SystemTray on Wayland

[Simon Nash]

My application creates a SystemTray icon as its primary user interface. This has caused issues with some desktops (notably GNOME shell) but so far I have been
able to find workarounds for these issues.

Until now, SystemTray has worked perfectly on Raspberry Pi OS. The latest version of this (based on Debian bookworm) uses Wayland by default instead of X11. The
xwayland apt package is installed. SystemTray is not working in this environment, with SystemTray.isSupported() returning false.

There is a raspi-config option to use X11 instead of Wayland. If I select this and reboot, everything works perfectly as previously. For now, I can tell users
to do this but at some point there will be Linux distros with no option to make this change.

I have searched extensively to try to find out if this is a known issue or limitation and I haven't found anything. There is JDK-8146318 but this is very old
and seems to be a different issue.

Should it be possible to make SystemTray work with the current JDK on Wayland with xwayland by setting some system configuration? (I have tried the latest JDK
23 EA build.) If not, is there any possibility that this could be fixed by a change in the JDK? if not, is there any possibility that the new support in Project
Wakefield for AWT on native Wayland could provide a solution?

Many thanks,
Simon
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