def ask_for_file(question)
    dialog =  Gtk::FileChooserDialog.new(question, nil,
                         Gtk::FileChooser::ACTION_OPEN,
                         "gnome-vfs",
                         [Gtk::Stock::OPEN, Gtk::Dialog::RESPONSE_ACCEPT],
                         [Gtk::Stock::CANCEL, Gtk::Dialog::RESPONSE_CANCEL]
                         )
    if dialog.run == Gtk::Dialog::RESPONSE_ACCEPT
        file_name = dialog.filename.to_s
        return file_name
    else
        return nil
    end
end

path = ask_for_file("Test?")
sleep(5)
puts "continue with #{path}"