Sophie

Sophie

distrib > Mageia > 6 > armv5tl > media > core-updates > by-pkgid > 768f7d9f703884aa2562bf0a651086df > files > 957

qtbase5-doc-5.9.4-1.1.mga6.noarch.rpm

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html>
<html lang="en">
<head>
  <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<!-- qdbusextratypes.cpp -->
  <title>QDBusVariant Class | Qt D-Bus</title>
  <link rel="stylesheet" type="text/css" href="style/offline-simple.css" />
  <script type="text/javascript">
    document.getElementsByTagName("link").item(0).setAttribute("href", "style/offline.css");
    // loading style sheet breaks anchors that were jumped to before
    // so force jumping to anchor again
    setTimeout(function() {
        var anchor = location.hash;
        // need to jump to different anchor first (e.g. none)
        location.hash = "#";
        setTimeout(function() {
            location.hash = anchor;
        }, 0);
    }, 0);
  </script>
</head>
<body>
<div class="header" id="qtdocheader">
  <div class="main">
    <div class="main-rounded">
      <div class="navigationbar">
        <table><tr>
<td >Qt 5.9</td><td ><a href="qtdbus-index.html">Qt D-Bus</a></td><td ><a href="qtdbus-module.html">C++ Classes</a></td><td >QDBusVariant</td></tr></table><table class="buildversion"><tr>
<td id="buildversion" width="100%" align="right">Qt 5.9.4 Reference Documentation</td>
        </tr></table>
      </div>
    </div>
<div class="content">
<div class="line">
<div class="content mainContent">
<div class="sidebar">
<div class="toc">
<h3><a name="toc">Contents</a></h3>
<ul>
<li class="level1"><a href="#public-functions">Public Functions</a></li>
<li class="level1"><a href="#details">Detailed Description</a></li>
</ul>
</div>
<div class="sidebar-content" id="sidebar-content"></div></div>
<h1 class="title">QDBusVariant Class</h1>
<!-- $$$QDBusVariant-brief -->
<p>The <a href="qdbusvariant.html">QDBusVariant</a> class enables the programmer to identify the variant type provided by the D-Bus typesystem. <a href="#details">More...</a></p>
<!-- @@@QDBusVariant -->
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> Header:</td><td class="memItemRight bottomAlign">   <span class="preprocessor">#include &lt;QDBusVariant&gt;</span>
</td></tr><tr><td class="memItemLeft rightAlign topAlign"> qmake:</td><td class="memItemRight bottomAlign"> QT += dbus</td></tr><tr><td class="memItemLeft rightAlign topAlign"> Since:</td><td class="memItemRight bottomAlign">  Qt 4.2</td></tr></table></div><ul>
<li><a href="qdbusvariant-members.html">List of all members, including inherited members</a></li>
</ul>
<a name="public-functions"></a>
<h2 id="public-functions">Public Functions</h2>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qdbusvariant.html#QDBusVariant">QDBusVariant</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qdbusvariant.html#QDBusVariant-1">QDBusVariant</a></b>(const QVariant &amp;<i>variant</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qdbusvariant.html#QDBusVariant-2">QDBusVariant</a></b>(QVariant &amp;&amp;<i>v</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qdbusvariant.html#setVariant">setVariant</a></b>(const QVariant &amp;<i>variant</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qdbusvariant.html#swap">swap</a></b>(QDBusVariant &amp;<i>other</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QVariant </td><td class="memItemRight bottomAlign"><b><a href="qdbusvariant.html#variant">variant</a></b>() const</td></tr>
</table></div>
<a name="details"></a>
<!-- $$$QDBusVariant-description -->
<div class="descr">
<h2 id="details">Detailed Description</h2>
<p>The <a href="qdbusvariant.html">QDBusVariant</a> 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 class="cpp">

      <span class="type"><a href="../qtcore/qlist.html">QList</a></span><span class="operator">&lt;</span><span class="type"><a href="../qtcore/qvariant.html">QVariant</a></span><span class="operator">&gt;</span> arguments;
      arguments <span class="operator">&lt;</span><span class="operator">&lt;</span> <span class="type"><a href="../qtcore/qvariant.html">QVariant</a></span>(<span class="number">42</span>) <span class="operator">&lt;</span><span class="operator">&lt;</span> <span class="type"><a href="../qtcore/qvariant.html">QVariant</a></span><span class="operator">::</span>fromValue(<span class="type"><a href="qdbusvariant.html#QDBusVariant">QDBusVariant</a></span>(<span class="number">43</span>)) <span class="operator">&lt;</span><span class="operator">&lt;</span> <span class="type"><a href="../qtcore/qvariant.html">QVariant</a></span>(<span class="string">&quot;hello&quot;</span>);
      myDBusMessage<span class="operator">.</span>setArguments(arguments);

