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183 lines
8.0 KiB
183 lines
8.0 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/simple/simple.doc:45 -->
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<html>
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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>A simple ActiveQt control (executable)</title>
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<style type="text/css"><!--
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fn { margin-left: 1cm; text-indent: -1cm; }
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a:link { color: #004faf; text-decoration: none }
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a:visited { color: #672967; text-decoration: none }
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body { background: #ffffff; color: black; }
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--></style>
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</head>
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<body>
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<table border="0" cellpadding="0" cellspacing="0" width="100%">
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<tr bgcolor="#E5E5E5">
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<td valign=center>
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<a href="index.html">
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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">Annotated</font></a>
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<font color="#004faf">Grouped Classes</font></a>
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<font color="#004faf">Functions</font></a>
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</td>
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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>A simple ActiveQt control (executable)</h1>
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The ActiveX control in this example is a layouted <a href="qwidget.html">QWidget</a>
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with a <a href="qslider.html">QSlider</a>, a <a href="qlcdnumber.html">QLCDNumber</a> and a <a href="qlineedit.html">QLineEdit</a>.
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It provides a signal/slot/property interface to change the
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values of the slider and the line edit, and to get notified
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of any property changes.
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<p> It demonstrates the use of <a href="qaxbindable.html#requestPropertyChange">QAxBindable::requestPropertyChange</a>()
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and <a href="qaxbindable.html#propertyChanged">QAxBindable::propertyChanged</a>(), and the use of the default
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<a href="qaxfactory.html">QAxFactory</a> through the <a href="qaxfactory.html#QAXFACTORY_DEFAULT">QAXFACTORY_DEFAULT</a> macro.
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<p>
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<p> The Qt implementation of the ActiveX for this example is
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<pre> class QSimpleAX : public <a href="qwidget.html">QWidget</a>, public QAxBindable
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{
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<a href="metaobjects.html#Q_OBJECT">Q_OBJECT</a>
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Q_PROPERTY( QString text READ text WRITE setText )
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Q_PROPERTY( int value READ value WRITE setValue )
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public:
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QSimpleAX( <a href="qwidget.html">QWidget</a> *parent = 0, const char *name = 0 )
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: <a href="qwidget.html">QWidget</a>( parent, name )
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{
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<a href="qvboxlayout.html">QVBoxLayout</a> *vbox = new <a href="qvboxlayout.html">QVBoxLayout</a>( this );
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slider = new <a href="qslider.html">QSlider</a>( 0, 100, 1, 0, QSlider::Horizontal, this );
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LCD = new <a href="qlcdnumber.html">QLCDNumber</a>( 3, this );
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edit = new <a href="qlineedit.html">QLineEdit</a>( this );
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<a name="x2528"></a> connect( slider, SIGNAL( <a href="qslider.html#valueChanged">valueChanged</a>( int ) ), this, SLOT( setValue(int) ) );
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<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>&)) );
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vbox-><a href="qboxlayout.html#addWidget">addWidget</a>( slider );
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vbox-><a href="qboxlayout.html#addWidget">addWidget</a>( LCD );
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vbox-><a href="qboxlayout.html#addWidget">addWidget</a>( edit );
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}
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<a href="qstring.html">QString</a> text() const
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{
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<a name="x2522"></a> return edit-><a href="qlineedit.html#text">text</a>();
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}
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int value() const
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{
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<a name="x2527"></a> return slider-><a href="qslider.html#value">value</a>();
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}
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signals:
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void someSignal();
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void valueChanged(int);
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void textChanged(const <a href="qstring.html">QString</a>&);
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public slots:
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void setText( const <a href="qstring.html">QString</a> &string )
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{
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if ( !requestPropertyChange( "text" ) )
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return;
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<a name="x2525"></a> edit-><a href="qobject.html#blockSignals">blockSignals</a>( TRUE );
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<a name="x2521"></a> edit-><a href="qlineedit.html#setText">setText</a>( string );
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edit-><a href="qobject.html#blockSignals">blockSignals</a>( FALSE );
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emit someSignal();
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emit textChanged( string );
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propertyChanged( "text" );
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}
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void about()
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{
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<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"
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"called through ActiveX/OLE automation!" );
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}
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void setValue( int i )
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{
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if ( !requestPropertyChange( "value" ) )
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return;
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slider-><a href="qobject.html#blockSignals">blockSignals</a>( TRUE );
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<a name="x2526"></a> slider-><a href="qslider.html#setValue">setValue</a>( i );
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slider-><a href="qobject.html#blockSignals">blockSignals</a>( FALSE );
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LCD-><a href="qlcdnumber.html#display">display</a>( i );
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emit valueChanged( i );
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propertyChanged( "value" );
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}
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private:
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<a href="qslider.html">QSlider</a> *slider;
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<a href="qlcdnumber.html">QLCDNumber</a> *LCD;
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<a href="qlineedit.html">QLineEdit</a> *edit;
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};
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</pre>
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<p> The control is exported using the default <a href="qaxfactory.html">QAxFactory</a>
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<pre> QAXFACTORY_DEFAULT(QSimpleAX,
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"{DF16845C-92CD-4AAB-A982-EB9840E74669}",
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"{616F620B-91C5-4410-A74E-6B81C76FFFE0}",
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"{E1816BBA-BF5D-4A31-9855-D6BA432055FF}",
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"{EC08F8FC-2754-47AB-8EFE-56A54057F34E}",
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"{A095BA0C-224F-4933-A458-2DD7F6B85D8F}")
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</pre>
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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/simple</tt>.
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<p> <hr>
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<p> The <a href="qaxserver-demo-simple.html">demonstration</a> requires your
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WebBrowser to support ActiveX controls, and scripting to be enabled.
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<p> The simple ActiveX control is embedded using the <tt><object></tt> tag.
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<pre> <object ID="QSimpleAX" CLASSID="CLSID:DF16845C-92CD-4AAB-A982-EB9840E74669"
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CODEBASE=http://www.trolltech.com/demos/simpleax.cab>
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<PARAM NAME="text" VALUE="A simple control">
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<PARAM NAME="value" VALUE="1">
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[Object not available! Did you forget to build and register the server?]
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</object>
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</pre>
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<p> A simple HTML button is connected to the <a href="activeqt.html#ActiveQt">ActiveQt</a>'s about() slot.
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<pre> <FORM>
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<INPUT TYPE="BUTTON" VALUE="About..." onClick="QSimpleAX.about()">
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</FORM>
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</pre>
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<p> A second ActiveX control - the standard Calendar Control - is instantiated
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<pre> <object ID="Calendar" CLASSID="CLSID:8E27C92B-1264-101C-8A2F-040224009C02">
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[Standard Calendar control not available!]
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<PARAM NAME="day" VALUE="1">
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</object>
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</pre>
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<p> Events from the ActiveX controls are handled using both Visual Basic Script
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and JavaScript.
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<pre> <SCRIPT LANGUAGE=VBScript>
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Sub Calendar_Click()
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MsgBox( "Calendar Clicked!" )
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End Sub
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Sub QSimpleAX_TextChanged( str )
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document.title = str
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End Sub
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</SCRIPT>
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<SCRIPT LANGUAGE=JavaScript>
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function QSimpleAX::ValueChanged( Newvalue )
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{
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Calendar.Day = Newvalue;
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}
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</SCRIPT>
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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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</html>
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