IWidget, got %T", intf)
	}

	return ret, nil
}

// castCellRenderer takes a native GtkCellRenderer and casts it to the appropriate Go struct.
func castCellRenderer(c *C.GtkCellRenderer) (ICellRenderer, error) {
	ptr := unsafe.Pointer(c)
	var (
		className = goString(C.object_get_class_name(C.toGObject(ptr)))
		obj       = glib.Take(ptr)
	)

	intf, err := castInternal(className, obj)
	if err != nil {
		return nil, err
	}

	ret, ok := intf.(ICellRenderer)
	if !ok {
		return nil, fmt.Errorf("expected value of type ICellRenderer, got %T", intf)
	}

	return ret, nil
}

// castTreeModel takes a native GtkCellTreeModel and casts it to the appropriate Go struct.
func castTreeModel(c *C.GtkTreeModel) (ITreeModel, error) {
	ptr := unsafe.Pointer(c)
	var (
		className = goString(C.object_get_class_name(C.toGObject(ptr)))
		obj       = glib.Take(ptr)
	)

	intf, err := castInternal(className, obj)
	if err != nil {
		return nil, err
	}

	ret, ok := intf.(ITreeModel)
	if !ok {
		return nil, fmt.Errorf("expected value of type ITreeModel, got %T", intf)
	}

	return ret, nil
}

// castCellEditable takes a native GtkCellEditable and casts it to the appropriate Go struct.
func castCellEditable(c *C.GtkCellEditable) (ICellEditable, error) {
	ptr := unsafe.Pointer(c)
	var (
		className = goString(C.object_get_class_name(C.toGObject(ptr)))
		obj       = glib.Take(ptr)
	)

	intf, err := castInternal(className, obj)
	if err != nil {
		return nil, err
	}

	ret, ok := intf.(ICellEditable)
	if !ok {
		return nil, fmt.Errorf("expected value of type ICellEditable, got %T", intf)
	}

	return ret, nil
}