Bug 502927

Created attachment 180348 [details]
Dolphin file path with kvantum

SUMMARY
After this merge request: https://invent.kde.org/frameworks/kio/-/merge_requests/1793 the KUrlNavigator widget in Dolphin (and possibly other apps) draws its background using QPainter with a hardcoded call to palette(). This bypasses the QStyle engine and breaks compatibility with third-party styles like Kvantum.

As a result, the text and background become unreadable when using semi-dark themes (light themes with dark toolbars).

This issue has been confirmed by Kvantum's developer in this discussion, where it was explained that Kvantum cannot style elements that are painted manually like this.

https://github.com/tsujan/Kvantum/discussions/1059

STEPS TO REPRODUCE
1. Use any light Kvantum theme with dark toolbars (e.g. KvAdapta, KvMojaveMixed).
2. Launch Dolphin.

OBSERVED RESULT
The path bar uses a bright background that clashes with the theme, making the text hard or impossible to read.

EXPECTED RESULT
KUrlNavigator should use QStyle to draw its background so that it remains styleable.

SOFTWARE/OS VERSIONS
KDE Frameworks Version 6.12+

ADDITIONAL INFORMATION
https://invent.kde.org/frameworks/kio/-/merge_requests/1793
https://github.com/tsujan/Kvantum/issues/1066
https://github.com/tsujan/Kvantum/discussions/1059