<?xml version="1.0" encoding="iso-8859-1"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> <!-- /tmp/qt-4.3.4-qt-1203442408707/qt-x11-opensource-src-4.3.4/doc/src/examples/activeqt/simple.qdoc --> <head> <title>Qt 4.3: Simple Example (ActiveQt)</title> <link href="classic.css" rel="stylesheet" type="text/css" /> </head> <body> <table border="0" cellpadding="0" cellspacing="0" width="100%"> <tr> <td align="left" valign="top" width="32"><a href="http://www.trolltech.com/products/qt"><img src="images/qt-logo.png" align="left" width="32" height="32" border="0" /></a></td> <td width="1"> </td><td class="postheader" 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="groups.html"><font color="#004faf">Grouped Classes</font></a> · <a href="modules.html"><font color="#004faf">Modules</font></a> · <a href="functions.html"><font color="#004faf">Functions</font></a></td> <td align="right" valign="top" width="230"><a href="http://www.trolltech.com"><img src="images/trolltech-logo.png" align="right" width="203" height="32" border="0" /></a></td></tr></table><h1 align="center">Simple Example (ActiveQt)<br /><small></small></h1> <p>Files:</p> <ul> <li><a href="activeqt-simple-main-cpp.html">activeqt/simple/main.cpp</a></li> </ul> <p>The Simple example 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 <tt>QAXFACTORY_DEFAULT()</tt> macro.</p> <p>The ActiveX control in this example is a laid out <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> <p>The Qt implementation of the ActiveX for this example is</p> <pre> class QSimpleAX : public QWidget, public QAxBindable { Q_OBJECT Q_PROPERTY( QString text READ text WRITE setText ) Q_PROPERTY( int value READ value WRITE setValue ) public: QSimpleAX(QWidget *parent = 0) : QWidget(parent) { QVBoxLayout *vbox = new QVBoxLayout( this ); slider = new QSlider( Qt::Horizontal, this ); LCD = new QLCDNumber( 3, this ); edit = new QLineEdit( this ); connect( slider, SIGNAL( valueChanged( int ) ), this, SLOT( setValue(int) ) ); connect( edit, SIGNAL(textChanged(const QString&)), this, SLOT(setText(const QString&)) ); vbox->addWidget( slider ); vbox->addWidget( LCD ); vbox->addWidget( edit ); } QString text() const { return edit->text(); } int value() const { return slider->value(); } signals: void someSignal(); void valueChanged(int); void textChanged(const QString&); public slots: void setText( const QString &string ) { if ( !requestPropertyChange( "text" ) ) return; edit->blockSignals( true ); edit->setText( string ); edit->blockSignals( false ); emit someSignal(); emit textChanged( string ); propertyChanged( "text" ); } void about() { QMessageBox::information( 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->blockSignals( true ); slider->setValue( i ); slider->blockSignals( false ); LCD->display( i ); emit valueChanged( i ); propertyChanged( "value" ); } private: QSlider *slider; QLCDNumber *LCD; QLineEdit *edit; };</pre> <p>The control is exported using the default <a href="qaxfactory.html">QAxFactory</a></p> <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/activeqt/simple</tt>.</p> <p>The <a href="qaxserver-demo-simple.html">demonstration</a> requires your WebBrowser to support ActiveX controls, and scripting to be enabled.</p> <p>The simple ActiveX control is embedded using the <tt><object></tt> tag.</p> <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.</p> <pre> <FORM> <INPUT TYPE="BUTTON" VALUE="About..." onClick="QSimpleAX.about()" /> </FORM></pre> <p>A second ActiveX control - the standard Calendar Control - is instantiated</p> <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.</p> <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 /><address><hr /><div align="center"> <table width="100%" cellspacing="0" border="0"><tr class="address"> <td width="30%">Copyright © 2008 <a href="trolltech.html">Trolltech</a></td> <td width="40%" align="center"><a href="trademarks.html">Trademarks</a></td> <td width="30%" align="right"><div align="right">Qt 4.3.4</div></td> </tr></table></div></address></body> </html>