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/*
**************************************************************************
description
--------------------
copyright : (C) 2000-2001 by Andreas Zehender
email : [email protected]
**************************************************************************
**************************************************************************
* *
* 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. *
* *
**************************************************************************/
#ifndef PMDATACHANGECOMMAND_H
#define PMDATACHANGECOMMAND_H
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "pmcommand.h"
class PMMemento;
/**
* Command that stores undo information for object changes
*
* Let an object create a @ref PMMemento, change the objects data, take the
* memento and create a PMDataChangeCommand with this memento.
*
* Then execute the command. The object will not be changed again!
*/
class PMDataChangeCommand : public PMCommand
{
public:
/**
* Creates a PMDataChangeCommand for the memento
*/
PMDataChangeCommand( PMMemento* memento );
/**
* Deletes the command. The memento will be deleted.
*/
virtual ~PMDataChangeCommand( );
protected:
/**
* Executes the command
*/
virtual void execute( PMCommandManager* theManager );
/**
* Undo the command
*/
virtual void undo( PMCommandManager* theManager );
private:
void signalChanges( PMCommandManager* theManager, PMMemento* memento );
PMMemento* m_pNewState;
PMMemento* m_pOldState;
bool m_executed;
bool m_unexecuted;
};
#endif
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