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<h1 class="title">QAbstractExtensionManager Class</h1>
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<p>The QAbstractExtensionManager class provides an interface for extension managers in Qt Designer. <a href="#details">More...</a></p>
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<tr><td class="memItemLeft rightAlign topAlign"> Header:</td><td class="memItemRight bottomAlign"> </b><tt><span class="preprocessor">#include <QAbstractExtensionManager></span>
</tt></td></tr><tr><td class="memItemLeft rightAlign topAlign"> qmake:</td><td class="memItemRight bottomAlign"> <tt>QT += designer</tt></td></tr><tr><td class="memItemLeft rightAlign topAlign"> Inherited By:</td><td class="memItemRight bottomAlign"> <p><a href="qextensionmanager.html">QExtensionManager</a>.</p>
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<h2>Public Functions</h2>
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<tr><td class="memItemLeft rightAlign topAlign"> virtual </td><td class="memItemRight bottomAlign"><b><a href="qabstractextensionmanager.html#dtor.QAbstractExtensionManager">~QAbstractExtensionManager</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual QObject * </td><td class="memItemRight bottomAlign"><b><a href="qabstractextensionmanager.html#extension">extension</a></b>(QObject *<i> object</i>, const QString &<i> iid</i>) const = 0</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qabstractextensionmanager.html#registerExtensions">registerExtensions</a></b>(QAbstractExtensionFactory *<i> factory</i>, const QString &<i> iid</i>) = 0</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qabstractextensionmanager.html#unregisterExtensions">unregisterExtensions</a></b>(QAbstractExtensionFactory *<i> factory</i>, const QString &<i> iid</i>) = 0</td></tr>
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<h2>Detailed Description</h2>
<p>The QAbstractExtensionManager class provides an interface for extension managers in Qt Designer.</p>
<p>QAbstractExtensionManager is not intended to be instantiated directly; use the <a href="qextensionmanager.html">QExtensionManager</a> instead.</p>
<p>In <i>Qt Designer</i>, extension are not created until they are required. For that reason, when implementing a custom extension, you must also create a <a href="qextensionfactory.html">QExtensionFactory</a>, i.e a class that is able to make an instance of your extension, and register it using <i>Qt Designer</i>'s <a href="qextensionmanager.html">extension manager</a>.</p>
<p>When an extension is required, <i>Qt Designer</i>'s <a href="qextensionmanager.html">extension manager</a> will run through all its registered factories calling <a href="qextensionfactory.html#createExtension">QExtensionFactory::createExtension</a>() for each until the first one that is able to create the requested extension for the selected object, is found. This factory will then make an instance of the extension.</p>
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<p><b>See also </b><a href="qextensionmanager.html">QExtensionManager</a> and <a href="qextensionfactory.html">QExtensionFactory</a>.</p>
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<h2>Member Function Documentation</h2>
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<h3 class="fn"><a name="dtor.QAbstractExtensionManager"></a>QAbstractExtensionManager::<span class="name">~QAbstractExtensionManager</span>()<tt> [virtual]</tt></h3>
<p>Destroys the extension manager.</p>
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<h3 class="fn"><a name="extension"></a><span class="type"><a href="../qtcore/qobject.html">QObject</a></span> * QAbstractExtensionManager::<span class="name">extension</span>(<span class="type"><a href="../qtcore/qobject.html">QObject</a></span> *<i> object</i>, const <span class="type"><a href="../qtcore/qstring.html">QString</a></span> &<i> iid</i>) const<tt> [pure virtual]</tt></h3>
<p>Returns the extension, specified by <i>iid</i>, for the given <i>object</i>.</p>
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<h3 class="fn"><a name="registerExtensions"></a><span class="type">void</span> QAbstractExtensionManager::<span class="name">registerExtensions</span>(<span class="type">QAbstractExtensionFactory</span> *<i> factory</i>, const <span class="type"><a href="../qtcore/qstring.html">QString</a></span> &<i> iid</i>)<tt> [pure virtual]</tt></h3>
<p>Register the given extension <i>factory</i> with the extension specified by <i>iid</i>.</p>
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<h3 class="fn"><a name="unregisterExtensions"></a><span class="type">void</span> QAbstractExtensionManager::<span class="name">unregisterExtensions</span>(<span class="type">QAbstractExtensionFactory</span> *<i> factory</i>, const <span class="type"><a href="../qtcore/qstring.html">QString</a></span> &<i> iid</i>)<tt> [pure virtual]</tt></h3>
<p>Unregister the given <i>factory</i> with the extension specified by <i>iid</i>.</p>
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