prefs.rb

class Foo
  def self.preferences
    Preference.draw do
      preference "Appearance/Tab Theme", :type => :combo do
        default "Mac Classic"
        values ["Mac Classic", "Amy", "BBEdit"]
        change do
          puts "Theme changed to " + Redcar::Preference.get("Appearance/Tab Theme")
        end
      end
    end
  end
end