[dolphin] [Bug 419566] New: Folder thumbnail previews exceed their region if aspect ratio is extreme

[Brennan Kinney]

https://bugs.kde.org/show_bug.cgi?id=419566

            Bug ID: 419566
           Summary: Folder thumbnail previews exceed their region if
                    aspect ratio is extreme
           Product: dolphin
           Version: 19.12.3
          Platform: Manjaro
                OS: Linux
            Status: REPORTED
          Severity: minor
          Priority: NOR
         Component: general
          Assignee: dolphin-bugs-null at kde.org
          Reporter: polarathene-signup at hotmail.com
                CC: kfm-devel at kde.org
  Target Milestone: ---

Created attachment 127226
  --> https://bugs.kde.org/attachment.cgi?id=127226&action=edit
Info Panel showing the preview breaking out of it's expected bounds

SUMMARY
For tall/wide images, where the aspect ratio is large, the thumbnail preview
appears to exceed the intended region for display.

This only affects the preview thumbnail on a thumbnail, individual icon
previews per file seem to be fine.

STEPS TO REPRODUCE
1. Have a folder with some images, with at least one very wide or tall image.
2. Look at the generated preview for the folder icon in details view or info
panel.

OBSERVED RESULT
Preview breaks out of it's region/quarter on the folder preview.

EXPECTED RESULT
Either don't display it, scale it down to fit it's region, or fade/crop to fit.
Scaling it may serve no value preview wise, other than avoiding the rendered
bug.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Manjaro KDE
KDE Plasma Version: 5.18.3
KDE Frameworks Version: 5.68.0
Qt Version: 5.14.1

ADDITIONAL INFORMATION
Possible duplicate of this 2008 bug report that has seen no activity since
2011:
https://bugs.kde.org/show_bug.cgi?id=160520

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