[mcclim-devel] :clipping-region woes

Christophe Rhodes csr21 at cantab.net
Wed Jul 8 15:39:48 UTC 2009

Sumant Oemrawsingh <soemraws at xs4all.nl> writes:

> (with-room-for-graphics (t)
>   (draw-rectangle* *standard-output* -10 -10 10 10
>                    :clipping-region (make-rectangle* -5 -5 5 5)))
> What I expect is that it displays a smaller rectangle, namely the rectangle
> with side 20 clipped down to a side of 10. However, I don't see anything.

Without looking at the code, my suspicion is that the
with-room-for-graphics is at fault -- or at least, it's not
transforming the clipping region.

  (draw-rectangle* *standard-output* 90 90 100 100 
                   :clipping-region (make-rectangle* 95 95 120 120))
at the Listener gives me a 5-pixel rectangle, as one might expect.

So clipping works at least partially; I don't know exactly what is at



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