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<li>Qt 5.2</li>
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<li>QGeoSatelliteInfoSource</li>
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Qt 5.2.1 Reference Documentation</li>
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<li class="level1"><a href="#public-types">Public Types</a></li>
<li class="level1"><a href="#properties">Properties</a></li>
<li class="level1"><a href="#public-functions">Public Functions</a></li>
<li class="level1"><a href="#public-slots">Public Slots</a></li>
<li class="level1"><a href="#signals">Signals</a></li>
<li class="level1"><a href="#static-public-members">Static Public Members</a></li>
<li class="level1"><a href="#details">Detailed Description</a></li>
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<h1 class="title">QGeoSatelliteInfoSource Class</h1>
<!-- $$$QGeoSatelliteInfoSource-brief -->
<p>The QGeoSatelliteInfoSource class is an abstract base class for the distribution of satellite information updates. <a href="#details">More...</a></p>
<!-- @@@QGeoSatelliteInfoSource -->
<table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> Header:</td><td class="memItemRight bottomAlign"> </b><tt><span class="preprocessor">#include <QGeoSatelliteInfoSource></span>
</tt></td></tr><tr><td class="memItemLeft rightAlign topAlign"> qmake:</td><td class="memItemRight bottomAlign"> <tt>QT += positioning</tt></td></tr><tr><td class="memItemLeft rightAlign topAlign"> Since:</td><td class="memItemRight bottomAlign"> Qt 5.2</td></tr></table><ul>
<li><a href="qgeosatelliteinfosource-members.html">List of all members, including inherited members</a></li>
</ul>
<a name="public-types"></a>
<h2>Public Types</h2>
<table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> enum </td><td class="memItemRight bottomAlign"><b><a href="qgeosatelliteinfosource.html#Error-enum">Error</a></b> { AccessError, ClosedError, NoError, UnknownSourceError }</td></tr>
</table>
<a name="properties"></a>
<h2>Properties</h2>
<ul>
<li class="fn"><b><a href="qgeosatelliteinfosource.html#minimumUpdateInterval-prop">minimumUpdateInterval</a></b> : const int</li>
<li class="fn"><b><a href="qgeosatelliteinfosource.html#updateInterval-prop">updateInterval</a></b> : int</li>
</ul>
<a name="public-functions"></a>
<h2>Public Functions</h2>
<table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qgeosatelliteinfosource.html#QGeoSatelliteInfoSource">QGeoSatelliteInfoSource</a></b>(QObject *<i> parent</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual </td><td class="memItemRight bottomAlign"><b><a href="qgeosatelliteinfosource.html#dtor.QGeoSatelliteInfoSource">~QGeoSatelliteInfoSource</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual Error </td><td class="memItemRight bottomAlign"><b><a href="qgeosatelliteinfosource.html#error">error</a></b>() const = 0</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual int </td><td class="memItemRight bottomAlign"><b><a href="qgeosatelliteinfosource.html#minimumUpdateInterval-prop">minimumUpdateInterval</a></b>() const = 0</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qgeosatelliteinfosource.html#updateInterval-prop">setUpdateInterval</a></b>(int<i> msec</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QString </td><td class="memItemRight bottomAlign"><b><a href="qgeosatelliteinfosource.html#sourceName">sourceName</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> int </td><td class="memItemRight bottomAlign"><b><a href="qgeosatelliteinfosource.html#updateInterval-prop">updateInterval</a></b>() const</td></tr>
</table>
<a name="public-slots"></a>
<h2>Public Slots</h2>
<table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qgeosatelliteinfosource.html#requestUpdate">requestUpdate</a></b>(int<i> timeout</i> = 0) = 0</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qgeosatelliteinfosource.html#startUpdates">startUpdates</a></b>() = 0</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qgeosatelliteinfosource.html#stopUpdates">stopUpdates</a></b>() = 0</td></tr>
</table>
