updateChild method

  1. @override
Element? updateChild(
  1. Element? child,
  2. Widget? newWidget,
  3. dynamic newSlot
)
override

Copied from SliverMultiBoxAdaptorElement.updateChild.

Implementation

@override
Element? updateChild(
    final Element? child, final Widget? newWidget, final dynamic newSlot) {
  final oldParentData = _parentDataOf(child);
  final newChild = super.updateChild(child, newWidget, newSlot);
  final newParentData = _parentDataOf(newChild);

  // Preserve the old layoutOffset if the renderObject was swapped out.
  if (oldParentData != newParentData &&
      oldParentData != null &&
      newParentData != null) {
    newParentData.layoutOffset = oldParentData.layoutOffset;
  }
  return newChild;
}