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cannonfield.h Example File
tutorials/tutorial/t14/cannonfield.h

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 ** Copyright (C) 2005-2008 Nokia Corporation and/or its subsidiary(-ies). All rights reserved.
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 ** This file is part of the documentation of the Qt Toolkit.
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 ** contact [email protected] if any conditions of this licensing
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 ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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 #ifndef CANNONFIELD_H
 #define CANNONFIELD_H

 #include <QWidget>

 class QTimer;

 class CannonField : public QWidget
 {
     Q_OBJECT

 public:
     CannonField(QWidget *parent = 0);

     int angle() const { return currentAngle; }
     int force() const { return currentForce; }
     bool gameOver() const { return gameEnded; }
     bool isShooting() const;
     QSize sizeHint() const;

 public slots:
     void setAngle(int angle);
     void setForce(int force);
     void shoot();
     void newTarget();
     void setGameOver();
     void restartGame();

 private slots:
     void moveShot();

 signals:
     void hit();
     void missed();
     void angleChanged(int newAngle);
     void forceChanged(int newForce);
     void canShoot(bool can);

 protected:
     void paintEvent(QPaintEvent *event);
     void mousePressEvent(QMouseEvent *event);
     void mouseMoveEvent(QMouseEvent *event);
     void mouseReleaseEvent(QMouseEvent *event);

 private:
     void paintShot(QPainter &painter);
     void paintTarget(QPainter &painter);
     void paintBarrier(QPainter &painter);
     void paintCannon(QPainter &painter);
     QRect cannonRect() const;
     QRect shotRect() const;
     QRect targetRect() const;
     QRect barrierRect() const;
     bool barrelHit(const QPoint &pos) const;

     int currentAngle;
     int currentForce;

     int timerCount;
     QTimer *autoShootTimer;
     float shootAngle;
     float shootForce;

     QPoint target;

     bool gameEnded;
     bool barrelPressed;
 };

 #endif