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< title > A simple ActiveTQt 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 ActiveTQt control (executable)< / h1 >
The ActiveX control in this example is a layouted < a href = "ntqwidget.html" > TQWidget< / a >
with a < a href = "ntqslider.html" > TQSlider< / a > , a < a href = "ntqlcdnumber.html" > TQLCDNumber< / a > and a < a href = "ntqlineedit.html" > TQLineEdit< / 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" > TQAxBindable::requestPropertyChange< / a > ()
and < a href = "qaxbindable.html#propertyChanged" > TQAxBindable::propertyChanged< / a > (), and the use of the default
< a href = "qaxfactory.html" > TQAxFactory< / a > through the < a href = "qaxfactory.html#TQAXFACTORY_DEFAULT" > TQAXFACTORY_DEFAULT< / a > macro.
< p >
< p > The TQt implementation of the ActiveX for this example is
< pre > class TQSimpleAX : public < a href = "ntqwidget.html" > TQWidget< / a > , public TQAxBindable
{
< a href = "metaobjects.html#TQ_OBJECT" > TQ_OBJECT< / a >
Q_PROPERTY( TQString text READ text WRITE setText )
Q_PROPERTY( int value READ value WRITE setValue )
public:
TQSimpleAX( < a href = "ntqwidget.html" > TQWidget< / a > *parent = 0, const char *name = 0 )
: < a href = "ntqwidget.html" > TQWidget< / a > ( parent, name )
{
< a href = "qvboxlayout.html" > TQVBoxLayout< / a > *vbox = new < a href = "qvboxlayout.html" > TQVBoxLayout< / a > ( this );
slider = new < a href = "ntqslider.html" > TQSlider< / a > ( 0, 100, 1, 0, TQSlider::Horizontal, this );
LCD = new < a href = "ntqlcdnumber.html" > TQLCDNumber< / a > ( 3, this );
edit = new < a href = "ntqlineedit.html" > TQLineEdit< / a > ( this );
< a name = "x2528" > < / a > connect( slider, SIGNAL( < a href = "ntqslider.html#valueChanged" > valueChanged< / a > ( int ) ), this, SLOT( setValue(int) ) );
< a name = "x2523" > < / a > connect( edit, SIGNAL(< a href = "ntqlineedit.html#textChanged" > textChanged< / a > (const < a href = "ntqstring.html" > TQString< / a > & )), this, SLOT(setText(const < a href = "ntqstring.html" > TQString< / 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 = "ntqstring.html" > TQString< / a > text() const
{
< a name = "x2522" > < / a > return edit-> < a href = "ntqlineedit.html#text" > text< / a > ();
}
int value() const
{
< a name = "x2527" > < / a > return slider-> < a href = "ntqslider.html#value" > value< / a > ();
}
signals:
void someSignal();
void valueChanged(int);
void textChanged(const < a href = "ntqstring.html" > TQString< / a > & );
public slots:
void setText( const < a href = "ntqstring.html" > TQString< / a > & string )
{
if ( !requestPropertyChange( "text" ) )
return;
< a name = "x2525" > < / a > edit-> < a href = "ntqobject.html#blockSignals" > blockSignals< / a > ( TRUE );
< a name = "x2521" > < / a > edit-> < a href = "ntqlineedit.html#setText" > setText< / a > ( string );
edit-> < a href = "ntqobject.html#blockSignals" > blockSignals< / a > ( FALSE );
emit someSignal();
emit textChanged( string );
propertyChanged( "text" );
}
void about()
{
< a name = "x2524" > < / a > TQMessageBox::< a href = "ntqmessagebox.html#information" > information< / a > ( this, "About TQSimpleAX", "This is a TQt widget, and this slot has been\n"
"called through ActiveX/OLE automation!" );
}
void setValue( int i )
{
if ( !requestPropertyChange( "value" ) )
return;
slider-> < a href = "ntqobject.html#blockSignals" > blockSignals< / a > ( TRUE );
< a name = "x2526" > < / a > slider-> < a href = "ntqslider.html#setValue" > setValue< / a > ( i );
slider-> < a href = "ntqobject.html#blockSignals" > blockSignals< / a > ( FALSE );
LCD-> < a href = "ntqlcdnumber.html#display" > display< / a > ( i );
emit valueChanged( i );
propertyChanged( "value" );
}
private:
< a href = "ntqslider.html" > TQSlider< / a > *slider;
< a href = "ntqlcdnumber.html" > TQLCDNumber< / a > *LCD;
< a href = "ntqlineedit.html" > TQLineEdit< / a > *edit;
};
< / pre >
< p > The control is exported using the default < a href = "qaxfactory.html" > TQAxFactory< / a >
< pre > TQAXFACTORY_DEFAULT(TQSimpleAX,
"{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" > TQAxServer< / 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="TQSimpleAX" 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 = "activentqt.html#ActiveTQt" > ActiveTQt< / a > 's about() slot.
< pre > < FORM>
< INPUT TYPE="BUTTON" VALUE="About..." onClick="TQSimpleAX.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 TQSimpleAX_TextChanged( str )
document.title = str
End Sub
< /SCRIPT>
< SCRIPT LANGUAGE=JavaScript>
function TQSimpleAX::ValueChanged( Newvalue )
{
Calendar.Day = Newvalue;
}
< /SCRIPT>
< / pre > < p > See also < a href = "qaxserver-examples.html" > The TQAxServer Examples< / a > .
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