https://bugs.kde.org/show_bug.cgi?id=490951
Bug ID: 490951
Summary: Title bar divider doesn't render on some windows.
Classification: Plasma
Product: Breeze
Version: 6.1.3
Platform: Fedora RPMs
URL: https://discuss.kde.org/t/why-is-the-titlebar-content-
division-line-a-feature-of-mainwindow-rather-than-kwin
s-breeze-decoration/18412?u=rokejulianlockhart
OS: Linux
Status: REPORTED
Severity: minor
Priority: NOR
Component: window decoration
Assignee: plasma-b...@kde.org
Reporter: 4wy78...@rokejulianlockhart.addy.io
CC: kwin-bugs-n...@kde.org, uhh...@gmail.com
Target Milestone: ---
SUMMARY
The title bar divider doesn't render on some windows. It should, considering
that https://bugs.kde.org/show_bug.cgi?id=455248#c0 has now been implemented by
default. Otherwise, as the attached image demonstrates, the title bars are both
difficult to separate from the content despite usually being differently
coloured (so they're not seamless anyway, as if they were imitating GNOME's
CSD) nor are they visually distinct, in a manner consistent with that new
border.
STEPS TO REPRODUCE
> ```Py
> #!/usr/bin/env python
> import sys
> from PyQt6.QtWidgets import QApplication, QMainWindow
>
> app = QApplication(sys.argv)
> window = QMainWindow()
> window.show()
> app.exec()
> ```
...produces a border, whereas:
> ```Py
> #!/usr/bin/env python
> import sys
> from PyQt6.QtWidgets import QApplication, QWidget
>
> app = QApplication(sys.argv)
> window = QWidget()
> window.show()
> app.exec()
> ```
...does not.
OBSERVED RESULT
It doesn't render in Discover, Steam, or any of the PlasmaShell Plasmoids
(attached to panels) with the `noborderrule=2` KWin rule enabled.
EXPECTED RESULT
It should render on all windows, since all windows now have a 1 px outline.
SOFTWARE/OS VERSIONS
Operating System: Fedora Linux 40
KDE Plasma Version: 6.1.3
KDE Frameworks Version: 6.4.0
Qt Version: 6.7.2
Kernel Version: 6.9.11-200.fc40.x86_64 (64-bit)
Graphics Platform: X11
Processors: 12 × AMD Ryzen 5 7600X 6-Core Processor
Memory: 30.5 GiB of RAM
Graphics Processor: AMD Radeon RX 5700
Manufacturer: ASRock
Product Name: X670E Taichi
ADDITIONAL INFORMATION
Render the title bar separator in KWin (not QMainWindow). Ideally, this should
be controlled using a boolean dependent upon whether the colour intensity
setting implemented with https://bugs.kde.org/show_bug.cgi?id=465948#c0 is
"Off" or not, rather than individual application opt-in.
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