Created
December 19, 2013 02:04
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| input, label { | |
| display: block | |
| } |
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| <!doctype html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <title>Ember.js property loop</title> | |
| </head> | |
| <body> | |
| <script type="text/x-handlebars" data-template-name="home"> | |
| <h1>Entwined properties</h1> | |
| <p> | |
| In my app I display the price in both Euros and Pounds and need to allow the | |
| user to update either figure. Is this the best way to deal with the | |
| circular dependency? | |
| </p> | |
| <label>Euros</label> | |
| {{input value=euros}} | |
| <label>Pounds</label> | |
| {{input value=pounds}} | |
| </script> | |
| <script src="http://code.jquery.com/jquery-1.10.2.min.js"></script> | |
| <script src="http://builds.handlebarsjs.com.s3.amazonaws.com/handlebars-v1.1.2.js"></script> | |
| <script src="http://builds.emberjs.com/tags/v1.2.0/ember.min.js"></script> | |
| </body> | |
| </html> |
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| window.Blah = Ember.Application.create(); | |
| Blah.Router.map(function () { | |
| this.resource('home', { path: '/' }, function () { | |
| }); | |
| }); | |
| Blah.HomeRoute = Ember.Route.extend({ | |
| setupController: function(controller, model) { | |
| controller.set('pounds', 100); | |
| } | |
| }); | |
| Blah.HomeController = Ember.ObjectController.extend({ | |
| isInternalEuroUpdate: false, | |
| exchangeRate: 1.2, | |
| euros: '', | |
| pounds: function(key, value) { | |
| if (arguments.length === 2) { | |
| this.set('isInternalEuroUpdate', true); | |
| this.set('euros', value * this.get('exchangeRate')); | |
| this.set('isInternalEuroUpdate', false); | |
| } | |
| return value; | |
| }.property('euros'), | |
| euroChange: function(value) { | |
| if (!this.get('isInternalEuroUpdate')) { | |
| this.set('pounds', this.get('euros') / this.get('exchangeRate')); | |
| } | |
| }.observes('euros') | |
| }); |
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