[dolphin] [Bug 448088] New: Button "Properties | General | Explore in Filelight" does not work on MTP devices

[Gerhard]

https://bugs.kde.org/show_bug.cgi?id=448088

            Bug ID: 448088
           Summary: Button "Properties | General | Explore in Filelight"
                    does not work on MTP devices
           Product: dolphin
           Version: 21.12.0
          Platform: openSUSE RPMs
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: dolphin-bugs-null at kde.org
          Reporter: gstengel at gmx.net
                CC: kfm-devel at kde.org
  Target Milestone: ---

Created attachment 145206
  --> https://bugs.kde.org/attachment.cgi?id=145206&action=edit
Error message after pressing "Explore in Filelight"

If you right click on a folder in Dolphin, you can choose the "Properties"
menu. In the tab "General", there is a button "Explore in Filelight" which
normally opens Filelight which displays a graphical statistics about the
directory's content.

If you try to do the same with a folder of an MTP device like an Android phone,
this function fails with an error message popping up that the folder could not
be read.

Note that it is possible to open the folder of the MTP device from within
Filelight directly, so this is why I think Dolphin is to blame here.

STEPS TO REPRODUCE
1. Plug in an Android phone by USB, choose the USB setting "Files" on the phone
2. Browse into the phone's file system with Dolphin, right click on any folder
and press the button "Explore in Filelight"

OBSERVED RESULT
An error message pops up, see screenshot

EXPECTED RESULT
Filelight should be opened and show a statistics of the folder

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: OpenSUSE Tumbleweed 20220106
KDE Plasma Version:  5.23.4
KDE Frameworks Version: 5.89.0
Qt Version: 5.15.2

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