<!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/simple/simple.doc:45 --> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> <title>A simple ActiveQt control (executable)</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>A simple ActiveQt control (executable)</h1> The ActiveX control in this example is a layouted <a href="qwidget.html">QWidget</a> with a <a href="qslider.html">QSlider</a>, a <a href="qlcdnumber.html">QLCDNumber</a> and a <a href="qlineedit.html">QLineEdit</a>. It provides a signal/slot/property interface to change the values of the slider and the line edit, and to get notified of any property changes. <p> It demonstrates the use of <a href="qaxbindable.html#requestPropertyChange">QAxBindable::requestPropertyChange</a>() and <a href="qaxbindable.html#propertyChanged">QAxBindable::propertyChanged</a>(), and the use of the default <a href="qaxfactory.html">QAxFactory</a> through the <a href="qaxfactory.html#QAXFACTORY_DEFAULT">QAXFACTORY_DEFAULT</a> macro. <p> <p> The Qt implementation of the ActiveX for this example is <pre> class QSimpleAX : public <a href="qwidget.html">QWidget</a>, public QAxBindable { <a href="metaobjects.html#Q_OBJECT">Q_OBJECT</a> Q_PROPERTY( QString text READ text WRITE setText ) Q_PROPERTY( int value READ value WRITE setValue ) public: QSimpleAX( <a href="qwidget.html">QWidget</a> *parent = 0, const char *name = 0 ) : <a href="qwidget.html">QWidget</a>( parent, name ) { <a href="qvboxlayout.html">QVBoxLayout</a> *vbox = new <a href="qvboxlayout.html">QVBoxLayout</a>( this ); slider = new <a href="qslider.html">QSlider</a>( 0, 100, 1, 0, QSlider::Horizontal, this ); LCD = new <a href="qlcdnumber.html">QLCDNumber</a>( 3, this ); edit = new <a href="qlineedit.html">QLineEdit</a>( this ); <a name="x2528"></a> connect( slider, SIGNAL( <a href="qslider.html#valueChanged">valueChanged</a>( int ) ), this, SLOT( setValue(int) ) ); <a name="x2523"></a> connect( edit, SIGNAL(<a href="qlineedit.html#textChanged">textChanged</a>(const <a href="qstring.html">QString</a>&)), this, SLOT(setText(const <a href="qstring.html">QString</a>&)) ); vbox-><a href="qboxlayout.html#addWidget">addWidget</a>( slider ); vbox-><a href="qboxlayout.html#addWidget">addWidget</a>( LCD ); vbox-><a href="qboxlayout.html#addWidget">addWidget</a>( edit ); } <a href="qstring.html">QString</a> text() const { <a name="x2522"></a> return edit-><a href="qlineedit.html#text">text</a>(); } int value() const { <a name="x2527"></a> return slider-><a href="qslider.html#value">value</a>(); } signals: void someSignal(); void valueChanged(int); void textChanged(const <a href="qstring.html">QString</a>&); public slots: void setText( const <a href="qstring.html">QString</a> &string ) { if ( !requestPropertyChange( "text" ) ) return; <a name="x2525"></a> edit-><a href="qobject.html#blockSignals">blockSignals</a>( TRUE ); <a name="x2521"></a> edit-><a href="qlineedit.html#setText">setText</a>( string ); edit-><a href="qobject.html#blockSignals">blockSignals</a>( FALSE ); emit someSignal(); emit textChanged( string ); propertyChanged( "text" ); } void about() { <a name="x2524"></a> QMessageBox::<a href="qmessagebox.html#information">information</a>( this, "About QSimpleAX", "This is a Qt widget, and this slot has been\n" "called through ActiveX/OLE automation!" ); } void setValue( int i ) { if ( !requestPropertyChange( "value" ) ) return; slider-><a href="qobject.html#blockSignals">blockSignals</a>( TRUE ); <a name="x2526"></a> slider-><a href="qslider.html#setValue">setValue</a>( i ); slider-><a href="qobject.html#blockSignals">blockSignals</a>( FALSE ); LCD-><a href="qlcdnumber.html#display">display</a>( i ); emit valueChanged( i ); propertyChanged( "value" ); } private: <a href="qslider.html">QSlider</a> *slider; <a href="qlcdnumber.html">QLCDNumber</a> *LCD; <a href="qlineedit.html">QLineEdit</a> *edit; }; </pre> <p> The control is exported using the default <a href="qaxfactory.html">QAxFactory</a> <pre> QAXFACTORY_DEFAULT(QSimpleAX, "{DF16845C-92CD-4AAB-A982-EB9840E74669}", "{616F620B-91C5-4410-A74E-6B81C76FFFE0}", "{E1816BBA-BF5D-4A31-9855-D6BA432055FF}", "{EC08F8FC-2754-47AB-8EFE-56A54057F34E}", "{A095BA0C-224F-4933-A458-2DD7F6B85D8F}") </pre> <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/simple</tt>. <p> <hr> <p> The <a href="qaxserver-demo-simple.html">demonstration</a> requires your WebBrowser to support ActiveX controls, and scripting to be enabled. <p> The simple ActiveX control is embedded using the <tt><object></tt> tag. <pre> <object ID="QSimpleAX" CLASSID="CLSID:DF16845C-92CD-4AAB-A982-EB9840E74669" CODEBASE=http://www.trolltech.com/demos/simpleax.cab> <PARAM NAME="text" VALUE="A simple control"> <PARAM NAME="value" VALUE="1"> [Object not available! Did you forget to build and register the server?] </object> </pre> <p> A simple HTML button is connected to the <a href="activeqt.html#ActiveQt">ActiveQt</a>'s about() slot. <pre> <FORM> <INPUT TYPE="BUTTON" VALUE="About..." onClick="QSimpleAX.about()"> </FORM> </pre> <p> A second ActiveX control - the standard Calendar Control - is instantiated <pre> <object ID="Calendar" CLASSID="CLSID:8E27C92B-1264-101C-8A2F-040224009C02"> [Standard Calendar control not available!] <PARAM NAME="day" VALUE="1"> </object> </pre> <p> Events from the ActiveX controls are handled using both Visual Basic Script and JavaScript. <pre> <SCRIPT LANGUAGE=VBScript> Sub Calendar_Click() MsgBox( "Calendar Clicked!" ) End Sub Sub QSimpleAX_TextChanged( str ) document.title = str End Sub </SCRIPT> <SCRIPT LANGUAGE=JavaScript> function QSimpleAX::ValueChanged( Newvalue ) { Calendar.Day = Newvalue; } </SCRIPT> </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>