Review Request: Plasma::Wallpaper: use a QRunnable thread to save the image in the cache.

[Davide Bettio]

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Review request for Plasma.


Summary
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This patch avoid to block plasma while the image is compressed to png and saved on disk.


Diffs
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  /trunk/KDE/kdelibs/plasma/wallpaper.cpp 1098954 

Diff: http://reviewboard.kde.org/r/3123/diff


Testing
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Thanks,

Davide