Bug 516042 - Opacity settings should only be offered when the theme supports them
Summary: Opacity settings should only be offered when the theme supports them
Status: ASSIGNED
Alias: None
Product: plasmashell
Classification: Plasma
Component: Panel (other bugs)
Version First Reported In: master
Platform: Other Linux
: NOR normal
Target Milestone: 1.0
Assignee: Plasma Bugs List
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2026-02-15 14:46 UTC by Filip Fila
Modified: 2026-02-15 15:15 UTC (History)
1 user (show)

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Description Filip Fila 2026-02-15 14:46:56 UTC 
SUMMARY
If a theme doesn't support setting opacity options, the user is still not prevented from changing them in the panel configuration dialog. This is confusing because the options don't do anything.

STEPS TO REPRODUCE
1. Switch to a theme like Oxygen
2. Go to the panel configuration window and try to change the opacity setting

OBSERVED RESULT
Clicking on the options does nothing and if you visit the dialog again you are defaulted back to translucent

EXPECTED RESULT
The combobox is disabled, preferably with a tooltip explaining why.

SOFTWARE/OS VERSIONS
Operating System: Manjaro Linux 
KDE Plasma Version: 6.6.80
KDE Frameworks Version: 6.24.0
Qt Version: 6.10.1

ADDITIONAL INFORMATION
This is very likely what the misplaced line of code was supposed to do: https://bugs.kde.org/show_bug.cgi?id=515987

I'm submitting a patch in a few minutes.
Comment 1 Bug Janitor Service 2026-02-15 15:15:57 UTC 
A possibly relevant merge request was started @ https://invent.kde.org/plasma/plasma-desktop/-/merge_requests/3542