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 groupedColumns = List<int>.from(context.state.group.groupedColumnIds);

  if (!groupedColumns.contains(columnId)) {
    groupedColumns.add(columnId);
  }

  return context.state.copyWith(
    group: context.state.group.copyWith(groupedColumnIds: groupedColumns),
  );
}