Re: Cross-coupling comboboxes

> AFAICT the "blocking" has to be
> applied per-signal, so I need to keep track of all the connection
> instances for all the comboboxes, yes?

Yeah, I often forget that glibmm/gtkmm use Glib::SignalProxy rather than sigc::signal. The former will need you to retain and un/block the individual handler connections, whereas the latter would've let you do all at once. I guess it makes sense; we don't normally want to have to block everything including GTK/GLib's own handlers.

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