Java example source code file (app.jsx)

This example Java source code file (app.jsx) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

enter_key, router, todoapp, todofooter, todoitem, what

The app.jsx Java example source code

/*
 *
 *  * Copyright 2015 Skymind,Inc.
 *  *
 *  *    Licensed under the Apache License, Version 2.0 (the "License");
 *  *    you may not use this file except in compliance with the License.
 *  *    You may obtain a copy of the License at
 *  *
 *  *        http://www.apache.org/licenses/LICENSE-2.0
 *  *
 *  *    Unless required by applicable law or agreed to in writing, software
 *  *    distributed under the License is distributed on an "AS IS" BASIS,
 *  *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  *    See the License for the specific language governing permissions and
 *  *    limitations under the License.
 *
 */

/*jshint quotmark:false */
/*jshint white:false */
/*jshint trailing:false */
/*jshint newcap:false */
/*global React, Router*/
var app = app || {};

(function () {
	'use strict';

	app.ALL_TODOS = 'all';
	app.ACTIVE_TODOS = 'active';
	app.COMPLETED_TODOS = 'completed';
	var TodoFooter = app.TodoFooter;
	var TodoItem = app.TodoItem;

	var ENTER_KEY = 13;

	var TodoApp = React.createClass({
		getInitialState: function () {
			return {
				nowShowing: app.ALL_TODOS,
				editing: null
			};
		},

		componentDidMount: function () {
			var setState = this.setState;
			var router = Router({
				'/': setState.bind(this, {nowShowing: app.ALL_TODOS}),
				'/active': setState.bind(this, {nowShowing: app.ACTIVE_TODOS}),
				'/completed': setState.bind(this, {nowShowing: app.COMPLETED_TODOS})
			});
			router.init('/');
		},

		handleNewTodoKeyDown: function (event) {
			if (event.which !== ENTER_KEY) {
				return;
			}

			event.preventDefault();

			var val = this.refs.newField.getDOMNode().value.trim();

			if (val) {
				this.props.model.addTodo(val);
				this.refs.newField.getDOMNode().value = '';
			}
		},

		toggleAll: function (event) {
			var checked = event.target.checked;
			this.props.model.toggleAll(checked);
		},

		toggle: function (todoToToggle) {
			this.props.model.toggle(todoToToggle);
		},

		destroy: function (todo) {
			this.props.model.destroy(todo);
		},

		edit: function (todo) {
			this.setState({editing: todo.id});
		},

		save: function (todoToSave, text) {
			this.props.model.save(todoToSave, text);
			this.setState({editing: null});
		},

		cancel: function () {
			this.setState({editing: null});
		},

		clearCompleted: function () {
			this.props.model.clearCompleted();
		},

		render: function () {
			var footer;
			var main;
			var todos = this.props.model.todos;

			var shownTodos = todos.filter(function (todo) {
				switch (this.state.nowShowing) {
				case app.ACTIVE_TODOS:
					return !todo.completed;
				case app.COMPLETED_TODOS:
					return todo.completed;
				default:
					return true;
				}
			}, this);

			var todoItems = shownTodos.map(function (todo) {
				return (
					<TodoItem
						key={todo.id}
						todo={todo}
						onToggle={this.toggle.bind(this, todo)}
						onDestroy={this.destroy.bind(this, todo)}
						onEdit={this.edit.bind(this, todo)}
						editing={this.state.editing === todo.id}
						onSave={this.save.bind(this, todo)}
						onCancel={this.cancel}
					/>
				);
			}, this);

			var activeTodoCount = todos.reduce(function (accum, todo) {
				return todo.completed ? accum : accum + 1;
			}, 0);

			var completedCount = todos.length - activeTodoCount;

			if (activeTodoCount || completedCount) {
				footer =
					<TodoFooter
						count={activeTodoCount}
						completedCount={completedCount}
						nowShowing={this.state.nowShowing}
						onClearCompleted={this.clearCompleted}
					/>;
			}

			if (todos.length) {
				main = (
					<section id="main">
						<input
							id="toggle-all"
							type="checkbox"
							onChange={this.toggleAll}
							checked={activeTodoCount === 0}
						/>
						<ul id="todo-list">
							{todoItems}
						</ul>
					</section>
				);
			}

			return (
				<div>
					<header id="header">
						<h1>todos
						<input
							ref="newField"
							id="new-todo"
							placeholder="What needs to be done?"
							onKeyDown={this.handleNewTodoKeyDown}
							autoFocus={true}
						/>
					</header>
					{main}
					{footer}
				</div>
			);
		}
	});

	var model = new app.TodoModel('react-todos');

	function render() {
		React.render(
			<TodoApp model={model}/>,
			document.getElementById('todoapp')
		);
	}

	model.subscribe(render);
	render();
})();