public override HistoryMemento PerformUndo()
{
HistoryMemento redoMemento = new HistoryMementoAddKeyframe(metadata, keyframeId);
redoMemento.CommandName = commandName;
Keyframe keyframe = KeyframeSerializer.DeserializeMemento(data, metadata);
metadata.AddKeyframe(keyframe);
return(redoMemento);
}
private void View_KeyframeAdding(object sender, TimeEventArgs e)
{
if (frameServer.CurrentImage == null)
{
return;
}
long time = e.Time;
string timecode = frameServer.TimeStampsToTimecode(time, TimeType.UserOrigin, PreferencesManager.PlayerPreferences.TimecodeFormat, true);
Keyframe keyframe = new Keyframe(time, timecode, frameServer.Metadata);
HistoryMementoAddKeyframe memento = new HistoryMementoAddKeyframe(frameServer.Metadata, keyframe.Id);
frameServer.Metadata.AddKeyframe(keyframe);
historyStack.PushNewCommand(memento);
}