Example for Vultraz of a `BOOST_FOREACH` loop over `tod_{red,green,blue}_field_`. May not work; as I said, I’m a bit out of practice with C++.

gistfile1.cpp

tfield_integer* tod_colors[] = {tod_red_field_, tod_green_field, tod_blue_field_};
BOOST_FOREACH(tfield_integer* color, tod_colors)
	connect_signal_notify_modified(*(color->widget()), boost::bind(
		&tcustom_tod::slider_update_callback, this, boost::ref(window)));