performLayout method

@override void performLayout()

if no child or the size of RenderSlideAction is empty, do nothing typically, if RenderSlideAction is not visible, its size would be empty only the visible RenderSlideAction would be laid out and painted the layout process is delegated to the BaseActionLayoutDelegate created from ActionLayout

Implementation

@override
void performLayout() {
  final child = firstChild;
  final position = (parentData as SlidableBoxData).position!;

  if (child == null) {
    return;
  }

  final layoutDelegate = _actionLayout.buildDelegate(
    position,
    controller: controller,
  );

  layoutDelegate.layout(
    firstChild!,
    size,
    childCount,
    ratio: slidePercent.value.abs(),
    axis: _slideAxis,
  );
}