From: Hidetoshi NAGAI <nagai@...>
Date: 2005-07-18T08:00:32+09:00
Subject: Re: TkVarible question

From: Joe Van Dyk <joevandyk@gmail.com>
Subject: Re: TkVarible question
Date: Sat, 16 Jul 2005 04:51:08 +0900
Message-ID: <c715e6405071512504601135b@mail.gmail.com>
> Don't ask me why it is, but:
> 
> #label1 = TkLabel.new(root) do
>   #textvariable @tkvar
>   #pack
> #end
> label1 = TkLabel.new(root, :textvariable => @tkvar).pack
> 
> That works.

The block given to 'new' method is passed to 'instance_eval' method.
That is, @tkvar in the block is not an instance variable of the Tktest 
object but of the label widget. And then, because @tkvar is nil, the
textvariable option value of the widget is set to an empty string.
-- 
Hidetoshi NAGAI (nagai@ai.kyutech.ac.jp)