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  <title>Qt Mobility 1.2: QMediaPlaylistSourceControl Class Reference</title>
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    <a href="index.html" class="qtref"><span>QtMobility Reference Documentation</span></a>
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<h3><a name="toc">Contents</a></h3>
<ul>
<li class="level1"><a href="#public-functions">Public Functions</a></li>
<li class="level1"><a href="#signals">Signals</a></li>
<li class="level1"><a href="#protected-functions">Protected Functions</a></li>
<li class="level1"><a href="#macros">Macros</a></li>
<li class="level1"><a href="#details">Detailed Description</a></li>
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<h1 class="title">QMediaPlaylistSourceControl Class Reference</h1>
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<p>The QMediaPlaylistSourceControl class provides access to the playlist playback functionality of a <a href="qmediaservice.html">QMediaService</a>. <a href="#details">More...</a></p>
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<pre class="cpp"> <span class="preprocessor">#include &lt;QMediaPlaylistSourceControl&gt;</span></pre><p><b>Inherits: </b><a href="qmediacontrol.html">QMediaControl</a>.</p>
<p>This class was introduced in Qt Mobility 1.0.</p>
<ul>
<li><a href="qmediaplaylistsourcecontrol-members.html">List of all members, including inherited members</a></li>
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<a name="public-functions"></a>
<h2>Public Functions</h2>
<table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> virtual </td><td class="memItemRight bottomAlign"><b><a href="qmediaplaylistsourcecontrol.html#dtor.QMediaPlaylistSourceControl">~QMediaPlaylistSourceControl</a></b> ()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual QMediaPlaylist * </td><td class="memItemRight bottomAlign"><b><a href="qmediaplaylistsourcecontrol.html#playlist">playlist</a></b> () const = 0</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qmediaplaylistsourcecontrol.html#setPlaylist">setPlaylist</a></b> ( QMediaPlaylist * <i>playlist</i> ) = 0</td></tr>
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<li class="fn">29 public functions inherited from <a href="http://qt.nokia.com/doc/4.7/qobject.html#public-functions">QObject</a></li>
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<a name="signals"></a>
<h2>Signals</h2>
<table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qmediaplaylistsourcecontrol.html#playlistChanged">playlistChanged</a></b> ( QMediaPlaylist * <i>playlist</i> )</td></tr>
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<ul>
<li class="fn">1 signal inherited from <a href="http://qt.nokia.com/doc/4.7/qobject.html#signals">QObject</a></li>
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<a name="protected-functions"></a>
<h2>Protected Functions</h2>
<table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qmediaplaylistsourcecontrol.html#QMediaPlaylistSourceControl">QMediaPlaylistSourceControl</a></b> ( QObject * <i>parent</i> = 0 )</td></tr>
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<li class="fn">7 protected functions inherited from <a href="http://qt.nokia.com/doc/4.7/qobject.html#protected-functions">QObject</a></li>
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<a name="macros"></a>
<h2>Macros</h2>
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<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qmediaplaylistsourcecontrol.html#QMediaPlaylistSourceControl_iid">QMediaPlaylistSourceControl_iid</a></b></td></tr>
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<h3>Additional Inherited Members</h3>
<ul>
<li class="fn">1 property inherited from <a href="http://qt.nokia.com/doc/4.7/qobject.html#properties">QObject</a></li>
<li class="fn">1 public slot inherited from <a href="http://qt.nokia.com/doc/4.7/qobject.html#public-slots">QObject</a></li>
<li class="fn">1 public variable inherited from <a href="http://qt.nokia.com/doc/4.7/qobject.html#public-variables">QObject</a></li>
<li class="fn">4 static public members inherited from <a href="http://qt.nokia.com/doc/4.7/qobject.html#static-public-members">QObject</a></li>
<li class="fn">2 protected variables inherited from <a href="http://qt.nokia.com/doc/4.7/qobject.html#protected-variables">QObject</a></li>
