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// Copyright 2010 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 An alternative imageless button renderer that uses CSS3 rather
* than voodoo to render custom buttons with rounded corners and dimensionality
* (via a subtle flat shadow on the bottom half of the button) without the use
* of images.
*
* Based on the Custom Buttons 3.1 visual specification, see
* http://go/custombuttons
*
* Tested and verified to work in Gecko 1.9.2+ and WebKit 528+.
*
* @author eae@google.com (Emil A Eklund)
* @author slightlyoff@google.com (Alex Russell)
* @see ../demos/css3button.html
*/
goog.provide('goog.ui.Css3ButtonRenderer');
goog.require('goog.dom');
goog.require('goog.dom.TagName');
goog.require('goog.dom.classes');
goog.require('goog.ui.Button');
goog.require('goog.ui.ButtonRenderer');
goog.require('goog.ui.ControlContent');
goog.require('goog.ui.INLINE_BLOCK_CLASSNAME');
goog.require('goog.ui.registry');
/**
* Custom renderer for {@link goog.ui.Button}s. Css3 buttons can contain
* almost arbitrary HTML content, will flow like inline elements, but can be
* styled like block-level elements.
*
* @constructor
* @extends {goog.ui.ButtonRenderer}
*/
goog.ui.Css3ButtonRenderer = function() {
goog.ui.ButtonRenderer.call(this);
};
goog.inherits(goog.ui.Css3ButtonRenderer, goog.ui.ButtonRenderer);
/**
* The singleton instance of this renderer class.
* @type {goog.ui.Css3ButtonRenderer?}
* @private
*/
goog.ui.Css3ButtonRenderer.instance_ = null;
goog.addSingletonGetter(goog.ui.Css3ButtonRenderer);
/**
* Default CSS class to be applied to the root element of components rendered
* by this renderer.
* @type {string}
*/
goog.ui.Css3ButtonRenderer.CSS_CLASS = goog.getCssName('goog-css3-button');
/** @override */
goog.ui.Css3ButtonRenderer.prototype.getContentElement = function(element) {
return /** @type {Element} */ (element);
};
/**
* Returns the button's contents wrapped in the following DOM structure:
* <div class="goog-inline-block goog-css3-button">
* Contents...
* </div>
* Overrides {@link goog.ui.ButtonRenderer#createDom}.
* @param {goog.ui.Control} control goog.ui.Button to render.
* @return {Element} Root element for the button.
* @override
*/
goog.ui.Css3ButtonRenderer.prototype.createDom = function(control) {
var button = /** @type {goog.ui.Button} */ (control);
var classNames = this.getClassNames(button);
var attr = {
'class': goog.ui.INLINE_BLOCK_CLASSNAME + ' ' + classNames.join(' '),
'title': button.getTooltip() || ''
};
return button.getDomHelper().createDom('div', attr, button.getContent());
};
/**
* Returns true if this renderer can decorate the element. Overrides
* {@link goog.ui.ButtonRenderer#canDecorate} by returning true if the
* element is a DIV, false otherwise.
* @param {Element} element Element to decorate.
* @return {boolean} Whether the renderer can decorate the element.
* @override
*/
goog.ui.Css3ButtonRenderer.prototype.canDecorate = function(element) {
return element.tagName == goog.dom.TagName.DIV;
};
/** @override */
goog.ui.Css3ButtonRenderer.prototype.decorate = function(button, element) {
goog.dom.classes.add(element, goog.ui.INLINE_BLOCK_CLASSNAME,
this.getCssClass());
return goog.ui.Css3ButtonRenderer.superClass_.decorate.call(this, button,
element);
};
/**
* 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.Css3ButtonRenderer.prototype.getCssClass = function() {
return goog.ui.Css3ButtonRenderer.CSS_CLASS;
};
// Register a decorator factory function for goog.ui.Css3ButtonRenderer.
goog.ui.registry.setDecoratorByClassName(
goog.ui.Css3ButtonRenderer.CSS_CLASS,
function() {
return new goog.ui.Button(null,
goog.ui.Css3ButtonRenderer.getInstance());
});
// Register a decorator factory function for toggle buttons using the
// goog.ui.Css3ButtonRenderer.
goog.ui.registry.setDecoratorByClassName(
goog.getCssName('goog-css3-toggle-button'),
function() {
var button = new goog.ui.Button(null,
goog.ui.Css3ButtonRenderer.getInstance());
button.setSupportedState(goog.ui.Component.State.CHECKED, true);
return button;
});
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