shoes app with druby & observer pattern

chat_client.rb

require "drb/drb"

DRb.start_service
$lists = DRbObject.new_with_uri('druby://192.168.1.3:12345')

Shoes.app :width => 250, :height => 300 do
  flow do
    @input = edit_line :width => 150 do |ed|
      $lists[:client_line] = ed.text
    end
    button 'send' do
      $lists[:history].unshift("client: " + @input.text)
      @input.text = ''
    end
  end

  stack :margin_left => 5 do
    @my_line = para strong(""), :font => "Osaka"
    @his_line = para strong(""), :font => "Osaka"
    @history = edit_box :width => 200, :height => 200
  end

  every 0.2 do
    @history.text = $lists[:history].join("\n")
    @my_line.text = $lists[:client_line]
    @his_line.text = $lists[:server_line]
  end
  
  start { @input.focus}
end

chat_server.rb

require "drb/drb"

$front = {}
DRb.start_service('druby://192.168.1.3:12345', $front)

Shoes.app :width => 250, :height => 300 do
  $front[:history] = DRbObject.new([])

  flow do
    @input = edit_line :width => 150 do |ed|
      $front[:server_line] = ed.text
    end
    button 'send' do
      $front[:history].unshift("server: " + @input.text)
      @input.text = ''
    end
  end

  stack :margin_left => 5 do
    @my_line = para strong(""), :font => "Osaka"
    @his_line = para strong(""), :font => "Osaka"
    @history = edit_box :width => 200, :height => 200
  end

  every 0.2 do
    @history.text = $front[:history].join("\n")
    @my_line.text = $front[:server_line]
    @his_line.text = $front[:client_line]
  end
  
  start { @input.focus}
end

druby.rb

require "drb/drb"
module DRuby
  include DRbUndumped
  URI = 'druby://192.168.1.3:9000'

  def self.uv=(obj)
    DRb.start_service(URI, obj)
  end

  def self.uv
    DRb.start_service
    DRbObject.new_with_uri(URI)
  end
end

module Observable
  def add_observer(observer)
    @observers ||= []
    @observers << observer
  end

  def notify_observers(*objs)
    return nil unless defined? @observers
    @observers.each do |obs|
      obs.update(*objs)
    end
  end

end

tick_server.rb

require "druby"

class Tick
  include Observable
  def start
    now = Time.now
    notify_observers(now)
    now
  end
end
$tick = Tick.new
DRuby.uv = $tick

Shoes.app :width => 200, :height => 60, :resizable => false do
  time = title "helo"
  animate 60 do |f|
    t = $tick.start
    time.replace t.strftime("%H:%M:%S")
  end
end

timer_client.rb

require "druby"

class Timer
  def update(now)
    $now = now
  end
end
$timer = Timer.new
$tick = DRuby.uv
$tick.add_observer($timer)

Shoes.app :width => 160, :height => 100 do
  flow do
    @line = edit_line :width => 100
    button "OK" do
      @h,@m,@s = @line.text.split(':').map { |t| t.to_i }
      @set_time.replace [@h, @m, @s].join(":")
    end
  end
  stack do
    @set_time = para ''
  end
  
  animate 60 do |f|
    if $now.hour == @h && $now.min == @m && $now.sec == @s
      alert "It's time!"
    end
  end
end