On Sun, 2007-06-17 at 09:37 -0400, Marshall Lake wrote:
> >> I have a treeview/treestore containing many top-level rows. Each
> >> top-level row contains many children. The treeview works fine except
> >> for one thing. If the user expands a top-level row, selects a child,
> >> and then collapses that row the program seg faults with the console
> >> error:
> >>
> >> gtk_tree_store_get_value: assertion `iter->stamp == GTK_TREE_STORE
> >> (tree_model)->stamp' failed
> >> gtype.c:3351: type id `0' is invalid
> >> can't peek value table for type `<invalid>' which is not currently
> >> referenced
>
> > Without seeing the code I can only guess. I seems that the iter your
> > using is invalid -- or no longer valid. This could occur if you used a
> > LOCAL variable to create the iter; then saved the pointer of that inter
> > and tried to use it somewhere else which creates the segfault.
> >
> > To poke around looking for it, use this api to test iters before use:
> > bool=gtk_tree_store_iter_is_valid(GtkTreeStore *tree_model, GtkTreeIter
> > *iter)
>
> I apologize for not posting the code originally. See below.
>
> I don't quite understand how the gtk_tree_store_iter_is_valid() function
> will help me since the seg fault occurs when the top-level row is
> collapsed and is (seemingly ?) out of my control.
>
>
>
> void
> TeamSelected2 (GtkTreeSelection *selection) {
> GtkTreeModel *model;
> GtkTreePath *path;
> GtkTreeIter iter;
> gint sub, row_count, x;
> gchar *teamname, path_str[10] = " ";
> gboolean valid;
>
> gtk_tree_selection_get_selected (selection, &model, &iter);
The gtk_tree_selection_get_selected() api returns TRUE is something is
selected. You never checked its return value!
consider doing this:
if (selection == NULL) {
return;
}
if ( !( gtk_tree_selection_get_selected (selection, &model, &iter) ) )
{
return;
}
> gtk_tree_model_get (model, &iter, NAME_COLUMN, &teamname, -1);
>
> if (strlen (teamname) == 4)
> /* user clicked on a year */
> return;
>
Not sure what your looking for here? you already have the iter to the selected
row?
>
> for (sub = row_count = 0; sub < toplevelentries; sub++, row_count = 0) {
> /* walk through the root level of data (years) */
> sprintf (&path_str[0], "%d:0", sub);
> path = gtk_tree_path_new_from_string (&path_str[0]);
>
> valid = gtk_tree_model_get_iter (model, &iter, path);
> while (valid) {
> /* walk through the sub-level (teams), looking for the selected
> row */
> if (gtk_tree_selection_iter_is_selected (selection, &iter) ==
> TRUE)
> /* get out of the for() loop */
> goto GetOutFor;
>
> row_count++;
> valid = gtk_tree_model_iter_next (model, &iter);
> }
> }
> GetOutFor:
>
> [do some processing and return]
>
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