layout method

@override PwBox layout(Context context, BoxConstraints constraints)

layout API.

Implementation

@override
PwBox layout(Context context, BoxConstraints constraints) {
  final Widget? kid = child;
  final PwBox? box = kid?.layout(context, constraints);
  final PwSize raw = box?.size ?? size ?? PwSize.zero;
  final bool fillWidth =
      size == null && kid == null && constraints.hasBoundedWidth;
  final bool fillHeight =
      size == null && kid == null && constraints.hasBoundedHeight;
  final PwSize painted = constraints.constrain(
    PwSize(
      fillWidth ? constraints.maxWidth : raw.width,
      fillHeight ? constraints.maxHeight : raw.height,
    ),
  );
  return _CustomPaintBox(painted, box, painter, foregroundPainter);
}