[PyKDE] Model indexes and internal pointers

[Jeremy Sanders]

On Wed, 19 Jul 2006, David Boddie wrote:

> Probably, but there's not much you can do if you attach Python objects
> to temporary C++ objects and pass them back to Qt. If you just prevent
> them from being collected, there's the chance that they'll become
> unrecoverable. Maybe the handling of QPersistentModelIndex needs to be
> looked at more closely.

I ran into this issue when trying to write a bridging tree layer to 
convert from the tree in my python code to the treemodel for the treeview. 
These bridging objects would get collected. It's very hard to do this with 
the current code.

In the end I directly connected the model indexes to my internal python 
structure. I used a weakref.WeakValueDictionary() to map the model index 
IDs to my internal objects.

Jeremy

-- 
Jeremy Sanders <jeremy at jeremysanders.net>
http://www.jeremysanders.net/                Cambridge, UK
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