private void View_KeyframeDeleting(object sender, KeyframeEventArgs e)
{
HistoryMemento memento = new HistoryMementoDeleteKeyframe(frameServer.Metadata, e.KeyframeId);
frameServer.Metadata.DeleteKeyframe(e.KeyframeId);
historyStack.PushNewCommand(memento);
}
public override HistoryMemento PerformUndo()
{
HistoryMemento redoMemento = new HistoryMementoDeleteKeyframe(metadata, keyframeId);
redoMemento.CommandName = CommandName;
metadata.DeleteKeyframe(keyframeId);
return(redoMemento);
}