Backbone Todo

Make backbone todo

by erick

HTML

<script src="http://documentcloud.github.com/underscore/underscore.js"></script>
<script src="http://documentcloud.github.com/backbone/backbone.js"></script>
<script src="https://raw.github.com/amccloud/backbone-bindings/master/backbone-bindings.js"></script>
<script src="https://github.com/jeromegn/Backbone.localStorage/raw/master/backbone.localStorage-min.js"></script>
<div id="todo">
    <input id="create-todo" type="text" placeholder="What do you have todo?">
    <script id="todo-view" type="text/template">
        <div class="controls">
            <span class="grip" title="Drag to prioritize">&mdash; &mdash; &mdash;</span>
            <input name="completed" type="checkbox" title="Mark completed">
        </div>
        <div class="title"><input name="title" type="text" title="Click to edit"></div>
        <button class="remove" title="Remove todo">x</button>
    </script>
</div>

CSS

* {
  font-size: 14px;
  margin: 0px;
  padding: 0px;
  outline: none;
}
body {
  background: #222;
  font-family: Helvetica, arial;
}
div#todo {
  overflow: hidden;
}
div#todo input#create-todo {
  background: #000;
  border: none;
  padding: 10px;
  width: 100%;
}
div#todo input#create-todo:focus {
  color: #fff;
}
div#todo ul.todo-list {
  list-style: none;
  padding: 0px;
}
div#todo ul.todo-list li {
  background: #fff;
  border-bottom: 1px solid rgba(0, 0, 0, 0.2);
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  cursor: move;
  height: 37px;
  zoom: 1;
}
div#todo ul.todo-list li:after {
  display: block;
  visibility: hidden;
  height: 0;
  clear: both;
  content: ".";
}
div#todo ul.todo-list li input[name="completed"] {
  margin-left: 10px;
}
div#todo ul.todo-list li input[name="title"] {
  background: none;
  border: none;
  font-weight: bold;
  float: left;
  margin: 10px 0px 10px 5px;
  width: 100%;
}
div#todo ul.todo-list li button.remove {
  background: #000;
  border: none;
  color: #fff;
  cursor: pointer;
  font-weight: bold;
  float: right;
  height: 39px;
  padding: 0px 20px 0px 10px;
  position: relative;
  top: -1px;
  visibility: hidden;
}
div#todo ul.todo-list li button.remove:hover {
  color: #f00;
}
div#todo ul.todo-list li div.controls {
  float: left;
  padding: 10px 0px;
}
div#todo ul.todo-list li span.grip {
  color: rgba(0, 0, 0, 0.3);
  display: inline-block;
  font-weight: bold;
  line-height: 4px;
  margin-left: 5px;
  width: 10px;
}
div#todo ul.todo-list li div.title {
  padding: 0px 45px;
}
div#todo ul.todo-list li:hover button.remove {
  visibility: visible;
}
div#todo ul.todo-list li:hover span.grip {
  color: #000;
}
div#todo ul.todo-list li.ui-sortable-helper {
  border-top: 1px solid rgba(0, 0, 0, 0.3);
}
div#todo ul.todo-list li.ui-sortable-helper button.remove {
  visibility: hidden;
}
div#todo ul.todo-list li.completed input[name="title"] {
  color: rgba(0, 0, 0, 0.4);
  text-decoration: line-through;
}
div#todo...

JavaScript

var completedClassTransformer = function(value) {
    return (value) ? 'completed' : 'todo';
};

var priorityTransformer = function(value) {
    return 'hsl(' + (value * 5) + ', 95%, 55%)';
};

var Todo = Backbone.Model.extend({
    defaults: {
        title: "",
        position: 0,
        complete: false
    },
    validate: function(attrs) {
        if (!attrs.title || attrs.title === "")
            return "error";
    }
});

var Todos = Backbone.Collection.extend({
    localStorage: new Backbone.LocalStorage('Todos'),
    model: Todo,

    comparator: function(todo) {
        return -todo.get('position');
    }
});

var TodoView = Backbone.View.extend({
    tagName: 'li',
    bindings: {
        'data-id': 'id',
        'class': ['completed', completedClassTransformer],
        'checked input[name="completed"]': 'completed',
        'readonly input[name="title"]': 'completed',
        'value input[name="title"]': 'title',
        'background-color': ['position', priorityTransformer]
    },
    events: {
        'click button.remove': 'remove',
        'keydown input[name="title"]': 'saveOnEnter'
    },

    initialize: function() {
        _.bindAll(this, 'saveOnEnter', 'save', 'remove', 'destroy', 'template', 'render');
        this.model.on('change', this.save);
        this.model.on('remove', this.destroy);
    },
    saveOnEnter: function(event) {
        if (event.which != 13)
            return;

        $(event.currentTarget).blur();

        this.save();
    },
    save: function() {
        this.model.save();
    },
    remove: function() {
        this.model.destroy();
    },
    destroy: function() {
        this.$el.addClass('destroyed').slideUp(200, function() {
            $(this).remove();
        });
    },
    template: function() {
        return $('#todo-view').html();
    },
    render: function() {
        this.$el.html(this.template());
        return this.bindModel();
    }
});

var TodoListView = Backbone.View.extend({
    tagName:...