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# Multiple Example (ActiveQt)

Files:

- activeqt/multiple/ax1.h
- activeqt/multiple/ax2.h
- activeqt/multiple/main.cpp

The Multiple example demonstrates the implementation of a QAxFactory to provide multiple ActiveX controls in a single in process ActiveX server using the `QAXFACTORY_EXPORT()` macro. The ActiveX controls in this example are simple QWidget subclasses that reimplement QWidget::paintEvent().

     ** This file is part of the example classes of the Qt Toolkit.
     **
     ** This file may be used under the terms of the GNU General Public
     ** License version 2.0 as published by the Free Software Foundation
     ** and appearing in the file LICENSE.GPL included in the packaging of
     ** this file.  Please review the following information to ensure GNU
     ** General Public Licensing requirements will be met:
     ** http://trolltech.com/products/qt/licenses/licensing/opensource/
     **
     ** If you are unsure which license is appropriate for your use, please
     ** review the following information:
     ** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
     ** or contact the sales department at sales@trolltech.com.
     **
     ** In addition, as a special exception, Trolltech gives you certain
     ** additional rights. These rights are described in the Trolltech GPL
     ** Exception version 1.0, which can be found at
     ** http://www.trolltech.com/products/qt/gplexception/ and in the file
     ** GPL_EXCEPTION.txt in this package.
     **
     ** In addition, as a special exception, Trolltech, as the sole copyright
     ** holder for Qt Designer, grants users of the Qt/Eclipse Integration
     ** plug-in the right for the Qt/Eclipse Integration to link to
     ** functionality provided by Qt Designer and its related libraries.
     **
     ** Trolltech reserves all rights not expressly granted herein.
     **
     ** Trolltech ASA (c) 2007
     **
     ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
     ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
     **
     ****************************************************************************/

     #ifndef AX1_H
     #define AX1_H

     #include <QWidget>
     #include <QPainter>

     class QAxWidget1 : public QWidget
     {
         Q_OBJECT
         Q_CLASSINFO("ClassID", "{1D9928BD-4453-4bdd-903D-E525ED17FDE5}")
         Q_CLASSINFO("InterfaceID", "{99F6860E-2C5A-42ec-87F2-43396F4BE389}")
         Q_CLASSINFO("EventsID", "{0A3E9F27-E4F1-45bb-9E47-63099BCCD0E3}")

         Q_PROPERTY(QColor fillColor READ fillColor WRITE setFillColor)
     public:
         QAxWidget1(QWidget *parent = 0)
             : QWidget(parent), fill_color(Qt::red)
         {
         }

         QColor fillColor() const
         {
             return fill_color;
         }
         void setFillColor(const QColor &fc)
         {
             fill_color = fc;
             repaint();
         }

     protected:
         void paintEvent(QPaintEvent *e)
         {
             QPainter paint(this);
             QRect r = rect();
             r.adjust(10, 10, -10, -10);
             paint.fillRect(r, fill_color);
         }

     private:
         QColor fill_color;
     };

The first control draws a filled rectangle. The fill color is exposed as a property. `Q_CLASSINFO()` is used to specify the COM identifiers.

     ** This file is part of the example classes of the Qt Toolkit.
     **
     ** This file may be used under the terms of the GNU General Public
     ** License version 2.0 as published by the Free Software Foundation
     ** and appearing in the file LICENSE.GPL included in the packaging of
     ** this file.  Please review the following information to ensure GNU
     ** General Public Licensing requirements will be met:
     ** http://trolltech.com/products/qt/licenses/licensing/opensource/
     **
     ** If you are unsure which license is appropriate for your use, please
     ** review the following information:
     ** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
     ** or contact the sales department at sales@trolltech.com.
     **
     ** In addition, as a special exception, Trolltech gives you certain
     ** additional rights. These rights are described in the Trolltech GPL
     ** Exception version 1.0, which can be found at
     ** http://www.trolltech.com/products/qt/gplexception/ and in the file
     ** GPL_EXCEPTION.txt in this package.
     **
     ** In addition, as a special exception, Trolltech, as the sole copyright
     ** holder for Qt Designer, grants users of the Qt/Eclipse Integration
     ** plug-in the right for the Qt/Eclipse Integration to link to
     ** functionality provided by Qt Designer and its related libraries.
     **
     ** Trolltech reserves all rights not expressly granted herein.
     **
     ** Trolltech ASA (c) 2007
     **
     ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
     ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
     **
     ****************************************************************************/

     #ifndef AX2_H
     #define AX2_H

     #include <QWidget>
     #include <QPainter>

     class QAxWidget2 : public QWidget
     {
         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")
         Q_CLASSINFO("Insertable", "yes")

         Q_PROPERTY( int lineWidth READ lineWidth WRITE setLineWidth )
     public:
         QAxWidget2(QWidget *parent = 0)
             : QWidget(parent), line_width( 1 )
         {
         }

         int lineWidth() const
         {
             return line_width;
         }
         void setLineWidth( int lw )
         {
             line_width = lw;
             repaint();
         }

     protected:
         void paintEvent( QPaintEvent *e )
         {
             QPainter paint( this );
             QPen pen = paint.pen();
             pen.setWidth( line_width );
             paint.setPen( pen );

             QRect r = rect();
             r.adjust( 10, 10, -10, -10 );
             paint.drawEllipse( r );
         }

     private:
         int line_width;
     };

The second control draws a circle. The linewith is exposed as a property. `Q_CLASSINFO()` is used to specify the COM identifiers, and to set the attributes ToSuperClass and StockEvents to expose only the API of the class itself, and to add COM stock events to the ActiveX control.

     #include "ax1.h"
     #include "ax2.h"
     #include <QAxFactory>

     QAXFACTORY_BEGIN("{98DE28B6-6CD3-4e08-B9FA-3D1DB43F1D2F}", "{05828915-AD1C-47ab-AB96-D6AD1E25F0E2}")
         QAXCLASS(QAxWidget1)
         QAXCLASS(QAxWidget2)
     QAXFACTORY_END()

The classes are exported from the server using the QAxFactory macros.

To build the example you must first build the QAxServer library. Then run `qmake` and your make tool in `examples/activeqt/multiple`.

The demonstration requires your WebBrowser to support ActiveX controls, and scripting to be enabled.

     <script language="javascript">
     function setColor( form )
     {
         Ax1.fillColor = form.colorEdit.value;
     }

     function setWidth( form )
     {
         Ax2.lineWidth = form.widthEdit.value;
     }
     </script>

     <p />
     This is one QWidget 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 QWidget 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>