From: "Jon A. Lambert" <jlsysinc@...>
Date: 2005-09-27T14:01:25+09:00
Subject: Re: IO#getc behavior

Thanks Simon and Sean..

By way of followup to anyone having similar problems ...

I had success with this:

if RUBY_PLATFORM =~ /win32/
  require 'Win32API'
  Kbhit = Win32API.new("msvcrt", "_kbhit", [], 'I')
  Getch = Win32API.new("msvcrt", "_getch", [], 'I')
  def getkey
    sleep 0.01
    return nil if Kbhit.call.zero?
    c = Getch.call
    c = Getch.call + 256 if c.zero? || c == 0xE0
    c
  end
else
  def getkey
    select( [$stdin], nil, nil, 0.01 ) ?  c = $stdin.getc : c = nil
  end
end

You've got to check getch for extended scancodes.  

Also I use an echo/no echo option later in the code and
found getche() works like Unices getc() in that regard and to 
get Unices getc() to not echo and still allow CTL-C interrupts
handled by Ruby I had to do this upon starting...

    if !WIN32 && $opts.echo
      system('stty cbreak -echo')
    end

and this upon exiting..

    if !WIN32 && $opts.echo
      system('stty -cbreak echo')
    end

--
J Lambert