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# bubble.h Example File
opengl/overpainting/bubble.h

     /****************************************************************************
     **
     ** Copyright (C) 2006-2007 Trolltech ASA. All rights reserved.
     **
     ** 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
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     ** review the following information:
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     #ifndef BUBBLE_H
     #define BUBBLE_H

     #include <QBrush>
     #include <QColor>
     #include <QPointF>
     #include <QRect>
     #include <QRectF>

     class QPainter;

     class Bubble
     {
     public:
         Bubble(const QPointF &position, qreal radius, const QPointF &velocity);

         void drawBubble(QPainter *painter);
         void updateBrush();
         void move(const QRect &bbox);
         QRectF rect();

     private:
         QColor randomColor();

         QBrush brush;
         QPointF position;
         QPointF vel;
         qreal radius;
         QColor innerColor;
         QColor outerColor;
     };

     #endif