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# Two simple Qt widgets (in-process)

The ActiveX controls in this example are simple QWidget subclasses reimplementing the paintEvent() method.

It demonstrates the implementation of a QAxFactory to provide multiple ActiveX controls in a single in process ActiveX server, and the use of the QAXFACTORY_EXPORT macro.

        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.addCoords(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.

        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_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.addCoords( 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 <qaxfactory.h>

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

        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/multiple`.

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

This is one QWidget subclass:
Fill Color:

This is another QWidget subclass:
Line width: