Important things to remember:
1. Usually, we create Collection, CollectionViews, Model, View.
Collection <--> CollectionViews
Moel <--> View
2. Application can start from CollectionView or View by creating other instance.
3. Uisng a grobel App object to control everything.
4. CollectionView: the function is to render grobel interface and existing data to
the html. In initialize function, to create instance object of collection, and listen to events.
Events is model events! And don't forget calling render() fucnton.!
5. Collection just pass a model object.
6. Single modle is to fetch data and set defaults data.
7. Single view is to create tag, listenTo model events. Create user generate events{}.
(function(){ var App = { Collections : {}, Models : {}, Views : {} }; App.Models.ToDoItem = Backbone.Model.extend({ defaults:{firstName: "Zhentian", lastName: "Wan"} }); App.Views.ToDoItem = Backbone.View.extend({ tagName: 'li', initialize: function(){ _.bindAll(this, 'render', 'swap', 'remove', 'unrender'); this.listenTo(this.model, 'change', this.render); this.listenTo(this.model, 'remove', this.unrender); }, events: { 'click span.swap': 'swap', 'click span.delete': 'remove' }, render: function(){ this.$el.html('<span style="color:black;">'+this.model.get('firstName')+' '+this.model.get('lastName')+'</span> <span class="swap" style="font-family:sans-serif; color:blue; cursor:pointer;">[swap]</span> <span class="delete" style="cursor:pointer; color:red; font-family:sans-serif;">[delete]</span>'); return this; }, swap: function(){ var swapped = { firstName: this.model.get('lastName'), lastName: this.model.get('firstName') }; this.model.set(swapped); }, remove: function(){ this.model.destroy(); }, unrender: function(){ this.$el.remove(); } }); App.Collections.ToDoList = Backbone.Collection.extend({model: App.Models.ToDoItem}); App.Views.ListView = new (Backbone.View.extend({ el: $('body'), initialize: function(){ _.bindAll(this, 'render', 'appendItem', 'addItem'); this.collection = new App.Collections.ToDoList(); this.listenTo(this.collection, 'add', this.appendItem); this.render(); this.counter = 0; }, events:{ 'click button#add': 'addItem' }, render: function(){ this.$el.html('<button id="add">Click to add</button><ul></ul>'); return this; }, addItem: function(){ var item = new App.Models.ToDoItem(); item.set({lastName: 'Yoona'+' '+(++this.counter)}); this.collection.add(item); }, appendItem: function(item){ var itemView = new App.Views.ToDoItem({model: item}); $('ul', this.el).append(itemView.render().el); } }))(); })();
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