<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/extensions/activeqt/examples/multiple/multiple.doc:44 --> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> <title>Two simple Qt widgets (in-process)</title> <style type="text/css"><!-- fn { margin-left: 1cm; text-indent: -1cm; } a:link { color: #004faf; text-decoration: none } a:visited { color: #672967; text-decoration: none } body { background: #ffffff; color: black; } --></style> </head> <body> <table border="0" cellpadding="0" cellspacing="0" width="100%"> <tr bgcolor="#E5E5E5"> <td valign=center> <a href="index.html"> <font color="#004faf">Home</font></a> | <a href="classes.html"> <font color="#004faf">All Classes</font></a> | <a href="mainclasses.html"> <font color="#004faf">Main Classes</font></a> | <a href="annotated.html"> <font color="#004faf">Annotated</font></a> | <a href="groups.html"> <font color="#004faf">Grouped Classes</font></a> | <a href="functions.html"> <font color="#004faf">Functions</font></a> </td> <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> The ActiveX controls in this example are simple <a href="qwidget.html">QWidget</a> subclasses reimplementing the paintEvent() method. The classes use the Q_CLASSINFO macro to <p> The example demonstrates the use of the Q_CLASSINFO macro to set <a href="activeqt.html#ActiveQt">ActiveQt</a>-specific attributes for <a href="qobject.html">QObject</a> sub classes, and the use of 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. <p> <pre> class QAxWidget1 : public <a href="qwidget.html">QWidget</a> { <a href="metaobjects.html#Q_OBJECT">Q_OBJECT</a> Q_CLASSINFO("ClassID", "{1D9928BD-4453-4bdd-903D-E525ED17FDE5}") Q_CLASSINFO("InterfaceID", "{99F6860E-2C5A-42ec-87F2-43396F4BE389}") Q_CLASSINFO("EventsID", "{0A3E9F27-E4F1-45bb-9E47-63099BCCD0E3}") </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 Q_CLASSINFO macro. <pre> Q_PROPERTY( QColor fillColor READ fillColor WRITE setFillColor ) public: QAxWidget1( <a href="qwidget.html">QWidget</a> *parent = 0, const char *name = 0, WFlags f = 0 ) : <a href="qwidget.html">QWidget</a>( parent, name, f ), fill_color( red ) { } <a href="qcolor.html">QColor</a> fillColor() const { return fill_color; } void setFillColor( const <a href="qcolor.html">QColor</a> &fc ) { fill_color = fc; repaint(); } protected: void paintEvent( <a href="qpaintevent.html">QPaintEvent</a> *e ) { <a href="qpainter.html">QPainter</a> paint( this ); <a href="qrect.html">QRect</a> r = rect(); <a name="x2544"></a> r.<a href="qrect.html#addCoords">addCoords</a>( 10, 10, -10, -10 ); <a name="x2543"></a> paint.<a href="qpainter.html#fillRect">fillRect</a>( r, fill_color ); } private: <a href="qcolor.html">QColor</a> fill_color; }; </pre>The control draws a filled rectangle. The fill color is exposed as a property using the Q_PROPERTY macro. <p> <pre> class QAxWidget2 : public <a href="qwidget.html">QWidget</a> { Q_OBJECT Q_CLASSINFO("ClassID", "{58139D56-6BE9-4b17-937D-1B1EDEDD5B71}") Q_CLASSINFO("InterfaceID", "{B66280AB-08CC-4dcc-924F-58E6D7975B7D}") Q_CLASSINFO("EventsID", "{D72BACBA-03C4-4480-B4BB-DE4FE3AA14A0}") Q_CLASSINFO("ToSuperClass", "QAxWidget2") Q_CLASSINFO("StockEvents", "yes") </pre>The declaration of the second control class uses the Q_CLASSINFO macro to set the COM identifiers as well as additional COM attributes for the class. Objects of that class will not expose the <a href="qwidget.html">QWidget</a> API, and provide the ActiveX stock events (ie. Click, KeyDown etc.). <pre> Q_PROPERTY( int lineWidth READ lineWidth WRITE setLineWidth ) public: QAxWidget2( <a href="qwidget.html">QWidget</a> *parent = 0, const char *name = 0, WFlags f = 0 ) : <a href="qwidget.html">QWidget</a>( parent, name, f ), line_width( 1 ) { } int lineWidth() const { return line_width; } void setLineWidth( int lw ) { line_width = lw; repaint(); } protected: void paintEvent( <a href="qpaintevent.html">QPaintEvent</a> *e ) { <a href="qpainter.html">QPainter</a> paint( this ); <a name="x2546"></a> <a href="qpen.html">QPen</a> pen = paint.<a href="qpainter.html#pen">pen</a>(); <a name="x2548"></a> pen.<a href="qpen.html#setWidth">setWidth</a>( line_width ); <a name="x2547"></a> paint.<a href="qpainter.html#setPen">setPen</a>( pen ); <a href="qrect.html">QRect</a> r = rect(); <a name="x2549"></a> r.<a href="qrect.html#addCoords">addCoords</a>( 10, 10, -10, -10 ); <a name="x2545"></a> paint.<a href="qpainter.html#drawEllipse">drawEllipse</a>( r ); } private: int line_width; }; </pre>The control draws a circle. The line width is exposed as a property using the Q_PROPERTY macro. <p> The controls are exposed by the implementation of <a href="qaxfactory.html">QAxFactory</a> as provided by the QAXFACTORY_BEGIN and QAXFACTORY_END macros. <pre> #include <<a href="qaxfactory-h.html">qaxfactory.h</a>> #include "ax1.h" #include "ax2.h" QAXFACTORY_BEGIN("{98DE28B6-6CD3-4e08-B9FA-3D1DB43F1D2F}", "{05828915-AD1C-47ab-AB96-D6AD1E25F0E2}") </pre>The factory is initialied using the QAXFACTORY_BEGIN macro, providing the IDs for the application and the type library. <pre> QAXCLASS(QAxWidget1) QAXCLASS(QAxWidget2) </pre>The classes exposed are listed using the QAXCLASS macro. <pre> QAXFACTORY_END() </pre>Finally the factory declaration is closed using the QAXFACTORY_END macro. <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 <tt>examples/multiple</tt>. <p> <hr> <p> The <a href="qaxserver-demo-multiple.html">demonstration</a> requires your WebBrowser to support ActiveX controls, and scripting to be enabled. <p> <pre> <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://www.trolltech.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://www.trolltech.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><p>See also <a href="qaxserver-examples.html">The QAxServer Examples</a>. <!-- eof --> <p><address><hr><div align=center> <table width=100% cellspacing=0 border=0><tr> <td>Copyright © 2007 <a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a> <td align=right><div align=right>Qt 3.3.8</div> </table></div></address></body> </html>