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  <title>Qt 4.8: Multiple Example (ActiveQt)</title>
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    <a href="index.html" class="qtref"><span>Qt Reference Documentation</span></a>
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<h1 class="title">Multiple Example (ActiveQt)</h1>
<span class="subtitle"></span>
<!-- $$$activeqt/multiple-description -->
<div class="descr"> <a name="details"></a>
<p>Files:</p>
<ul>
<li><a href="activeqt-multiple-ax1-h.html">activeqt/multiple/ax1.h</a></li>
<li><a href="activeqt-multiple-ax2-h.html">activeqt/multiple/ax2.h</a></li>
<li><a href="activeqt-multiple-main-cpp.html">activeqt/multiple/main.cpp</a></li>
<li><a href="activeqt-multiple-multiple-pro.html">activeqt/multiple/multiple.pro</a></li>
</ul>
<p>The Multiple example demonstrates the implementation of a <a href="qaxfactory.html">QAxFactory</a> to provide multiple ActiveX controls in a single in process ActiveX server using the <tt>QAXFACTORY_EXPORT()</tt> macro.<p>The ActiveX controls in this example are simple <a href="qwidget.html">QWidget</a> subclasses that reimplement <a href="qwidget.html#paintEvent">QWidget::paintEvent</a>().</p>
<pre class="cpp"> <span class="keyword">class</span> QAxWidget1 : <span class="keyword">public</span> <span class="type"><a href="qwidget.html">QWidget</a></span>
 {
     Q_OBJECT
     Q_CLASSINFO(<span class="string">&quot;ClassID&quot;</span><span class="operator">,</span> <span class="string">&quot;{1D9928BD-4453-4bdd-903D-E525ED17FDE5}&quot;</span>)
     Q_CLASSINFO(<span class="string">&quot;InterfaceID&quot;</span><span class="operator">,</span> <span class="string">&quot;{99F6860E-2C5A-42ec-87F2-43396F4BE389}&quot;</span>)
     Q_CLASSINFO(<span class="string">&quot;EventsID&quot;</span><span class="operator">,</span> <span class="string">&quot;{0A3E9F27-E4F1-45bb-9E47-63099BCCD0E3}&quot;</span>)

     Q_PROPERTY(<span class="type"><a href="qcolor.html">QColor</a></span> fillColor READ fillColor WRITE setFillColor)
 <span class="keyword">public</span>:
     QAxWidget1(<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>parent <span class="operator">=</span> <span class="number">0</span>)
         : <span class="type"><a href="qwidget.html">QWidget</a></span>(parent)<span class="operator">,</span> fill_color(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>red)
     {
     }

     <span class="type"><a href="qcolor.html">QColor</a></span> fillColor() <span class="keyword">const</span>
     {
         <span class="keyword">return</span> fill_color;
     }
     <span class="type">void</span> setFillColor(<span class="keyword">const</span> <span class="type"><a href="qcolor.html">QColor</a></span> <span class="operator">&amp;</span>fc)
     {
         fill_color <span class="operator">=</span> fc;
         repaint();
     }

 <span class="keyword">protected</span>:
     <span class="type">void</span> paintEvent(<span class="type"><a href="qpaintevent.html">QPaintEvent</a></span> <span class="operator">*</span>e)
     {
         <span class="type"><a href="qpainter.html">QPainter</a></span> paint(<span class="keyword">this</span>);
         <span class="type"><a href="qrect.html">QRect</a></span> r <span class="operator">=</span> rect();
         r<span class="operator">.</span>adjust(<span class="number">10</span><span class="operator">,</span> <span class="number">10</span><span class="operator">,</span> <span class="operator">-</span><span class="number">10</span><span class="operator">,</span> <span class="operator">-</span><span class="number">10</span>);
         paint<span class="operator">.</span>fillRect(r<span class="operator">,</span> fill_color);
     }

 <span class="keyword">private</span>:
     <span class="type"><a href="qcolor.html">QColor</a></span> fill_color;
 };</pre>
<p>The first control draws a filled rectangle. The fill color is exposed as a property. <tt>Q_CLASSINFO()</tt> is used to specify the COM identifiers.</p>
<pre class="cpp"> <span class="keyword">class</span> QAxWidget2 : <span class="keyword">public</span> <span class="type"><a href="qwidget.html">QWidget</a></span>
 {
     Q_OBJECT
     Q_CLASSINFO(<span class="string">&quot;ClassID&quot;</span><span class="operator">,</span> <span class="string">&quot;{58139D56-6BE9-4b17-937D-1B1EDEDD5B71}&quot;</span>)
     Q_CLASSINFO(<span class="string">&quot;InterfaceID&quot;</span><span class="operator">,</span> <span class="string">&quot;{B66280AB-08CC-4dcc-924F-58E6D7975B7D}&quot;</span>)
     Q_CLASSINFO(<span class="string">&quot;EventsID&quot;</span><span class="operator">,</span> <span class="string">&quot;{D72BACBA-03C4-4480-B4BB-DE4FE3AA14A0}&quot;</span>)
     Q_CLASSINFO(<span class="string">&quot;ToSuperClass&quot;</span><span class="operator">,</span> <span class="string">&quot;QAxWidget2&quot;</span>)
     Q_CLASSINFO(<span class="string">&quot;StockEvents&quot;</span><span class="operator">,</span> <span class="string">&quot;yes&quot;</span>)
     Q_CLASSINFO(<span class="string">&quot;Insertable&quot;</span><span class="operator">,</span> <span class="string">&quot;yes&quot;</span>)

