Re: setting check buttons in treeview

["Brian J. Tarricone" <bjt23 cornell edu>]

Rob Clack wrote:

> I'm using gtk 2.2.4 and Red Hat 9.
>
> I have a variable list of "things" my users can switch on and off, so 
> I populated a treeview with check buttons and text, stuck that in a 
> scrolled window and put that in the new window.
>
> This may not be the best way to do what I want, so I'm quite happy to 
> hear suggestions of alternatives, which is why I'm posting to this 
> newsgroup.  However, assuming I'm headed in the right direction, I now 
> have a problem.
>
> The list displays fine and I can preset the check buttons to ON or 
> OFF, and when I click a button my callback gets called and I can 
> detect the current setting.
>
> The difficulty is setting the button to it's opposite toggle value. ie 
> if it's ON and I click it, it should be set to OFF.  I found a posting 
> by Bijoy Chandrasekharan dated May 2003 in which he did what I want, thus
>
> gtk_tree_store_set(GTK_TREE_STORE(model), &iter, BUTTON, FALSE);
>
> but when I run this I get gtk errors:
>
> (cols:29538): GLib-GObject-WARNING **: invalid cast from 
> `GtkTreeModelSort' to `GtkTreeStore'
>
> (cols:29538): Gtk-CRITICAL **: file gtktreestore.c: line 1039 
> (gtk_tree_store_set): assertion `GTK_IS_TREE_STORE (tree_store)' failed

you need to call gtk_tree_store_set() using the GtkTreeStore (your 
"tree" pointer), not the GtkTreeModelSort (your "model" pointer).  if 
"iter" is in relation to "model", you'll have to use the 
GtkTreeModelSort functions to convert it to a GtkTreeIter in relation to 
"tree".

   -brian