Review Request: Fix panel redraw after screen resize

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This review has been submitted with commit 2fe20079a8cdeef325ca7f215f16fa07f75d2603 by Ralf Jung to branch master.

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On Sept. 21, 2012, 3:57 p.m., Ralf Jung wrote:
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> This is an automatically generated e-mail. To reply, visit:
> http://git.reviewboard.kde.org/r/106519/
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> (Updated Sept. 21, 2012, 3:57 p.m.)
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> Review request for Plasma.
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> Description
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> This patch is my attempt to fix redrawing the panel when the screen is resized. During my experiments, I added update() calls to all places I could think of, but none of them helped - it seems that even though the panel is redrawn, that content is not properly displayed. I am not sure whether this might actually be a bug in KWin: For example, I also saw parts of the panel content end up in the desktop background if compositing was disabled and the background was set to a solid black, opposed to an actual image. I don't have the knowledge to persuade that idea further though.
> I found, however, a solution (or a work-around) to fix the panel bug. Is that acceptable?
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> This addresses bug 269635.
>     http://bugs.kde.org/show_bug.cgi?id=269635
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> Diffs
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>   plasma/desktop/shell/desktopcorona.h b65a926 
>   plasma/desktop/shell/desktopcorona.cpp ea58c2c 
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> Diff: http://git.reviewboard.kde.org/r/106519/diff/
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> Testing
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> Re-sized the screen a few times (using xrandr) to verify that the graphical glitches after a resize are gone.
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> Thanks,
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> Ralf Jung
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