   key_space = 32
   key_home = 36
   key_left_arrow = 37
+  key_up_arrow = 38
   key_right_arrow = 39
+  key_down_arrow = 40
   key_A = 65
   key_C = 67
   key_D = 68

      when key_tab
        new_focus = if e.shiftKey then @active_display.previous_display() else @active_display.next_display()
        this.set_active_display(new_focus)
      when key_home        then this._fake_click_down(@dom_handler.reset)
      when key_left_arrow  then this._fake_click_down(@dom_handler.prev)
      when key_right_arrow then this._fake_click_down(@dom_handler.next)
      when key_space       then this._fake_click_down(@dom_handler.active_play_or_pause)
      when key_C then this._rotate('up', 1)
      when key_Z then this._rotate('up',-1)

    unhandled = false

    switch e.keyCode
      when key_home, key_left_arrow, key_right_arrow, key_space
        if @down_button
          this._fake_click_up(@down_button)
          @down_button = null
      else
        unhandled = true

