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Breadcrumbs go here --> <li><a href="modules.html">Modules</a></li> <li><a href="qtdesigner.html">QtDesigner</a></li> <li>QDesignerCustomWidgetCollectionInterface</li> </ul> </div> <div class="toolbuttons toolblock"> <ul> <li id="smallA" class="t_button">A</li> <li id="medA" class="t_button active">A</li> <li id="bigA" class="t_button">A</li> <li id="print" class="t_button"><a href="javascript:this.print();"> <span>Print</span></a></li> </ul> </div> </div> <div class="content mainContent"> <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> <h1 class="title">QDesignerCustomWidgetCollectionInterface Class Reference</h1> <!-- $$$QDesignerCustomWidgetCollectionInterface-brief --> <p>The QDesignerCustomWidgetCollectionInterface class allows you to include several custom widgets in one single library. <a href="#details">More...</a></p> <!-- @@@QDesignerCustomWidgetCollectionInterface --> <pre class="cpp"> <span class="preprocessor">#include <QDesignerCustomWidgetCollectionInterface></span></pre><ul> <li><a href="qdesignercustomwidgetcollectioninterface-members.html">List of all members, including inherited members</a></li> </ul> <a name="public-functions"></a> <h2>Public Functions</h2> <table class="alignedsummary"> <tr><td class="memItemLeft rightAlign topAlign"> virtual </td><td class="memItemRight bottomAlign"><b><a href="qdesignercustomwidgetcollectioninterface.html#dtor.QDesignerCustomWidgetCollectionInterface">~QDesignerCustomWidgetCollectionInterface</a></b> ()</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> virtual QList<QDesignerCustomWidgetInterface *> </td><td class="memItemRight bottomAlign"><b><a href="qdesignercustomwidgetcollectioninterface.html#customWidgets">customWidgets</a></b> () const = 0</td></tr> </table> <a name="details"></a> <!-- $$$QDesignerCustomWidgetCollectionInterface-description --> <div class="descr"> <h2>Detailed Description</h2> <p>The QDesignerCustomWidgetCollectionInterface class allows you to include several custom widgets in one single library.</p> <p>When implementing a custom widget plugin, you build it as a separate library. If you want to include several custom widget plugins in the same library, you must in addition subclass QDesignerCustomWidgetCollectionInterface.</p> <p>QDesignerCustomWidgetCollectionInterface contains one single function returning a list of the collection's <a href="qdesignercustomwidgetinterface.html">QDesignerCustomWidgetInterface</a> objects. For example, if you have several custom widgets <tt>CustomWidgetOne</tt>, <tt>CustomWidgetTwo</tt> and <tt>CustomWidgetThree</tt>, the class definition may look like this:</p> <pre class="cpp"> <span class="preprocessor">#include customwidgetoneinterface.h</span> <span class="preprocessor">#include customwidgettwointerface.h</span> <span class="preprocessor">#include customwidgetthreeinterface.h</span> <span class="preprocessor">#include <QtDesigner/QtDesigner></span> <span class="preprocessor">#include <QtCore/qplugin.h></span> <span class="keyword">class</span> MyCustomWidgets: <span class="keyword">public</span> <span class="type"><a href="qobject.html">QObject</a></span><span class="operator">,</span> <span class="keyword">public</span> <span class="type">QDesignerCustomWidgetCollectionInterface</span> { Q_OBJECT Q_INTERFACES(<span class="type">QDesignerCustomWidgetCollectionInterface</span>) <span class="keyword">public</span>: MyCustomWidgets(<span class="type"><a href="qobject.html">QObject</a></span> <span class="operator">*</span>parent <span class="operator">=</span> <span class="number">0</span>); <span class="keyword">virtual</span> <span class="type"><a href="qlist.html">QList</a></span><span class="operator"><</span><span class="type"><a