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<td width="1"> </td><td class="postheader" valign="center"><a href="index.html"><font color="#004faf">Home</font></a> · <a href="classes.html"><font color="#004faf">All Classes</font></a> · <a href="functions.html"><font color="#004faf">All Functions</font></a> · <a href="overviews.html"><font color="#004faf">Overviews</font></a></td></tr></table><h1 class="title">QDBusVariant Class Reference<br /><span class="small-subtitle">[<a href="qtdbus.html">QtDBus</a> module]</span>
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<p>The QDBusVariant class enables the programmer to identify the variant type provided by the D-Bus typesystem. <a href="#details">More...</a></p>
<pre> #include <QDBusVariant></pre><p>Inherits <a href="qvariant.html">QVariant</a> (private).</p>
<p>This class was introduced in Qt 4.2.</p>
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<li><a href="qdbusvariant-members.html">List of all members, including inherited members</a></li>
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<h2>Public Functions</h2>
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<tr><td class="memItemLeft" align="right" valign="top"></td><td class="memItemRight" valign="bottom"><b><a href="qdbusvariant.html#QDBusVariant">QDBusVariant</a></b> ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"></td><td class="memItemRight" valign="bottom"><b><a href="qdbusvariant.html#QDBusVariant-2">QDBusVariant</a></b> ( const QVariant & <i>variant</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><b><a href="qdbusvariant.html#setVariant">setVariant</a></b> ( const QVariant & <i>variant</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">QVariant </td><td class="memItemRight" valign="bottom"><b><a href="qdbusvariant.html#variant">variant</a></b> () const</td></tr>
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<li><div bar="2" class="fn"></div>44 public functions inherited from <a href="qvariant.html#public-functions">QVariant</a></li>
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<h3>Additional Inherited Members</h3>
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<li><div class="fn"></div>3 static public members inherited from <a href="qvariant.html#static-public-members">QVariant</a></li>
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<h2>Detailed Description</h2>
<p>The QDBusVariant class enables the programmer to identify the variant type provided by the D-Bus typesystem.</p>
<p>A D-Bus function that takes an integer, a D-Bus variant and a string as parameters can be called with the following argument list (see <a href="qdbusmessage.html#setArguments">QDBusMessage::setArguments</a>()):</p>
<pre> QList<QVariant> arguments;
arguments << QVariant(42) << QVariant::fromValue(QDBusVariant(43)) << QVariant("hello");
myDBusMessage.setArguments(arguments);</pre>
<p>When a D-Bus function returns a D-Bus variant, it can be retrieved as follows:</p>
<pre> <span class="comment">// call a D-Bus function that returns a D-Bus variant</span>
QVariant v = callMyDBusFunction();
<span class="comment">// retrieve the D-Bus variant</span>
QDBusVariant dbusVariant = qvariant_cast<QDBusVariant>(v);
<span class="comment">// retrieve the actual value stored in the D-Bus variant</span>
QVariant result = dbusVariant.variant();</pre>
<p>The <a href="qvariant.html">QVariant</a> within a QDBusVariant is required to distinguish between a normal D-Bus value and a value within a D-Bus variant.</p>
<p>See also <a href="qdbustypesystem.html">The QtDBus type system</a>.</p>
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<h2>Member Function Documentation</h2>
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<h3 class="fn"><a name="QDBusVariant"></a>QDBusVariant::QDBusVariant ()</h3>
<p>Constructs a new D-Bus variant.</p>
<h3 class="fn"><a name="QDBusVariant-2"></a>QDBusVariant::QDBusVariant ( const <a href="qvariant.html">QVariant</a> & <i>variant</i> )</h3>
<p>Constructs a new D-Bus variant from the given Qt <i>variant</i>.</p>
<p>See also <a href="qdbusvariant.html#setVariant">setVariant</a>().</p>
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<h3 class="fn"><a name="setVariant"></a>void QDBusVariant::setVariant ( const <a href="qvariant.html">QVariant</a> & <i>variant</i> )</h3>
<p>Assigns the value of the given Qt <i>variant</i> to this D-Bus variant.</p>
<p>See also <a href="qdbusvariant.html#variant">variant</a>().</p>
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<h3 class="fn"><a name="variant"></a><a href="qvariant.html">QVariant</a> QDBusVariant::variant () const</h3>
<p>Returns this D-Bus variant as a <a href="qvariant.html">QVariant</a> object.</p>
<p>See also <a href="qdbusvariant.html#setVariant">setVariant</a>().</p>
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