board.h Example File

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 #ifndef BOARD_H
 #define BOARD_H

 #include <QObject>
 #include <QGraphicsScene>
 #include <QGraphicsView>
 #include <QGraphicsPixmapItem>
 #include <QPixmap>
 #include <QPropertyAnimation>

 class Board : public QGraphicsView
 {
     Q_OBJECT
     Q_PROPERTY(int connectRotation READ connectRotation WRITE setConnectRotation)
     Q_PROPERTY(qreal connectOpacity READ connectOpacity WRITE setConnectOpacity)
 public:
     explicit Board(QWidget *parent = 0);

     enum Edge {
         Top = 1,
         Bottom,
         Left,
         Right
     };

     enum BoardSize {
         Width = 640,
         Height = 360,
         Paddle = 50
     };

     QGraphicsScene *getScene() {
         return scene;
     }

     int connectRotation(){
         return connectIcon->rotation();
     }

     qreal connectOpacity(){
         return connectIcon->opacity();
     }

     void setConnectRotation(int rot);
     void setConnectOpacity(qreal op);

 signals:
     void ballCollision(Board::Edge pos);
     void scored(Board::Edge pos);

 public slots:
     void setBall(int x, int y);
     void setLeftPaddle(int y);
     void setRightPaddle(int y);
     void setScore(int l, int r);

     void setStatus(QString text, int opacity_start, int opacity_end);

     void sceneChanged(const QList<QRectF> &region);

     void animateConnect(bool start = true);
     void fadeConnect(bool out = true);

 private:
     QGraphicsScene *scene;
     QGraphicsRectItem *ball;
     QGraphicsRectItem *topWall;
     QGraphicsRectItem *bottomWall;
     QGraphicsRectItem *leftPaddle;
     QGraphicsRectItem *rightPaddle;

     QGraphicsTextItem *leftScore;
     QGraphicsTextItem *rightScore;

     QGraphicsTextItem *status;

     QPixmap icon;
     QGraphicsPixmapItem *connectIcon;
     QPropertyAnimation *connectAnimation;

     void checkBall(int x, int y);
 };

 #endif // BOARD_H