graphicsscene.h Example File

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  #ifndef __GRAPHICSSCENE__H__
  #define __GRAPHICSSCENE__H__

  //Qt
  #include <QtWidgets/QGraphicsScene>
  #include <QtCore/QSet>
  #include <QtCore/QState>

  class Boat;
  class SubMarine;
  class Torpedo;
  class Bomb;
  class PixmapItem;
  class ProgressItem;
  class TextInformationItem;
  class QAction;

  class GraphicsScene : public QGraphicsScene
  {
  Q_OBJECT
  public:
      enum Mode {
          Big = 0,
          Small
      };

      struct SubmarineDescription {
          int type;
          int points;
          QString name;
      };

      struct LevelDescription {
          int id;
          QString name;
          QList<QPair<int,int> > submarines;
      };

      GraphicsScene(int x, int y, int width, int height, Mode mode = Big);
      qreal sealLevel() const;
      void setupScene(QAction *newAction, QAction *quitAction);
      void addItem(Bomb *bomb);
      void addItem(Torpedo *torpedo);
      void addItem(SubMarine *submarine);
      void addItem(QGraphicsItem *item);
      void clearScene();

  signals:
      void subMarineDestroyed(int);
      void allSubMarineDestroyed(int);

  private slots:
      void onBombExecutionFinished();
      void onTorpedoExecutionFinished();
      void onSubMarineExecutionFinished();

  private:
      Mode mode;
      ProgressItem *progressItem;
      TextInformationItem *textInformationItem;
      Boat *boat;
      QSet<SubMarine *> submarines;
      QSet<Bomb *> bombs;
      QSet<Torpedo *> torpedos;
      QVector<SubmarineDescription> submarinesData;
      QHash<int, LevelDescription> levelsData;

      friend class PauseState;
      friend class PlayState;
      friend class LevelState;
      friend class LostState;
      friend class WinState;
      friend class WinTransition;
      friend class UpdateScoreTransition;
  };

  #endif //__GRAPHICSSCENE__H__