| // Copyright 2007 The Closure Library Authors. All Rights Reserved. |
| // |
| // 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. |
| |
| /** |
| * @fileoverview Menu item observing the filter text in a |
| * {@link goog.ui.FilteredMenu}. The observer method is called when the filter |
| * text changes and allows the menu item to update its content and state based |
| * on the filter. |
| * |
| * @author eae@google.com (Emil A Eklund) |
| */ |
| |
| goog.provide('goog.ui.FilterObservingMenuItem'); |
| |
| goog.require('goog.ui.FilterObservingMenuItemRenderer'); |
| goog.require('goog.ui.MenuItem'); |
| goog.require('goog.ui.registry'); |
| |
| |
| |
| /** |
| * Class representing a filter observing menu item. |
| * |
| * @param {goog.ui.ControlContent} content Text caption or DOM structure to |
| * display as the content of the item (use to add icons or styling to |
| * menus). |
| * @param {*=} opt_model Data/model associated with the menu item. |
| * @param {goog.dom.DomHelper=} opt_domHelper Optional DOM helper used for |
| * document interactions. |
| * @param {goog.ui.MenuItemRenderer=} opt_renderer Optional renderer. |
| * @constructor |
| * @extends {goog.ui.MenuItem} |
| */ |
| goog.ui.FilterObservingMenuItem = function(content, opt_model, opt_domHelper, |
| opt_renderer) { |
| goog.ui.MenuItem.call(this, content, opt_model, opt_domHelper, |
| opt_renderer || new goog.ui.FilterObservingMenuItemRenderer()); |
| }; |
| goog.inherits(goog.ui.FilterObservingMenuItem, goog.ui.MenuItem); |
| goog.tagUnsealableClass(goog.ui.FilterObservingMenuItem); |
| |
| |
| /** |
| * Function called when the filter text changes. |
| * @type {Function} function(goog.ui.FilterObservingMenuItem, string) |
| * @private |
| */ |
| goog.ui.FilterObservingMenuItem.prototype.observer_ = null; |
| |
| |
| /** @override */ |
| goog.ui.FilterObservingMenuItem.prototype.enterDocument = function() { |
| goog.ui.FilterObservingMenuItem.superClass_.enterDocument.call(this); |
| this.callObserver(); |
| }; |
| |
| |
| /** |
| * Sets the observer functions. |
| * @param {Function} f function(goog.ui.FilterObservingMenuItem, string). |
| */ |
| goog.ui.FilterObservingMenuItem.prototype.setObserver = function(f) { |
| this.observer_ = f; |
| this.callObserver(); |
| }; |
| |
| |
| /** |
| * Calls the observer function if one has been specified. |
| * @param {?string=} opt_str Filter string. |
| */ |
| goog.ui.FilterObservingMenuItem.prototype.callObserver = function(opt_str) { |
| if (this.observer_) { |
| this.observer_(this, opt_str || ''); |
| } |
| }; |
| |
| |
| // Register a decorator factory function for |
| // goog.ui.FilterObservingMenuItemRenderer. |
| goog.ui.registry.setDecoratorByClassName( |
| goog.ui.FilterObservingMenuItemRenderer.CSS_CLASS, |
| function() { |
| // FilterObservingMenuItem defaults to using |
| // FilterObservingMenuItemRenderer. |
| return new goog.ui.FilterObservingMenuItem(null); |
| }); |