WidgetPosition class

Utility for finding widget positions in screen coordinates.

Since palettes run in separate Flutter engines, each palette has its own coordinate system. This class helps convert local widget positions to screen coordinates that can be used for positioning other palettes.

Platform differences (macOS vs Windows coordinate systems) are handled automatically.

Usage in a Palette

class EditorPalette extends StatefulWidget {
  @override
  State<EditorPalette> createState() => _EditorPaletteState();
}

class _EditorPaletteState extends State<EditorPalette> {
  final _textFieldKey = GlobalKey();
  final _positionHelper = WidgetPosition();

  void _onSlashTyped() async {
    // Set window bounds first
    _positionHelper.windowBounds = await PaletteSelf.screenRect;

    // Get text field's screen position
    final textFieldRect = _positionHelper.getWidgetRect(_textFieldKey);
    if (textFieldRect != null) {
      // Send position to host for slash menu placement
      PaletteMessenger.send('show-slash-menu', {
        'x': textFieldRect.bottomLeft.dx,
        'y': textFieldRect.bottomLeft.dy,
      });
    }
  }

  @override
  Widget build(BuildContext context) {
    return TextField(key: _textFieldKey, ...);
  }
}

Properties