Path: utzoo!utgpu!water!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!bloom-beacon!TUB.BITNET!net
From: net@TUB.BITNET (Oliver Laumann)
Newsgroups: comp.windows.x
Subject: Bug?
Message-ID: <8805291924.AA16344@tub.UUCP>
Date: 29 May 88 19:24:18 GMT
Sender: daemon@bloom-beacon.MIT.EDU
Organization: The Internet
Lines: 51

Maybe I'm just dumb today, but it seems the result returned by
XGetWindowAttributes() is not deterministic.

The small program attached to this letter demonstrates the problem.
After having invoked the program under uwm, I position the window
to a non-zero x-coordinate (say, 600).  The printf near the end of
the program sometimes (one out of ten times) prints the old x value
(600 in this case), although the window has been repositioned by
the call to XConfigureWindow().

I'm using X Windows Version 11 Release 2; the server is running on
a Sun 3/50 and the client on a Sun 3/260.

Here is the offending program:

#include <X11/X.h>
#include <X11/Xlib.h>

main () $
    Display *d;
    Window w;
    XSetWindowAttributes swa;
    XWindowChanges wc;
    XWindowAttributes wa;
    XEvent e;

    if ((d = XOpenDisplay ((char *)0)) == 0)
        exit (1);
    swa.background_pixel = WhitePixel (d, DefaultScreen (d));
    swa.border_pixel = BlackPixel (d, DefaultScreen (d));
    swa.event_mask = ExposureMask|EnterWindowMask|LeaveWindowMask;
    w = XCreateWindow (d, DefaultRootWindow (d), 0, 0, 400, 400, 2,
        CopyFromParent, CopyFromParent, CopyFromParent,
        CWBackPixel|CWBorderPixel|CWEventMask, &swa);
    XMapWindow (d, w);
    do $
        XNextEvent (d, &e);
     while (e.type != Expose);
    wc.x = 0;
    XConfigureWindow (d, w, CWX, &wc);
    XGetWindowAttributes (d, w, &wa);
    printf ("x = %d\n", wa.x);
    pause ();


Thanks in advance for any help.
--
Regards,
    Oliver Laumann, Technical University of Berlin, Germany.
    ...!pyramid!tub!net   or   net@TUB.BITNET
    ...!mcvax!unido!tub!net