[okular] [Bug 439723] While printing special sample file or generating a printer preview for it the UI freezes

[Nicolas Fella]

https://bugs.kde.org/show_bug.cgi?id=439723

--- Comment #1 from Nicolas Fella <nicolas.fella at gmx.de> ---
> It seems to run on the same thread as the UI if I am not mistaken?

yes, that appears to be the case.

What might make sense is to change "Document::PrintError print(QPrinter
&printer)" to something like "PrintJob print(QPrinter &printer)" where PrintJob
is a (KJob derived) class that encapsulates an async print operation. 

However that touches the generator interface, which as I understand is subject
to ABI constraints?

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