On 16/06/2009, at 4:00 PM, Ken Thomases wrote:
Actually, I believe a data source has stricter requirements on it
than merely following the memory management rules.
From <http://developer.apple.com/documentation/Cocoa/Conceptual/OutlineView/Articles/UsingOutlineDataSource.html#//apple_ref/doc/uid/20000725-140686
>:
Ah, OK, this is trickier than I thought. Thanks for the correction.
I think there's no getting away from the need for the data source to
maintain all of the objects it vends. It can allocate them lazily,
on demand. The object can be owned by the C++ object, or there can
be a mapping from each C++ object to the corresponding Objective-C
object, or you can maintain an Objective-C data structure that
parallels the C++ data structure.
Yes - I imagined you could probably create an autoreleased wrapper on
the fly for each item requested by the outline view, but it looks like
it's not going to work, more's the pity.
--Graham
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