From: Hidetoshi NAGAI <nagai@...>
Date: 2003-11-27T18:06:09+09:00
Subject: Re: exceptions in tk after procs?

Hi, 

From: Ferenc Engard <ferenc@engard.hu>
Subject: exceptions in tk after procs?
Date: Wed, 26 Nov 2003 08:00:13 +0900
Message-ID: <3FC3DF06.E675F7EB@engard.hu>
> There are a few situations when ruby code runs in a way that the raised
> exceptions are swallowed by the ruby/tk code (I suppose). I didn't look
> much after it, but one of this is when ruby code runs as an 'after'
> callback.

TkAfter had a bug on treatment of TkAfter#cancel_on_exception=(mode). 
I fixed it on CVS. 
If you set TkAfter#cancel_on_exception = false, Tk will show an error 
dialog box when the after callback cause an exception. 
The default value of cancel_on_exception is true. 
Then, the TkAfter object stops in silence when cause an exception. 
On the same commitment to fix the bug, the instance variable 
"@return_value" keeps the exception. And you can receive the 
exception by TkAfter#wait method.
-- 
                                  Hidetoshi NAGAI (nagai@ai.kyutech.ac.jp)