int evolve_widget_list_sort_cb(void *d1, void *d2)
{
   Evolve_Widget *w1;
   Evolve_Widget *w2;

   w1 = d1;
   w2 = d2;

   /* no parents, both are top level */
   if (!w1->parent && !w2->parent)
     return 0;

   /* w1 needs to go to the top */
   if (!w1->parent)
     return -1;
                                                  
   /* w2 needs to go to the top */
   if (!w2->parent)
     return 1;
                                                  
   /* w2 has parent w1, w1 goes to top */
   if (!strcmp(w2->parent, w1->name))
     return -1;
             
   /* w1 has parent w2, w2 goes to top */
   if (!strcmp(w1->parent, w2->name))
     return 1;
}