</pre>
<p>When a D-Bus function returns a D-Bus variant, it can be retrieved as follows:</p>
<pre class="cpp">

      <span class="comment">// call a D-Bus function that returns a D-Bus variant</span>
      <span class="type"><a href="../qtcore/qvariant.html">QVariant</a></span> v <span class="operator">=</span> callMyDBusFunction();
      <span class="comment">// retrieve the D-Bus variant</span>
      <span class="type"><a href="qdbusvariant.html#QDBusVariant">QDBusVariant</a></span> dbusVariant <span class="operator">=</span> qvariant_cast<span class="operator">&lt;</span><span class="type"><a href="qdbusvariant.html#QDBusVariant">QDBusVariant</a></span><span class="operator">&gt;</span>(v);
      <span class="comment">// retrieve the actual value stored in the D-Bus variant</span>
      <span class="type"><a href="../qtcore/qvariant.html">QVariant</a></span> result <span class="operator">=</span> dbusVariant<span class="operator">.</span>variant();

</pre>
<p>The <a href="../qtcore/qvariant.html">QVariant</a> within a <a href="qdbusvariant.html">QDBusVariant</a> is required to distinguish between a normal D-Bus value and a value within a D-Bus variant.</p>
</div>
<p><b>See also </b><a href="qdbustypesystem.html">The Qt D-Bus Type System</a>.</p>
<!-- @@@QDBusVariant -->
<div class="func">
<h2>Member Function Documentation</h2>
<!-- $$$QDBusVariant[overload1]$$$QDBusVariant -->
<h3 class="fn" id="QDBusVariant"><a name="QDBusVariant"></a>QDBusVariant::<span class="name">QDBusVariant</span>()</h3>
<p>Constructs a new D-Bus variant.</p>
<!-- @@@QDBusVariant -->
<!-- $$$QDBusVariant$$$QDBusVariantconstQVariant& -->
<h3 class="fn" id="QDBusVariant-1"><a name="QDBusVariant-1"></a>QDBusVariant::<span class="name">QDBusVariant</span>(const <span class="type"><a href="../qtcore/qvariant.html">QVariant</a></span> &amp;<i>variant</i>)</h3>
<p>Constructs a new D-Bus variant from the given Qt <i>variant</i>.</p>
<p><b>See also </b><a href="qdbusvariant.html#setVariant">setVariant</a>().</p>
<!-- @@@QDBusVariant -->
<!-- $$$QDBusVariant$$$QDBusVariantQVariant&& -->
<h3 class="fn" id="QDBusVariant-2"><a name="QDBusVariant-2"></a>QDBusVariant::<span class="name">QDBusVariant</span>(<span class="type"><a href="../qtcore/qvariant.html">QVariant</a></span> &amp;&amp;<i>v</i>)</h3>
<p>Default constructs an instance of QDBusVariant.</p><!-- @@@QDBusVariant -->
<!-- $$$setVariant[overload1]$$$setVariantconstQVariant& -->
<h3 class="fn" id="setVariant"><a name="setVariant"></a><span class="type">void</span> QDBusVariant::<span class="name">setVariant</span>(const <span class="type"><a href="../qtcore/qvariant.html">QVariant</a></span> &amp;<i>variant</i>)</h3>
<p>Assigns the value of the given Qt <i>variant</i> to this D-Bus variant.</p>
<p><b>See also </b><a href="qdbusvariant.html#variant">variant</a>().</p>
<!-- @@@setVariant -->
<!-- $$$swap[overload1]$$$swapQDBusVariant& -->
<h3 class="fn" id="swap"><a name="swap"></a><span class="type">void</span> QDBusVariant::<span class="name">swap</span>(<span class="type"><a href="qdbusvariant.html#QDBusVariant">QDBusVariant</a></span> &amp;<i>other</i>)</h3>
<!-- @@@swap -->
<!-- $$$variant[overload1]$$$variant -->
<h3 class="fn" id="variant"><a name="variant"></a><span class="type"><a href="../qtcore/qvariant.html">QVariant</a></span> QDBusVariant::<span class="name">variant</span>() const</h3>
<p>Returns this D-Bus variant as a <a href="../qtcore/qvariant.html">QVariant</a> object.</p>
<p><b>See also </b><a href="qdbusvariant.html#setVariant">setVariant</a>().</p>
<!-- @@@variant -->
</div>
        </div>
       </div>
   </div>
   </div>
</div>
<div class="footer">
   <p>
   <acronym title="Copyright">&copy;</acronym> 2017 The Qt Company Ltd.
   Documentation contributions included herein are the copyrights of
   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>    Qt and respective logos are trademarks of The Qt Company Ltd.     in Finland and/or other countries worldwide. All other trademarks are property
   of their respective owners. </p>
</div>
</body>
</html>

Perl :: Catalyst :: PostgreSQL :: RPM Valid HTML 4.01 Transitional