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<td align="right" valign="top" width="230"><a href="http://www.trolltech.com"><img src="images/trolltech-logo.png" align="right" width="203" height="32" border="0" /></a></td></tr></table><h1 align="center">QDBusInterface Class Reference<br /><sup><sup>[<a href="qtdbus.html">QtDBus</a> module]</sup></sup></h1>
<p>The QDBusInterface class is a proxy for interfaces on remote objects. <a href="#details">More...</a></p>
<pre> #include <QDBusInterface></pre><p>Inherits <a href="qdbusabstractinterface.html">QDBusAbstractInterface</a>.</p>
<p>This class was introduced in Qt 4.2.</p>
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<li><a href="qdbusinterface-members.html">List of all members, including inherited members</a></li>
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<h3>Public Functions</h3>
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<li><div class="fn"/><b><a href="qdbusinterface.html#QDBusInterface-2">QDBusInterface</a></b> ( const QString & <i>service</i>, const QString & <i>path</i>, const QString & <i>interface</i> = QString(), const QDBusConnection & <i>connection</i> = QDBusConnection::sessionBus(), QObject * <i>parent</i> = 0 )</li>
<li><div class="fn"/><b><a href="qdbusinterface.html#dtor.QDBusInterface">~QDBusInterface</a></b> ()</li>
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<ul>
<li><div class="fn"/>10 public functions inherited from <a href="qdbusabstractinterface.html#public-functions">QDBusAbstractInterface</a></li>
<li><div class="fn"/>29 public functions inherited from <a href="qobject.html#public-functions">QObject</a></li>
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<h3>Additional Inherited Members</h3>
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<li><div class="fn"/>1 property inherited from <a href="qobject.html#properties">QObject</a></li>
<li><div class="fn"/>1 public slot inherited from <a href="qobject.html#public-slots">QObject</a></li>
<li><div class="fn"/>1 signal inherited from <a href="qobject.html#signals">QObject</a></li>
<li><div class="fn"/>5 static public members inherited from <a href="qobject.html#static-public-members">QObject</a></li>
<li><div class="fn"/>7 protected functions inherited from <a href="qobject.html#protected-functions">QObject</a></li>
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<h2>Detailed Description</h2>
<p>The QDBusInterface class is a proxy for interfaces on remote objects.</p>
<p>QDBusInterface is a generic accessor class that is used to place calls to remote objects, connect to signals exported by remote objects and get/set the value of remote properties. This class is useful for dynamic access to remote objects: that is, when you do not have a generated code that represents the remote interface.</p>
<p>Calls are usually placed by using the <a href="qdbusabstractinterface.html#call">call</a>() function, which constructs the message, sends it over the bus, waits for the reply and decodes the reply. Signals are connected to by using the normal <a href="qobject.html#connect">QObject::connect</a>() function. Finally, properties are accessed using the <a href="qobject.html#property">QObject::property</a>() and <a href="qobject.html#setProperty">QObject::setProperty</a>() functions.</p>
<p>The following code snippet demonstrates how to perform a mathematical operation of <tt>"2 + 2"</tt> in a remote application called <tt>com.example.Calculator</tt>, accessed via the session bus.</p>
<pre> QDBusInterface remoteApp( "com.example.Calculator", "/Calculator/Operations",
"org.mathematics.RPNCalculator" );
remoteApp.call( "PushOperand", 2 );
remoteApp.call( "PushOperand", 2 );
remoteApp.call( "ExecuteOperation", "+" );
QDBusReply<int> reply = remoteApp.call( "PopOperand" );
if ( reply.isValid() )
printf( "%d", reply.value() ); <span class="comment">// prints 4</span></pre>
<p>See also <a href="dbusxml2cpp.html">The dbusxml2cpp compiler</a>.</p>
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<h2>Member Function Documentation</h2>
<h3 class="fn"><a name="QDBusInterface-2"></a>QDBusInterface::QDBusInterface ( const <a href="qstring.html">QString</a> & <i>service</i>, const <a href="qstring.html">QString</a> & <i>path</i>, const <a href="qstring.html">QString</a> & <i>interface</i> = QString(), const <a href="qdbusconnection.html">QDBusConnection</a> & <i>connection</i> = QDBusConnection::sessionBus(), <a href="qobject.html">QObject</a> * <i>parent</i> = 0 )</h3>
<p>Creates a dynamic <a href="qdbusinterface.html">QDBusInterface</a> object associated with the interface <i>interface</i> on object at path <i>path</i> on service <i>service</i>, using the given <i>connection</i>. If <i>interface</i> is an empty string, the object created will refer to the merging of all interfaces found in that object.</p>
<p><i>parent</i> is passed to the base class constructor.</p>
<p>If the remote service <i>service</i> is not present or if an error occurs trying to obtain the description of the remote interface <i>interface</i>, the object created will not be valid (see <a href="qdbusabstractinterface.html#isValid">isValid</a>()).</p>
<h3 class="fn"><a name="dtor.QDBusInterface"></a>QDBusInterface::~QDBusInterface ()</h3>
<p>Destroy the object interface and frees up any resource used.</p>
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