# File gtk/sample/gtk-demo/cairo-line-join.rb, line 19
    def draw(cr)
      cr.set_line_width(0.16)
      
      cr.move_to(0.3, 0.33)
      cr.rel_line_to(0.2, -0.2)
      cr.rel_line_to(0.2, 0.2)
      cr.set_line_join(Cairo::LINE_JOIN_MITER) # default
      cr.stroke
      
      cr.move_to(0.3, 0.63)
      cr.rel_line_to(0.2, -0.2)
      cr.rel_line_to(0.2, 0.2)
      cr.set_line_join(Cairo::LINE_JOIN_BEVEL)
      cr.stroke
      
      cr.move_to(0.3, 0.93)
      cr.rel_line_to(0.2, -0.2)
      cr.rel_line_to(0.2, 0.2)
      cr.set_line_join(Cairo::LINE_JOIN_ROUND)
      cr.stroke
    end