stateful_diff_command.h

Go to the documentation of this file.

/*
    Copyright (C) 2010 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.

*/

#ifndef __pbd_stateful_diff_command_h__
#define __pbd_stateful_diff_command_h__

#include <boost/shared_ptr.hpp>
#include <boost/weak_ptr.hpp>

#include "pbd/libpbd_visibility.h"
#include "pbd/command.h"

namespace PBD
{

class StatefulDestructible;     
class PropertyList;

class LIBPBD_API StatefulDiffCommand : public Command
{
public:
        StatefulDiffCommand (boost::shared_ptr<StatefulDestructible>);
        StatefulDiffCommand (boost::shared_ptr<StatefulDestructible>, XMLNode const &);
        ~StatefulDiffCommand ();

        void operator() ();
        void undo ();
        
        XMLNode& get_state ();

        bool empty () const;

private:
        boost::weak_ptr<Stateful> _object; 
        PBD::PropertyList* _changes; 
};

};

#endif /* __pbd_stateful_diff_command_h__ */