v0.1.1 — structural renderer with safe area and 40x24 grid baseline

config/config.json

@@ -0,0 +1,16 @@
+{
+  "Mode": "Broadcaster",
+  "ScreenWidth": 800,
+  "ScreenHeight": 600,
+  "Font": {
+    "Name": "Modeseven",
+    "Path": "assets/fonts/Modeseven.ttf",
+    "Size": 18
+  },
+  "ShowGrid": false,
+  "Colours": {
+    "Header": "blue",
+    "Footer": "red",
+    "Background": "black"
+  }
+}

main.py

@@ -1,22 +1,23 @@
-"""
-Telefact — minimal runner
-- Opens a 4:3 800×600 window
-- Renders header (blue band) and footer (red band)
-- No formatter yet; that’s next.
-"""
-
 import tkinter as tk
+from src.config_manager import ConfigManager
 from src.telefact_renderer import TelefactRenderer
 from src.core.telefact_frame import TelefactFrame
 
 def main():
+    config = ConfigManager().config
+
     root = tk.Tk()
-    root.title("Telefact — Broadcaster Prototype")
+    root.title(f"Telefact — Broadcaster ({config['Mode']})")
+
+    renderer = TelefactRenderer(
+        root,
+        width=config["ScreenWidth"],
+        height=config["ScreenHeight"],
+        show_grid=config.get("ShowGrid", False),
+        font_path=config["Font"]["Path"]
+    )
 
-    renderer = TelefactRenderer(root, width=800, height=600, show_grid=False)
     frame = TelefactFrame()
-
-    # put a couple test glyphs so you can confirm alignment quickly
     for i, ch in enumerate("TELEFACT"):
         frame.set_cell(2 + i, 2, ch, "yellow")
     for i, ch in enumerate("BROADCASTER BASE"):

src/config_manager.py

@@ -0,0 +1,22 @@
+import json
+import os
+
+class ConfigManager:
+    def __init__(self, config_path: str = "config/config.json"):
+        self.config_path = config_path
+        self.config = self._load()
+
+    def _load(self):
+        if not os.path.exists(self.config_path):
+            raise FileNotFoundError(f"Config file not found: {self.config_path}")
+        with open(self.config_path, "r", encoding="utf-8") as f:
+            return json.load(f)
+
+    def get(self, key, default=None):
+        """Return a top-level config key, e.g. 'Font' or 'Mode'."""
+        return self.config.get(key, default)
+
+    def save(self):
+        """Write any changes back to disk."""
+        with open(self.config_path, "w", encoding="utf-8") as f:
+            json.dump(self.config, f, indent=2)

src/telefact_renderer.py

@@ -1,10 +1,13 @@
 """
 Telefact Renderer (Tkinter)
-- Renders a TelefactFrame to a Canvas.
+- Renders a 40×24 Telefact grid within a safe-area margin.
+- No header/footer bands; for layout calibration only.
 - Pure Python (stdlib only).
 """
 
+import os
 import tkinter as tk
+from tkinter import font as tkfont
 from typing import Dict
 from src.core.telefact_frame import TelefactFrame
 
@@ -19,74 +22,116 @@ PALETTE: Dict[str, str] = {
     "white":  "#FFFFFF",
 }
 
+
 class TelefactRenderer:
-    def __init__(self, root: tk.Tk, width: int = 800, height: int = 600, show_grid: bool = False):
+    def __init__(
+        self,
+        root: tk.Tk,
+        width: int = 880,
+        height: int = 660,
+        show_grid: bool = True,
+        colors: dict | None = None,
+        font_path: str | None = None,
+        font_size: int = 18,
+    ):
         self.root = root
         self.width = width
         self.height = height
         self.show_grid = show_grid
 
-        # 40×24 grid for Telefact pages
+        # Safe area for 40×24 grid (simulate CRT overscan)
         self.cols, self.rows = 40, 24
-        self.cell_w = max(1, width // self.cols)
-        self.cell_h = max(1, height // self.rows)
-        self.w = self.cell_w * self.cols
-        self.h = self.cell_h * self.rows
+        self.margin_x = 24
+        self.margin_y = 24
+        self.inner_w = width - self.margin_x * 2
+        self.inner_h = height - self.margin_y * 2
 