href="qdesignercustomwidgetinterface.html">QDesignerCustomWidgetInterface</a></span><span class="operator">*</span><span class="operator">></span> customWidgets() <span class="keyword">const</span>; <span class="keyword">private</span>: <span class="type"><a href="qlist.html">QList</a></span><span class="operator"><</span><span class="type"><a href="qdesignercustomwidgetinterface.html">QDesignerCustomWidgetInterface</a></span><span class="operator">*</span><span class="operator">></span> widgets; };</pre> <p>In the class constructor you add the interfaces to your custom widgets to the list which you return in the <a href="qdesignercustomwidgetcollectioninterface.html#customWidgets">customWidgets</a>() function:</p> <pre class="cpp"> MyCustomWidgets<span class="operator">::</span>MyCustomWidgets(<span class="type"><a href="qobject.html">QObject</a></span> <span class="operator">*</span>parent) : <span class="type"><a href="qobject.html">QObject</a></span>(parent) { widgets<span class="operator">.</span>append(<span class="keyword">new</span> CustomWidgetOneInterface(<span class="keyword">this</span>)); widgets<span class="operator">.</span>append(<span class="keyword">new</span> CustomWidgetTwoInterface(<span class="keyword">this</span>)); widgets<span class="operator">.</span>append(<span class="keyword">new</span> CustomWidgetThreeInterface(<span class="keyword">this</span>)); } <span class="type"><a href="qlist.html">QList</a></span><span class="operator"><</span><span class="type"><a href="qdesignercustomwidgetinterface.html">QDesignerCustomWidgetInterface</a></span><span class="operator">*</span><span class="operator">></span> MyCustomWidgets<span class="operator">::</span><a href="qdesignercustomwidgetcollectioninterface.html#customWidgets">customWidgets</a>() <span class="keyword">const</span> { <span class="keyword">return</span> widgets; } <a href="qtplugin.html#Q_EXPORT_PLUGIN2">Q_EXPORT_PLUGIN2</a>(customwidgetsplugin<span class="operator">,</span> MyCustomWidgets)</pre> <p>Note that instead of exporting each custom widget plugin using the <a href="qtplugin.html#Q_EXPORT_PLUGIN2">Q_EXPORT_PLUGIN2</a>() macro, you export the entire collection. The <a href="qtplugin.html#Q_EXPORT_PLUGIN2">Q_EXPORT_PLUGIN2</a>() macro ensures that <i>Qt Designer</i> can access and construct the custom widgets. Without this macro, there is no way for <i>Qt Designer</i> to use them.</p> </div> <p><b>See also </b><a href="qdesignercustomwidgetinterface.html">QDesignerCustomWidgetInterface</a> and <a href="designer-creating-custom-widgets.html">Creating Custom Widgets for Qt Designer</a>.</p> <!-- @@@QDesignerCustomWidgetCollectionInterface --> <div class="func"> <h2>Member Function Documentation</h2> <!-- $$$~QDesignerCustomWidgetCollectionInterface[overload1]$$$~QDesignerCustomWidgetCollectionInterface --> <h3 class="fn"><a name="dtor.QDesignerCustomWidgetCollectionInterface"></a>QDesignerCustomWidgetCollectionInterface::<span class="name">~QDesignerCustomWidgetCollectionInterface</span> ()<tt> [virtual]</tt></h3> <p>Destroys the custom widget collection interface.</p> <!-- @@@~QDesignerCustomWidgetCollectionInterface --> <!-- $$$customWidgets[overload1]$$$customWidgets --> <h3 class="fn"><a name="customWidgets"></a><span class="type"><a href="qlist.html">QList</a></span><<span class="type"><a href="qdesignercustomwidgetinterface.html">QDesignerCustomWidgetInterface</a></span> *> QDesignerCustomWidgetCollectionInterface::<span class="name">customWidgets</span> () const<tt> [pure virtual]</tt></h3> <p>Returns a list of interfaces to the collection's custom widgets.</p> <!-- @@@customWidgets --> </div> </div> </div> </div> <div class="ft"> <span></span> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2013 Digia Plc and/or its subsidiaries. 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