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  <title>Qt Mobility 1.2: QGeoPositionInfoSourceFactory 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>
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<li class="level1"><a href="#public-functions">Public Functions</a></li>
<li class="level1"><a href="#details">Detailed Description</a></li>
<li class="level2"><a href="#default-plugins">Default plugins</a></li>
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<h1 class="title">QGeoPositionInfoSourceFactory Class Reference</h1>
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<p>The QGeoPositionInfoSourceFactory class is a factory class used as the plugin interface for external providers of positioning data. <a href="#details">More...</a></p>
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<pre class="cpp"> <span class="preprocessor">#include &lt;QGeoPositionInfoSourceFactory&gt;</span></pre><p>This class was introduced in Qt Mobility 1.2.</p>
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<li><a href="qgeopositioninfosourcefactory-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="qgeopositioninfosourcefactory.html#dtor.QGeoPositionInfoSourceFactory">~QGeoPositionInfoSourceFactory</a></b> ()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual QGeoPositionInfoSource * </td><td class="memItemRight bottomAlign"><b><a href="qgeopositioninfosourcefactory.html#positionInfoSource">positionInfoSource</a></b> ( QObject * <i>parent</i> ) = 0</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual QGeoSatelliteInfoSource * </td><td class="memItemRight bottomAlign"><b><a href="qgeopositioninfosourcefactory.html#satelliteInfoSource">satelliteInfoSource</a></b> ( QObject * <i>parent</i> ) = 0</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual QString </td><td class="memItemRight bottomAlign"><b><a href="qgeopositioninfosourcefactory.html#sourceName">sourceName</a></b> () const = 0</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual int </td><td class="memItemRight bottomAlign"><b><a href="qgeopositioninfosourcefactory.html#sourcePriority">sourcePriority</a></b> () const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual int </td><td class="memItemRight bottomAlign"><b><a href="qgeopositioninfosourcefactory.html#sourceVersion">sourceVersion</a></b> () const = 0</td></tr>
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<h2>Detailed Description</h2>
<p>The QGeoPositionInfoSourceFactory class is a factory class used as the plugin interface for external providers of positioning data.</p>
<p>Implementers must provide a unique combination of <a href="qgeopositioninfosourcefactory.html#sourceName">sourceName</a>() and <a href="qgeopositioninfosourcefactory.html#sourceVersion">sourceVersion</a>() per plugin.</p>
<p>The other functions must be overridden by all plugins, other than <a href="qgeopositioninfosourcefactory.html#sourcePriority">sourcePriority</a>() which defaults to returning 0. Higher values of priority will be preferred to lower ones.</p>
<a name="default-plugins"></a>
<h3>Default plugins</h3>
<p>Normally, the platform default position source will always overrule any plugin-based position source during a call to createDefaultSource(). However, a limited measure is available where needed to change this behaviour, using a system-wide configuration file.</p>
<p>The configuration file is in the system's default <a href="http://qt.nokia.com/doc/4.7/qsettings.html">QSettings</a> format, under <tt>Nokia/QtLocationPosAndSat</tt> (for example, on most Linux variants this is <tt>/etc/xdg/Nokia/QtLocationPosAndSat.conf</tt>). To set a default plugin source, set the value <tt>position.plugin.operator.whitelist</tt> to a string of the format <tt>&quot;name,filename,hash,size&quot;</tt> where <i>name</i> is the same as returned by the plugin's <tt>sourceName()</tt> function, <i>size</i> is the size of the shared library and <i>hash</i> is the library's SHA1 hash in hex format.</p>
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<h2>Member Function Documentation</h2>
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<h3 class="fn"><a name="dtor.QGeoPositionInfoSourceFactory"></a>QGeoPositionInfoSourceFactory::<span class="name">~QGeoPositionInfoSourceFactory</span> ()<tt> [virtual]</tt></h3>
<p>Destroys the position info source factory.</p>
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<h3 class="fn"><a name="positionInfoSource"></a><span class="type"><a href="qgeopositioninfosource.html">QGeoPositionInfoSource</a></span> * QGeoPositionInfoSourceFactory::<span class="name">positionInfoSource</span> ( <span class="type"><a href="http://qt.nokia.com/doc/4.7/qobject.html">QObject</a></span> * <i>parent</i> )<tt> [pure virtual]</tt></h3>
<p>Returns a new <a href="qgeopositioninfosource.html">QGeoPositionInfoSource</a> associated with this plugin with parent <i>parent</i> . Can also return 0, in which case the factory with the next highest priority will be used instead.</p>
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<h3 class="fn"><a name="satelliteInfoSource"></a><span class="type"><a href="qgeosatelliteinfosource.html">QGeoSatelliteInfoSource</a></span> * QGeoPositionInfoSourceFactory::<span class="name">satelliteInfoSource</span> ( <span class="type"><a href="http://qt.nokia.com/doc/4.7/qobject.html">QObject</a></span> * <i>parent</i> )<tt> [pure virtual]</tt></h3>
<p>Returns a new <a href="qgeosatelliteinfosource.html">QGeoSatelliteInfoSource</a> associated with this plugin with parent <i>parent</i>. Can also return 0, in which case the factory with the next highest priority will be used instead.</p>
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<h3 class="fn"><a name="sourceName"></a><span class="type"><a href="http://qt.nokia.com/doc/4.7/qstring.html">QString</a></span> QGeoPositionInfoSourceFactory::<span class="name">sourceName</span> () const<tt> [pure virtual]</tt></h3>
<p>Returns the string used to identify the position provider behind this implementation.</p>
<p>The combination of sourceName() and <a href="qgeopositioninfosourcefactory.html#sourceVersion">sourceVersion</a>() should be unique amongst the plugins.</p>
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<h3 class="fn"><a name="sourcePriority"></a><span class="type">int</span> QGeoPositionInfoSourceFactory::<span class="name">sourcePriority</span> () const<tt> [virtual]</tt></h3>
<p>Returns the priority of this factory in the list of available factories. Factories with higher values of priority will be preferred to those with lower values.</p>
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<h3 class="fn"><a name="sourceVersion"></a><span class="type">int</span> QGeoPositionInfoSourceFactory::<span class="name">sourceVersion</span> () const<tt> [pure virtual]</tt></h3>
<p>Returns the version of the plugin.</p>
<p>The combination of <a href="qgeopositioninfosourcefactory.html#sourceName">sourceName</a>() and sourceVersion() should be unique amongst the plugins.</p>
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