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 #ifndef CANNONFIELD_H
 #define CANNONFIELD_H
 
 #include <QWidget>
 
 class CannonField : public QWidget
 {
     Q_OBJECT
 
 public:
     CannonField(QWidget *parent = 0);
 
     int angle() const { return currentAngle; }
 
 public slots:
     void setAngle(int angle);
 
 signals:
     void angleChanged(int newAngle);
 
 protected:
     void paintEvent(QPaintEvent *event);
 
 private:
     int currentAngle;
 };
 
 #endif