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Date: Thu, 3 Oct 1991 22:45:43 PDT
From: email@example.com (Mark Shirley)
I'm trying to write something similar to dw:format-graph-from-root but
with a different layout algorithm. The key element I need is a way to figure
out the bounding box for some text and graphical output before actually
writing those things to the output stream. For instance, I need a "helper"
stream that produces no output, but records the motions of the cursor and the
bounding boxes of graphics calls.
Have you found CONTINUATION-OUTPUT-SIZE? It is a utility that
will return the size parameters (width, height, x-motion,
y-motion, min-x-position, min-y-position) of the output produced
by a given function.
#'(lambda (stream) (write-string "foo