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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 > Two simple TQt widgets (in-process)< / h1 >
The ActiveX controls in this example are simple < a href = "ntqwidget.html" > TQWidget< / a >
subclasses reimplementing the paintEvent() method. The classes use
the Q_CLASSINFO macro to
< p > The example demonstrates the use of the Q_CLASSINFO macro to set
< a href = "activentqt.html#ActiveTQt" > ActiveTQt< / a > -specific attributes for < a href = "ntqobject.html" > TQObject< / a > sub classes, and the use of
the < a href = "qaxfactory.html#TQAXFACTORY_BEGIN" > TQAXFACTORY_BEGIN< / a > , < a href = "qaxfactory.html#TQAXCLASS" > TQAXCLASS< / a > and < a href = "qaxfactory.html#TQAXFACTORY_END" > TQAXFACTORY_END< / a > macros.
< p >
< pre > class TQAxWidget1 : public < a href = "ntqwidget.html" > TQWidget< / a >
{
< a href = "metaobjects.html#Q_OBJECT" > Q_OBJECT< / a >
Q_CLASSINFO("ClassID", "{1D9928BD-4453-4bdd-903D-E525ED17FDE5}")
Q_CLASSINFO("InterfaceID", "{99F6860E-2C5A-42ec-87F2-43396F4BE389}")
Q_CLASSINFO("EventsID", "{0A3E9F27-E4F1-45bb-9E47-63099BCCD0E3}")
< / pre > The class declaration includes the Q_OBJECT macro to activate TQt's < a href = "metaobjects.html#meta-object" > meta object< / a > system, and sets COM identifiers for the class using the
Q_CLASSINFO macro.
< pre > Q_PROPERTY( TQColor fillColor READ fillColor WRITE setFillColor )
public:
TQAxWidget1( < a href = "ntqwidget.html" > TQWidget< / a > *parent = 0, const char *name = 0, WFlags f = 0 )
: < a href = "ntqwidget.html" > TQWidget< / a > ( parent, name, f ), fill_color( red )
{
}
< a href = "ntqcolor.html" > TQColor< / a > fillColor() const
{
return fill_color;
}
void setFillColor( const < a href = "ntqcolor.html" > TQColor< / a > & fc )
{
fill_color = fc;
repaint();
}
protected:
void paintEvent( < a href = "qpaintevent.html" > TQPaintEvent< / a > *e )
{
< a href = "ntqpainter.html" > TQPainter< / a > paint( this );
< a href = "ntqrect.html" > TQRect< / a > r = rect();
< a name = "x2544" > < / a > r.< a href = "ntqrect.html#addCoords" > addCoords< / a > ( 10, 10, -10, -10 );
< a name = "x2543" > < / a > paint.< a href = "ntqpainter.html#fillRect" > fillRect< / a > ( r, fill_color );
}
private:
< a href = "ntqcolor.html" > TQColor< / a > fill_color;
};
< / pre > The control draws a filled rectangle. The fill color is exposed as a
property using the Q_PROPERTY macro.
< p >
< pre > class TQAxWidget2 : public < a href = "ntqwidget.html" > TQWidget< / a >
{
Q_OBJECT
Q_CLASSINFO("ClassID", "{58139D56-6BE9-4b17-937D-1B1EDEDD5B71}")
Q_CLASSINFO("InterfaceID", "{B66280AB-08CC-4dcc-924F-58E6D7975B7D}")
Q_CLASSINFO("EventsID", "{D72BACBA-03C4-4480-B4BB-DE4FE3AA14A0}")
Q_CLASSINFO("ToSuperClass", "TQAxWidget2")
Q_CLASSINFO("StockEvents", "yes")
< / pre > The declaration of the second control class uses the Q_CLASSINFO macro
to set the COM identifiers as well as additional COM attributes for the
class. Objects of that class will not expose the < a href = "ntqwidget.html" > TQWidget< / a > API, and provide
the ActiveX stock events (ie. Click, KeyDown etc.).
