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202 lines
8.3 KiB
202 lines
8.3 KiB
14 years ago
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/extensions/activeqt/examples/multiple/multiple.doc:44 -->
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
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<title>Two simple Qt widgets (in-process)</title>
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<font color="#004faf">Home</font></a>
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<font color="#004faf">All Classes</font></a>
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<font color="#004faf">Main Classes</font></a>
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<font color="#004faf">Functions</font></a>
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<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>Two simple Qt widgets (in-process)</h1>
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The ActiveX controls in this example are simple <a href="qwidget.html">QWidget</a>
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subclasses reimplementing the paintEvent() method. The classes use
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the Q_CLASSINFO macro to
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<p> The example demonstrates the use of the Q_CLASSINFO macro to set
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<a href="activeqt.html#ActiveQt">ActiveQt</a>-specific attributes for <a href="qobject.html">QObject</a> sub classes, and the use of
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the <a href="qaxfactory.html#QAXFACTORY_BEGIN">QAXFACTORY_BEGIN</a>, <a href="qaxfactory.html#QAXCLASS">QAXCLASS</a> and <a href="qaxfactory.html#QAXFACTORY_END">QAXFACTORY_END</a> macros.
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<p>
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<pre> class QAxWidget1 : public <a href="qwidget.html">QWidget</a>
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{
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<a href="metaobjects.html#Q_OBJECT">Q_OBJECT</a>
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Q_CLASSINFO("ClassID", "{1D9928BD-4453-4bdd-903D-E525ED17FDE5}")
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Q_CLASSINFO("InterfaceID", "{99F6860E-2C5A-42ec-87F2-43396F4BE389}")
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Q_CLASSINFO("EventsID", "{0A3E9F27-E4F1-45bb-9E47-63099BCCD0E3}")
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</pre>The class declaration includes the Q_OBJECT macro to activate Qt's <a href="metaobjects.html#meta-object">meta object</a> system, and sets COM identifiers for the class using the
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Q_CLASSINFO macro.
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<pre> Q_PROPERTY( QColor fillColor READ fillColor WRITE setFillColor )
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public:
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QAxWidget1( <a href="qwidget.html">QWidget</a> *parent = 0, const char *name = 0, WFlags f = 0 )
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: <a href="qwidget.html">QWidget</a>( parent, name, f ), fill_color( red )
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{
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}
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<a href="qcolor.html">QColor</a> fillColor() const
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{
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return fill_color;
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}
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void setFillColor( const <a href="qcolor.html">QColor</a> &fc )
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{
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fill_color = fc;
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repaint();
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}
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protected:
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void paintEvent( <a href="qpaintevent.html">QPaintEvent</a> *e )
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{
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<a href="qpainter.html">QPainter</a> paint( this );
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<a href="qrect.html">QRect</a> r = rect();
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<a name="x2544"></a> r.<a href="qrect.html#addCoords">addCoords</a>( 10, 10, -10, -10 );
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<a name="x2543"></a> paint.<a href="qpainter.html#fillRect">fillRect</a>( r, fill_color );
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}
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private:
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<a href="qcolor.html">QColor</a> fill_color;
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};
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</pre>The control draws a filled rectangle. The fill color is exposed as a
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property using the Q_PROPERTY macro.
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<p>
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<pre> class QAxWidget2 : public <a href="qwidget.html">QWidget</a>
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{
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Q_OBJECT
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Q_CLASSINFO("ClassID", "{58139D56-6BE9-4b17-937D-1B1EDEDD5B71}")
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Q_CLASSINFO("InterfaceID", "{B66280AB-08CC-4dcc-924F-58E6D7975B7D}")
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Q_CLASSINFO("EventsID", "{D72BACBA-03C4-4480-B4BB-DE4FE3AA14A0}")
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Q_CLASSINFO("ToSuperClass", "QAxWidget2")
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Q_CLASSINFO("StockEvents", "yes")
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</pre>The declaration of the second control class uses the Q_CLASSINFO macro
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to set the COM identifiers as well as additional COM attributes for the
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class. Objects of that class will not expose the <a href="qwidget.html">QWidget</a> API, and provide
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the ActiveX stock events (ie. Click, KeyDown etc.).
