controller.h Example File

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 #ifndef CONTROLLER_H
 #define CONTROLLER_H

 #include <QObject>
 #include <QTimer>
 #include <QTime>
 #include "board.h"

 class Controller : public QObject
 {
     Q_OBJECT
 public:
     explicit Controller(QObject *parent = 0);

 signals:
     void moveBall(int x, int y);
     void score(int left, int right);
     void fps(const QString &str);

 public slots:
     void ballCollision(Board::Edge pos);
     void scored(Board::Edge pos);
     void resetBoard();
     void refresh();

     void moveLeftPaddle(int y);
     void moveRightPaddle(int y);

     void tick();

     void start();
     void stop();

 private:
     QTimer *timer;
     QTime *elapsed;
     QTime *fpscntr;
     int frames;
     int ball_x;
     int speed_x;
     int ball_y;
     int speed_y;
     int score_left;
     int score_right;
     int col_x;
     int col_y;

     int rightPaddleForce;
     int leftPaddleForce;
     int rightPaddleLast;
     int leftPaddleLast;
     int rightPowerUp;
     int leftPowerUp;

     void restart_ball();

 };

 #endif // CONTROLLER_H