Wifi meter using Shoes

gistfile1.rb

# A tiny wifi meter
# usage : shoes wifi.rb

Shoes.app(:title => "wifi meter", :width => 250, :height => 100) do
  background gradient(rgb(0,0,0), rgb(40,40,40))

  header = {
    :font => 'Georgia',
    :size => '48px',
    :stroke=>'#'+'E'*3,
    :justify=>true ,
    :stroke => white,
    :align => "center"
  }

  stack {
    @label =  para '', header
  }

  animate(1) do |frame|
    begin
      a=IO::popen("cat /proc/net/wireless | grep eth1 | tr -s ' ' | cut -d ' ' -f4")
      value=a.readlines[0]
      value=value.to_i*20
      @label.replace(value.to_s+' %')
    rescue ArgumentError
      @label.replace("?")
    end
  end
end