gtk_box_pack_start(GTK_BOX(row_1), radio_unrated, FALSE, FALSE, 0);
g_signal_connect(radio_unrated, "released", G_CALLBACK(bar_pane_rating_selected_cb), prd);
gtk_box_pack_start(GTK_BOX(row_1), radio_unrated, FALSE, FALSE, 0);
g_signal_connect(radio_unrated, "released", G_CALLBACK(bar_pane_rating_selected_cb), prd);