Review Request 123836: Ensure KNotification can be used from a non-GUI thread

[Martin Klapetek]

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https://git.reviewboard.kde.org/r/123836/
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Review request for KDE Frameworks and Plasma.


Repository: knotifications


Description
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The NotifyByPopup plugin is accessing QApplication::desktop()
in constructor which Qt does not like when that happens on non-GUI
thread and asserts. So this moves that code only when actually
needed plus it checks first if the code is run in non-GUI thread
and does nothing if it's not.

This is only for the popup fallback notifications, normal notifications
work just fine.


Diffs
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  src/notifybypopup.cpp 2f84ab0 

Diff: https://git.reviewboard.kde.org/r/123836/diff/


Testing
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Tested with both multi-threaded and single-threaded codes.


Thanks,

Martin Klapetek

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