13:32f98d0cd21b
Anton Shestakov <engored@ya.ru>, Thu, 21 Mar 2013 15:30:18 +0900
Works with Underscore 1.4.4.
next change 14:01b83171cef5
previous change 7:6a4073144143

demo.html

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<!DOCTYPE html>
<html>
  <head>
    <title>Shard Demo</title>
    <link href="http://netdna.bootstrapcdn.com/twitter-bootstrap/2.2.2/css/bootstrap-combined.min.css" rel="stylesheet">
    
    <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
    <script src="http://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.4.4/underscore-min.js"></script>
    <script src="http://cdnjs.cloudflare.com/ajax/libs/backbone.js/0.9.2/backbone-min.js"></script>
    
    <script src="backbone.shard.js"></script>
  </head>
  <body>
    <div class="row-fluid">
      <div class="span3 offset5">
        <h3>Books</h3>
        <div id="collection"></div>
      </div>
    </div>
    
    <div class="row-fluid">
      <div class="span3 offset3">
        <h3>Read</h3>
        <div id="subset-read" class="centered"></div>
      </div>
      <div class="span3 offset1">
        <h3>Unread</h3>
        <div id="subset-unread" class="centered"></div>
      </div>
    </div>
    
    <script>
      var Book = Backbone.Model;
      var col = new Backbone.Collection([
        new Book({title: 'Crime and Punishment', read: true}),
        new Book({title: 'Robinson Crusoe', read: true}),
        new Book({title: 'Moby Dick', read: false}),
        new Book({title: 'The Catcher in the Rye', read: false})
      ]);
      
      var CollectionView = Backbone.View.extend({
        initialize: function(options) {
          this.collection.on('add change remove reset', this.render, this);
          this.render();
        },
        
        render: function() {
          this.$el.empty();
          this.collection.each(this.appendItem, this);
        },
        
        appendItem: function(item) {
          var $cb = $('<input>').attr('type', 'checkbox').prop('checked', item.get('read'));
          var $label = $('<label>').addClass('checkbox').text(item.get('title')).prepend($cb);
          this.$el.append($label);
          
          $cb.change(function() {
            item.set('read', this.checked);
          });
        }
      });
      
      var shardRead = new Backbone.Shard({collection: col, filter: function(book) { return book.get('read'); } });
      var shardUnread = new Backbone.Shard({collection: col, filter: function(book) { return !book.get('read'); } });
      
      new CollectionView({
        el: $('#collection'),
        collection: col
      });
      
      new CollectionView({
        el: $('#subset-unread'),
        collection: shardUnread
      });
      
      new CollectionView({
        el: $('#subset-read'),
        collection: shardRead
      });
    </script>
  </body>
</html>