Review Request: use QGraphicsOpacityEffect in FadeAnimation

[Giulio Camuffo]

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http://reviewboard.kde.org/r/1860/
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Review request for Plasma and Adenilson Cavalcanti.


Summary
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This little patch makes the FadeAnimation use QGraphicsOpacityEffect instead of setting the opacity directly on the widget.
This solves a graphical glitch with Plasma::Label.


Diffs
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  /trunk/KDE/kdelibs/plasma/animations/fade.h 1036002 
  /trunk/KDE/kdelibs/plasma/animations/fade.cpp 1036002 

Diff: http://reviewboard.kde.org/r/1860/diff


Testing
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tested, works


Thanks,

Giulio