ReorderableListState class

The state for a list that allows the user to interactively reorder the list items.

An app that needs to start a new item drag or cancel an existing one can refer to the ReorderableList's state with a global key:

GlobalKey<ReorderableListState> listKey = GlobalKey<ReorderableListState>();
// ...
Widget build(BuildContext context) {
  return ReorderableList(
    key: listKey,
    itemBuilder: (BuildContext context, int index) => const SizedBox(height: 10.0),
    itemCount: 5,
    onReorderItem: (int oldIndex, int newIndex) {
       // ...
    },
  );
}
// ...
listKey.currentState!.cancelReorder();