''

def start_tour(self):

    geo = self.parent.geometry()
    (x, y, width, height) = (geo.x(), geo.y(), geo.width(), geo.height())
    self.step_current = self.last_frame_active
    self.canvas.setFixedSize(width, height)
    self.canvas.move(QPoint(x, y))
    self.canvas.fade_in(self._move_step)
    self._clear_canvas()
    self.is_running = True
