deleteItem method

Implementation

Future<bool> deleteItem(int? index) async {
  try {
    // get index
    index ??= myDataSource?.data?.indexOf(data) ?? 0;
    if (index < 0) index = 0;
    if (index > items.length) index = items.length;

    // lookup the item
    var item = items.containsKey(index) ? items[index] : null;
    if (item != null) {
      // fire the rows onDelete event
      bool ok = await item.onDeleteHandler();

      // continue?
      if (ok) {
        // reorder hashmap
        deleteInHashmap(items, index);

        // remove the data associated with the row
        notificationsEnabled = false;
        myDataSource?.delete(index, notifyListeners: false);
        data = myDataSource?.data ?? data;
        notificationsEnabled = true;

        // notify
        data = myDataSource?.notify();
      }
    }
  } catch (e) {
    Log().exception(e);
  }
  return true;
}