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/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this
** file. Please review the following information to ensure the GNU Lesser
** General Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef QMEDIAPLAYLISTNAVIGATOR_H
#define QMEDIAPLAYLISTNAVIGATOR_H

#include "qmediaplaylistprovider.h"
#include "qmediaplaylist.h"
#include <QtCore/qobject.h>

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

QT_MODULE(Multimedia)


class QMediaPlaylistNavigatorPrivate;
class Q_MULTIMEDIA_EXPORT QMediaPlaylistNavigator : public QObject
{
    Q_OBJECT
    Q_PROPERTY(QMediaPlaylist::PlaybackMode playbackMode READ playbackMode WRITE setPlaybackMode NOTIFY playbackModeChanged)
    Q_PROPERTY(int currentIndex READ currentIndex WRITE jump NOTIFY currentIndexChanged)
    Q_PROPERTY(QMediaContent currentItem READ currentItem)

public:
    QMediaPlaylistNavigator(QMediaPlaylistProvider *playlist, QObject *parent = 0);
    virtual ~QMediaPlaylistNavigator();

    QMediaPlaylistProvider *playlist() const;
    void setPlaylist(QMediaPlaylistProvider *playlist);

    QMediaPlaylist::PlaybackMode playbackMode() const;

    QMediaContent currentItem() const;
    QMediaContent nextItem(int steps = 1) const;
    QMediaContent previousItem(int steps = 1) const;

    QMediaContent itemAt(int position) const;

    int currentIndex() const;
    int nextIndex(int steps = 1) const;
    int previousIndex(int steps = 1) const;

public Q_SLOTS:
    void next();
    void previous();

    void jump(int);

    void setPlaybackMode(QMediaPlaylist::PlaybackMode mode);

Q_SIGNALS:
    void activated(const QMediaContent &content);
    void currentIndexChanged(int);
    void playbackModeChanged(QMediaPlaylist::PlaybackMode mode);

    void surroundingItemsChanged();

protected:
    QMediaPlaylistNavigatorPrivate *d_ptr;

private:
    Q_DISABLE_COPY(QMediaPlaylistNavigator)
    Q_DECLARE_PRIVATE(QMediaPlaylistNavigator)

    Q_PRIVATE_SLOT(d_func(), void _q_mediaInserted(int start, int end))
    Q_PRIVATE_SLOT(d_func(), void _q_mediaRemoved(int start, int end))
    Q_PRIVATE_SLOT(d_func(), void _q_mediaChanged(int start, int end))
};

QT_END_NAMESPACE

QT_END_HEADER


#endif // QMEDIAPLAYLISTNAVIGATOR_H