Re: [NSOutlineView] How to know an item is expanded if its parent item is not?

FROM : Jonathan Dann
DATE : Sun Mar 02 17:50:18 2008

On 1 Mar 2008, at 23:02, Stéphane Sudre wrote:

> There seems to be a missing method in NSOutlineView.
>
> You can know an item is expanded only if its parent is expanded (so 
> that the item itself is visible).
>
> This is problematic if you want to cache the current list of 
> expanded items. Instead of just iterating through the item hierarchy 
> when needed, you would need to use the notifications sent when an 
> item is about to be disclosed or closed.
>
> This is a bit strange if you consider that NSOutlineView probably 
> caches this information in _expandSet or _expandSetToExpandItemsInto 
> so that it can remember to expand the children of an item if needed.
>
> An I missing something and is there a way to know which items are 
> expanded (either visible or not)?


For what it's worth, I haven't found a way to do this either, would be 
really great if this can be cracked.  I had to manually track all the 
NSOutlineViewItemDidExpand (and the Collapse) notifications.

Jon_______________________________________________

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