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    41 

    42 #ifndef QMEDIAPLAYLIST_H

    43 #define QMEDIAPLAYLIST_H

    44 

    45 #include <QtCore/qobject.h>

    46 

    47 #include <qmediacontent.h>

    48 #include <qmediaobject.h>

    49 #include <qmediabindableinterface.h>

    50 

    51 

    52 QT_BEGIN_NAMESPACE

    53 

    54 class QMediaPlaylistProvider;

    55 

    56 class QMediaPlaylistPrivate;

    57 class Q_MULTIMEDIA_EXPORT QMediaPlaylist : public QObject, public QMediaBindableInterface

    58 {

    59     Q_OBJECT

    60     Q_INTERFACES(QMediaBindableInterface)

    61     Q_PROPERTY(QMediaPlaylist::PlaybackMode playbackMode READ playbackMode WRITE setPlaybackMode NOTIFY playbackModeChanged)

    62     Q_PROPERTY(QMediaContent currentMedia READ currentMedia NOTIFY currentMediaChanged)

    63     Q_PROPERTY(int currentIndex READ currentIndex WRITE setCurrentIndex NOTIFY currentIndexChanged)

    64     Q_ENUMS(PlaybackMode Error)

    65 

    66 public:

    67     enum PlaybackMode { CurrentItemOnce, CurrentItemInLoop, Sequential, Loop, Random };

    68     enum Error { NoError, FormatError, FormatNotSupportedError, NetworkError, AccessDeniedError };

    69 

    70     QMediaPlaylist(QObject *parent = 0);

    71     virtual ~QMediaPlaylist();

    72 

    73     QMediaObject *mediaObject() const;

    74 

    75     PlaybackMode playbackMode() const;

    76     void setPlaybackMode(PlaybackMode mode);

    77 

    78     int currentIndex() const;

    79     QMediaContent currentMedia() const;

    80 

    81     int nextIndex(int steps = 1) const;

    82     int previousIndex(int steps = 1) const;

    83 

    84     QMediaContent media(int index) const;

    85 

    86     int mediaCount() const;

    87     bool isEmpty() const;

    88     bool isReadOnly() const;

    89 

    90     bool addMedia(const QMediaContent &content);

    91     bool addMedia(const QList<QMediaContent> &items);

    92     bool insertMedia(int index, const QMediaContent &content);

    93     bool insertMedia(int index, const QList<QMediaContent> &items);

    94     bool removeMedia(int pos);

    95     bool removeMedia(int start, int end);

    96     bool clear();

    97 

    98     void load(const QUrl &location, const char *format = 0);

    99     void load(QIODevice * device, const char *format = 0);

   100 

   101     bool save(const QUrl &location, const char *format = 0);

   102     bool save(QIODevice * device, const char *format);

   103 

   104     Error error() const;

   105     QString errorString() const;

   106 

   107 public Q_SLOTS:

   108     void shuffle();

   109 

   110     void next();

   111     void previous();

   112 

   113     void setCurrentIndex(int index);

   114 

   115 Q_SIGNALS:

   116     void currentIndexChanged(int index);

   117     void playbackModeChanged(QMediaPlaylist::PlaybackMode mode);

   118     void currentMediaChanged(const QMediaContent&);

   119 

   120     void mediaAboutToBeInserted(int start, int end);

   121     void mediaInserted(int start, int end);

   122     void mediaAboutToBeRemoved(int start, int end);

   123     void mediaRemoved(int start, int end);

   124     void mediaChanged(int start, int end);

   125 

   126     void loaded();

   127     void loadFailed();

   128 

   129 protected:

   130     bool setMediaObject(QMediaObject *object);

   131     QMediaPlaylistPrivate *d_ptr;

   132 

   133 private:

   134     Q_DECLARE_PRIVATE(QMediaPlaylist)

   135     Q_PRIVATE_SLOT(d_func(), void _q_loadFailed(QMediaPlaylist::Error, const QString &))

   136 };

   137 

   138 QT_END_NAMESPACE

   139 

   140 Q_DECLARE_METATYPE(QMediaPlaylist::PlaybackMode)

   141 Q_DECLARE_METATYPE(QMediaPlaylist::Error)

   142 

   143 

   144 #endif  // QMEDIAPLAYLIST_H