Re: Treeview help needed

[edscott wilson garcia <edscott imp mx>]

On Sun, 2003-08-17 at 23:33, Vadim Berezniker wrote:
> wilfried kopp wrote:
> > Hi everybody,
> > 
> > I am stuck with a segmentation fault caused by a treeview and I have pent hours trying to figure out what's wrong with no success.
> > 
> > 
> > Here is how I create the model (I simplified the code... but this version crashes as well...)
> >   while (item)
> >     {
> >       gtk_list_store_append (store, &iter);
> >       gtk_list_store_set (store, &iter,
> > 			  MIME_TYPES_TO_SKIP_COLUMN_STATE, 0 ,
> > 			  MIME_TYPES_TO_SKIP_COLUMN_MIME_TYPE, test,
> > 			  -1);
> > 
> >       item=g_list_next(item);
> >     }
> > 
> 
> That looks OK.
> 
> > The segmentation fault happens when I remove an item with this code:
> >  gtk_tree_model_get (model,&iter,
> >   		      0, &state, 
> >   		      1, &mime_type,
> > 		      -1);
> > 
> 
> Why are you using constants such as (MIME_TYPES_TO_SKIP_COLUMN_STATE and 
> MIME_TYPES_TO_SKIP_COLUMN_MIME_TYPE) in the code that adds data but 
> referencing them by number here. This could lead to problems if the 
> constants change later.
> 
> >   if (gtk_tree_selection_get_selected (listSelection, NULL, &iter))
> >   {
> >     gtk_list_store_remove (GTK_LIST_STORE (model), &iter);
> >   }
> > 
> > 
> > Here is what ddd says:
> > (gtktalog:5396): Gtk-CRITICAL **: file ../../gtk/gtkliststore.c: line 566 (gtk_list_store_get_value): assertion `GTK_LIST_STORE (tree_model)->stamp == iter->stamp' failed
> > 
> 
> The error seems to indicate that you modified the model after retrieving 
> the iterator, which invalidates the iterator.

To avoid this, use a GtkTreeRowReference to recalculate a valid
iterator.

> 
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