Bug 478844

Summary: Floating panel flashing blue line during mouse hover
Product: [Plasma] plasmashell Reporter: feich <gg0n1ne>
Component: PanelAssignee: Plasma Bugs List <plasma-bugs-null>
Status: RESOLVED INTENTIONAL    
Severity: normal CC: 2212363803, nate, niccolo.venerandi
Priority: NOR    
Version First Reported In: 5.27.10   
Target Milestone: 1.0   
Platform: openSUSE   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:
Attachments: Blue line on bottom at panel

Description feich 2023-12-21 16:50:53 UTC
Created attachment 164342 [details]
Blue line on bottom at panel

SUMMARY
***
When "floating panel" and "windows can cover" option are active, when I move cursor on to panel, Flashing blue line  (like mouse hover effect ) at bottom of the panel.
***


STEPS TO REPRODUCE
1. Set panel to floating
2. Select windows can cover option
3. move cursor on to panel. 

OBSERVED RESULT


EXPECTED RESULT


SOFTWARE/OS VERSIONS

Operating System: openSUSE Tumbleweed
KDE Plasma Version: 5.27.10
KDE Frameworks Version: 5.113.0
Qt Version: 5.15.11


ADDITIONAL INFORMATION
Xorg: x11 NVIDIA
Pls check screenshots
Comment 1 Nate Graham 2023-12-21 21:36:32 UTC
That's the screen edge highlight effect; it means that screen edge it considered "active" in some way, in that something will happen when your cursor touches it. The "Windows Can Cover" visibility mode is the cause.
Comment 2 IFtiger 2023-12-22 05:51:56 UTC
me too, 

It seems that clicking on the panel or is about to enter edit mode
Comment 3 feich 2023-12-22 08:21:32 UTC
(In reply to Nate Graham from comment #1)
> That's the screen edge highlight effect; it means that screen edge it
> considered "active" in some way, in that something will happen when your
> cursor touches it. The "Windows Can Cover" visibility mode is the cause.

This seems a little weird. An interesting flash occurs when trying launch application from the panel. 
This is only acceptable when panel is in the background or full-screen applications are active. 
Having this on empty desktop is distracting. We may provide an option to turn off. or we can improve the behavior.
Comment 4 Nate Graham 2024-01-09 22:40:22 UTC
You can turn it off: disable the "Screen Edge" effect in the Desktop Effects page in System Settings.