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<pre> Q_PROPERTY( int lineWidth READ lineWidth WRITE setLineWidth )
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public:
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QAxWidget2( <a href="qwidget.html">QWidget</a> *parent = 0, const char *name = 0, WFlags f = 0 )
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: <a href="qwidget.html">QWidget</a>( parent, name, f ), line_width( 1 )
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{
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}
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int lineWidth() const
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{
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return line_width;
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}
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void setLineWidth( int lw )
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{
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line_width = lw;
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repaint();
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}
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protected:
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void paintEvent( <a href="qpaintevent.html">QPaintEvent</a> *e )
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{
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<a href="qpainter.html">QPainter</a> paint( this );
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<a name="x2546"></a> <a href="qpen.html">QPen</a> pen = paint.<a href="qpainter.html#pen">pen</a>();
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<a name="x2548"></a> pen.<a href="qpen.html#setWidth">setWidth</a>( line_width );
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<a name="x2547"></a> paint.<a href="qpainter.html#setPen">setPen</a>( pen );
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<a href="qrect.html">QRect</a> r = rect();
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<a name="x2549"></a> r.<a href="qrect.html#addCoords">addCoords</a>( 10, 10, -10, -10 );
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<a name="x2545"></a> paint.<a href="qpainter.html#drawEllipse">drawEllipse</a>( r );
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}
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private:
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int line_width;
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};
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</pre>The control draws a circle. The line width is exposed as a property
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using the Q_PROPERTY macro.
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<p> The controls are exposed by the implementation of <a href="qaxfactory.html">QAxFactory</a> as provided
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by the QAXFACTORY_BEGIN and QAXFACTORY_END macros.
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<pre> #include <<a href="qaxfactory-h.html">qaxfactory.h</a>>
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#include "ax1.h"
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#include "ax2.h"
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QAXFACTORY_BEGIN("{98DE28B6-6CD3-4e08-B9FA-3D1DB43F1D2F}", "{05828915-AD1C-47ab-AB96-D6AD1E25F0E2}")
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</pre>The factory is initialied using the QAXFACTORY_BEGIN macro, providing
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the IDs for the application and the type library.
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<pre> QAXCLASS(QAxWidget1)
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QAXCLASS(QAxWidget2)
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</pre>The classes exposed are listed using the QAXCLASS macro.
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<pre> QAXFACTORY_END()
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</pre>Finally the factory declaration is closed using the QAXFACTORY_END
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macro.
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<p> To build the example you must first build the <a href="qaxserver.html">QAxServer</a> library. Then run qmake and your make tool in
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<tt>examples/multiple</tt>.
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<p> <hr>
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<p> The <a href="qaxserver-demo-multiple.html">demonstration</a> requires your
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WebBrowser to support ActiveX controls, and scripting to be enabled.
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<p>
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<pre> <script language=javascript>
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function setColor( form )
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{
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Ax1.fillColor = form.colorEdit.value;
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}
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function setWidth( form )
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{
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Ax2.lineWidth = form.widthEdit.value;
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}
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</script>
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<p>
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This is one QWidget subclass:<br>
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<object ID="Ax1" CLASSID="CLSID:1D9928BD-4453-4bdd-903D-E525ED17FDE5"
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CODEBASE=http://www.trolltech.com/demos/multipleax.cab>
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[Object not available! Did you forget to build and register the server?]
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</object><br>
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<form>
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Fill Color: <input type="edit" ID="colorEdit" value = "red">
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<input type="button" value = "Set" onClick="setColor(this.form)">
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<input type="button" value = "Hide" onClick="Ax1.hide()">
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<input type="button" value = "Show" onClick="Ax1.show()">
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</form>
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<p>
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This is another QWidget subclass:<br>
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<object ID="Ax2" CLASSID="CLSID:58139D56-6BE9-4b17-937D-1B1EDEDD5B71"
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CODEBASE=http://www.trolltech.com/demos/multipleax.cab>
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[Object not available! Did you forget to build and register the server?]
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</object><br>
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<form>
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Line width: <input type="edit" ID="widthEdit" value = "1">
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<input type="button" value = "Set" onClick="setWidth(this.form)">
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</form>
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</pre><p>See also <a href="qaxserver-examples.html">The QAxServer Examples</a>.
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<!-- eof -->
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<p><address><hr><div align=center>
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<table width=100% cellspacing=0 border=0><tr>
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<td>Copyright © 2007
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<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
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<td align=right><div align=right>Qt 3.3.8</div>
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</table></div></address></body>
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