Review Request: Ensure that LayoutItem::setParent resets the parents layout if we are currently its layout and release managed items.

[Aaron Seigo]

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http://matt.rogers.name/r/89/
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Review request for Plasma.


Summary
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This is just more safety stuff, not sure it really has any practical uses at this point. Reseting the parent of a Layout still doesn't auto-add the children of it, but since both the children are known only to the Widget and the method of adding them varies between layouts ..... i don't see a nice generic solution for this yet.

Note that this also a BIC change =/ 


Diffs
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  /trunk/KDE/kdebase/workspace/libs/plasma/layouts/borderlayout.h
  /trunk/KDE/kdebase/workspace/libs/plasma/layouts/borderlayout.cpp
  /trunk/KDE/kdebase/workspace/libs/plasma/layouts/boxlayout.h
  /trunk/KDE/kdebase/workspace/libs/plasma/layouts/boxlayout.cpp
  /trunk/KDE/kdebase/workspace/libs/plasma/layouts/flowlayout.h
  /trunk/KDE/kdebase/workspace/libs/plasma/layouts/flowlayout.cpp
  /trunk/KDE/kdebase/workspace/libs/plasma/layouts/freelayout.h
  /trunk/KDE/kdebase/workspace/libs/plasma/layouts/freelayout.cpp
  /trunk/KDE/kdebase/workspace/libs/plasma/layouts/layout.h
  /trunk/KDE/kdebase/workspace/libs/plasma/layouts/layout.cpp
  /trunk/KDE/kdebase/workspace/libs/plasma/layouts/nodelayout.h
  /trunk/KDE/kdebase/workspace/libs/plasma/layouts/nodelayout.cpp

Diff: http://matt.rogers.name/r/89/diff


Testing
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Thanks,

Aaron