<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="qgeosatelliteinfosource.html#error-2">error</a></b>(QGeoSatelliteInfoSource::Error<i> satelliteError</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qgeosatelliteinfosource.html#requestTimeout">requestTimeout</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qgeosatelliteinfosource.html#satellitesInUseUpdated">satellitesInUseUpdated</a></b>(const QList<QGeoSatelliteInfo> &<i> satellites</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qgeosatelliteinfosource.html#satellitesInViewUpdated">satellitesInViewUpdated</a></b>(const QList<QGeoSatelliteInfo> &<i> satellites</i>)</td></tr>
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<a name="static-public-members"></a>
<h2>Static Public Members</h2>
<table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> QStringList </td><td class="memItemRight bottomAlign"><b><a href="qgeosatelliteinfosource.html#availableSources">availableSources</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QGeoSatelliteInfoSource * </td><td class="memItemRight bottomAlign"><b><a href="qgeosatelliteinfosource.html#createDefaultSource">createDefaultSource</a></b>(QObject *<i> parent</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QGeoSatelliteInfoSource * </td><td class="memItemRight bottomAlign"><b><a href="qgeosatelliteinfosource.html#createSource">createSource</a></b>(const QString &<i> sourceName</i>, QObject *<i> parent</i>)</td></tr>
</table>
<a name="details"></a>
<!-- $$$QGeoSatelliteInfoSource-description -->
<div class="descr">
<h2>Detailed Description</h2>
<p>The QGeoSatelliteInfoSource class is an abstract base class for the distribution of satellite information updates.</p>
<p>The static function <a href="qgeosatelliteinfosource.html#createDefaultSource">QGeoSatelliteInfoSource::createDefaultSource</a>() creates a default satellite data source that is appropriate for the platform, if one is available. Otherwise, available <a href="qgeopositioninfosourcefactory.html">QGeoPositionInfoSourceFactory</a> plugins will be checked for one that has a satellite data source available.</p>
<p>Call <a href="qgeosatelliteinfosource.html#startUpdates">startUpdates</a>() and <a href="qgeosatelliteinfosource.html#stopUpdates">stopUpdates</a>() to start and stop regular updates, or <a href="qgeosatelliteinfosource.html#requestUpdate">requestUpdate</a>() to request a single update. When an update is available, <a href="qgeosatelliteinfosource.html#satellitesInViewUpdated">satellitesInViewUpdated</a>() and/or <a href="qgeosatelliteinfosource.html#satellitesInUseUpdated">satellitesInUseUpdated</a>() will be emitted.</p>
<p>If regular satellite updates are required, <a href="qgeosatelliteinfosource.html#updateInterval-prop">setUpdateInterval</a>() can be used to specify how often these updates should be emitted. If no interval is specified, updates are simply provided whenever they are available. For example:</p>
<pre class="cpp"><span class="comment">// Emit updates every 10 seconds if available</span>
<span class="type">QGeoSatelliteInfoSource</span> <span class="operator">*</span>source <span class="operator">=</span> <span class="type">QGeoSatelliteInfoSource</span><span class="operator">::</span><a href="qgeosatelliteinfosource.html#createDefaultSource">createDefaultSource</a>(<span class="number">0</span>);
<span class="keyword">if</span> (source)
source<span class="operator">-</span><span class="operator">></span><a href="qgeosatelliteinfosource.html#updateInterval-prop">setUpdateInterval</a>(<span class="number">10000</span>);</pre>
<p>To remove an update interval that was previously set, call <a href="qgeosatelliteinfosource.html#updateInterval-prop">setUpdateInterval</a>() with a value of 0.</p>
<p>Note that the satellite source may have a minimum value requirement for update intervals, as returned by <a href="qgeosatelliteinfosource.html#minimumUpdateInterval-prop">minimumUpdateInterval</a>().</p>
<p><b>Warning:</b> On Windows CE it is not possible to detect if a device is GPS enabled. The default satellite source on a Windows CE device without GPS support will never provide any satellite data.</p>
</div>
<!-- @@@QGeoSatelliteInfoSource -->
<div class="types">
<h2>Member Type Documentation</h2>
<!-- $$$Error$$$AccessError$$$ClosedError$$$NoError$$$UnknownSourceError -->
<h3 class="fn"><a name="Error-enum"></a>enum QGeoSatelliteInfoSource::<span class="name">Error</span></h3>
<p>The Error enumeration represents the errors which can occur.</p>
