reorderUpdate method
Implementation
void reorderUpdate(double dx, double dy) {
if (!isReordering) return;
_reorderLayoutData!.update(constraints, dx, dy);
final pickedListIndex = _reorderLayoutData!.pickedListIndex;
final dropListIndex = _reorderLayoutData!.dropListIndex;
final delegate = childManager.widget.delegate;
final newSlot = delegate.reorderModel?.onReorderFeedback.call(
pickedListIndex,
dropListIndex,
_reorderLayoutData!.currentMainAxisOffset,
_reorderLayoutData!.crossAxisDelta,
_reorderLayoutData!.mainAxisLocalOffset);
intervalManager.reorderUpdateSlot(newSlot);
markSafeNeedsLayout();
}