AngularJS - Communication Between Controllers

This is an example of how to use a custom service to facilitate communicate between multiple controllers using $rootscope as an event bus.

by Blueprinter

HTML

<script src="http://code.angularjs.org/angular-1.0.0rc9.js"></script>
<div ng-controller="ControllerZero">
    <input ng-model="message" >
    <button ng-click="handleClick(message);">LOG</button>
</div>

<div ng-controller="ControllerOne">
    <input ng-model="message" >
</div>

<div ng-controller="ControllerTwo">
    <input ng-model="message" >
</div>

JavaScript

var myModule = angular.module('myModule', []);
myModule.factory('mySharedService', function($rootScope) {
    var sharedService = {};
    
    sharedService.message = '';

    sharedService.prepForBroadcast = function(msg) {
        this.message = msg;
        this.broadcastItem();
    };

    sharedService.broadcastItem = function() {
        $rootScope.$broadcast('handleBroadcast');
    };

    return sharedService;
});

function ControllerZero($scope, sharedService) {
    $scope.handleClick = function(msg) {
        sharedService.prepForBroadcast(msg);
    };
        
    $scope.$on('handleBroadcast', function() {
        $scope.message = sharedService.message;
    });        
}

function ControllerOne($scope, sharedService) {
    $scope.$on('handleBroadcast', function() {
        $scope.message = 'ONE: ' + sharedService.message;
    });        
}

function ControllerTwo($scope, sharedService) {
    $scope.$on('handleBroadcast', function() {
        $scope.message = 'TWO: ' + sharedService.message;
    });
}

ControllerZero.$inject = ['$scope', 'mySharedService'];        
        
ControllerOne.$inject = ['$scope', 'mySharedService'];

ControllerTwo.$inject = ['$scope', 'mySharedService'];