[Bug 31702] Mouselook (raw input) is bound to a box every other click in Guild Wars 2

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=31702

--- Comment #2 from voidcastr <cephryx at gmx.net> 2012-09-16 09:17:34 CDT ---
To reprhase the original bug description a bit:

In the problematic case, the invisible cursor simply seems to move... until it
hits the edge of the screen. It goes invisible when holding down a mouse button
and it properly reappears at the original position in BOTH alternating cases
(the buggy and the correct one) when releasing the button.

Guild Wars 2 does not use raw mouse input all the time, but only when a mouse
button is held down and the mouse is moved. The game basically enters and quits
raw mouse input mode. Thus, there must be some logic within wine's input system
that is triggered when initializing raw input... either this logic or the one
processing an actual "raw mouse move event" malfunctions preceisely every
second time, not causing an expected suppression of the cursor's movement.
Because this suppression always works in the first attempt, I suspect a missing
reset of some variable, some kind of wrong state being set, a missing increment
of a pointer, a lack of removing an event from a queue... or something like
that.

I already had a look into the code but to me it's not easy to identify the part
responsible for this, since I do not know much about wine's input message
processing and it's quite hard to figure it out from scratch / on my own.

-> So... help pls! :)

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