</ul>
<a name="details"></a>
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<div class="descr">
<h2>Detailed Description</h2>
<p>The QMediaPlaylistSourceControl class provides access to the playlist playback functionality of a <a href="qmediaservice.html">QMediaService</a>.</p>
<p>This control allows <a href="qmediaplaylist.html">QMediaPlaylist</a> to be passed directly to the service instead of playing media sources one by one. This control should be implemented if backend benefits from knowing the next media source to be played, for example for preloading, cross fading or gap-less playback.</p>
<p>If QMediaPlaylistSourceControl is provided, the backend must listen for current playlist item changes to load corresponding media source and advance the playlist with <a href="qmediaplaylist.html#next">QMediaPlaylist::next</a>() when playback of the current media is finished.</p>
<p>The interface name of QMediaPlaylistSourceControl is <tt>com.nokia.Qt.QMediaPlaylistSourceControl/1.0</tt> as defined in <a href="qmediaplaylistsourcecontrol.html#QMediaPlaylistSourceControl_iid">QMediaPlaylistSourceControl_iid</a>.</p>
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<p><b>See also </b><a href="qmediaservice.html#requestControl">QMediaService::requestControl</a>() and <a href="qmediaplayer.html">QMediaPlayer</a>.</p>
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<div class="func">
<h2>Member Function Documentation</h2>
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<h3 class="fn"><a name="QMediaPlaylistSourceControl"></a>QMediaPlaylistSourceControl::<span class="name">QMediaPlaylistSourceControl</span> ( <span class="type"><a href="http://qt.nokia.com/doc/4.7/qobject.html">QObject</a></span> * <i>parent</i> = 0 )<tt> [protected]</tt></h3>
<p>Create a new playlist source control object with the given <i>parent</i>.</p>
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<h3 class="fn"><a name="dtor.QMediaPlaylistSourceControl"></a>QMediaPlaylistSourceControl::<span class="name">~QMediaPlaylistSourceControl</span> ()<tt> [virtual]</tt></h3>
<p>Destroys the playlist control.</p>
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<h3 class="fn"><a name="playlist"></a><span class="type"><a href="qmediaplaylist.html">QMediaPlaylist</a></span> * QMediaPlaylistSourceControl::<span class="name">playlist</span> () const<tt> [pure virtual]</tt></h3>
<p>Returns the current playlist. Should return a null pointer if no playlist is assigned.</p>
<p>This function was introduced in Qt Mobility 1.0.</p>
<p><b>See also </b><a href="qmediaplaylistsourcecontrol.html#setPlaylist">setPlaylist</a>().</p>
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<h3 class="fn"><a name="playlistChanged"></a><span class="type">void</span> QMediaPlaylistSourceControl::<span class="name">playlistChanged</span> ( <span class="type"><a href="qmediaplaylist.html">QMediaPlaylist</a></span> * <i>playlist</i> )<tt> [signal]</tt></h3>
<p>Signal emitted when the playlist has changed to <i>playlist</i>.</p>
<p>This function was introduced in Qt Mobility 1.0.</p>
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<h3 class="fn"><a name="setPlaylist"></a><span class="type">void</span> QMediaPlaylistSourceControl::<span class="name">setPlaylist</span> ( <span class="type"><a href="qmediaplaylist.html">QMediaPlaylist</a></span> * <i>playlist</i> )<tt> [pure virtual]</tt></h3>
<p>Set the playlist of this media player to <i>playlist</i>. If a null pointer is passed, the playlist source should be disabled.</p>
<p>The current media should be replaced with the current item of the media playlist.</p>
<p>This function was introduced in Qt Mobility 1.0.</p>
<p><b>See also </b><a href="qmediaplaylistsourcecontrol.html#playlist">playlist</a>().</p>
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<div class="macros">
<h2>Macro Documentation</h2>
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<h3 class="fn"><a name="QMediaPlaylistSourceControl_iid"></a><span class="name">QMediaPlaylistSourceControl_iid</span></h3>
<p><tt>com.nokia.Qt.QMediaPlaylistSourceControl/1.0</tt></p>
<p>Defines the interface name of the <a href="qmediaplaylistsourcecontrol.html">QMediaPlaylistSourceControl</a> class.</p>
<!-- @@@QMediaPlaylistSourceControl_iid -->
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