gistfile1.rbx

require 'gosu'
require 'date'
$Kcode = 'u'

def remain(date)
  intervals = [["天",1],["小時",24],["分鐘",60],["秒",60]]
  elapsed = DateTime.now - date
  interval = 1.0

  parts = intervals.collect do |name,new_interval|
    interval /= new_interval
    number,elapsed = elapsed.abs.divmod(interval)
    "#{number.to_i}#{name}"
  end  
  return parts.join('')
end

class GameWindow < Gosu::Window
  def initialize
    super(730, 60, false)
    self.caption = "CountDown"
    @now = DateTime.now
    @deadline = DateTime.parse("2009-02-28T00:00:00+08:00")
    @font = Gosu::Font.new(self, Gosu::default_font_name, 40) 
  end

  def update
    @remain = remain(@deadline)

  end

  def draw
    @font.draw("距離台大考試還有：#{@remain}", 10, 10, 0, 1.0, 1.0, 0xffffff00)  
  end
end

window = GameWindow.new
window.show