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 newRowsById = Map<double, T>.from(context.state.rowsById);
  newRowsById.remove(rowId);

  final newDisplayOrder = context.state.displayOrder
      .where((id) => id != rowId)
      .toList();

  context.dataIndexer.setData(newRowsById);

  final selectedRows = Set<double>.from(
    context.state.selection.selectedRowIds,
  );
  selectedRows.remove(rowId);

  final newTotalItems = context.state.totalItems - 1;
  final pagination = context.state.pagination;
  final newTotalPages = pagination.totalPages(newTotalItems);
  final adjustedPage = pagination.currentPage > newTotalPages
      ? newTotalPages
      : pagination.currentPage;

  return context.state.copyWith(
    rowsById: newRowsById,
    displayOrder: newDisplayOrder,
    totalItems: newTotalItems,
    pagination: pagination.copyWith(currentPage: adjustedPage),
    selection: context.state.selection.copyWith(
      selectedRowIds: selectedRows,
      focusedRowId: context.state.selection.focusedRowId == rowId
          ? null
          : context.state.selection.focusedRowId,
    ),
  );
}