cannon.h

qt开发的一个简单的例程

#ifndef CANNON_H
#define CANNON_H

class QTimer;

#include <qwidget.h>

class CannonField: public QWidget
{
	Q_OBJECT
	public:
		CannonField(QWidget *parent =0 ,const char *name=0);
		int angle() const { return ang; }
		int force() const { return f; }
		bool gameOver() const { return gameEnded; }
		bool isShooting() const;
		QSizePolicy sizePolicy() const;
	public slots:
		void setAngle(int);
		void setForce(int newton);
		void shoot();
		void newTarget();
		void setGameOver();
		void restartGame();
	private slots:
		void moveShot();
	signals:
		void angleChanged(int);
		void forceChanged(int);
		void hit();
		void missed();
		void canShoot(bool);
	protected:
		void paintEvent(QPaintEvent *);
	private:
		void paintShot(QPainter*);
		void paintCannon(QPainter*);
		void paintTarget(QPainter*);
		QRect cannonRect() const;
		QRect shotRect() const;
 		QRect targetRect() const;
	
		int ang;
		int f;

		int timeCount;
		QRect LastShotRect;
		QTimer *autoShootTimer;
		float shoot_ang;
		float shoot_f;
		QPoint target;
		bool gameEnded;
};

#endif  // CANNON_H