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Breadcrumbs go here --> <li><a href="modules.html">Modules</a></li> <li><a href="qaxserver.html">QAxServer</a></li> <li>QAxAggregated</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="#protected-functions">Protected Functions</a></li> <li class="level1"><a href="#details">Detailed Description</a></li> </ul> </div> <h1 class="title">QAxAggregated Class Reference</h1> <!-- $$$QAxAggregated-brief --> <p>The QAxAggregated class is an abstract base class for implementations of additional COM interfaces. <a href="#details">More...</a></p> <!-- @@@QAxAggregated --> <pre class="cpp"> <span class="preprocessor">#include <QAxAggregated></span></pre><ul> <li><a href="qaxaggregated-members.html">List of all members, including inherited members</a></li> </ul> <a name="public-functions"></a> <h2>Public Functions</h2> <table class="alignedsummary"> <tr><td class="memItemLeft rightAlign topAlign"> virtual long </td><td class="memItemRight bottomAlign"><b><a href="qaxaggregated.html#queryInterface">queryInterface</a></b> ( const QUuid & <i>iid</i>, void ** <i>iface</i> ) = 0</td></tr> </table> <a name="protected-functions"></a> <h2>Protected Functions</h2> <table class="alignedsummary"> <tr><td class="memItemLeft rightAlign topAlign"> virtual </td><td class="memItemRight bottomAlign"><b><a href="qaxaggregated.html#dtor.QAxAggregated">~QAxAggregated</a></b> ()</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> IUnknown * </td><td class="memItemRight bottomAlign"><b><a href="qaxaggregated.html#controllingUnknown">controllingUnknown</a></b> () const</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> QObject * </td><td class="memItemRight bottomAlign"><b><a href="qaxaggregated.html#object">object</a></b> () const</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> QWidget * </td><td class="memItemRight bottomAlign"><b><a href="qaxaggregated.html#widget">widget</a></b> () const</td></tr> </table> <a name="details"></a> <!-- $$$QAxAggregated-description --> <div class="descr"> <h2>Detailed Description</h2> <p>The QAxAggregated class is an abstract base class for implementations of additional COM interfaces.</p> <p>Create a subclass of QAxAggregated and reimplement <a href="qaxaggregated.html#queryInterface">queryInterface</a>() to support additional COM interfaces. Use multiple inheritance from those COM interfaces. Implement the IUnknown interface of those COM interfaces by delegating the calls to <tt>QueryInterface()</tt>, <tt>AddRef()</tt> and <tt>Release()</tt> to the interface provided by <a href="qaxaggregated.html#controllingUnknown">controllingUnknown</a>().</p> <p>Use the <a href="qaxaggregated.html#widget">widget</a>() method if you need to make calls to the <a href="qwidget.html">QWidget</a> implementing the ActiveX control. You must not store that pointer in your subclass (unless you use <a href="qpointer.html">QPointer</a>), as the <a href="qwidget.html">QWidget</a> can be destroyed by the <a href="activeqt.html#activeqt">ActiveQt</a> framework at any time.</p> </div> <p><b>See also </b><a href="qaxbindable.html">QAxBindable</a>, <a href="qaxfactory.html">QAxFactory</a>, and <a href="activeqt.html">Qt's ActiveX Framework (ActiveQt)</a>.</p> <!-- @@@QAxAggregated --> <div class="func"> <h2>Member Function Documentation</h2> <!-- $$$~QAxAggregated[overload1]$$$~QAxAggregated --> <h3 class="fn"><a name="dtor.QAxAggregated"></a>QAxAggregated::<span class="name">~QAxAggregated</span> ()<tt> [virtual protected]</tt></h3> <p>The destructor is called internally by Qt.</p> <!-- @@@~QAxAggregated --> <!-- $$$controllingUnknown[overload1]$$$controllingUnknown --> <h3 class="fn"><a name="controllingUnknown"></a><span class="type">IUnknown</span> * QAxAggregated::<span class="name">controllingUnknown</span> () const<tt> [protected]</tt></h3> <p>Returns the <tt>IUnknown</tt> interface of the ActiveX control. Implement the <tt>IUnknown</tt> interface in your <a href="qaxaggregated.html">QAxAggregated</a> subclass to delegate calls to <tt>QueryInterface()</tt>, <tt>AddRef()</tt>, and <tt>Release()</tt> to the interface provided by this function.