controller.h Example File

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 #ifndef CONTROLLER_H
 #define CONTROLLER_H

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

 #define TOP 1
 #define BOTTOM 2
 #define LEFT 3
 #define RIGHT 4

 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);

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

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

     void start();
     void stop();

 private slots:
     void tick();

 private:
     QTimer *timer;
     QTime *elapsed;
     QTime *elapsedPaddle;
     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