Home · All Classes · Main Classes · Grouped Classes · Modules · Functions

cannonfield.h Example File
^{tutorial/t14/cannonfield.h}

 /****************************************************************************
 **
 ** Copyright (C) 2005-2007 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
 ** General Public Licensing requirements will be met:
 ** http://www.trolltech.com/products/qt/opensource.html
 **
 ** If you are unsure which license is appropriate for your use, please
 ** review the following information:
 ** http://www.trolltech.com/products/qt/licensing.html or contact the
 ** sales department at [email protected].
 **
 ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
 ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 **
 ****************************************************************************/

 #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