From: "G.Durga Prasad" <gdprasad@...>
Date: 2006-02-12T03:35:38+09:00
Subject: Re: Graphics in irb

On 2/11/06, Andrew McGuinness <a.mcguinness@ntlworld.com> wrote:
> I'm starting to teach my 7-year-old programming in Ruby, but unlike
> Scheme or Python or Logo, there doesn't seem to be a graphical
> interactive environment, such as DrScheme or Livewires.
>
> It should be easy to create one, and I've made a start using Tk and irb.
> I've come across what looks like an ommission in irb:
>
> The IRB::Irb constructor takes optional "input_method" and
> "output_method" parameters.  I've created an InputMethod subclass that
> reads commands from a GUI window, which works, but the output method is
> ignored - it's passed to the IRB::Context object, but never used.
>
> It looks like something like the following is missing:
>
> module IRB
>    class Context
>      def output( str )
>        @output_method.print( str )
>      end
>    end
>
>    class Irb
>      def printf( *args )
>        @context.output( sprintf( *args ) )
>      end
>    end
> end
>
> By doing that, I can then direct irb's output to my GUI object.
>
> How should this get fixed in irb?
>
> --
> Andrew McGuinness
>

I think you can look here for a solution
http://onestepback.org/packages/rubyturtles/

Prasad