https://bugs.kde.org/show_bug.cgi?id=452308

            Bug ID: 452308
           Summary: Desktop layout in wallpaper config changes as window
                    is moved
           Product: plasmashell
           Version: 5.24.4
          Platform: Neon Packages
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: Desktop Containment
          Assignee: plasma-b...@kde.org
          Reporter: philipp.verpo...@secure.mailbox.org
                CC: notm...@gmail.com
  Target Milestone: 1.0

Created attachment 147988
  --> https://bugs.kde.org/attachment.cgi?id=147988&action=edit
Screenshot #1

Apologies in advance in case I filed this bug in the wrong place, in which case
I appreciate your help in correcting this.

SUMMARY
In KDE Plasma, the wallpaper of a screen can be modified by right-clicking on
the empty desktop, selecting "Configure Desktop and Wallpaper" from the context
menu, and then choosing a new wallpaper to use as a background image for that
particular screen.

Apparently, a new feature (as of 5.24.4?) seems to be that the layout of the
thumbnails of all available wallpaper images is now determined by the size of
the respective screen. The size of the screen is however not determined by the
properties of the screen whose wallpaper is being edited but rather by the
properties of the screen that the "Configure Desktop and Wallpaper" is placed
on. This does not affect which screen gets edited though.

Attached are two screenshots from the same window, where in the second
screenshot, the size/layout of the thumbnails updated in that moment where the
window was dragged across the border between the two screens such that the
centre of the window is now on the new screen.

Essentially, this bug occurs because the ratio/properties of the screen taken
to display the thumbnails was not obtianed from the screen that is being edited
but rather from the screen of the window.


STEPS TO REPRODUCE
1. Have at least two monitors of dissimilar aspect ratios/resolutions.
2. Right-click on monitor 1. Select "Configure Desktop and Wallpaper"
3. Now drag the window over to monitor 2.

OBSERVED RESULT
After 2: Observe how the thumbnails have the correct aspect ratio corresponding
to the screen whose wallpaper you are trying to edit (provided the window opens
on monitor 1).
After 3: Observe how the thumbnail aspect ratio changes to adopt the resolution
of monitor 2.


EXPECTED RESULT
The aspect ratio of the thumbnails does not change.


SOFTWARE/OS VERSIONS
Linux/KDE Plasma: KDE Neon 5.24
KDE Plasma Version: 5.24.4
KDE Frameworks Version: 5.92.0
Qt Version: 5.15.3

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