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// 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 Similiar functionality of {@link goog.ui.MenuButtonRenderer},
* but inherits from {@link goog.ui.FlatButtonRenderer} instead of
* {@link goog.ui.CustomButtonRenderer}. This creates a simpler menu button
* that will look more like a traditional <select> menu.
*
*/
goog.provide('goog.ui.FlatMenuButtonRenderer');
goog.require('goog.style');
goog.require('goog.ui.ControlContent');
goog.require('goog.ui.FlatButtonRenderer');
goog.require('goog.ui.INLINE_BLOCK_CLASSNAME');
goog.require('goog.ui.Menu');
goog.require('goog.ui.MenuButton');
goog.require('goog.ui.MenuRenderer');
goog.require('goog.ui.registry');
/**
* Flat Menu Button renderer. Creates a simpler version of
* {@link goog.ui.MenuButton} that doesn't look like a button and
* doesn't have rounded corners. Uses just a <div> and looks more like
* a traditional <select> element.
* @constructor
* @extends {goog.ui.FlatButtonRenderer}
*/
goog.ui.FlatMenuButtonRenderer = function() {
goog.ui.FlatButtonRenderer.call(this);
};
goog.inherits(goog.ui.FlatMenuButtonRenderer, goog.ui.FlatButtonRenderer);
goog.addSingletonGetter(goog.ui.FlatMenuButtonRenderer);
/**
* Default CSS class to be applied to the root element of components rendered
* by this renderer.
* @type {string}
*/
goog.ui.FlatMenuButtonRenderer.CSS_CLASS =
goog.getCssName('goog-flat-menu-button');
/**
* Returns the button's contents wrapped in the following DOM structure:
* <div class="goog-inline-block goog-flat-menu-button">
* <div class="goog-inline-block goog-flat-menu-button-caption">
* Contents...
* </div>
* <div class="goog-inline-block goog-flat-menu-button-dropdown">
*
* </div>
* </div>
* Overrides {@link goog.ui.FlatButtonRenderer#createDom}.
* @param {goog.ui.Control} control Button to render.
* @return {Element} Root element for the button.
* @override
*/
goog.ui.FlatMenuButtonRenderer.prototype.createDom = function(control) {
var button = /** @type {goog.ui.Button} */ (control);
var classNames = this.getClassNames(button);
var attributes = {
'class': goog.ui.INLINE_BLOCK_CLASSNAME + ' ' + classNames.join(' '),
'title': button.getTooltip() || ''
};
return button.getDomHelper().createDom('div', attributes,
[this.createCaption(button.getContent(), button.getDomHelper()),
this.createDropdown(button.getDomHelper())]);
};
/**
* Takes the button's root element and returns the parent element of the
* button's contents.
* @param {Element} element Root element of the button whose content
* element is to be returned.
* @return {Element} The button's content element (if any).
* @override
*/
goog.ui.FlatMenuButtonRenderer.prototype.getContentElement = function(element) {
return element && /** @type {Element} */ (element.firstChild);
};
/**
* Takes an element, decorates it with the menu button control, and returns
* the element. Overrides {@link goog.ui.CustomButtonRenderer#decorate} by
* looking for a child element that can be decorated by a menu, and if it
* finds one, decorates it and attaches it to the menu button.
* @param {goog.ui.Control} button Menu button to decorate the element.
* @param {Element} element Element to decorate.
* @return {Element} Decorated element.
* @override
*/
goog.ui.FlatMenuButtonRenderer.prototype.decorate = function(button, element) {
// TODO(user): MenuButtonRenderer uses the exact same code.
// Refactor this block to its own module where both can use it.
var menuElem = goog.dom.getElementsByTagNameAndClass(
'*', goog.ui.MenuRenderer.CSS_CLASS, element)[0];
if (menuElem) {
// Move the menu element directly under the body, but hide it first; see
// bug 1089244.
goog.style.showElement(menuElem, false);
button.getDomHelper().getDocument().body.appendChild(menuElem);
// Decorate the menu and attach it to the button.
var menu = new goog.ui.Menu();
menu.decorate(menuElem);
button.setMenu(menu);
}
// Add the caption if it's not already there.
var captionElem = goog.dom.getElementsByTagNameAndClass(
'*', goog.getCssName(this.getCssClass(), 'caption'), element)[0];
if (!captionElem) {
element.appendChild(
this.createCaption(element.childNodes, button.getDomHelper()));
}
// Add the dropdown icon if it's not already there.
var dropdownElem = goog.dom.getElementsByTagNameAndClass(
'*', goog.getCssName(this.getCssClass(), 'dropdown'), element)[0];
if (!dropdownElem) {
element.appendChild(this.createDropdown(button.getDomHelper()));
}
// Let the superclass do the rest.
return goog.ui.FlatMenuButtonRenderer.superClass_.decorate.call(this, button,
element);
};
/**
* Takes a text caption or existing DOM structure, and returns it wrapped in
* an appropriately-styled DIV. Creates the following DOM structure:
* <div class="goog-inline-block goog-flat-menu-button-caption">
* Contents...
* </div>
* @param {goog.ui.ControlContent} content Text caption or DOM structure to wrap
* in a box.
* @param {goog.dom.DomHelper} dom DOM helper, used for document interaction.
* @return {Element} Caption element.
*/
goog.ui.FlatMenuButtonRenderer.prototype.createCaption = function(content,
dom) {
return dom.createDom('div',
goog.ui.INLINE_BLOCK_CLASSNAME + ' ' +
goog.getCssName(this.getCssClass(), 'caption'), content);
};
/**
* Returns an appropriately-styled DIV containing a dropdown arrow element.
* Creates the following DOM structure:
* <div class="goog-inline-block goog-flat-menu-button-dropdown">
*
* </div>
* @param {goog.dom.DomHelper} dom DOM helper, used for document interaction.
* @return {Element} Dropdown element.
*/
goog.ui.FlatMenuButtonRenderer.prototype.createDropdown = function(dom) {
// 00A0 is
return dom.createDom('div',
goog.ui.INLINE_BLOCK_CLASSNAME + ' ' +
goog.getCssName(this.getCssClass(), 'dropdown'), '\u00A0');
};
/**
* Returns the CSS class to be applied to the root element of components
* rendered using this renderer.
* @return {string} Renderer-specific CSS class.
* @override
*/
goog.ui.FlatMenuButtonRenderer.prototype.getCssClass = function() {
return goog.ui.FlatMenuButtonRenderer.CSS_CLASS;
};
// Register a decorator factory function for Flat Menu Buttons.
goog.ui.registry.setDecoratorByClassName(
goog.ui.FlatMenuButtonRenderer.CSS_CLASS,
function() {
// Uses goog.ui.MenuButton, but with FlatMenuButtonRenderer.
return new goog.ui.MenuButton(null, null,
goog.ui.FlatMenuButtonRenderer.getInstance());
});
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