AngularJS Event-Channel (slides (here) [http://slides.com/michael_hladky/event-channel#/] )

myChannel.js

.config('myEvents', function() {
  valueChanged : 'valueChanged'
});

.service('myChannel', function($rootScope, myEvents) {

  var publishValueChanged = function (newVlaue) {
    var args = {value: newVlaue};
	  $rootScope.$emit(myEvents.valueChanged, args);
  };
	
  var onValueChanged = function($scope, handler) {
	  var unsubToValueChanged = $rootScope.$on(myEvents.valueChanged, function(event, args) {
	    handler(args.value);
    });
    
    $scope.$on('$destroy', function() {
      unsubToValueChanged();
    });
  };

  return {
    publishValueChanged	: publishValueChanged,
    onValueChanged		: onValueChanged
  };
	
});