     Q_PROPERTY( <span class="type">int</span> lineWidth READ lineWidth WRITE setLineWidth )
 <span class="keyword">public</span>:
     QAxWidget2(<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>parent <span class="operator">=</span> <span class="number">0</span>)
         : <span class="type"><a href="qwidget.html">QWidget</a></span>(parent)<span class="operator">,</span> line_width( <span class="number">1</span> )
     {
     }

     <span class="type">int</span> lineWidth() <span class="keyword">const</span>
     {
         <span class="keyword">return</span> line_width;
     }
     <span class="type">void</span> setLineWidth( <span class="type">int</span> lw )
     {
         line_width <span class="operator">=</span> lw;
         repaint();
     }

 <span class="keyword">protected</span>:
     <span class="type">void</span> paintEvent( <span class="type"><a href="qpaintevent.html">QPaintEvent</a></span> <span class="operator">*</span>e )
     {
         <span class="type"><a href="qpainter.html">QPainter</a></span> paint( <span class="keyword">this</span> );
         <span class="type"><a href="qpen.html">QPen</a></span> pen <span class="operator">=</span> paint<span class="operator">.</span>pen();
         pen<span class="operator">.</span>setWidth( line_width );
         paint<span class="operator">.</span>setPen( pen );

         <span class="type"><a href="qrect.html">QRect</a></span> r <span class="operator">=</span> rect();
         r<span class="operator">.</span>adjust( <span class="number">10</span><span class="operator">,</span> <span class="number">10</span><span class="operator">,</span> <span class="operator">-</span><span class="number">10</span><span class="operator">,</span> <span class="operator">-</span><span class="number">10</span> );
         paint<span class="operator">.</span>drawEllipse( r );
     }

 <span class="keyword">private</span>:
     <span class="type">int</span> line_width;
 };</pre>
<p>The second control draws a circle. The linewith is exposed as a property. <tt>Q_CLASSINFO()</tt> is used to specify the COM identifiers, and to set the attributes <i>ToSuperClass</i> and <i>StockEvents</i> to expose only the API of the class itself, and to add COM stock events to the ActiveX control.</p>
<pre class="cpp"> <span class="preprocessor">#include &quot;ax1.h&quot;</span>
 <span class="preprocessor">#include &quot;ax2.h&quot;</span>
 <span class="preprocessor">#include &lt;QAxFactory&gt;</span>

 QT_USE_NAMESPACE

 <a href="qaxfactory.html#QAXFACTORY_BEGIN">QAXFACTORY_BEGIN</a>(<span class="string">&quot;{98DE28B6-6CD3-4e08-B9FA-3D1DB43F1D2F}&quot;</span><span class="operator">,</span> <span class="string">&quot;{05828915-AD1C-47ab-AB96-D6AD1E25F0E2}&quot;</span>)
     <a href="qaxfactory.html#QAXCLASS">QAXCLASS</a>(QAxWidget1)
     <a href="qaxfactory.html#QAXCLASS">QAXCLASS</a>(QAxWidget2)
 <a href="qaxfactory.html#QAXFACTORY_END">QAXFACTORY_END</a>()</pre>
<p>The classes are exported from the server using the <a href="qaxfactory.html">QAxFactory</a> macros.</p>
<p>To build the example you must first build the <a href="qaxserver.html">QAxServer</a> library. Then run <tt>qmake</tt> and your make tool in <tt>examples/activeqt/multiple</tt>.</p>
<p>The <a href="qaxserver-demo-multiple.html">demonstration</a> requires your WebBrowser to support ActiveX controls, and scripting to be enabled.</p>
<pre class="cpp"> &lt;script language=&quot;javascript&quot;&gt;
 function setColor( form )
 {
     Ax1.fillColor = form.colorEdit.value;
 }

 function setWidth( form )
 {
     Ax2.lineWidth = form.widthEdit.value;
 }
 &lt;/script&gt;

 &lt;p /&gt;
 This is one QWidget subclass:&lt;br /&gt;
 &lt;object ID=&quot;Ax1&quot; CLASSID=&quot;CLSID:1D9928BD-4453-4bdd-903D-E525ED17FDE5&quot;
 CODEBASE=&quot;http://qt.nokia.com/demos/multipleax.cab&quot;&gt;
 [Object not available! Did you forget to build and register the server?]
 &lt;/object&gt;&lt;br /&gt;
 &lt;form&gt;
 Fill Color: &lt;input type=&quot;edit&quot; ID=&quot;colorEdit&quot; value = &quot;red&quot; /&gt;
 &lt;input type=&quot;button&quot; value = &quot;Set&quot; onClick=&quot;setColor(this.form)&quot; /&gt;
 &lt;input type=&quot;button&quot; value = &quot;Hide&quot; onClick=&quot;Ax1.hide()&quot; /&gt;
 &lt;input type=&quot;button&quot; value = &quot;Show&quot; onClick=&quot;Ax1.show()&quot; /&gt;
 &lt;/form&gt;

 &lt;p /&gt;
 This is another QWidget subclass:&lt;br /&gt;
 &lt;object ID=&quot;Ax2&quot; CLASSID=&quot;CLSID:58139D56-6BE9-4b17-937D-1B1EDEDD5B71&quot;
 CODEBASE=&quot;http://qt.nokia.com/demos/multipleax.cab&quot;&gt;
 [Object not available! Did you forget to build and register the server?]
 &lt;/object&gt;&lt;br /&gt;
 &lt;form&gt;
 Line width: &lt;input type=&quot;edit&quot; ID=&quot;widthEdit&quot; value = &quot;1&quot; /&gt;
 &lt;input type=&quot;button&quot; value = &quot;Set&quot; onClick=&quot;setWidth(this.form)&quot; /&gt;
 &lt;/form&gt;</pre>
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