<table class="valuelist"><tr valign="top" class="odd"><th class="tblConst">Constant</th><th class="tblval">Value</th><th class="tbldscr">Description</th></tr>
<tr><td class="topAlign"><tt>QGeoSatelliteInfoSource::AccessError</tt></td><td class="topAlign"><tt>0</tt></td><td class="topAlign">The connection setup to the satellite backend failed because the application lacked the required privileges.</td></tr>
<tr><td class="topAlign"><tt>QGeoSatelliteInfoSource::ClosedError</tt></td><td class="topAlign"><tt>1</tt></td><td class="topAlign">The satellite backend closed the connection, which happens for example in case the user is switching location services to off. This object becomes invalid and should be deleted. A new satellite source can be created by calling <a href="qgeosatelliteinfosource.html#createDefaultSource">createDefaultSource</a>() later on.</td></tr>
<tr><td class="topAlign"><tt>QGeoSatelliteInfoSource::NoError</tt></td><td class="topAlign"><tt>2</tt></td><td class="topAlign">No error has occurred.</td></tr>
<tr><td class="topAlign"><tt>QGeoSatelliteInfoSource::UnknownSourceError</tt></td><td class="topAlign"><tt>-1</tt></td><td class="topAlign">An unidentified error occurred.</td></tr>
</table>
<!-- @@@Error -->
</div>
<div class="prop">
<h2>Property Documentation</h2>
<!-- $$$minimumUpdateInterval-prop$$$minimumUpdateInterval -->
<h3 class="fn"><a name="minimumUpdateInterval-prop"></a><span class="name">minimumUpdateInterval</span> : const <span class="type">int</span></h3>
<p>This property holds this property holds the minimum time (in milliseconds) required to retrieve a satellite update.</p>
<p>This is the minimum value accepted by <a href="qgeosatelliteinfosource.html#updateInterval-prop">setUpdateInterval</a>() and <a href="qgeosatelliteinfosource.html#requestUpdate">requestUpdate</a>().</p>
<p><b>Access functions:</b></p>
<table class="alignedsummary">
<tr><td class="memItemLeft topAlign rightAlign"> virtual int </td><td class="memItemRight bottomAlign"><span class="name"><b>minimumUpdateInterval</b></span>() const = 0</td></tr>
</table>
<!-- @@@minimumUpdateInterval -->
<!-- $$$updateInterval-prop$$$updateInterval$$$setUpdateIntervalint -->
<h3 class="fn"><a name="updateInterval-prop"></a><span class="name">updateInterval</span> : <span class="type">int</span></h3>
<p>This property holds this property holds the requested interval in milliseconds between each update.</p>
<p>If the update interval is not set (or is set to 0) the source will provide updates as often as necessary.</p>
<p>If the update interval is set, the source will provide updates at an interval as close to the requested interval as possible. If the requested interval is less than the <a href="qgeosatelliteinfosource.html#minimumUpdateInterval-prop">minimumUpdateInterval</a>(), the minimum interval is used instead.</p>
<p>Changes to the update interval will happen as soon as is practical, however the time the change takes may vary between implementations. Whether or not the elapsed time from the previous interval is counted as part of the new interval is also implementation dependent.</p>
<p>The default value for this property is 0.</p>
<p>Note: Subclass implementations must call the base implementation of setUpdateInterval() so that updateInterval() returns the correct value.</p>
<p><b>Access functions:</b></p>
<table class="alignedsummary">
<tr><td class="memItemLeft topAlign rightAlign"> int </td><td class="memItemRight bottomAlign"><span class="name"><b>updateInterval</b></span>() const</td></tr>
<tr><td class="memItemLeft topAlign rightAlign"> virtual void </td><td class="memItemRight bottomAlign"><span class="name"><b>setUpdateInterval</b></span>(int<i> msec</i>)</td></tr>
</table>
<!-- @@@updateInterval -->
</div>
<div class="func">
<h2>Member Function Documentation</h2>
<!-- $$$QGeoSatelliteInfoSource[overload1]$$$QGeoSatelliteInfoSourceQObject* -->
<h3 class="fn"><a name="QGeoSatelliteInfoSource"></a>QGeoSatelliteInfoSource::<span class="name">QGeoSatelliteInfoSource</span>(<span class="type">QObject</span> *<i> parent</i>)</h3>
<p>Creates a satellite source with the specified <i>parent</i>.</p>
<!-- @@@QGeoSatelliteInfoSource -->
<!-- $$$~QGeoSatelliteInfoSource[overload1]$$$~QGeoSatelliteInfoSource -->
<h3 class="fn"><a name="dtor.QGeoSatelliteInfoSource"></a>QGeoSatelliteInfoSource::<span class="name">~QGeoSatelliteInfoSource</span>()<tt> [virtual]</tt></h3>
