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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 Qt widgets (in-process)</h1>

 

The ActiveX controls in this example are simple <a href="qwidget.html">QWidget</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="activeqt.html#ActiveQt">ActiveQt</a>-specific attributes for <a href="qobject.html">QObject</a> sub classes, and the use of
the <a href="qaxfactory.html#QAXFACTORY_BEGIN">QAXFACTORY_BEGIN</a>, <a href="qaxfactory.html#QAXCLASS">QAXCLASS</a> and <a href="qaxfactory.html#QAXFACTORY_END">QAXFACTORY_END</a> macros.
<p> 

<pre>    class QAxWidget1 : public <a href="qwidget.html">QWidget</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 Qt'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( QColor fillColor READ fillColor WRITE setFillColor )
    public:
        QAxWidget1( <a href="qwidget.html">QWidget</a> *parent = 0, const char *name = 0, WFlags f = 0 )
            : <a href="qwidget.html">QWidget</a>( parent, name, f ), fill_color( red )
        {
        }

        <a href="qcolor.html">QColor</a> fillColor() const
        {
            return fill_color;
        }
        void setFillColor( const <a href="qcolor.html">QColor</a> &amp;fc )
        {
            fill_color = fc;
            repaint();
        }

    protected:
        void paintEvent( <a href="qpaintevent.html">QPaintEvent</a> *e )
        {
            <a href="qpainter.html">QPainter</a> paint( this );
            <a href="qrect.html">QRect</a> r = rect();
    <a name="x2544"></a>        r.<a href="qrect.html#addCoords">addCoords</a>( 10, 10, -10, -10 );
    <a name="x2543"></a>        paint.<a href="qpainter.html#fillRect">fillRect</a>( r, fill_color );
        }

    private:
        <a href="qcolor.html">QColor</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 QAxWidget2 : public <a href="qwidget.html">QWidget</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", "QAxWidget2")
        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="qwidget.html">QWidget</a> API, and provide
the ActiveX stock events (ie. Click, KeyDown etc.).
<pre>        Q_PROPERTY( int lineWidth READ lineWidth WRITE setLineWidth )
    public:
        QAxWidget2( <a href="qwidget.html">QWidget</a> *parent = 0, const char *name = 0, WFlags f = 0 )
            : <a href="qwidget.html">QWidget</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">QPaintEvent</a> *e )
        {
            <a href="qpainter.html">QPainter</a> paint( this );
    <a name="x2546"></a>        <a href="qpen.html">QPen</a> pen = paint.<a href="qpainter.html#pen">pen</a>();
    <a name="x2548"></a>        pen.<a href="qpen.html#setWidth">setWidth</a>( line_width );
    <a name="x2547"></a>        paint.<a href="qpainter.html#setPen">setPen</a>( pen );

            <a href="qrect.html">QRect</a> r = rect();
    <a name="x2549"></a>        r.<a href="qrect.html#addCoords">addCoords</a>( 10, 10, -10, -10 );
    <a name="x2545"></a>        paint.<a href="qpainter.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">QAxFactory</a> as provided
by the QAXFACTORY_BEGIN and QAXFACTORY_END macros.


<pre>    #include &lt;<a href="qaxfactory-h.html">qaxfactory.h</a>&gt;

    #include "ax1.h"
    #include "ax2.h"

    QAXFACTORY_BEGIN("{98DE28B6-6CD3-4e08-B9FA-3D1DB43F1D2F}", "{05828915-AD1C-47ab-AB96-D6AD1E25F0E2}")
</pre>The factory is initialied using the QAXFACTORY_BEGIN macro, providing 
the IDs for the application and the type library.
<pre>        QAXCLASS(QAxWidget1)
        QAXCLASS(QAxWidget2)
</pre>The classes exposed are listed using the QAXCLASS macro.
<pre>    QAXFACTORY_END()
</pre>Finally the factory declaration is closed using the QAXFACTORY_END
macro.
<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/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>    &lt;script language=javascript&gt;
    function setColor( form )
    {
        Ax1.fillColor = form.colorEdit.value;
    }

    function setWidth( form )
    {
        Ax2.lineWidth = form.widthEdit.value;
    }
    &lt;/script&gt;

    &lt;p&gt;
    This is one QWidget subclass:&lt;br&gt;
    &lt;object ID="Ax1" CLASSID="CLSID:1D9928BD-4453-4bdd-903D-E525ED17FDE5"
    CODEBASE=http://www.trolltech.com/demos/multipleax.cab&gt;
    [Object not available! Did you forget to build and register the server?]
    &lt;/object&gt;&lt;br&gt;
    &lt;form&gt;
    Fill Color: &lt;input type="edit" ID="colorEdit" value = "red"&gt;
    &lt;input type="button" value = "Set" onClick="setColor(this.form)"&gt;
    &lt;input type="button" value = "Hide" onClick="Ax1.hide()"&gt;
    &lt;input type="button" value = "Show" onClick="Ax1.show()"&gt;
    &lt;/form&gt;

    &lt;p&gt;
    This is another QWidget subclass:&lt;br&gt;
    &lt;object ID="Ax2" CLASSID="CLSID:58139D56-6BE9-4b17-937D-1B1EDEDD5B71"
    CODEBASE=http://www.trolltech.com/demos/multipleax.cab&gt;
    [Object not available! Did you forget to build and register the server?]
    &lt;/object&gt;&lt;br&gt;
    &lt;form&gt;
    Line width: &lt;input type="edit" ID="widthEdit" value = "1"&gt;
    &lt;input type="button" value = "Set" onClick="setWidth(this.form)"&gt;
    &lt;/form&gt;
</pre><p>See also <a href="qaxserver-examples.html">The QAxServer Examples</a>.

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