paint method

@override void paint(PaintingContext context, Offset offset)

Paints children, clipped to this box's bounds when layout overflowed.

Without the clip an overflowing child paints into whatever region the parent assigned to a following sibling — rows interleave and content escapes its box. Clipping only on recorded overflow mirrors Flutter's RenderFlex and leaves the ordinary fitting layout untouched.

Implementation

@override
void paint(PaintingContext context, Offset offset) {
  if (!_hasOverflow) {
    super.paint(context, offset);
    return;
  }
  context.canvas.save();
  try {
    context.canvas.clipRect(
      Rect.fromLTWH(offset.dx + x, offset.dy + y, size.width, size.height),
    );
    super.paint(context, offset);
  } finally {
    context.canvas.restore();
  }
}