public static void Undo()
{
UndoableAction cmd = Instance.removeFromUndo();
cmd.Undo();
Instance.addToRedo(cmd);
}
public static void Redo()
{
UndoableAction cmd = Instance.removeFromRedo();
cmd.Execute();
Instance.addToUndo(cmd);
}
private void addToRedo(UndoableAction c)
{
_redoCommands.Push(c);
if (_redoCommands.Count == 1)
{
OnPropertyChanged("CanRedo");
}
}
private UndoableAction removeFromRedo()
{
UndoableAction result = _redoCommands.Pop();
if (_redoCommands.Count == 0)
{
OnPropertyChanged("CanRedo");
}
return(result);
}
public static void Execute(UndoableAction cmd)
{
cmd.Execute();
Instance.addToUndo(cmd);
}