+ menuitem = gtk_menu_item_new_with_label("Expand all");
+ g_signal_connect(menuitem, "activate", G_CALLBACK(expand_all_cb), tree_view);
+ gtk_menu_shell_append(GTK_MENU_SHELL(menu), menuitem);
+ menuitem = gtk_menu_item_new_with_label("Collapse all");
+ g_signal_connect(menuitem, "activate", G_CALLBACK(collapse_all_cb), tree_view);
+ gtk_menu_shell_append(GTK_MENU_SHELL(menu), menuitem);