<p>Destroys the satellite source.</p>
<!-- @@@~QGeoSatelliteInfoSource -->
<!-- $$$availableSources[overload1]$$$availableSources -->
<h3 class="fn"><a name="availableSources"></a><span class="type">QStringList</span> QGeoSatelliteInfoSource::<span class="name">availableSources</span>()<tt> [static]</tt></h3>
<p>Returns a list of available source plugins, including the default system backend if one is available.</p>
<!-- @@@availableSources -->
<!-- $$$createDefaultSource[overload1]$$$createDefaultSourceQObject* -->
<h3 class="fn"><a name="createDefaultSource"></a><span class="type">QGeoSatelliteInfoSource</span> * QGeoSatelliteInfoSource::<span class="name">createDefaultSource</span>(<span class="type">QObject</span> *<i> parent</i>)<tt> [static]</tt></h3>
<p>Creates and returns a source with the specified <i>parent</i> that reads from the system's default source of satellite update information, or the highest priority available plugin.</p>
<p>Returns 0 if the system has no default satellite source, no valid plugins could be found or the user does not have the permission to access the satellite data.</p>
<!-- @@@createDefaultSource -->
<!-- $$$createSource[overload1]$$$createSourceconstQString&QObject* -->
<h3 class="fn"><a name="createSource"></a><span class="type">QGeoSatelliteInfoSource</span> * QGeoSatelliteInfoSource::<span class="name">createSource</span>(const <span class="type">QString</span> &<i> sourceName</i>, <span class="type">QObject</span> *<i> parent</i>)<tt> [static]</tt></h3>
<p>Creates and returns a source with the given <i>parent</i>, by loading the plugin named <i>sourceName</i>.</p>
<p>Returns 0 if the plugin cannot be found.</p>
<!-- @@@createSource -->
<!-- $$$error[overload1]$$$error -->
<h3 class="fn"><a name="error"></a><span class="type"><a href="qgeosatelliteinfosource.html#Error-enum">Error</a></span> QGeoSatelliteInfoSource::<span class="name">error</span>() const<tt> [pure virtual]</tt></h3>
<p>Returns the last error that occurred.</p>
<p>This signal is not emitted when a <a href="qgeosatelliteinfosource.html#requestTimeout">requestTimeout</a>() has occurred.</p>
<!-- @@@error -->
<!-- $$$error$$$errorQGeoSatelliteInfoSource::Error -->
<h3 class="fn"><a name="error-2"></a><span class="type">void</span> QGeoSatelliteInfoSource::<span class="name">error</span>(<span class="type"><a href="qgeosatelliteinfosource.html#Error-enum">QGeoSatelliteInfoSource::Error</a></span><i> satelliteError</i>)<tt> [signal]</tt></h3>
<p>This signal is emitted after an error occurred. The <i>satelliteError</i> parameter describes the type of error that occurred.</p>
<!-- @@@error -->
<!-- $$$requestTimeout[overload1]$$$requestTimeout -->
<h3 class="fn"><a name="requestTimeout"></a><span class="type">void</span> QGeoSatelliteInfoSource::<span class="name">requestTimeout</span>()<tt> [signal]</tt></h3>
<p>Emitted if <a href="qgeosatelliteinfosource.html#requestUpdate">requestUpdate</a>() was called and the current satellite information could not be retrieved within the specified timeout.</p>
<p>While the triggering of this signal may be considered an error condition, it does not imply the emission of the <tt>error()</tt> signal. Only the emission of <tt>requestTimeout()</tt> is required to indicate a timeout.</p>
<!-- @@@requestTimeout -->
<!-- $$$requestUpdate[overload1]$$$requestUpdateint -->
<h3 class="fn"><a name="requestUpdate"></a><span class="type">void</span> QGeoSatelliteInfoSource::<span class="name">requestUpdate</span>(<span class="type">int</span><i> timeout</i> = 0)<tt> [pure virtual slot]</tt></h3>
<p>Attempts to get the current satellite information and emit <a href="qgeosatelliteinfosource.html#satellitesInViewUpdated">satellitesInViewUpdated</a>() and <a href="qgeosatelliteinfosource.html#satellitesInUseUpdated">satellitesInUseUpdated</a>() with this information. If the current satellite information cannot be found within the given <i>timeout</i> (in milliseconds) or if <i>timeout</i> is less than the value returned by <a href="qgeosatelliteinfosource.html#minimumUpdateInterval-prop">minimumUpdateInterval</a>(), <a href="qgeosatelliteinfosource.html#requestTimeout">requestTimeout</a>() is emitted.</p>
<p>If the timeout is zero, the timeout defaults to a reasonable timeout period as appropriate for the source.</p>
