[Bug 45899] Tray icons don' t react when you left click or right click on them

[wine-bugs at winehq.org]

https://bugs.winehq.org/show_bug.cgi?id=45899

--- Comment #21 from Konrad Materka <kmaterka at wp.pl> ---
Let me summarize the situation, as I understand it: KDE implements proxy
between xembed and SNI (using xembedsniproxy). Tray icon is rendered off screen
and "duplicated" icon is sent trough SNI (D-Bus) protocol to the KDE system
notification applet. Mouse clicks are not direct but emulated on the top-left
corner of the wine icon. When tray icon has some transparency in top-left
corner and "window region" patch is applied, mouse click is ignored by wine,
probably ends up "clicking through". I don't know why it works with KDE
compositing disabled.

Fix in the KDE will be tricky. The best would be to send mouse clicks where
they occurred, not in the top-left corner, but it is hard to get information
where notification icon is rendered on the KDE notification area.

Maybe region should not be applied on tray icons? Windows 10 is not doing that,
I can click on the transparent space of the icon (or even empty space around
the icon!) and it still receives the event and context menu shows at the
pointer location.

Another solution would be to include this patch:
https://github.com/Tk-Glitch/PKGBUILDS/blob/master/wine-tkg-git/wine-tkg-patches/misc/plasma_systray_fix.patch
It adds SNI / AppIndicator support, so that when available wine will use SNI to
show tray icon. I don't know how reliable the patch is, I never tested it. As a
bonus, it would be compatible with Wayland.

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