Qt tutorial - t10/cannon.h

# Source code for tutorial 10: cannon.h

    /****************************************************************
    **
    ** Definition of CannonField class, Qt tutorial 10
    **
    ****************************************************************/

    #ifndef CANNON_H
    #define CANNON_H

    #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; }
    public slots:
        void  setAngle( int degrees );
        void  setForce( int newton );
    signals:
        void  angleChanged( int );
        void  forceChanged( int );
    protected:
        void  paintEvent( QPaintEvent * );
    private:
        void  paintCannon( QPainter * );
        QRect cannonRect() const;

        int ang;
        int f;
    };

    #endif // CANNON_H