float fact = 33.0F;
    int offset = 23;
    if((event->x() < offset || (this->width() - event->x()) <= offset) ||
       (event->y() < offset || (this->height() - event->y()) <= offset))
        return;
    float x,y;
    int offrest = offset % (int)fact;

    x = ((float)event->x() - offrest)/fact;
    y = ((float)event->y() - offrest)/fact;

    if(x -  floorf(x) >= 0.5F)
       drag.setX((int)ceil(x) * fact + offrest);
    else
       drag.setX((int)floorf(x) * fact  + offrest);

    if(y -  floorf(y) >= 0.5F)
       drag.setY((int)ceil(y) * fact + offrest);
    else
       drag.setY((int)floorf(y) * fact + offrest);