From: Hidetoshi NAGAI <nagai@...>
Date: 2010-04-05T07:03:55+09:00
Subject: Re: Tk delay

From: Jesse Jurman <e.j.jurman@gmail.com>
Subject: Re: Tk delay
Date: Sun, 4 Apr 2010 03:40:47 +0900
Message-ID: <6f928e01e551a8081eb1f1d54a246b9c@ruby-forum.com>
> I'm using the Snack audio toolkit for ruby, so I already know how long 
> the song is... I don't need to constantly check if the song is 
> playing... I just need to have a block of code run after a set number of 
> seconds.

Snack toolkit can call a callback procedure at end of the sound.
Isn't it enough for your purpose?

I don't know Snack for Ruby (rbsnack) library.
Even if rbsnack doesn't support such callback, 
you can call the feature of Tcl/Tk from Ruby/Tk
(if your Tcl/Tk can load Snack, and your Ruby/Tk loads the Tcl/Tk's libs).

For example, 
-----------------------------------------
sndname = 'foobar'
Tk.tk_call('snack::sound', sndname, '-file', sndfile, '-fileformat', fmt, ...)
Tk.tk_call(sndname, 'play', '-callback', proc{puts "end of the sound"})
-----------------------------------------
-- 
Hidetoshi NAGAI (nagai@ai.kyutech.ac.jp)