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/*
Copyright (C) 2006 Hans Fugal & Paul Davis
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
$Id: /local/undo/libs/pbd3/pbd/undo.h 80 2006-06-22T22:37:01.079855Z fugalh $
*/
#ifndef __lib_pbd_command_h__
#define __lib_pbd_command_h__
#include <pbd/statefuldestructible.h>
class Command : public PBD::StatefulDestructible
{
public:
virtual ~Command() {}
virtual void operator() () = 0;
virtual void undo() = 0;
virtual void redo() { (*this)(); }
virtual XMLNode &get_state();
virtual int set_state(const XMLNode&) { /* noop */ return 0; }
};
#endif // __lib_pbd_command_h_
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