g_signal_connect_swapped (act->summary_var_name_entry, "changed", G_CALLBACK (update_acr), act);
g_signal_connect_swapped (act->function_combo, "changed", G_CALLBACK (update_acr), act);
g_signal_connect_swapped (act->summary_sv_entry, "changed", G_CALLBACK (update_acr), act);
g_signal_connect_swapped (act->summary_var_name_entry, "changed", G_CALLBACK (update_acr), act);
g_signal_connect_swapped (act->function_combo, "changed", G_CALLBACK (update_acr), act);
g_signal_connect_swapped (act->summary_sv_entry, "changed", G_CALLBACK (update_acr), act);