<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def width_radius_changed_cb(self, widget, val):
 """Callback executed when the Width radius is changed."""

        self.width_radius = val
        self.redraw_cuts()
        self.replot_all()
        return True