Created attachment 137030 [details] system settings video SUMMARY Scroll bar arrow buttons does not highlight on hover in some applications like system settings, discover, plasma system monitor etc, while they are highlighted in blue color in dolphin. Please see the attached video. STEPS TO REPRODUCE 1. enable scroll bar arrow buttons in settings 2. In system settings hover over the scroll bar arrow buttons & click them 3. OBSERVED RESULT the scroll bar arrow buttons are not highlighted. EXPECTED RESULT the scroll bar arrow buttons are highlighted in blue color. SOFTWARE/OS VERSIONS Operating System: KDE neon 5.21 KDE Plasma Version: 5.21.3 KDE Frameworks Version: 5.80.0 Qt Version: 5.15.2 Kernel Version: 5.4.0-67-generic OS Type: 64-bit Graphics Platform: X11 Processors: 4 × Intel® Core™ i3-5010U CPU @ 2.10GHz Memory: 3.8 GiB of RAM Graphics Processor: Mesa Intel® HD Graphics 5500 ADDITIONAL INFORMATION
A possibly relevant merge request was started @ https://invent.kde.org/plasma/breeze/-/merge_requests/121
Git commit b792ea06cf74d638650fcdc73401578f90d0a527 by Jan Blackquill. Committed on 10/08/2021 at 19:48. Pushed by cblack into branch 'master'. kstyle: consider activeSubControls when deciding arrow colour This fixes hover colours in qqc2-desktop-style, which has no widget for us to poke at, so we have to use activeSubControls instead, which we do have, regardless of whether or not there's a widget. M +11 -0 kstyle/breezestyle.cpp https://invent.kde.org/plasma/breeze/commit/b792ea06cf74d638650fcdc73401578f90d0a527
Git commit 37f43577ee2b1a095a6791c9dd7d2f6a3dfa7852 by Jan Blackquill. Committed on 10/08/2021 at 20:21. Pushed by cblack into branch 'Plasma/5.22'. kstyle: consider activeSubControls when deciding arrow colour This fixes hover colours in qqc2-desktop-style, which has no widget for us to poke at, so we have to use activeSubControls instead, which we do have, regardless of whether or not there's a widget. M +11 -0 kstyle/breezestyle.cpp https://invent.kde.org/plasma/breeze/commit/37f43577ee2b1a095a6791c9dd7d2f6a3dfa7852
This fix isn't quite the same. On normal Qt widget apps the scrollbar highlights when that scrollarea is active, not just on hover. In QCC2 the scollbar only highlights on hover.
That's not related to the issue being fixed here.