< pre > Q_PROPERTY( int lineWidth READ lineWidth WRITE setLineWidth )
public:
TQAxWidget2( < a href = "ntqwidget.html" > TQWidget< / a > *parent = 0, const char *name = 0, WFlags f = 0 )
: < a href = "ntqwidget.html" > TQWidget< / a > ( parent, name, f ), line_width( 1 )
{
}
int lineWidth() const
{
return line_width;
}
void setLineWidth( int lw )
{
line_width = lw;
repaint();
}
protected:
void paintEvent( < a href = "qpaintevent.html" > TQPaintEvent< / a > *e )
{
< a href = "ntqpainter.html" > TQPainter< / a > paint( this );
< a name = "x2546" > < / a > < a href = "ntqpen.html" > TQPen< / a > pen = paint.< a href = "ntqpainter.html#pen" > pen< / a > ();
< a name = "x2548" > < / a > pen.< a href = "ntqpen.html#setWidth" > setWidth< / a > ( line_width );
< a name = "x2547" > < / a > paint.< a href = "ntqpainter.html#setPen" > setPen< / a > ( pen );
< a href = "ntqrect.html" > TQRect< / a > r = rect();
< a name = "x2549" > < / a > r.< a href = "ntqrect.html#addCoords" > addCoords< / a > ( 10, 10, -10, -10 );
< a name = "x2545" > < / a > paint.< a href = "ntqpainter.html#drawEllipse" > drawEllipse< / a > ( r );
}
private:
int line_width;
};
< / pre > The control draws a circle. The line width is exposed as a property
using the Q_PROPERTY macro.
< p > The controls are exposed by the implementation of < a href = "qaxfactory.html" > TQAxFactory< / a > as provided
by the TQAXFACTORY_BEGIN and TQAXFACTORY_END macros.
< pre > #include < < a href = "qaxfactory-h.html" > qaxfactory.h< / a > >
#include "ax1.h"
#include "ax2.h"
TQAXFACTORY_BEGIN("{98DE28B6-6CD3-4e08-B9FA-3D1DB43F1D2F}", "{05828915-AD1C-47ab-AB96-D6AD1E25F0E2}")
< / pre > The factory is initialied using the TQAXFACTORY_BEGIN macro, providing
the IDs for the application and the type library.
< pre > TQAXCLASS(TQAxWidget1)
TQAXCLASS(TQAxWidget2)
< / pre > The classes exposed are listed using the TQAXCLASS macro.
< pre > TQAXFACTORY_END()
< / pre > Finally the factory declaration is closed using the TQAXFACTORY_END
macro.
< 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/multiple< / tt > .
< p > < hr >
< p > The < a href = "qaxserver-demo-multiple.html" > demonstration< / a > requires your
WebBrowser to support ActiveX controls, and scripting to be enabled.
< p >
< pre > < script language=javascript>
function setColor( form )
{
Ax1.fillColor = form.colorEdit.value;
}
function setWidth( form )
{
Ax2.lineWidth = form.widthEdit.value;
}
< /script>
< p>
This is one TQWidget subclass:< br>
< object ID="Ax1" CLASSID="CLSID:1D9928BD-4453-4bdd-903D-E525ED17FDE5"
CODEBASE=http://www.trolltech.com/demos/multipleax.cab>
[Object not available! Did you forget to build and register the server?]
< /object> < br>
< form>
Fill Color: < input type="edit" ID="colorEdit" value = "red">
< input type="button" value = "Set" onClick="setColor(this.form)">
< input type="button" value = "Hide" onClick="Ax1.hide()">
< input type="button" value = "Show" onClick="Ax1.show()">
< /form>
< p>
This is another TQWidget subclass:< br>
< object ID="Ax2" CLASSID="CLSID:58139D56-6BE9-4b17-937D-1B1EDEDD5B71"
CODEBASE=http://www.trolltech.com/demos/multipleax.cab>
[Object not available! Did you forget to build and register the server?]
< /object> < br>
< form>
Line width: < input type="edit" ID="widthEdit" value = "1">
< input type="button" value = "Set" onClick="setWidth(this.form)">
< /form>
< / pre > < p > See also < a href = "qaxserver-examples.html" > The TQAxServer Examples< / a > .
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