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I have created a service to isolate the business logic and am injecting it in to the controllers that need the information. What I want to ultimately do is have the controllers be able to watch the values in the service so that I don't have to do broadcast/on notification or a complex message passing solution to have all controllers be notified of changes to the data in the service.
I've created a plnkr demonstrating the basic idea of what I'm trying to do.
http://plnkr.co/edit/oL6AhHq2BBeGCLhAHX0K?p=preview
Is it possible to have a controller watch the values of a service?
396
You were already doing it right. i.e pushing the service into a scope variable and then observing the service as part of the scope variable.
Here is the working solution for you :
http://plnkr.co/edit/SgA0ztPVPxTkA0wfS1HU?p=preview
HTML
<!doctype html>
<html ng-app="plunker" >
<head>
<meta charset="utf-8">
<title>AngularJS Plunker</title>
<script>document.write('<base href="' + document.location + '" />');</script>
<link rel="stylesheet" href="style.css">
<script src="http://code.angularjs.org/1.1.3/angular.js"></script>
<script src="app.js"></script>
</head>
<body ng-controller="MainCtrl">
<button ng-click="start()">Start Count</button>
<button ng-click="stop()">Stop Count</button>
ControllerData: {{controllerData}}
</body>
</html>
Javascript :
var app = angular.module('plunker', []);
app.service('myService', function($rootScope) {
var data = 0;
var id = 0;
var increment = function() {
data = data + 1;
$rootScope.$apply();
console.log("Incrementing data", data);
};
this.start = function() {
id = setInterval(increment, 500) ;
};
this.stop = function() {
clearInterval(id);
};
this.getData = function() { return data; };
}).controller('MainCtrl', function($scope, myService) {
$scope.service = myService;
$scope.controllerData = 0;
$scope.start = function() {
myService.start();
};
$scope.stop = function() {
myService.stop();
};
$scope.$watch('service.getData()', function(newVal) {
console.log("New Data", newVal);
$scope.controllerData = newVal;
});
});
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