[Kde-accessibility] GUI patches for KMagnifier

[Olaf Jan Schmidt]

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[Olaf Jan Schmidt]
> Gunnar just send me an updated version that closes the window
> completely when not used. I also wanted to do some further
> improvements, will send it to the list soon.

Ok, here they are.

The window now only exists when needed, so the CPU usage problem that I 
couldn't reproduce cannot occur now. I also fixed two small bugs in my 
patch.

I have also optimised kmagzoomview.cpp by telling Qt that it does not need 
to paint a background for the window, and by painting black areas 
directly if needed, rather than dealing with huge pixmaps.

OK to commit?

Olaf.

- -- 
Olaf Jan Schmidt, KDE Accessibility Project
KDEAP co-maintainer, maintainer of http://accessibility.kde.org

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