private void View_MultiDrawingItemDeleting(object sender, MultiDrawingItemEventArgs e)
{
HistoryMemento memento = new HistoryMementoDeleteMultiDrawingItem(frameServer.Metadata, e.Manager, e.Item.Id, SerializationFilter.All);
frameServer.Metadata.DeleteMultiDrawingItem(e.Manager, e.Item.Id);
historyStack.PushNewCommand(memento);
}
public override HistoryMemento PerformUndo()
{
HistoryMemento redoMemento = new HistoryMementoDeleteMultiDrawingItem(metadata, manager, itemId, SerializationFilter.All);
redoMemento.CommandName = commandName;
metadata.DeleteMultiDrawingItem(manager, itemId);
return(redoMemento);
}