apply<T extends DataGridRow> method

@override DataGridState<T>? apply<T extends DataGridRow>(EventContext<T> context)

Apply this event's transformation to the state. Returns the new state, or null if no state change should occur. Can return a Future for async operations.

Implementation

@override
DataGridState<T>? apply<T extends DataGridRow>(EventContext<T> context) {
  final cellId = '${rowId}_$columnId';
  final current = List<String>.from(context.state.selection.focusedCells);

  if (current.contains(cellId)) {
    current.remove(cellId);
  } else {
    current.add(cellId);
  }

  return context.state.copyWith(
    selection: context.state.selection.copyWith(focusedCells: current),
  );
}