Re: Speedup insert into treestore

["muppet" <scott asofyet org>]

Florian Schaefer said:
> Hi Muppet!
>
> On Sun, 9 Oct 2005 14:44:29 -0400, muppet said:
>
> [...]
> > This is the basic idiom; i've written it for a list, but you can
> > expand that to a tree without much difficulty.
> [...]
>
> OK, here is my implementation:
>
> 1: my $model = $view->get_model;
> 2: $view->set_model (undef);
> 3: my @cursort = $model->get_sort_column_id ();
> 4: $model->set_sort_column_id (-2, 'descending');
> 5: $model->clear;
> ...repopulate...
> 6: $model->set_sort_column_id (@cursort);
> 7: $view->set_model ($model);
>
> line 3: produces this error:
> Gtk-CRITICAL **: gtk_tree_sortable_get_sort_column_id: assertion
> `GTK_IS_TREE_SORTABLE (sortable)' failed

This means that whatever class $model is an instance of does not implement the
GtkTreeSortable interface.  ListStore and TreeStore both do.  The
TreeModelSort proxy class does.  TreeModelFilter does not.  Custom models may
not.

What is $model actually, then?


> line 4: using only one argument (-2) doesn't work here, I must provide a
> second one, with this version it gives the same message as line 3.

Again, that means $model doesn't have the right type.


> line 5: this results in:
> Gtk-CRITICAL **: gtk_tree_store_clear: assertion `GTK_IS_TREE_STORE
> (tree_store)' failed

This is complaining the $model is not a Gtk2::TreeStore.

It really sounds like you're using a TreeModelFilter, and need to use
get_child_model to get to the real TreeStore -- e.g.:

  $model = $view->get_model->get_child_model();



The fact that you're able to call these methods with an instance that doesn't
have the correct type implies that something is broken in the bindings' @ISA
setup.  Could you please strip your program down to the bare minimum needed to
reproduce the problem, and send that?


-- 
muppet <scott at asofyet dot org>