[Bug 2527] popup screen flashes information & then becomes blank

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=2527





--- Comment #21 from Jason Edmeades <us at edmeades.me.uk>  2008-05-26 16:11:57 ---
Just a comment but I cant see this being fixed in the short or possibly even
the long term. The first issue I mentioned in the link above, ie move window
not updating the visible region is definitely fixable. BUT it wouldnt help you
- the real problem here is the next bit which shows a big difference between
windows and X. In windows, the createwindow call shows the popup, and its drawn
to immediately. Under wine, the createwindows starts the action of showing the
window, but a redraw is forced when the asynchronous Expose event comes along
which is after the app has finished painting. 

So the application draws to a window which isnt exposed, the expose event
occurs causing a redraw, which the application doesnt handle (as can be seen on
windows by alt-tab away to a window which partially covers it, then back
again).

As per http://article.gmane.org/gmane.comp.emulators.wine.devel/57793 one
solution is to buffer all the drawing which occurs before the first expose
event, but I cannot believe this will be easy to implement and given this
(unless anyone can correct me and indicate how it might be done) I'd guess this
is a border case which will remain unfixed.

Obviously, if the application redraws the popup when asked, the first issue
could be fixed, so although I hate to say it - asking the app provider to fix
that scenario would help a lot here.


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