Review Request: Fix panel redraw after screen resize

[Ralf Jung]

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http://git.reviewboard.kde.org/r/106519/
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Review request for Plasma.


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?


This addresses bug 269635.
    http://bugs.kde.org/show_bug.cgi?id=269635


Diffs
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  plasma/desktop/shell/panelview.cpp 7713740 

Diff: http://git.reviewboard.kde.org/r/106519/diff/


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.


Thanks,

Ralf Jung

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