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Article #45

Pixel Coords --> Character Coords

#45
From: Eric Eide
Date: Fri, 24 Jul 1992 17:10
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Please forgive me a FAQ, but I couldn't find an answer in the online Epoch
documentation.

I have a mouse handling package that worked well under Epoch 3.2, but now it
fails under Epoch 4.0.  My problem is that button (and motion) events are now
described with pixel coordinates rather than character coordinates.  What I
need is a function to convert screen pixel coordinates into screen character
coordinates.  Where can I find such a thing, or how can I write one well?

(Alternately, I could use a function that converts a point-and-window value
into screen-relative character coordinates.  Epoch 4.0 provides a function to
turn pixel coordinates into a point and buffer and window.  But I want
character coordinates!)

Thanks for any help.

--
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Eric Eide          |          University of Utah Department of Computer Science
eeide@cs.utah.edu  | Buddhist to hot dog vendor: "Make me one with everything."
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Newsgroups: gnu.epoch.misc
Path: arc1-ca.pugleaf.net!sparky!uunet!caen!hellgate.utah.edu!eeide
From: eeide%asylum.cs.utah.edu@cs.utah.edu (Eric Eide)
Subject: Pixel Coords --> Character Coords
Message-ID: <EEIDE.92Jul24171012@asylum.cs.utah.edu>
Organization: University of Utah Department of Computer Science
Distribution: gnu
Date: 24 Jul 92 17:10:12
Lines: 20