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<h1 class="title">Multiple Example (ActiveQt)</h1>
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<!-- $$$activeqt/multiple-description -->
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<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>
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<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">"ClassID"</span><span class="operator">,</span> <span class="string">"{1D9928BD-4453-4bdd-903D-E525ED17FDE5}"</span>)
Q_CLASSINFO(<span class="string">"InterfaceID"</span><span class="operator">,</span> <span class="string">"{99F6860E-2C5A-42ec-87F2-43396F4BE389}"</span>)
Q_CLASSINFO(<span class="string">"EventsID"</span><span class="operator">,</span> <span class="string">"{0A3E9F27-E4F1-45bb-9E47-63099BCCD0E3}"</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">&</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">"ClassID"</span><span class="operator">,</span> <span class="string">"{58139D56-6BE9-4b17-937D-1B1EDEDD5B71}"</span>)
Q_CLASSINFO(<span class="string">"InterfaceID"</span><span class="operator">,</span> <span class="string">"{B66280AB-08CC-4dcc-924F-58E6D7975B7D}"</span>)
Q_CLASSINFO(<span class="string">"EventsID"</span><span class="operator">,</span> <span class="string">"{D72BACBA-03C4-4480-B4BB-DE4FE3AA14A0}"</span>)
Q_CLASSINFO(<span class="string">"ToSuperClass"</span><span class="operator">,</span> <span class="string">"QAxWidget2"</span>)
Q_CLASSINFO(<span class="string">"StockEvents"</span><span class="operator">,</span> <span class="string">"yes"</span>)
Q_CLASSINFO(<span class="string">"Insertable"</span><span class="operator">,</span> <span class="string">"yes"</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 "ax1.h"</span>
<span class="preprocessor">#include "ax2.h"</span>
<span class="preprocessor">#include <QAxFactory></span>
QT_USE_NAMESPACE
<a href="qaxfactory.html#QAXFACTORY_BEGIN">QAXFACTORY_BEGIN</a>(<span class="string">"{98DE28B6-6CD3-4e08-B9FA-3D1DB43F1D2F}"</span><span class="operator">,</span> <span class="string">"{05828915-AD1C-47ab-AB96-D6AD1E25F0E2}"</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"> <script language="javascript">
function setColor( form )
{
Ax1.fillColor = form.colorEdit.value;
}
function setWidth( form )
{
Ax2.lineWidth = form.widthEdit.value;
}
</script>
<p />
This is one QWidget subclass:<br />
<object ID="Ax1" CLASSID="CLSID:1D9928BD-4453-4bdd-903D-E525ED17FDE5"
CODEBASE="http://qt.nokia.com/demos/multipleax.cab">
[Object not available! Did you forget to build and register the server?]
</object><br />
<form>
Fill Color: <input type="edit" ID="colorEdit" value = "red" />
<input type="button" value = "Set" onClick="setColor(this.form)" />
<input type="button" value = "Hide" onClick="Ax1.hide()" />
<input type="button" value = "Show" onClick="Ax1.show()" />
</form>
<p />
This is another QWidget subclass:<br />
<object ID="Ax2" CLASSID="CLSID:58139D56-6BE9-4b17-937D-1B1EDEDD5B71"
CODEBASE="http://qt.nokia.com/demos/multipleax.cab">
[Object not available! Did you forget to build and register the server?]
</object><br />
<form>
Line width: <input type="edit" ID="widthEdit" value = "1" />
<input type="button" value = "Set" onClick="setWidth(this.form)" />
</form></pre>
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