Re: GtkListStore

[Jonathan Blandford <jrb redhat com>]

martyn 2 russell bt com writes:

> >  I am confused by this statement :
> > "Additionally, some models guarantee that an iterator is 
> > valid for as long as
> > the node it refers to is valid (most notably the GtkTreeStore and
> > GtkListStore)" (GtkTreeModel doc).
> >
> >
> >   Does it mean that I can store/save the interator in my 
> > application and use it
> > later to access the data ? ( Even if I delete/add rows ? )
>
> I wouldn't recommend it.  What happens if you store it and the thing it
> points to gets deleted? or moved? I *THINK* that at that point the iterator
> becomes invalid, but even if it doesnt and you use it, you will not be
> pointing at what you expect to be pointing at.

You can keep the Iter around and access it for the life of the row with
a GtkListStore.  Once the row has been deleted, you had better get rid
of it.

> I agree with you though, the documentation is not very clear when it
> introduces phrases like "... some models ...".  To me this sounds like they
> mean, "...depending on how the model is implemented..." - I could be wrong.

It depends on whether or not the model has the GTK_TREE_ITERS_PERSIST
flag set or not.

Thanks,
-Jonathan