From: RubyCrazy <rubycrazy@...>
Date: 2007-03-16T20:12:26+09:00
Subject: Re: Trapping ESC key

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On 3/16/07, Harry <ruby.hardware@gmail.com> wrote:
>
> >
> > I am stuck and can't find a simple and portable way to trap the ESC key=
.
> Any
> > pointers, help is most appreciated.
> >
> >
> Will this do it?
>
>
> http://blog.grayproductions.net/articles/2006/10/01/i-just-want-one-chara=
cter
>
> Harry
>

Harry, I have tried HighLine but that's not what I want (or am I making a
mistake here?). I am trying to solve the problem - ** "Display series of
numbers (1,2,3,4, 5=85.etc) in an infinite loop. The program should quit if
someone hits a specific key (Say ESCAPE key)."

Somehow I want to keep checking in a thread (this should be non-blocking)
for the ESC key press. Once ESC is pressed my program terminates. Right now=
,
my thread code blocks till I press ESC key, as you can see here -

require 'Win32API'
def getchar
  char =3D Win32API.new("crtdll", "_getch", [], 'L').call
  if char =3D=3D 27 # ESC key
    exit
  end
end

i =3D 0
loop do
  print "#{i+=3D1}, "
  getchar
end

What should I do? Thanks.

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