| <!DOCTYPE html> |
| <!-- |
| Copyright (c) 2014 The Chromium Authors. All rights reserved. |
| Use of this source code is governed by a BSD-style license that can be |
| found in the LICENSE file. |
| --> |
| |
| <link rel="import" href="/base/event_target.html"> |
| |
| <script> |
| 'use strict'; |
| |
| tr.exportTo('tr.b', function() { |
| var Event; |
| if (tr.isHeadless) { |
| /** |
| * Creates a new event to be used with tr.b.EventTarget or DOM EventTarget |
| * objects. |
| * @param {string} type The name of the event. |
| * @param {boolean=} opt_bubbles Whether the event bubbles. |
| * Default is false. |
| * @param {boolean=} opt_preventable Whether the default action of the event |
| * can be prevented. |
| * @constructor |
| * @extends {Event} |
| */ |
| function HeadlessEvent(type, opt_bubbles, opt_preventable) { |
| this.type = type; |
| this.bubbles = (opt_bubbles !== undefined ? |
| !!opt_bubbles : false); |
| this.cancelable = (opt_preventable !== undefined ? |
| !!opt_preventable : false); |
| |
| this.defaultPrevented = false; |
| this.cancelBubble = false; |
| }; |
| |
| HeadlessEvent.prototype = { |
| preventDefault: function() { |
| this.defaultPrevented = true; |
| }, |
| |
| stopPropagation: function() { |
| this.cancelBubble = true; |
| } |
| }; |
| Event = HeadlessEvent; |
| } else { |
| /** |
| * Creates a new event to be used with tr.b.EventTarget or DOM EventTarget |
| * objects. |
| * @param {string} type The name of the event. |
| * @param {boolean=} opt_bubbles Whether the event bubbles. |
| * Default is false. |
| * @param {boolean=} opt_preventable Whether the default action of the event |
| * can be prevented. |
| * @constructor |
| * @extends {Event} |
| */ |
| function TrEvent(type, opt_bubbles, opt_preventable) { |
| var e = tr.doc.createEvent('Event'); |
| e.initEvent(type, !!opt_bubbles, !!opt_preventable); |
| e.__proto__ = global.Event.prototype; |
| return e; |
| }; |
| |
| TrEvent.prototype = { |
| __proto__: global.Event.prototype |
| }; |
| Event = TrEvent; |
| } |
| |
| /** |
| * Dispatches a simple event on an event target. |
| * @param {!EventTarget} target The event target to dispatch the event on. |
| * @param {string} type The type of the event. |
| * @param {boolean=} opt_bubbles Whether the event bubbles or not. |
| * @param {boolean=} opt_cancelable Whether the default action of the event |
| * can be prevented. |
| * @return {boolean} If any of the listeners called {@code preventDefault} |
| * during the dispatch this will return false. |
| */ |
| function dispatchSimpleEvent(target, type, opt_bubbles, opt_cancelable) { |
| var e = new tr.b.Event(type, opt_bubbles, opt_cancelable); |
| return target.dispatchEvent(e); |
| } |
| |
| return { |
| Event: Event, |
| dispatchSimpleEvent: dispatchSimpleEvent |
| }; |
| }); |
| </script> |
