XnViewMP Does Not Obey KDE System Theme

[rhinjard]

I am using Debian 12 KDE and latest version of XnViewMP. I've installed the app using the tgz folder.

Issue: The application doesn't obey the KDE Plasma Breeze theme.

Versions: XnViewMP 1.5.5, KDE Plasma 5.27.5, KDE Frameworks 5.103.0, QT 5.15.8

Using

Code: Select all

export QT_QPA_PLATFORMTHEME="kde"

in xnview.sh only restored the Breeze theme color. But other elements like font settings, gui styles are not applied.

Any idea how do I enable the KDE's breeze theme in XnViewMP?