insertSlot method
void
insertSlot(
- int index,
- T? item, {
- bool update = true,
})
Implementation
void insertSlot(int index, T? item, {bool update = true}) {
// print('insertSlot $index');
final entry = _create(index, item);
final keys = _relationship.keys.toList();
final values = _relationship.values.toList();
keys.insert(index, entry.key);
values.insert(index, entry.value);
final Iterable<MapEntry<DraggableSlot<T>, DraggableWidget<T>?>> entries =
Iterable.generate(
keys.length,
(index) => MapEntry(keys[index], values[index]),
);
_relationship
..clear()
..addEntries(entries);
if (mounted && update) {
_updateSlots();
setState(() {});
}
widget.onChanged?.call(items);
}