public void Perform(OgmoAction action)
{
if (action == null)
{
return;
}
//If a batch is in progress, stop it!
EndBatch();
//If you're over the undo limit, chop off an action
while (UndoStack.Count >= Properties.Settings.Default.UndoLimit)
{
UndoStack.RemoveFirst();
}
//If the level is so-far unchanged, change it and store that fact
if (!Level.Changed)
{
action.LevelWasChanged = false;
Level.Changed = true;
}
//Add the action to the undo stack and then do it!
UndoStack.AddLast(action);
action.Do();
//Clear the redo stack
RedoStack.Clear();
}
public void BatchPerform(OgmoAction action)
{
if (action == null)
{
return;
}
batch.Add(action);
action.Do();
}
public void Redo()
{
if (RedoStack.Count > 0)
{
//Remove it
OgmoAction action = RedoStack.Last.Value;
RedoStack.RemoveLast();
//Redo it
action.Do();
//Mark level as changed
Level.Changed = true;
//Add it to the undo stack
UndoStack.AddLast(action);
}
}
public void Undo()
{
if (UndoStack.Count > 0)
{
//Remove it
OgmoAction action = UndoStack.Last.Value;
UndoStack.RemoveLast();
//Undo it
action.Undo();
//Roll back level changed flag
Level.Changed = action.LevelWasChanged;
//Add it to the redo stack
RedoStack.AddLast(action);
}
}