Using other images for Gtk::Expander?

Hi, the default Gtk::Expander works nicely

But is there a way to use different images than the default one,
specifically a [+] icon and a [-] icon? I am asking because in some
applications i see a + icon, which expands some kind of treeview below
it, and the + icon then becomes a - icon, which about button press
action on it, closes that again.

This forum is not affiliated to the Ruby language, Ruby on Rails framework, nor any Ruby applications discussed here.

| Privacy Policy | Terms of Service | Remote Ruby Jobs