https://bugs.kde.org/show_bug.cgi?id=448142
Bug ID: 448142
Summary: Overview panel does not repaint
Product: gwenview
Version: 21.08.1
Platform: Other
OS: Other
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: gwenview-bugs-n...@kde.org
Reporter: private_l...@yahoo.com
Target Milestone: ---
Created attachment 145244
--> https://bugs.kde.org/attachment.cgi?id=145244&action=edit
screencast
SUMMARY
Overview of directory with many pictures does not repaint on return from full
view of single picture, if the selection is off the center row. Moving the
mouse within triggers the icons to be repainted one by one. Moving the mouse
out and over the sidebar repaints the whole component.
STEPS TO REPRODUCE
1. open information or folder sidebar
2. open folder with e.g. 100 pictures
3. increase size of preview icon, to show only a few per line
4. scroll down to the middle, so the scroll-pane won't bump into the upper or
lower end
5. click on any picture to show it fullsize, that is not in the center row -
will also place the selection on this icon
6. press ESC on the keyboard and move the mouse around
OBSERVED RESULT
The selected image shall move to the center row and thereby trigger a scroll.
But the repaint is missing. The moving mouse will only repaint piecewise until
the mouse moves out of the overview component to trigger a full repaint.
See attached screencast.
EXPECTED RESULT
The repaint shall leave a consistent state, that does not cause confusion by
"uncovering" the real position of icons piecewise.
SOFTWARE/OS VERSIONS
Betriebssystem: Kubuntu 21.10
KDE-Plasma-Version: 5.22.5
KDE-Frameworks-Version: 5.86.0
Qt-Version: 5.15.2
Kernel-Version: 5.13.0-22-generic (64-bit)
Grafik-Plattform: X11
Prozessoren: 8 × Intel® Core™ i7-4700MQ CPU @ 2.40GHz
Speicher: 15,5 GiB Arbeitsspeicher
Grafikprozessor: Mesa DRI Intel® HD Graphics 4600
ADDITIONAL INFORMATION
The steps to reproduce are not totally reliable. If repeatedly clicking the
same two images first one row above the center and second one row below the
center it might "heal" the error - seemingly some "offscreen-buffer" from
before can be reused and all of a sudden it works as expected.
Also changing to different directories - especially those with fewer images to
not allow scrolling - might "fix" the error.
If the Window-hight interacts badly with the icon-size, clicking images close
to the last row might cause scroll-increments of less than a full icon-hight.
"Uncovering" them with the mouse one-by-one "violates" the grid position and
causes "half-high" cells
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