Bug 500485

Summary:	Flatpak programs can't use Oxygen and Plastic application themes.
Product:	[Frameworks and Libraries] flatpak-platform-plugin	Reporter:	nope1000000
Component:	general	Assignee:	Jan Grulich <jgrulich>
Status:	REPORTED ---
Severity:	normal
Priority:	NOR
Version First Reported In:	unspecified
Target Milestone:	---
Platform:	Other
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description nope1000000 2025-02-20 20:54:01 UTC

SUMMARY

If you set your application theme to Oxygen or Plastic in preferences, flatpak programs will still use the default Breeze theme. This is because flatpak apps can't see the installed qt themes in the system, and only can use themes installed as flatpak. At the moment the only themes that flatpak programs can use are Breeze, Windows, and Fusion.


STEPS TO REPRODUCE
1. Set oxygen or plastic theme in preferences
2. Open a qt flatpak app

OBSERVED RESULT
Default breeze theme is used

EXPECTED RESULT
Flatpak apps using the theme configured in preferences, same as the system installed programs, so they look integrated with the rest of the system.


ADDITIONAL INFORMATION

Another solution may be to create separate flatpak packages for Oxygen and Plastic. Or allow the KDE runtime to use system installed themes.

Comment 1 nope1000000 2025-02-21 08:06:31 UTC

Just to correct my bad writing  in the "Additional Information part". I´d just like to clarify that the expected solution would be to include the plastic and oxygen themes in the KDE flatpak runtime. But another possible solutions would be to create separate flatpak packages for Oxygen and Plastic. Or allow the KDE runtime to use system installed themes.