Add space key scrolling for convert settings

internal/ui/components.go

@@ -551,6 +551,39 @@ func (f *FastVScroll) Scrolled(ev *fyne.ScrollEvent) {
 	f.scroll.Scrolled(fastEvent)
 }
 
+// ScrollBy scrolls the content by a delta in pixels (positive = down).
+func (f *FastVScroll) ScrollBy(delta float32) {
+	if f == nil || f.scroll == nil || f.scroll.Content == nil {
+		return
+	}
+	max := f.scroll.Content.MinSize().Height - f.scroll.Size().Height
+	if max < 0 {
+		max = 0
+	}
+	newY := f.scroll.Offset.Y + delta
+	if newY < 0 {
+		newY = 0
+	} else if newY > max {
+		newY = max
+	}
+	f.scroll.ScrollToOffset(fyne.NewPos(f.scroll.Offset.X, newY))
+}
+
+// PageStep returns a reasonable scroll step based on the current viewport.
+func (f *FastVScroll) PageStep() float32 {
+	if f == nil || f.scroll == nil {
+		return 0
+	}
+	height := f.scroll.Size().Height
+	if height <= 0 {
+		height = f.scroll.MinSize().Height
+	}
+	if height <= 0 {
+		height = 240
+	}
+	return height * 0.85
+}
+
 type fastScrollRenderer struct {
 	scroll *container.Scroll
 }

main.go

@@ -985,6 +985,7 @@ type appState struct {
 	inspectInterlaceAnalyzing bool
 	autoCompare               bool // Auto-load Compare module after conversion
 	convertCommandPreviewShow bool // Show FFmpeg command preview in Convert module
+	convertScrollShortcuts    bool
 
 	// Merge state
 	mergeClips               []mergeClip
@@ -6999,6 +7000,11 @@ func buildConvertView(state *appState, src *videoSource) fyne.CanvasObject {
 	var updateDVDOptions func()
 	var buildCommandPreview func()
 
+	// Declare output widgets early to fix variable order issues
+	var outputExtLabel *widget.Label
+	var outputExtBG *canvas.Rectangle
+	var updateOutputHint func()
+
 	var formatLabels []string
 	for _, opt := range formatOptions {
 		formatLabels = append(formatLabels, opt.Label)
@@ -9097,6 +9103,50 @@ func buildConvertView(state *appState, src *videoSource) fyne.CanvasObject {
 		}
 	}
 
+	if !state.convertScrollShortcuts && state.window != nil {
+		state.convertScrollShortcuts = true
+		isTextEntryFocused := func() bool {
+			c := state.window.Canvas()
+			if c == nil {
+				return false
+			}
+			switch c.Focused().(type) {
+			case *widget.Entry, *widget.MultiLineEntry:
+				return true
+			default:
+				return false
+			}
+		}
+
+		scrollActive := func() *ui.FastVScroll {
+			if tabs.Selected() != nil && tabs.Selected().Text == "Advanced" {
+				return advancedScrollBox
+			}
+			return simpleScrollBox
+		}
+
+		state.window.Canvas().AddShortcut(&desktop.CustomShortcut{KeyName: fyne.KeySpace}, func(_ fyne.Shortcut) {
+			if state.active != "convert" || isTextEntryFocused() {
+				return
+			}
+			scroll := scrollActive()
+			if scroll == nil {
+				return
+			}
+			scroll.ScrollBy(scroll.PageStep())
+		})
+		state.window.Canvas().AddShortcut(&desktop.CustomShortcut{KeyName: fyne.KeySpace, Modifier: fyne.KeyModifierControl}, func(_ fyne.Shortcut) {
+			if state.active != "convert" || isTextEntryFocused() {
+				return
+			}
+			scroll := scrollActive()
+			if scroll == nil {
+				return
+			}
+			scroll.ScrollBy(-scroll.PageStep())
+		})
+	}
+
 	optionsRect := canvas.NewRectangle(utils.MustHex("#13182B"))
 	optionsRect.CornerRadius = 8
 	optionsRect.StrokeColor = gridColor