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From: levi@kodak.com (Ilia Levi)
Newsgroups: comp.windows.x
Subject: Extra Expose event from Window Manager
Message-ID: <1673@eastman.UUCP>
Date: 23 Jan 91 21:11:55 GMT
Sender: news@eastman.UUCP
Reply-To: levi@kodak.com (Ilia Levi)
Distribution: na
Organization: Eastman Kodak
Lines: 17


I have a problem with a simple program using Xlib. After setting up the
window, I issue XMapRaised and Xflush. Then I wait for the Expose event with
XNextEvent, and then
use XFillPolygon to draw a rectangle. It works fine if I don't run a window
manager, however with olwm or twm the rectangle does not appear in the window.
If no WM is running, the rectangle is displayed.

However, if using a window manager, I issue another XNextEvent I get another
Expose event, and the rectangle is displayed. Sleep for 1 second instead
of the second XNextEvent also works.

What's going on??? How do I know how many events to wait for? We checked the
count field in the XExpose Event structure, and in every case it is 0.
 
 
Thanks for any clues, Ilia.