[Bug 10142] Window Management Bug

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=10142





--- Comment #9 from Daniel van Vugt <vanvugt at gmail.com>  2008-03-19 05:59:35 ---
I think I've found the problem, and would like to blame wine and compiz both at
once.

When the window vanishes, I can find it if I noted it's window ID before losing
it and then: xwininfo -id <number>. What I found was that it's invisible
because the window becomes unmapped (state "IsUnMapped" which usually means
minimized) AND it's position has changed to very far left of my left-most
desktop (all corners of the window have negative X locations).

So the window is both minimized and on an impossible desktop. This means it
will never appear in the window list of any desktop I can get to, and will not
appear in the collection of all visible windows (ctrl-alt-up?).

The root cause of this problem clearly lies somewhere in the app itself (which
is closed source) or wine causing the app window to move incorrectly. However I
can easily imagine fixes being implemented in both wine and compiz for
robustness. I think it's clear that some window managers such as metacity
already have such sanity checks built in to stop this from happening.

The simple fix is probably: If all corners of the window have been moved off
all desktops, then recover the window by placing it on the visible desktop and
remapping the window (unminimize).

Admittedly, the window manager is probably the easiest place to implement this
because wine can't know all the details of the window manager. However the root
causing bug which results in the app window moving randomly and wildly is no
doubt in wine's window message (WM_) handling.


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