cannon.h

我在我的EP9315上写的两个QT程序

#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;}
   QSizePolicy sizePolicy( ) const;

  public slots:
   void setAngle( int degrees );
   void setForce( int newton );
   void shoot ( );
   void newTarget( );
  

  private slots:
   void moveShot( );

  signals:
   void hit();
   void missed();
   void angleChanged( int );
   void forceChanged( int );

  protected:
   void paintEvent( QPaintEvent * );
  private:
   void paintShot( QPainter * );
   void paintTarget( QPainter * );
   void paintCannon( QPainter * );
   QRect cannonRect() const;
   QRect shotRect() const;
   QRect targetRect() const;
   
   int ang; 
   int f;
   
   int timerCount;
   QTimer * autoShootTimer;
   float shoot_ang;
   float shoot_f;

   QPoint target;

};

#endif