[Okular-devel] [Bug 234419] New: okular print preview dialog should use background threading for preview generation process

[anton]

https://bugs.kde.org/show_bug.cgi?id=234419

           Summary: okular print preview dialog should use background
                    threading for preview generation process
           Product: okular
           Version: unspecified
          Platform: openSUSE RPMs
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: wishlist
          Priority: NOR
         Component: general
        AssignedTo: okular-devel at kde.org
        ReportedBy: benderamp at gmail.com


Version:            (using KDE 4.4.2)
OS:                Linux
Installed from:    openSUSE RPMs

As shown in this bug:
https://bugs.kde.org/show_bug.cgi?id=234079

print preview generation process might take a long time even for documents
which look simple at the first sight or when there are problems accessing
system printing service. During this time Okular locks UI for unpredictable
period of time.

So it would be much better if ocular did show preview window immediately after
calling it from menu and ps preview file generation process could be shown as
progress bar inside this window (generation process could be run in background
thread) - working 'cancel' button which could terminate this process
if it takes too long could also give much help.

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