From: bbense+comp.lang.ruby.Jan.22.02@...
Date: 2002-01-23T12:33:12+09:00
Subject: Re: Newbie question: RubyTk and Observer ?

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In article <g59e4ugpbvg4sg2ajugjo4lha18jpujcc5@4ax.com>,
Dave  <dlc-usenet@halibut.com> wrote:
>
>Greetings,
>
>
>So what I'm doing as a first project is that old first-quarter CS
>staple, Conway's Life.  It should be an interesting exercise in
>refactoring, as the first versions will be a naive, slow
>implementation with the universe being a 2D array of distinct Cell
>objects; then as I learn more I'll move to a Flyweight pattern for the
>cells and then a bitmapped universe, etc. etc.
>
>What I'm wondering about is how I'm going to display the results.  I
>was thinking of RubyTk, since I've dabbled a little in Tcl/Tk, but
>what I can't figure out is how I can make a Tk window an Observer of
>my universe.  Tk's event-loop model is making me scratch my head.
>Once I drop into Tk.mainloop, how the heck am I going to get any Life
>processing done?  

- - I'm not too familiar with the Ruby version of Tk yet, but the
  standard way to post timed events in Tk is to use the after 
  command. Look in 

ext/tk/sample/tktimer.rb

  for examples of how to use Tk.after. 

- - Booker C. Bense 

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