g_object_set_data (G_OBJECT (model), "first-line",
GINT_TO_POINTER (first_line));
gtk_tree_view_set_model (*tree_view, model);
g_object_set_data (G_OBJECT (model), "first-line",
GINT_TO_POINTER (first_line));
gtk_tree_view_set_model (*tree_view, model);