It is nota new issue but I realize that it works for another user in the same laptop and get a hope.
Normally, whirling the mouse wheel on the indicator raises or lowers the app-level volume. In some point, it spotted working. At first I thought it is either an appindicator or an app problem, since other indicators are giving response to mousewheel events. As I said, however, it works for another user in my computer with plasma desktop.
I tried to remove panel and reset my user files, such as kdeglobal, *rc, etc. I even try to replace some files with the second user’s ones that I thought related.
By the way, it was not the only issue with radiotray indicator. The other issue seems fixed after I installed libayatana-appindicator. It was only a trial-error thing.
Is there a way to fix or at least inquire the issue?
Radiotray-NG: v0.2.8-dev (v0.2.7-6-g1f6e18b)
OS: Manjaro 20.1 Mikah
Kernel: x86_64 Linux 5.8.6-1-MANJARO
DE: KDE 5.73.0 / Plasma 5.19.5
edit: I tried to remove the app and purge all radiotray* files, and reinstall it. It creates a radiotray-ng.desktop file under /etc/xdg/autostart folder and autostarts with system. Interesting things occur then. If it autostarts with the system its tray icon responds to mousewheel and volume changes, however, middle-click pause-play stops working. If I quit the app and restart it from its launcher, mousewheel stops and middle-click play-pause works. I am only a curious cat now, how it works, how kde works, etc