From: Lionel MAIAUX <lionel.maiaux@...>
Date: 2006-09-02T00:32:16+09:00
Subject: Why does the derived class instance need to be duplicated with TkComposite

Hello,

Is there any reason to duplicate the derived class instance when using 
TkComposite ?

Examples :

1/ tk/sample/scrollframe : there are 3 frames instantiated for a 
Tk::ScrollFrame object : self (derived from TkFrame), @frame (from 
TkComposite) and@base (embedded frame)
Why can't we use self for the enbedded frame ?

2/ tk/sample/tktextframe.rb : there are 2 TkText instantiated for a 
TkTextFrame object : self (derived from TkText) and @text.
Why this duplication ?

Thanks for your explanations and regards,
Lionel