gistfile1.txt

App.MyMixin = Ember.Mixin.create({

 sortedContent: function () {
  //return sorted content
 }.property('content'),

 sortManagerClass: Ember.StateManager.extend({
  defaultState: "none",
  none: Ember.State.extend({
   //define event responses
  }), 
  
  ascending: Ember.State.extend({
   //define event responses
  }),
  
  descending: Ember.State.extend({
   //define event responses
  }),

 }),

});

App.MyController = Ember.ArrayController.extend(App.MyMixin, {

 init: function () {
  this.set('sortManager', this.get('sortManagerClass').create();
 },

});