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NSOutlineView display optimization

From: Matt Rice
Subject: NSOutlineView display optimization
Date: Tue, 06 Feb 2007 04:47:56 -0800
User-agent: GNUMail (Version 1.2.0)

wrt reloadItem:reloadChildren: redisplaying all the rows

saw this discussed at

this seems to work... not sure what happens if the item isn't in the outline view
it might want to test that...

also, not sure how much of an optimization it would be... could see rowOfItem: being rather slow on large outline views as it has to isEqual: every item in the _items array...


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