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From: davej@sp31.csrd.uiuc.edu (David J. Jablonowski)
Newsgroups: comp.windows.x.motif
Subject: Scrolled Window: Area Size
Keywords: Scrolled Window
Message-ID: <1991Feb19.213852.3289@csrd.uiuc.edu>
Date: 19 Feb 91 21:38:52 GMT
Sender: news@csrd.uiuc.edu (news)
Reply-To: davej@sp31.csrd.uiuc.edu (David J. Jablonowski)
Organization: Center for Supercomputing Research and Development
Lines: 17


   I have a Scrolled WIndow with a scrollingPolicy of AUTOMATIC and a
scrollBarDisplayPolicy of AS_NEEDED. The work area of this Widget is a
Drawing Area. What I need to do is to determine, at arbitrary times, the
exact rectangular regtion of the Drawing Area that is visible thru the
viewing area of the Scrolled Window. This means I need the width and height
of this viewing area as well as the coordinates of the Drawing Area that
appear.

   This is not for refreshing; I am well aware of the Expose Callbackbacks
and the accumulation of Regions.

   Ii seems that I can get close by going thru a bunch of yoga involving
getting the scrollbars, thier dimensions, their values, the size of the
scrolled window itself ..., and doing some calculations. But it seems
I still seems that I am missing some 'margins' or something. Is there
a nice way to determine this info ?