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/***************************************************************************
UndoModifyAction.h - UndoAction for modifications on samples
-------------------
begin : May 25 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_MODIFY_ACTION_H_
#define _UNDO_MODIFY_ACTION_H_
#include "config.h"
#include <qmemarray.h>
#include <qstring.h>
#include "libkwave/Sample.h"
#include "libkwave/Track.h"
#include "UndoAction.h"
class UndoModifyAction: public UndoAction
{
public:
/**
* Constructor.
* @param track index of the track
* @param offset index of the first modified sample
* @param length number of samples
*/
UndoModifyAction(unsigned int track, unsigned int offset,
unsigned int length);
/** Destructor */
virtual ~UndoModifyAction();
/** @see UndoAction::description() */
virtual QString description();
/** @see UndoAction::undoSize() */
virtual unsigned int undoSize();
/** @see UndoAction::redoSize() */
virtual int redoSize() { return 0; } ;
/**
* @see UndoAction::store()
*/
virtual void store(SignalManager &manager);
/**
* Exchange samples from the current signal and the internal undo
* buffer. So this instance will be re-used for redo and so does not
* require any extra memory for redo.
* @see UndoAction::undo()
*/
virtual UndoAction *undo(SignalManager &manager, bool with_redo);
protected:
/** index of the modified track */
unsigned int m_track;
/** first sample */
unsigned int m_offset;
/** number of samples */
unsigned int m_length;
/** track that serves as buffer with undo data */
Track m_buffer_track;
};
#endif /* _UNDO_MODIFY_ACTION_H_ */
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