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 80 2006-06-22T22:37:01.079855Z fugalh $
21 #ifndef __lib_pbd_command_h__
22 #define __lib_pbd_command_h__
24 #include <pbd/stateful.h>
26 class Command : public Stateful
30 virtual void operator() () = 0;
31 virtual void undo() = 0;
32 virtual void redo() { (*this)(); }
33 virtual XMLNode &get_state();
34 virtual int set_state(const XMLNode&) { /* noop */ return 0; }
37 #endif // __lib_pbd_command_h_