AngularJS $rootScope.$apply() attempt (not working, don't copy!)

gistfile1.txt

'use strict';

module.exports = function (module) {

    module.factory('PageEventsService', ['$rootScope', function ($rootScope) {

        return {
            // can't get it to receive :-(
            on: function(event, callback) {
                
                console.log("PageEventsService on");

                var pageEventOn = window.pageEvents.on(event, function (data) {
                
                    console.log(data);
                    
                });

                $rootScope.$apply(pageEventOn);
            },

            // strangely enough, the emit function works
            emit: function(event, callback) {
                console.log("PageEVentService emit");

                var pageEventEmit = window.pageEvents.on(event, function(data) {
                    console.log(data);
                });

                $rootScope.$apply(pageEventEmit);
            }
        }
    }]);
}