Hi,
I'm the Betterbird maintainer. Betterbird is a fork of Thunderbird.
Unlike Thunderbird, Betterbird can minimise to the system tray, which works fine
on KDE and some other desktops (Gnome, Mate, Xfce) under X11.
Under Wayland, there is a problem described here:
https://github.com/Betterbird/thunderbird-patches/issues/399 or you might skip
to
https://github.com/Betterbird/thunderbird-patches/issues/399#issuecomment-2640984080
It's not a KDE problem, the same happens under Gnome.
Minimise to the system tray works by hiding the application main window and
displaying an icon in the system tray. When the icon is clicked, the application
window is made visible again. Under the covers, that should be the
`gtk_widget_show()` call. All this happens based on the Mozilla code base, so it's
a little hard to dig through layers of Mozilla wrapper code.
The problem is that when the window is restored, it has a "phantom shadow" behind
it and the controls to minimise/maximise/close or more the window are actually not
where they are shown, but on the "phantom shadow" where they are not shown.
Maximising the window and restoring it back to its size fixes the issue.
Our project has e-mail application programmers, not graphic (anomalies)
programmers, so we're totally out of our depth.
KDE folks have helped before when we had issues with the system tray (for example
here https://bugs.kde.org/show_bug.cgi?id=464264), so I'm hoping to get some help
here.
Kind regards, Jörg.
