| // Copyright 2008 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 Renderer for {@link goog.ui.ColorMenuButton}s. |
| * |
| * @author robbyw@google.com (Robby Walker) |
| * @author attila@google.com (Attila Bodis) |
| */ |
| |
| goog.provide('goog.ui.ColorMenuButtonRenderer'); |
| |
| goog.require('goog.asserts'); |
| goog.require('goog.color'); |
| goog.require('goog.dom.classlist'); |
| goog.require('goog.ui.MenuButtonRenderer'); |
| goog.require('goog.userAgent'); |
| |
| |
| |
| /** |
| * Renderer for {@link goog.ui.ColorMenuButton}s. |
| * @constructor |
| * @extends {goog.ui.MenuButtonRenderer} |
| */ |
| goog.ui.ColorMenuButtonRenderer = function() { |
| goog.ui.MenuButtonRenderer.call(this); |
| }; |
| goog.inherits(goog.ui.ColorMenuButtonRenderer, goog.ui.MenuButtonRenderer); |
| goog.addSingletonGetter(goog.ui.ColorMenuButtonRenderer); |
| |
| |
| /** |
| * Default CSS class to be applied to the root element of components rendered |
| * by this renderer. |
| * @type {string} |
| */ |
| goog.ui.ColorMenuButtonRenderer.CSS_CLASS = |
| goog.getCssName('goog-color-menu-button'); |
| |
| |
| /** |
| * Overrides the superclass implementation by wrapping the caption text or DOM |
| * structure in a color indicator element. Creates the following DOM structure: |
| * <div class="goog-inline-block goog-menu-button-caption"> |
| * <div class="goog-color-menu-button-indicator"> |
| * Contents... |
| * </div> |
| * </div> |
| * The 'goog-color-menu-button-indicator' style should be defined to have a |
| * bottom border of nonzero width and a default color that blends into its |
| * background. |
| * @param {goog.ui.ControlContent} content Text caption or DOM structure. |
| * @param {goog.dom.DomHelper} dom DOM helper, used for document interaction. |
| * @return {Element} Caption element. |
| * @override |
| */ |
| goog.ui.ColorMenuButtonRenderer.prototype.createCaption = function(content, |
| dom) { |
| return goog.ui.ColorMenuButtonRenderer.superClass_.createCaption.call(this, |
| goog.ui.ColorMenuButtonRenderer.wrapCaption(content, dom), dom); |
| }; |
| |
| |
| /** |
| * Wrap a caption in a div with the color-menu-button-indicator CSS class. |
| * @param {goog.ui.ControlContent} content Text caption or DOM structure. |
| * @param {goog.dom.DomHelper} dom DOM helper, used for document interaction. |
| * @return {!Element} Caption element. |
| */ |
| goog.ui.ColorMenuButtonRenderer.wrapCaption = function(content, dom) { |
| return dom.createDom('div', |
| goog.getCssName(goog.ui.ColorMenuButtonRenderer.CSS_CLASS, 'indicator'), |
| content); |
| }; |
| |
| |
| /** |
| * Takes a color menu button control's root element and a value object |
| * (which is assumed to be a color), and updates the button's DOM to reflect |
| * the new color. Overrides {@link goog.ui.ButtonRenderer#setValue}. |
| * @param {Element} element The button control's root element (if rendered). |
| * @param {*} value New value; assumed to be a color spec string. |
| * @override |
| */ |
| goog.ui.ColorMenuButtonRenderer.prototype.setValue = function(element, value) { |
| if (element) { |
| goog.ui.ColorMenuButtonRenderer.setCaptionValue( |
| this.getContentElement(element), value); |
| } |
| }; |
| |
| |
| /** |
| * Takes a control's content element and a value object (which is assumed |
| * to be a color), and updates its DOM to reflect the new color. |
| * @param {Element} caption A content element of a control. |
| * @param {*} value New value; assumed to be a color spec string. |
| */ |
| goog.ui.ColorMenuButtonRenderer.setCaptionValue = function(caption, value) { |
| // Assume that the caption's first child is the indicator. |
| if (caption && caption.firstChild) { |
| // Normalize the value to a hex color spec or null (otherwise setting |
| // borderBottomColor will cause a JS error on IE). |
| var hexColor; |
| |
| var strValue = /** @type {string} */ (value); |
| hexColor = strValue && goog.color.isValidColor(strValue) ? |
| goog.color.parse(strValue).hex : |
| null; |
| |
| // Stupid IE6/7 doesn't do transparent borders. |
| // TODO(attila): Add user-agent version check when IE8 comes out... |
| caption.firstChild.style.borderBottomColor = hexColor || |
| (goog.userAgent.IE ? '' : 'transparent'); |
| } |
| }; |
| |
| |
| /** |
| * Initializes the button's DOM when it enters the document. Overrides the |
| * superclass implementation by making sure the button's color indicator is |
| * initialized. |
| * @param {goog.ui.Control} button goog.ui.ColorMenuButton whose DOM is to be |
| * initialized as it enters the document. |
| * @override |
| */ |
| goog.ui.ColorMenuButtonRenderer.prototype.initializeDom = function(button) { |
| var buttonElement = button.getElement(); |
| goog.asserts.assert(buttonElement); |
| this.setValue(buttonElement, button.getValue()); |
| goog.dom.classlist.add(buttonElement, |
| goog.ui.ColorMenuButtonRenderer.CSS_CLASS); |
| goog.ui.ColorMenuButtonRenderer.superClass_.initializeDom.call(this, |
| button); |
| }; |