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ax1.h Example File
activeqt/multiple/ax1.h

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 #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;
 };

 #endif // AX1_H