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<title>A simple ActiveQt control (executable)</title>
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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>
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>.
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