##########  List model ##############
class window.List
 show_number: 3

 constructor: (list_data, show_number, model, tracker_id)->
   @list = []
   @show_number = show_number if show_number
   @model = model
   @tracker_elem = $("<input id='#{tracker_id}' type='hidden'>")
   this.setList(list_data)

 getList: -> @list.slice(0, @show_number)

 # use this method to set a new list
 setList: (list_info)->
   @list = []
   this.loadList(list_info)
   @tracker_elem.change()

 setShowNumber: (num)->
   @show_number = num
   @tracker_elem.change()

 # meant for internal use. use setList to set the list with info
 loadList: (list_info)->
   return unless list_info
   list = @list
   model = @model
   $.each( list_info, (index, data)-> list.push(new model(data, index)) )