Newsgroups: comp.windows.x
Path: utzoo!utgpu!watserv1!watcgl!mimperatore
From: mimperatore@watcgl.waterloo.edu (Marco Imperatore)
Subject: Re: Invisible foreground
Message-ID: <1990Jun8.002651.14002@watcgl.waterloo.edu>
Keywords: Background is visible, not foreground
Organization: University of Waterloo
References: <2687@ektools.UUCP>
Date: Fri, 8 Jun 90 00:26:51 GMT
Lines: 20

In article <2687@ektools.UUCP> Joanne writes:
>I have been struggling with an annoying problem in getting anything in
>my windows to display with X.  I am writing an application program which
>writes objects to a pixmap.  I then attempt an XCopyArea from the pixmap
>to the window, followed by a MapRaised of the window.  It seems that
>only the background is visible.  I cannot get the foreground visible at
>all.

I had similar problems when I was first learning X (not that I know it now!!).
I think the problem is that you must FIRST map the window and THEN try to
display objects on it.  Furthermore, I think it is a sound idea (if not
entirely necessary) to wait for the Expose event associated with the mapping
of the window before proceeding to draw anything.

-cheers
-- 
Marco Imperatore
Computer Graphics Lab, University of Waterloo, Waterloo, Ontario, Canada
cdn: mimperatore@cgl.waterloo
uucp: mimperatore@watcgl