def set_viewbox(self, x, y, w, h):
        """Sets the origin and size of the viewbox, describing a virtual view area.

        Args:
            x (int): x coordinate of the viewbox origin
            y (int): y coordinate of the viewbox origin
            w (int): width of the viewbox
            h (int): height of the viewbox
        """
        self.attributes['viewBox'] = "%s %s %s %s" % (x, y, w, h)
        self.attributes['preserveAspectRatio'] = 'none'
Sets the origin and size of the viewbox, describing a virtual view area.

        Args:
            x (int): x coordinate of the viewbox origin
            y (int): y coordinate of the viewbox origin
            w (int): width of the viewbox
            h (int): height of the viewbox