Qt 4.3: ax2.h Example File (activeqt/multiple/ax2.h)

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# ax2.h Example File
activeqt/multiple/ax2.h

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     #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;
     };

     #endif // AX2_H