TkComposite?

Hello,

I have looked at Takaaki Tateishi’s TkCombobox at
http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-list/18167.

Takaaki includes, TkComposite but it seems that do not use every
capabilities of it. Questions:

  1. He could use the TkComposite-created @frame instead of its own
    @eframe, is he?

  2. Why he originates TkCombobox from TkEntry? The object’s @path would
    point to a frame, so I cannot see the point what is it good for. I am
    missing something?

Thanks,
Ferenc