debugPaint method Null safety

  1. @override
void debugPaint(
  1. PaintingContext context,
  2. Offset offset
)
override

Override this method to paint debugging information.

Implementation

@override
void debugPaint(PaintingContext context, Offset offset) {
  super.debugPaint(context, offset);
  assert(() {
    if (debugPaintSizeEnabled) {
      final Size parentSize = getAbsoluteSize();
      final Rect outerRect = offset & parentSize;
      Rect? innerRect;
      if (child != null) {
        final Size childSize = child!.getAbsoluteSize();
        final SliverPhysicalParentData childParentData = child!.parentData! as SliverPhysicalParentData;
        innerRect = (offset + childParentData.paintOffset) & childSize;
        assert(innerRect.top >= outerRect.top);
        assert(innerRect.left >= outerRect.left);
        assert(innerRect.right <= outerRect.right);
        assert(innerRect.bottom <= outerRect.bottom);
      }
      debugPaintPadding(context.canvas, outerRect, innerRect);
    }
    return true;
  }());
}