graphicsscene.h Example File

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 #ifndef __GRAPHICSSCENE__H__
 #define __GRAPHICSSCENE__H__

 //Qt
 #include <QtGui/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__