<p>This does nothing if another update request is in progress. However it can be called even if <a href="qgeosatelliteinfosource.html#startUpdates">startUpdates</a>() has already been called and regular updates are in progress.</p>
<!-- @@@requestUpdate -->
<!-- $$$satellitesInUseUpdated[overload1]$$$satellitesInUseUpdatedconstQList<QGeoSatelliteInfo>& -->
<h3 class="fn"><a name="satellitesInUseUpdated"></a><span class="type">void</span> QGeoSatelliteInfoSource::<span class="name">satellitesInUseUpdated</span>(const <span class="type">QList</span><<span class="type"><a href="qgeosatelliteinfo.html">QGeoSatelliteInfo</a></span>> &<i> satellites</i>)<tt> [signal]</tt></h3>
<p>If <a href="qgeosatelliteinfosource.html#startUpdates">startUpdates</a>() or <a href="qgeosatelliteinfosource.html#requestUpdate">requestUpdate</a>() is called, this signal is emitted when an update is available on the number of satellites that are currently in use.</p>
<p>These are the satellites that are used to get a "fix" - that is, those used to determine the current position.</p>
<p>The <i>satellites</i> parameter holds the satellites currently in use.</p>
<!-- @@@satellitesInUseUpdated -->
<!-- $$$satellitesInViewUpdated[overload1]$$$satellitesInViewUpdatedconstQList<QGeoSatelliteInfo>& -->
<h3 class="fn"><a name="satellitesInViewUpdated"></a><span class="type">void</span> QGeoSatelliteInfoSource::<span class="name">satellitesInViewUpdated</span>(const <span class="type">QList</span><<span class="type"><a href="qgeosatelliteinfo.html">QGeoSatelliteInfo</a></span>> &<i> satellites</i>)<tt> [signal]</tt></h3>
<p>If <a href="qgeosatelliteinfosource.html#startUpdates">startUpdates</a>() or <a href="qgeosatelliteinfosource.html#requestUpdate">requestUpdate</a>() is called, this signal is emitted when an update is available on the satellites that are currently in view.</p>
<p>The <i>satellites</i> parameter holds the satellites currently in view.</p>
<!-- @@@satellitesInViewUpdated -->
<!-- $$$sourceName[overload1]$$$sourceName -->
<h3 class="fn"><a name="sourceName"></a><span class="type">QString</span> QGeoSatelliteInfoSource::<span class="name">sourceName</span>() const</h3>
<p>Returns the unique name of the satellite source implementation in use.</p>
<p>This is the same name that can be passed to <a href="qgeosatelliteinfosource.html#createSource">createSource</a>() in order to create a new instance of a particular satellite source implementation.</p>
<!-- @@@sourceName -->
<!-- $$$startUpdates[overload1]$$$startUpdates -->
<h3 class="fn"><a name="startUpdates"></a><span class="type">void</span> QGeoSatelliteInfoSource::<span class="name">startUpdates</span>()<tt> [pure virtual slot]</tt></h3>
<p>Starts emitting updates at regular intervals. The updates will be provided whenever new satellite information becomes available.</p>
<p>If satellite information cannot be retrieved or some other form of timeout has occurred the <a href="qgeosatelliteinfosource.html#satellitesInViewUpdated">satellitesInViewUpdated</a>() and <a href="qgeosatelliteinfosource.html#satellitesInUseUpdated">satellitesInUseUpdated</a>() signals may be emitted with empty parameter lists.</p>
<p><b>See also </b><a href="qgeosatelliteinfosource.html#satellitesInViewUpdated">satellitesInViewUpdated</a>() and <a href="qgeosatelliteinfosource.html#satellitesInUseUpdated">satellitesInUseUpdated</a>().</p>
<!-- @@@startUpdates -->
<!-- $$$stopUpdates[overload1]$$$stopUpdates -->
<h3 class="fn"><a name="stopUpdates"></a><span class="type">void</span> QGeoSatelliteInfoSource::<span class="name">stopUpdates</span>()<tt> [pure virtual slot]</tt></h3>
<p>Stops emitting updates at regular intervals.</p>
<!-- @@@stopUpdates -->
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<acronym title="Copyright">©</acronym> 2013 Digia Plc and/or its
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their respective owners.<br> The documentation provided herein is licensed under the terms of the <a href="http://www.gnu.org/licenses/fdl.html">GNU Free Documentation License version 1.3</a> as published by the Free Software Foundation.<br> Digia, Qt and their respective logos are trademarks of Digia Plc in Finland and/or other countries worldwide. All other trademarks are property
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