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From: healy@spice.cs.cmu.edu (James Healy)
Newsgroups: comp.windows.x
Subject: Re: Window manager geometry updating.
Keywords: Window managers, geometry, reparenting.
Message-ID: <2790@pt.cs.cmu.edu>
Date: 25 Aug 88 17:18:00 GMT
Sender: netnews@pt.cs.cmu.edu
Organization: Carnegie-Mellon University, CS/RI
Lines: 15

Thanks for the responses.  It seems that both twm and awm reparent each
window on the screen with same-size windows underneath the ones you see.
When a titlebar (or other decoration) gets put on a window, the parent
window is extended upward a little bit and the titlebar ornaments get
drawn in this area at the top.

The x and y attributes of the window are reported with respect to this
parent window, not the root window.  Since the parent window always
follows the window you see on the screen, the x and y coordinates never
change. To get the coordinates with respect to the root window, use the
XTranslateCoordinates function.

--Jim Healy.
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