set-clipping-region

Sets the clipping region for the drawing area. The clipping region is a rectangular area to which drawing is restricted. Possible uses for the clipping region are for clipping text or for speeding up redraws when only a known area of the screen is damaged.

See also destroy-clipping-region.

• (send a-wx:canvas set-clipping-region x y width height) -> void
      x : inexact real
      y : inexact real
      width : inexact real
      height : inexact real

  Restrictions on the magnitude of drawing coordinates are described with wx:dc%.