</p> <pre class="cpp"> HRESULT AxImpl<span class="operator">::</span>QueryInterface(REFIID iid<span class="operator">,</span> <span class="type">void</span> <span class="operator">*</span><span class="operator">*</span>iface) { <span class="keyword">return</span> controllingUnknown()<span class="operator">-</span><span class="operator">></span>QueryInterface(iid<span class="operator">,</span> iface); } <span class="type"><a href="qtglobal.html#ulong-typedef">ulong</a></span> AxImpl<span class="operator">::</span>AddRef() { <span class="keyword">return</span> controllingUnknown()<span class="operator">-</span><span class="operator">></span>AddRef(); } <span class="type"><a href="qtglobal.html#ulong-typedef">ulong</a></span> AxImpl<span class="operator">::</span>Release() { <span class="keyword">return</span> controllingUnknown()<span class="operator">-</span><span class="operator">></span>Release(); }</pre> <p>Instead of declaring and implementing these three functions manually, you can use the <tt>QAXAGG_IUNKNOWN</tt> macro in the class declaration of your subclass.</p> <!-- @@@controllingUnknown --> <!-- $$$object[overload1]$$$object --> <h3 class="fn"><a name="object"></a><span class="type"><a href="qobject.html">QObject</a></span> * QAxAggregated::<span class="name">object</span> () const<tt> [protected]</tt></h3> <p>Returns a pointer to the <a href="qobject.html">QObject</a> subclass implementing the COM object. This function might return 0.</p> <p><b>Warning:</b> You must not store the returned pointer, unless you use a <a href="qpointer.html">QPointer</a>, since the <a href="qobject.html">QObject</a> can be destroyed by <a href="activeqt.html#activeqt">ActiveQt</a> at any time.</p> <!-- @@@object --> <!-- $$$queryInterface[overload1]$$$queryInterfaceconstQUuid&void** --> <h3 class="fn"><a name="queryInterface"></a><span class="type">long</span> QAxAggregated::<span class="name">queryInterface</span> ( const <span class="type"><a href="quuid.html">QUuid</a></span> & <i>iid</i>, <span class="type">void</span> ** <i>iface</i> )<tt> [pure virtual]</tt></h3> <p>Reimplement this pure virtual function to support additional COM interfaces. Set the value of <i>iface</i> to point to this object to support the interface <i>iid</i>. Note that you must cast the <tt>this</tt> pointer to the appropriate superclass.</p> <pre class="cpp"> <span class="type">long</span> AxImpl<span class="operator">::</span>queryInterface(<span class="keyword">const</span> <span class="type"><a href="quuid.html">QUuid</a></span> <span class="operator">&</span>iid<span class="operator">,</span> <span class="type">void</span> <span class="operator">*</span><span class="operator">*</span>iface) { <span class="operator">*</span>iface <span class="operator">=</span> <span class="number">0</span>; <span class="keyword">if</span> (iid <span class="operator">=</span><span class="operator">=</span> IID_ISomeCOMInterface) <span class="operator">*</span>iface <span class="operator">=</span> (ISomeCOMInterface<span class="operator">*</span>)<span class="keyword">this</span>; <span class="keyword">else</span> <span class="keyword">return</span> E_NOINTERFACE; AddRef(); <span class="keyword">return</span> S_OK; }</pre> <p>Return the standard COM results <tt>S_OK</tt> (interface is supported) or <tt>E_NOINTERFACE</tt> (requested interface is not supported).</p> <p><b>Warning:</b> Even though you must implement the <tt>IUnknown</tt> interface if you implement any COM interface you must not support the <tt>IUnknown</tt> interface in your queryInterface() implementation.</p> <!-- @@@queryInterface --> <!-- $$$widget[overload1]$$$widget --> <h3 class="fn"><a name="widget"></a><span class="type"><a href="qwidget.html">QWidget</a></span> * QAxAggregated::<span class="name">widget</span> () const<tt> [protected]</tt></h3> <p>Returns a pointer to the <a href="qwidget.html">QWidget</a> subclass implementing the ActiveX control. This function might return 0.</p> <p><b>Warning:</b> You must not store the returned pointer, unless you use a <a href="qpointer.html">QPointer</a>, since the <a href="qwidget.html">QWidget</a> can be destroyed by <a href="activeqt.html#activeqt">ActiveQt</a> at any time.</p> <!-- @@@widget --> </div> </div> </div> </div> <div class="ft"> <span></span> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2015 The Qt Company Ltd. 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