Qt connect

class OGLForm : public QGLWidget
{

public:
    explicit OGLForm(QWidget *parent,int scrn_size_x, int scrn_size_y);
    void draw(int x, int y, GLenum type);

    float ball_posx;
    float ball_posy;
    int ball_r;
    int ssx;
    int ssy;
    QTimer* time1;
    QPoint mouse_point;
    GLuint nomer_disp_spiska_objectov;

protected:
    virtual void initializeGL();
    virtual void resizeGL(int w, int h);
    virtual void paintGL();

    //virtual void mousePressEvent(QMouseEvent * pe);
    virtual void mouseMoveEvent(QMouseEvent * pe);

public slots:
    void alarm();

};

OGLForm::OGLForm(QWidget *parent, int scrn_size_x, int scrn_size_y) :
    QGLWidget(parent)
{
    time1 = new QTimer;
    ssx=scrn_size_x;
    ssy=scrn_size_y;
    ball_posx=ssx/2;
    ball_r=20;
    ball_posy=ssy-ball_r;
    QObject::connect(time1, SIGNAL(QTimer::timeout()),this,SLOT(alarm()));
    time1->start(500);
}

void OGLForm::mouseMoveEvent(QMouseEvent *pe)
{
    mouse_point=pe->pos();
}

void OGLForm::alarm()
{
    ball_posx=mouse_point.x();
    ball_posy=mouse_point.y();
    updateGL();
}