submarine.h Example File

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  #ifndef __SUBMARINE__H__
  #define __SUBMARINE__H__

  //Qt
  #include <QtWidgets/QGraphicsTransform>

  #include "pixmapitem.h"

  class Torpedo;

  class SubMarine : public PixmapItem
  {
  Q_OBJECT
  public:
      enum Movement {
         None = 0,
         Left,
         Right
      };
      enum { Type = UserType + 1 };
      SubMarine(int type, const QString &name, int points);

      int points() const;

      void setCurrentDirection(Movement direction);
      enum Movement currentDirection() const;

      void setCurrentSpeed(int speed);
      int currentSpeed() const;

      void launchTorpedo(int speed);
      void destroy();

      int type() const override;

      QGraphicsRotation *rotation() const { return graphicsRotation; }

  signals:
      void subMarineDestroyed();
      void subMarineExecutionFinished();
      void subMarineStateChanged();

  private:
      int subType;
      QString subName;
      int subPoints;
      int speed;
      Movement direction;
      QGraphicsRotation *graphicsRotation;
  };

  #endif //__SUBMARINE__H__