[okular] [Bug 441676] New: Resizing the left panel is jerky

[Manuel Geißer]

https://bugs.kde.org/show_bug.cgi?id=441676

            Bug ID: 441676
           Summary: Resizing the left panel is jerky
           Product: okular
           Version: 21.08.0
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: okular-devel at kde.org
          Reporter: geisserml at gmail.com
  Target Milestone: ---

SUMMARY
In case you haven't noticed yet, resizing the left panel of Okular (which
contains preview images, annotations, bookmarks, the outline, and layers) is
super laggy since quite some time, I believe at least since two stable
releases.

STEPS TO REPRODUCE
1. Open Okular, ideally with a PDF file.
2. Expand the left panel (F7), in case it is currently hidden
3. Try to resize the panel.

OBSERVED RESULT
Resizing the panel is jerky.

EXPECTED RESULT
The panel should resize smoothly, like any other panel does.

SOFTWARE/OS VERSIONS
Operating System: KDE neon 5.22
KDE Plasma Version: 5.22.4
KDE Frameworks Version: 5.85.0
Qt Version: 5.15.3
Kernel Version: 5.11.0-27-generic (64-bit)
Graphics Platform: Wayland
Processors: 4 × Intel® Core™ i5-3570K CPU @ 3.40GHz
Memory: 7.2 GiB of RAM
Graphics Processor: Mesa DRI Intel® HD Graphics 4000

ADDITIONAL INFORMATION
I'm surprised that apparently no one has noticed the issue yet? It's super
obvious.

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