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# cannonfield.h Example File
tutorial/t10/cannonfield.h

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        ** Copyright (C) 2005-2006 Trolltech ASA. All rights reserved.
        **
        ** This file is part of the documentation of the Qt Toolkit.
        **
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        ** 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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        #ifndef CANNONFIELD_H
        #define CANNONFIELD_H

        #include <QWidget>

        class CannonField : public QWidget
        {
            Q_OBJECT

        public:
            CannonField(QWidget *parent = 0);

            int angle() const { return currentAngle; }
            int force() const { return currentForce; }

        public slots:
            void setAngle(int angle);
            void setForce(int force);

        signals:
            void angleChanged(int newAngle);
            void forceChanged(int newForce);

        protected:
            void paintEvent(QPaintEvent *event);

        private:
            QRect cannonRect() const;

            int currentAngle;
            int currentForce;
        };

        #endif