Re: [Java-gnome-developer] Updating sorted TreeModel

[Przemyslaw W. <pw...@o2...>]

Andrew Cowie wrote:
> On Wed, 2008-12-10 at 16:03 +0100, Przemyslaw Wesolek wrote:
>> I'm having troubles updating TreeModel, which is sorted: whenever I
>> update a value in the column by which the model (view?) is sorted, the
>> re-ordering happens and I have no guarantee that all the rows will be
>> iterated over. Moreover, some rows may be iterated more than once.
> 
> So this might fall into the category of "putting the wrong TreeModel in
> the TreeView"?
> 
> If you're using a TreeModelSort to wrap a ListStore, you put the
> TreeModelSort into the TreeView.

That's right, works smoothly.

To summarize:
1) Create your model
2) Create TreeModelSort wrapping your model
3) Connect wrapping model to the view
4) Propagate your model changes on the underlying model

> [at least, I've had no problem with it; I did have a case once where the
> data displayed in the TreeView would wobble a bit as I was updating all
> the rows because the sorting values were not unique, and so it sometimes
> flip-flopped a bit when confronted with equal values]

This is not a big problem for me; my first idea was to synchronize on
Gdk.lock before changing the model, maybe this would help (if TreeView
is updated in main loop)?

> Anyway, if you're still stuck you'll need to show us your code (more to
> the point, to boil your problem down to code that someone can
> comprehend, or better yet, if it's really a bug, write a TestCase that
> can go into the test suite).

For sure it is the case you described.

Hm, hard to say if it is a bug or not... For me, it is API and reality
incompatibility (i.e. iterating over the model misses some rows).

Thanks a lot,
Przemek