UndoAction.h

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/***************************************************************************
           UndoAction.h  -  Abstract base class for undo actions
                             -------------------
    begin                : Sat May 26 2001
    copyright            : (C) 2001 by Thomas Eschenbacher
    email                : Thomas Eschenbacher <Thomas.Eschenbacher@gmx.de>

 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   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 UNDO_ACTION_H
#define UNDO_ACTION_H

#include "config.h"

#include <QtGlobal>
#include <QString>

#include "libkwave/String.h"

namespace Kwave
{

    class SignalManager;

    class Q_DECL_EXPORT UndoAction
    {

    public:

        virtual ~UndoAction()
        {
        }

        virtual QString description() = 0;

        virtual qint64 undoSize() = 0;

        virtual qint64 redoSize() = 0;

        virtual bool store(Kwave::SignalManager &manager) = 0;

        virtual Kwave::UndoAction *undo(Kwave::SignalManager &manager,
                                        bool with_redo) = 0;

        virtual bool containsModification() const { return true; }

        virtual void dump(const QString &indent) {
            qDebug("%s%s", DBG(indent), DBG(description()));
        }

    };
}

#endif /* UNDO_ACTION_H */

//***************************************************************************
//***************************************************************************