2 Copyright (C) 2010 Paul Davis
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 #include "pbd/command.h"
27 /** A Command which stores its action as the differences between the before and after
28 * state of a Stateful object.
30 class StatefulDiffCommand : public Command
33 StatefulDiffCommand (Stateful *);
34 StatefulDiffCommand (Stateful *, XMLNode const &);
35 ~StatefulDiffCommand ();
40 XMLNode& get_state ();
43 Stateful* _object; ///< the object in question
44 XMLNode* _before; ///< XML node containing the previous values of XML properties which changed
45 XMLNode* _after; ///< XML node containing the new values of XML properties which changed