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QMediaPlaylistControl Class Reference

The QMediaPlaylistControl class provides access to the playlist functionality of a QMediaService. More...

    #include <QMediaPlaylistControl>

This class is under development and is subject to change.

Inherits QMediaControl.

Public Functions

virtual ~QMediaPlaylistControl ()
virtual int currentIndex () const = 0
virtual void next () = 0
virtual int nextIndex ( int step ) const = 0
virtual QMediaPlaylist::PlaybackMode playbackMode () const = 0
virtual QMediaPlaylistProvider * playlistProvider () const = 0
virtual void previous () = 0
virtual int previousIndex ( int step ) const = 0
virtual void setCurrentIndex ( int position ) = 0
virtual void setPlaybackMode ( QMediaPlaylist::PlaybackMode mode ) = 0
virtual bool setPlaylistProvider ( QMediaPlaylistProvider * playlist ) = 0
  • 29 public functions inherited from QObject

Signals

void currentIndexChanged ( int position )
void currentMediaChanged ( const QMediaContent & content )
void playbackModeChanged ( QMediaPlaylist::PlaybackMode mode )
void playlistProviderChanged ()

Protected Functions

QMediaPlaylistControl ( QObject * parent = 0 )
  • 7 protected functions inherited from QObject

Macros

QMediaPlaylistControl_iid

Additional Inherited Members

  • 1 property inherited from QObject
  • 1 public slot inherited from QObject
  • 1 public type inherited from QObject
  • 4 static public members inherited from QObject
  • 2 protected variables inherited from QObject

Detailed Description

The QMediaPlaylistControl class provides access to the playlist functionality of a QMediaService.

If a QMediaService contains an internal playlist it will implement QMediaPlaylistControl. This control provides access to the contents of the playlist, as well as the position of the current media, and a means of navigating to the next and previous media.

The functionality provided by the control is exposed to application code through the QMediaPlaylist class.

The interface name of QMediaPlaylistControl is com.nokia.Qt.QMediaPlaylistControl/1.0 as defined in QMediaPlaylistControl_iid.

See also QMediaService::requestControl() and QMediaPlayer.

Member Function Documentation

QMediaPlaylistControl::QMediaPlaylistControl ( QObject * parent = 0 )   [protected]

Create a new playlist control object with the given parent.

QMediaPlaylistControl::~QMediaPlaylistControl ()   [virtual]

Destroys the playlist control.

int QMediaPlaylistControl::currentIndex () const   [pure virtual]

Returns position of the current media source in the playlist.

See also setCurrentIndex().

void QMediaPlaylistControl::currentIndexChanged ( int position )   [signal]

Signal emited when the playlist position is changed.

void QMediaPlaylistControl::currentMediaChanged ( const QMediaContent & content )   [signal]

Signal emitted when current media changes to content.

void QMediaPlaylistControl::next ()   [pure virtual]

Moves to the next item in playlist.

int QMediaPlaylistControl::nextIndex ( int step ) const   [pure virtual]

Returns the index of item, which were current after calling next() step times.

Returned value depends on the size of playlist, current position and playback mode.

See also QMediaPlaylist::playbackMode.

QMediaPlaylist::PlaybackMode QMediaPlaylistControl::playbackMode () const   [pure virtual]

Returns the playlist navigation mode.

See also setPlaybackMode() and QMediaPlaylist::PlaybackMode.

void QMediaPlaylistControl::playbackModeChanged ( QMediaPlaylist::PlaybackMode mode )   [signal]

Signal emited when the playback mode is changed.

QMediaPlaylistProvider * QMediaPlaylistControl::playlistProvider () const   [pure virtual]

Returns the playlist used by this media player.

See also setPlaylistProvider().

void QMediaPlaylistControl::playlistProviderChanged ()   [signal]

Signal emited when the playlist provider has changed.

void QMediaPlaylistControl::previous ()   [pure virtual]

Returns to the previous item in playlist.

int QMediaPlaylistControl::previousIndex ( int step ) const   [pure virtual]

Returns the index of item, which were current after calling previous() step times.

See also QMediaPlaylist::playbackMode.

void QMediaPlaylistControl::setCurrentIndex ( int position )   [pure virtual]

Jump to the item at the given position.

See also currentIndex().

void QMediaPlaylistControl::setPlaybackMode ( QMediaPlaylist::PlaybackMode mode )   [pure virtual]

Sets the playback mode.

See also playbackMode() and QMediaPlaylist::PlaybackMode.

bool QMediaPlaylistControl::setPlaylistProvider ( QMediaPlaylistProvider * playlist )   [pure virtual]

Set the playlist of this media player to playlist.

In many cases it is possible just to use the playlist constructed by player, but sometimes replacing the whole playlist allows to avoid copyting of all the items bettween playlists.

Returns true if player can use this passed playlist; otherwise returns false.

See also playlistProvider().

Macro Documentation

QMediaPlaylistControl_iid

com.nokia.Qt.QMediaPlaylistControl/1.0

Defines the interface name of the QMediaPlaylistControl class.
Cette page est une traduction d'une page de la documentation de Qt, écrite par Nokia Corporation and/or its subsidiary(-ies). Les éventuels problèmes résultant d'une mauvaise traduction ne sont pas imputables à Nokia. Qt qtmobility-1.0
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