ES6 Angular PubSub - Service

'use strict';
/*jshint esnext: true */

class ToolsService {
    
    constructor($rootScope) {
        this.rootScope = $rootScope;
        this.brushRadius = 1;
        this.brushRadiusSetMessage = 'brushRadiusSetMessage';
    }

    set brushRadius(radius) {
        this.rootScope.$broadcast(this.brushRadiusSetMessage, radius);
    }
    
    onBrushRadiusSet($scope, handler) {
        $scope.$on(this.brushRadiusSetMessage, function(event, radius) {
            handler(radius);
        });
    }
}

ToolsService.$inject = ['$rootScope'];

export default ToolsService;

ES6 Angular PubSub - Subscription in Controller

'use strict';
/*jshint esnext: true */

class MainController {
  constructor ($scope, $window, $document, toolsService) {
    this.radius = 10;    
    toolsService.onBrushRadiusSet($scope, r => this.radius = r);
  }
}

PubSub events in Angular 1.x with ES6. Modeled after: http://eburley.github.io/2013/01/31/angularjs-watch-pub-sub-best-practices.html