Toolbar darkens when opening menus

[lucazade]

Description:
First of all, thank you so much for your incredible effort on this project!
This LIM is a delightful addition to the Plasma desktop, I truly hope to see it integrated upstream in KDE Plasma in the future.

I've noticed a small graphical inconsistency:
whenever I click to open the integrated menu (e.g., in Kate or other apps), the toolbar darkens immediately.
It seems the window is being treated as "inactive" because the menu popup has taken focus.
This creates a flickering effect or a "dimmed" look while navigating the menu, which is slightly distracting.

Steps to reproduce:

• Open an application with Material Decoration and LIM enabled.
• Click on any menu item (File, Edit, etc.) in the title bar.
• Observe the title bar background color changing to the "inactive" state.

Expected behavior:
The toolbar should ideally remain in its "active" visual state while the user is interacting with its own integrated menu.

Environment:
OS: EndeavourOS
Plasma Version: 6.6.1

Screencast_20260302_073826.webm

[guiodic]

This is something I've been investigating since the beginning. The problem is that the menus are separate windows that are not parented to the decorated one, and there seems to be no way to make them parented. I tried to force them in the past, but this created a crash.

[lucazade]

Thank you for the detailed explanation!
Since this is a known limitation and not something easily fixable, feel free to close this issue.
I'll keep enjoying the LIM anyway, as it's a fantastic feature despite this minor graphical glitch.

Thanks again for your great work and for your time! Ciao

[guiodic]

I'm keeping the bug open to remind me of the issue.

It doesn't bother me much because with the light theme, the switch is not very noticeable.

[paulmcauley]

I think this maybe needs something in kwin to fix ( @zzag ). I'm trying out the development code for this in Klassy and it is quite noticeable with colourschemes that use a full headerbar.