Re: treeview: seg fault When Collapsing a Row Containg a Selected Item

[Marshall Lake <mlake mlake net>]

> > 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 using is invalid -- or no longer valid.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);
    gtk_tree_model_get (model, &iter, NAME_COLUMN, &teamname, -1);

    if (strlen (teamname) == 4)
        /* user clicked on a year */
        return;

    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]

--
Marshall Lake -- mlake mlake net -- http://mlake.net