[okular] [Bug 493623] New: After digitally signing, Okular window shows "doesn't react"

[Oliver Sander]

https://bugs.kde.org/show_bug.cgi?id=493623

            Bug ID: 493623
           Summary: After digitally signing, Okular window shows "doesn't
                    react"
    Classification: Applications
           Product: okular
           Version: unspecified
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: PDF backend
          Assignee: okular-devel at kde.org
          Reporter: oliver.sander at tu-dresden.de
  Target Milestone: ---

With the new signing UX, after I have clicked on the "finish signing" button,
Okular becomes unresponsive for a few seconds.  During that time, the entire
Okular window fades to grey and the window title says "Okular reagiert nicht
(Okular doesn't react)".

I guess that this is simply the time it takes Okular to do the actual signing.
A better progress indicator would be appreciated, but the real problem is that
Okular doesn't come back properly.  After a few seconds, the new signature
appears together with the "this document is digitally signed" message. 
However, the window remains grey, and the "doesn't react" message does not go
away. Only after I switch the focus to another window and then back Okular does
everything go back to normal.

SOFTWARE/OS VERSIONS
Operating System: Debian GNU/Linux 12
KDE Plasma Version: 5.27.11
KDE Frameworks Version: 5.115.0
Qt Version: 5.15.13
Kernel Version: 6.10.9-amd64 (64-bit)
Graphics Platform: offscreen
Processors: 8 × Intel® Core™ i7-8565U CPU @ 1.80GHz
Memory: 15.3 GiB of RAM
Graphics Processor: Mesa Intel® UHD Graphics 620

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