todomvc/examples/yui/js/views/todoview.js

> Helping you select an MV\* framework

/*global YUI*/

YUI.add('todo-view', function (Y) {
	'use strict';

	// -- Todo View -------------------
	var TodoView = Y.Base.create('todoView', Y.View, [], {

		// The container element that the View is rendered under.
		containerTemplate: '<li>',

		// Compile our template using Handlebars.
		template: Y.Handlebars.compile(Y.one('#item-template').getHTML()),

		// Bind DOM events for handling changes to a specific Todo,
		// for completion and editing.
		events: {
			'.toggle': {
				click: 'toggleComplete'
			},
			'label': {
				dblclick: 'edit'
			},
			'.edit': {
				blur: 'close',
				keypress: 'enterUpdate'
			},
			'.destroy': {
				click: 'clear'
			}
		},

		// Initialize this view by setting event handlers when the Model
		// is updated or destroyed.
		initializer: function () {
			var model = this.get('model');
			model.after('change', this.render, this);
		},

		// Render this view in our <li> container, and fill it with the
		// data in our Model.
		render: function () {
			var container = this.get('container');
			var model = this.get('model');

			container.setHTML(this.template(model.toJSON()));
			container.toggleClass('completed', model.get('completed'));

			this.set('inputNode', container.one('.edit'));

			return this;
		},

		// Toggle the linked Todo's completion status.
		toggleComplete: function () {
			this.get('model').toggle();
		},

		// Turn on editing mode for the Todo by exposing the input field.
		edit: function () {
			var input = this.get('inputNode');

			this.get('container').addClass('editing');
			// place cursor at the end of the line
			input._node.value = input._node.value;
			input.focus();
		},

		// Get the value from our input field while hiding it, and
		// save it to our Todo when focus is lost from the field.
		close: function () {
			var editedValue = this.get('inputNode').get('value');

			this.get('container').removeClass('editing');

			if (editedValue) {
				this.get('model').save({title: editedValue});
			} else {
				this.clear();
			}
		},

		// Also allow updating the Todo's text through the enter key.
		enterUpdate: function (e) {
			var ENTER_KEY = 13;
			if (e.keyCode === ENTER_KEY) {
				this.close();
			}
		},

		// Destroy the model when the delete button is clicked.
		clear: function () {
			this.get('model').clear();
		}
	});

	// Set this View under our custom Y.TodoMVC namespace.
	Y.namespace('TodoMVC').TodoView = TodoView;
}, '@VERSION@', {
	requires: [
		'view',
		'handlebars',
		'event-focus'
	]
});