Re: Freeing a linked list of Widgets

[Owen Taylor <otaylor redhat com>]

Gert <gs2@nowmoo.demon.nl> writes:

> On Tue, 6 Apr 1999, Ted Milker wrote:
> 
> > Hey all, I'm trying to figure out the best way to free a linked list of
> > widgets.  Could someone give me a small snippet of code to do this?  I don't
> > even know which *free() function to use. :(
> > 
> > Thanks,
> > Ted
> 
> Try this (assiming you have a GList of those widgets):
> /****/
> void free_widget_list(GList *list) {
> 	GList *l;
> 	for(l = list; l != NULL; l = l->next)
> 		gtk_widget_destroy(l->data);
> 	g_list_free(list);
> }
> /****/

Or, slightly more compactly (though one funccall slower)

 g_list_foreach (list, (GFunc)gtk_widget_destroy, NULL);
 g_list_free (list);

BUT...

This is only appropriate if you have a list of _toplevel_
widgets. Most of the time, child widgets (that is, widgets
that have been added to a parent) will automatically
be freed as appropriate.

If they are non-toplevel widgets without a parent, then there
are some additional refcounting complications to deal
with.

Regards,
                                        Owen