render method

@override void render()

Recalculates layout and paints the widget tree to the internal buffer.

Implementation

@override
void render() {
  if (_isDisposed) return;
  final rootElement = _rootElement;
  final buffer = _currentBuffer;
  if (rootElement == null || buffer == null) return;

  // Rebuild the element tree to consume any new state modifications.
  _buildOwner?.buildScope();

  buffer.clear();
  // Render the rebuilt element tree on our double buffer canvas.
  rootElement.layout(BoxConstraints.tight(Size(_width, _computedHeight)));
  rootElement.paint(buffer, Offset.zero);

  if (debugPaintHoverEnabled && _lastMousePosition != null) {
    final hovered = _findHoveredElement(rootElement, _lastMousePosition);
    if (hovered != null) {
      _highlightHoveredElement(buffer, hovered);
    }
  }

  if (mode == ExecutionMode.standalone) {
    if (debugMouseCursorEnabled && _lastMousePosition != null) {
      final pos = _lastMousePosition!;
      final cursorStyle = Style(
        foreground: const Color(0, 255, 255),
        modifiers: Modifier.bold,
      );
      buffer.writeString(pos.x - 1, pos.y - 1, '⦿', cursorStyle);
    }
  }

  onFramePainted?.call(buffer);
  onNeedVisualUpdate?.call();

  if (mode == ExecutionMode.standalone) {
    final b = terminal.backend;
    if (b is BufferedTerminalBackend) {
      b.buffer = buffer;
    }

    final sb = StringBuffer();
    _renderer?.render(buffer, sb);
    if (sb.isNotEmpty) {
      b.write(sb.toString());
    }
  }
}