canvas property Null safety

  1. @override
Canvas canvas
override

The canvas on which to paint.

The current canvas can change whenever you paint a child using this context, which means it's fragile to hold a reference to the canvas returned by this getter.

Implementation

@override
Canvas get canvas {
  if (_canvas == null) {
    _startRecording();
  }
  assert(_currentLayer != null);
  return _canvas!;
}