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Unread count for items in Mail.app-styled NSOutlineView

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Unread count for items in Mail.app-styled NSOutlineView

Subject: Unread count for items in Mail.app-styled NSOutlineView
From: Leonardo Cassarani <email@hidden>
Date: Sat, 1 Mar 2008 23:35:18 +0100

Hi all

I'm trying to make a lateral sidebar that is similar to Mail.app's or iTunes'. It all works well with a NSOutlineView with the "Data source" display option, but I was wondering how could I get the single items to draw the equivalent of the "unread count" for folders in Mail.app's sidebar, or the number of active downloads in iTunes'.

I guess it's a fairly common UI element, and I was wondering if there was an "official" way to do it, and if not is there any sample source code that you know of which I can take some inspiration from?

Thanks.
Leonardo Cassarani
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