https://bugs.kde.org/show_bug.cgi?id=469625
Bug ID: 469625
Summary: Auto-hiding panels show a glitchy 1px gray line when
sliding in/out
Classification: Plasma
Product: plasmashell
Version: 5.27.4
Platform: openSUSE
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: Panel
Assignee: plasma-b...@kde.org
Reporter: bugs.7n...@aleeas.com
CC: niccolo.venera...@gmail.com
Target Milestone: 1.0
SUMMARY
The slide-in/out animation used for auto-hiding panels has a graphical glitch:
Once the animation starts, a 1px gray line appears right next the panel.
Particularly for dark color schemes (dark plasma on dark application), this
bright color creates an irritating contrast, which in effect makes the sliding
animation look "off"/stuttery.
To illustrate the problem, I attached a screenshot of the first frame of the
auto-hide animation, along with the zero-th frame as a reference.
STEPS TO REPRODUCE
1. Set panel visibility to "Auto Hide"
2. Set color scheme to Breeze Dark
3. Observe the auto-hide animation of the panel
The glitch is best-visible on top of an application with dark background, and
may be easier to spot on a 30Hz resolution or lower. On a high-refresh-rate
display, the animation will look "off" but it will be difficult to explicitly
spot the 1px line.
OBSERVED RESULT
During the auto-hide animation, a 1px gray line appears on the innermost side
of the panel.
EXPECTED RESULT
The panel hiding should be animation without any extra elements appearing.
SOFTWARE/OS VERSIONS
Linux: openSUSE Tumbleweed (also tested Ubuntu 23.04)
KDE Plasma Version: 5.27.4
KDE Frameworks Version: 5.105.0
Qt Version: 5.15.9
Graphics Platform: Wayland
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