sample/observ.rb

DEFINITIONS

   1  #! /usr/local/bin/ruby
   2  
   3  require "thread"
   4  require "observer"
   5  
   6  class Tick
   7    include Observable
   8    def initialize
   9      Thread.start do
  10        loop do
  11          sleep 0.999
  12          now = Time.now
  13          changed
  14          notify_observers(now.hour, now.min, now.sec)
  15        end
  16      end
  17    end
  18  end
  19  
  20  class Clock
  21    def initialize(tick)
  22      @tick = tick
  23      @tick.add_observer(self)
  24    end
  25    def update(h, m, s)
  26      printf "\e[8D%02d:%02d:%02d", h, m, s
  27      STDOUT.flush
  28    end
  29  end
  30  
  31  clock = Clock.new(Tick.new)
  32  sleep