2 Copyright (C) 2006 Hans Fugal & 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.
18 $Id: /local/undo/libs/pbd3/pbd/undo.h 132 2006-06-29T18:45:16.609763Z fugalh $
21 #ifndef __lib_pbd_memento_command_h__
22 #define __lib_pbd_memento_command_h__
28 #include <pbd/command.h>
29 #include <pbd/stacktrace.h>
30 #include <pbd/xml++.h>
31 #include <pbd/shiva.h>
33 #include <sigc++/slot.h>
36 /** This command class is initialized with before and after mementos
37 * (from Stateful::get_state()), so undo becomes restoring the before
38 * memento, and redo is restoring the after memento.
41 template <class obj_T>
42 class MementoCommand : public Command
45 MementoCommand(obj_T &object,
49 : obj(object), before(before), after(after) {
50 /* catch destruction of the object */
51 new PBD::Shiva<obj_T,MementoCommand<obj_T> > (object, *this);
66 obj.set_state(*after);
71 obj.set_state(*before);
73 virtual XMLNode &get_state()
77 name = "MementoCommand";
79 name = "MementoUndoCommand";
81 name = "MementoRedoCommand";
84 XMLNode *node = new XMLNode(name);
86 node->add_property("obj_id", obj.id().to_s());
87 node->add_property("type_name", typeid(obj).name());
90 node->add_child_copy(*before);
92 node->add_child_copy(*after);
99 XMLNode *before, *after;
102 #endif // __lib_pbd_memento_h__