Set placeholder text in Gtk.ComboBoxText?

Question

I know how to set the default selection in a ComboBox, but I have a ComboBoxText widget that allows the user to enter his/her gender. So, I could use Gtk.ComboBox.set_active(), but that would express some sort of sexism, as the default selection would be either "Male" or "Female".

My question is how can I set a placeholder string on my ComboBox, but without it being in the list of choices?

Using python3 with gobject introspection.

Answer 1

You could create the GtkComboBoxText with an entry, and then connect to the format-entry-text signal, and then return the default string if no other selection has been made. The Gtk+ docs contain an example of this signal (in C) here: http://developer.gnome.org/gtk3/3.4/GtkComboBox.html#GtkComboBox-format-entry-text.