SUMMARY The title and the images explain it all. First are the pictures where the Breeze default spacing, background theming and coloring settings are being applied instead of the custom theme's settings. https://imgur.com/a/y1bCXP8 STEPS TO REPRODUCE 1. Install a theme that makes Kickoff transparent (I'm using Ant Dark by Eliver Lara but works on any theme as long as one of these windows is behind it) 2. Try placing non-Qt windows behind Kickoff and see the mismatch OBSERVED RESULT Breeze theming is overriding the theme settings on Kickoff when certain windows are behind. EXPECTED RESULT Kickoff should use and respect the theme design (like the last images) regardless of what window is behind it. It looks really good when it works right (like in Qt windows as you can see in the gallery). SOFTWARE/OS VERSIONS Windows: macOS: (available in the Info Center app, or by running `kinfo` in a terminal window) Linux/KDE Plasma: KDE Plasma Version: 6.5.1 KDE Frameworks Version: 6.19.0 Qt Version: 6.10.0 ADDITIONAL INFORMATION
I think I see what's happening here. It looks like the transparency behind Kickoff goes away when a window touches the panel. This is an on-by-default but optional setting; if you open the panel settings and change "Opacity" to "Transparent", then you'll always see the transparency effect even when a window is touching the panel.
Alright, I think I found the real issue. Turns out that Kickoff opaque mode, no matter if its forced or set to Automatic, applies the Breeze margins on Kickoff itself which look completely different to the theme margins themselves. I even put markings with colored arrows so you can clearly see the difference. You can see that in Opaque mode the margins look too sticked-to-the-borders, like default Breeze. "Opaque mode" shouldn't change the margins the theme uses for Kickoff, it is isually conflicting. I will upload attachments in short. Sorry, right now I have a bad internet connection.
Created attachment 187533 [details] Breeze margins overriding the theme when Kickoff becomes opaque, no matter if opacity is set to automatic or fully opaque, but the thing is that if Kickoff becomes opaque the margins look off
Fascinating! I can reproduce that.