MimeData.h

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/***************************************************************************
             MimeData.h  -  mime data container for Kwave's audio data
                             -------------------
    begin                : Oct 04 2008
    copyright            : (C) 2008 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 MIME_DATA_H
#define MIME_DATA_H

#include "config.h"

#include <QtGlobal>
#include <QByteArray>
#include <QMimeData>
#include <QObject>

#include "libkwave/MemoryManager.h"
#include "libkwave/Sample.h"

class QWidget;

namespace Kwave
{

    class MetaDataList;
    class MultiTrackReader;
    class SignalManager;

    class Q_DECL_EXPORT MimeData: public QMimeData
    {
        Q_OBJECT
        public:
            MimeData();

            virtual ~MimeData() Q_DECL_OVERRIDE;

            virtual bool encode(QWidget *widget,
                                Kwave::MultiTrackReader &src,
                                const Kwave::MetaDataList &meta_data);

            static sample_index_t decode(QWidget *widget, const QMimeData *e,
                                         Kwave::SignalManager &sig,
                                         sample_index_t pos);

            virtual void clear();

        private:
            class Buffer: public QIODevice
            {
            public:
                Buffer();

                virtual ~Buffer() Q_DECL_OVERRIDE;

                virtual qint64 size() const Q_DECL_OVERRIDE { return m_size; }

                bool mapToByteArray();

                inline const QByteArray &byteArray() const { return m_data; }

                virtual void close() Q_DECL_OVERRIDE;

            protected:
                virtual qint64 readData(char *data, qint64 maxlen)
                    Q_DECL_OVERRIDE;

                virtual qint64 writeData(const char *data, qint64 len)
                    Q_DECL_OVERRIDE;

            private:
                Kwave::Handle m_block;

                qint64 m_size;

                QByteArray m_data;
            };

        private:

            Kwave::MimeData::Buffer m_buffer;

    };
}

#endif /* MIME_DATA_H */

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