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/***************************************************************************
UndoDeleteAction.h - UndoAction for deletion of a range of samples
-------------------
begin : Jun 08 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_DELETE_ACTION_H
#define UNDO_DELETE_ACTION_H
#include "config.h"
#include <QList>
#include <QString>
#include <QVector>
#include "libkwave/MetaDataList.h"
#include "libkwave/Sample.h"
#include "libkwave/String.h"
#include "libkwave/undo/UndoAction.h"
class QWidget;
namespace Kwave
{
class SignalManager;
class UndoDeleteAction: public Kwave::UndoAction
{
public:
/**
* Constructor.
* @param parent_widget the widget used as parent for displaying
* error messages
* @param track_list list of affected tracks
* @param offset index of the first deleted sample
* @param length number of samples to delete
*/
UndoDeleteAction(QWidget *parent_widget,
const QVector<unsigned int> &track_list,
sample_index_t offset, sample_index_t length);
/** Destructor */
~UndoDeleteAction() override;
/** @see UndoAction::description() */
QString description() override;
/** @see UndoAction::undoSize() */
qint64 undoSize() override;
/** @see UndoAction::redoSize() */
qint64 redoSize() override;
/**
* Stores the data needed for undo.
* @param manager the SignalManager for modifying the signal
* @note this is the second step, after size() has been called
* @return true if successful, false if failed (e.g. out of memory)
*/
bool store(Kwave::SignalManager &manager) override;
/**
* Copies the samples to be deleted to the internal buffer.
* @see UndoAction::undo()
*/
Kwave::UndoAction *undo(Kwave::SignalManager &manager,
bool with_redo) override;
/** dump, for debugging purposes */
void dump(const QString &indent) override;
private:
/** parent widget for showing error messages */
QWidget *m_parent_widget;
/** storage for all deleted stripes */
QList<Kwave::Stripe::List> m_stripes;
/** storage for the affected meta data items */
Kwave::MetaDataList m_meta_data;
/** list of affected tracks */
QVector<unsigned int> m_track_list;
/** first deleted sample */
sample_index_t m_offset;
/** number of deleted samples */
sample_index_t m_length;
/** memory needed for undo */
unsigned int m_undo_size;
};
}
#endif /* UNDO_DELETE_ACTION_H */
//***************************************************************************
//***************************************************************************
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