SassyTomato Timer (for pomodoros)

tomato.rb

Shoes.app :height => 185, :width => 215, :title => "SassyTomato" do
  background white
  @time_to_start = Time.new
  @stopped = true
  flow do
    stack :margin => 10, :width => 75 do
      image "http://i.imgur.com/NgtbE.jpg"
    end
    stack :margin => 10, :width => -75 do
      button "Pomodoro" do
        @time_to_stop = Time.now + 25 * 60
        run
      end
      button "Short Break" do
        @time_to_stop = Time.now + 5 * 60
        run
      end
      button "Long Break" do
        @time_to_stop = Time.now + 15 * 60
        run
      end
      button "Stop" do
        stop
      end
    end
    flow :align => "center" do
      @label = para "Press start."
    end
  end

  def run
    @stopped = false
    every 1 do
      return if @stopped
      tick
      if Time.now > @time_to_stop
        stop
      end
    end
  end

  def stop
    @stopped = true
    @label.replace "Done!"
  end

  def tick
    time_remaining = @time_to_stop - Time.now
    minutes = (time_remaining / 60).floor
    seconds = (time_remaining % 60).floor
    @label.replace "#{minutes}:#{seconds} remaining."
  end
end