+        self.cell_w = self.inner_w // self.cols
+        self.cell_h = self.inner_h // self.rows
+        self.w = self.inner_w
+        self.h = self.inner_h
+
+        # Colours
+        self.colors = {
+            "Background": "black",
+            "Grid": "#303030"
+        }
+        if colors:
+            self.colors.update(colors)
+
+        # Canvas covers the whole window
         self.canvas = tk.Canvas(
-            root, width=self.w, height=self.h,
-            highlightthickness=0, bg=PALETTE["black"]
+            root,
+            width=self.width,
+            height=self.height,
+            highlightthickness=0,
+            bg=PALETTE.get(self.colors["Background"], self.colors["Background"]),
         )
         self.canvas.pack()
 
-        # simple monospace font; will swap for Teletext font later
-        self.font = ("Courier New", max(12, self.cell_h - 9), "bold")
+        # Font setup
+        self.font = self._load_font(font_path, font_size)
 
-    # ----- low-level drawing helpers -----
+    # ----------------------------------------------------------------------
+    def _load_font(self, font_path: str | None, font_size: int) -> tuple:
+        if font_path and os.path.exists(font_path):
+            try:
+                font_name = os.path.splitext(os.path.basename(font_path))[0]
+                try:
+                    self.root.tk.call(
+                        "font", "create", font_name, "-family", font_name, "-size", font_size
+                    )
+                except tk.TclError:
+                    pass
+                print(f"[info] Loaded Telefact font: {font_name}")
+                return (font_name, font_size)
+            except Exception as e:
+                print(f"[warn] Could not load custom font ({e}). Falling back to Courier New.")
+        elif font_path:
+            print(f"[warn] Font path not found: {font_path}. Using Courier New.")
+        return ("Courier New", font_size, "bold")
+
+    # ----------------------------------------------------------------------
     def _gx(self, col: int) -> int:
-        return col * self.cell_w
+        return self.margin_x + col * self.cell_w
 
     def _gy(self, row: int) -> int:
-        return row * self.cell_h
-
-    def _fill_row(self, row: int, color: str) -> None:
-        self.canvas.create_rectangle(
-            self._gx(0), self._gy(row), self._gx(self.cols), self._gy(row + 1),
-            fill=PALETTE.get(color, color), width=0
-        )
+        return self.margin_y + row * self.cell_h
 
     def _draw_char(self, col: int, row: int, char: str, color: str) -> None:
+        """Draw a single glyph."""
         x = self._gx(col) + 2
         y = self._gy(row) + self.cell_h // 2
         self.canvas.create_text(
-            x, y, anchor="w", text=char,
-            font=self.font, fill=PALETTE.get(color, color)
+            x, y, anchor="w", text=char, font=self.font, fill=PALETTE.get(color, color)
         )
 
     def _draw_grid(self) -> None:
+        """Debug overlay for exact cell spacing."""
         for c in range(self.cols + 1):
             x = self._gx(c)
-            self.canvas.create_line(x, 0, x, self.h, fill="#202020")
+            self.canvas.create_line(
+                x, self.margin_y, x, self.margin_y + self.h, fill=self.colors["Grid"]
+            )
         for r in range(self.rows + 1):
             y = self._gy(r)
-            self.canvas.create_line(0, y, self.w, y, fill="#202020")
+            self.canvas.create_line(
+                self.margin_x, y, self.margin_x + self.w, y, fill=self.colors["Grid"]
+            )
 
-    # ----- public API -----
+    # ----------------------------------------------------------------------
     def render(self, frame: TelefactFrame) -> None:
-        """Paint the whole frame to the canvas."""
+        """Render just the text grid; no header/footer bars."""
         self.canvas.delete("all")
 
-        # background
-        self.canvas.create_rectangle(0, 0, self.w, self.h,
-                                     fill=PALETTE["black"], width=0)
+        # Fill total background
+        self.canvas.create_rectangle(
+            0, 0, self.width, self.height,
+            fill=PALETTE.get(self.colors["Background"], self.colors["Background"]),
+            width=0,
+        )
 
-        # header/footer colour bands
-        for r in frame.header_region():
-            self._fill_row(r, "blue")
-        for r in frame.footer_region():
-            self._fill_row(r, "red")
-
-        # draw text cells
+        # Draw Teletext cells
         for row in range(frame.rows):
             for col in range(frame.cols):
                 ch, fg = frame.grid[row][col]