/** * @license * Copyright 2015 Google Inc. 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. */ (function() { 'use strict'; /** * Class constructor for Radio MDL component. * Implements MDL component design pattern defined at: * https://github.com/jasonmayes/mdl-component-design-pattern * * @constructor * @param {HTMLElement} element The element that will be upgraded. */ var MaterialRadio = function MaterialRadio(element) { this.element_ = element; // Initialize instance. this.init(); }; window['MaterialRadio'] = MaterialRadio; /** * Store constants in one place so they can be updated easily. * * @enum {string | number} * @private */ MaterialRadio.prototype.Constant_ = { TINY_TIMEOUT: 0.001 }; /** * Store strings for class names defined by this component that are used in * JavaScript. This allows us to simply change it in one place should we * decide to modify at a later date. * * @enum {string} * @private */ MaterialRadio.prototype.CssClasses_ = { IS_FOCUSED: 'is-focused', IS_DISABLED: 'is-disabled', IS_CHECKED: 'is-checked', IS_UPGRADED: 'is-upgraded', JS_RADIO: 'mdl-js-radio', RADIO_BTN: 'mdl-radio__button', RADIO_OUTER_CIRCLE: 'mdl-radio__outer-circle', RADIO_INNER_CIRCLE: 'mdl-radio__inner-circle', RIPPLE_EFFECT: 'mdl-js-ripple-effect', RIPPLE_IGNORE_EVENTS: 'mdl-js-ripple-effect--ignore-events', RIPPLE_CONTAINER: 'mdl-radio__ripple-container', RIPPLE_CENTER: 'mdl-ripple--center', RIPPLE: 'mdl-ripple' }; /** * Handle change of state. * * @param {Event} event The event that fired. * @private */ MaterialRadio.prototype.onChange_ = function(event) { // Since other radio buttons don't get change events, we need to look for // them to update their classes. var radios = document.getElementsByClassName(this.CssClasses_.JS_RADIO); for (var i = 0; i < radios.length; i++) { var button = radios[i].querySelector('.' + this.CssClasses_.RADIO_BTN); // Different name == different group, so no point updating those. if (button.getAttribute('name') === this.btnElement_.getAttribute('name')) { radios[i]['MaterialRadio'].updateClasses_(); } } }; /** * Handle focus. * * @param {Event} event The event that fired. * @private */ MaterialRadio.prototype.onFocus_ = function(event) { this.element_.classList.add(this.CssClasses_.IS_FOCUSED); }; /** * Handle lost focus. * * @param {Event} event The event that fired. * @private */ MaterialRadio.prototype.onBlur_ = function(event) { this.element_.classList.remove(this.CssClasses_.IS_FOCUSED); }; /** * Handle mouseup. * * @param {Event} event The event that fired. * @private */ MaterialRadio.prototype.onMouseup_ = function(event) { this.blur_(); }; /** * Update classes. * * @private */ MaterialRadio.prototype.updateClasses_ = function() { this.checkDisabled(); this.checkToggleState(); }; /** * Add blur. * * @private */ MaterialRadio.prototype.blur_ = function() { // TODO: figure out why there's a focus event being fired after our blur, // so that we can avoid this hack. window.setTimeout(function() { this.btnElement_.blur(); }.bind(this), /** @type {number} */ (this.Constant_.TINY_TIMEOUT)); }; // Public methods. /** * Check the components disabled state. * * @public */ MaterialRadio.prototype.checkDisabled = function() { if (this.btnElement_.disabled) { this.element_.classList.add(this.CssClasses_.IS_DISABLED); } else { this.element_.classList.remove(this.CssClasses_.IS_DISABLED); } }; MaterialRadio.prototype['checkDisabled'] = MaterialRadio.prototype.checkDisabled; /** * Check the components toggled state. * * @public */ MaterialRadio.prototype.checkToggleState = function() { if (this.btnElement_.checked) { this.element_.classList.add(this.CssClasses_.IS_CHECKED); } else { this.element_.classList.remove(this.CssClasses_.IS_CHECKED); } }; MaterialRadio.prototype['checkToggleState'] = MaterialRadio.prototype.checkToggleState; /** * Disable radio. * * @public */ MaterialRadio.prototype.disable = function() { this.btnElement_.disabled = true; this.updateClasses_(); }; MaterialRadio.prototype['disable'] = MaterialRadio.prototype.disable; /** * Enable radio. * * @public */ MaterialRadio.prototype.enable = function() { this.btnElement_.disabled = false; this.updateClasses_(); }; MaterialRadio.prototype['enable'] = MaterialRadio.prototype.enable; /** * Check radio. * * @public */ MaterialRadio.prototype.check = function() { this.btnElement_.checked = true; this.updateClasses_(); }; MaterialRadio.prototype['check'] = MaterialRadio.prototype.check; /** * Uncheck radio. * * @public */ MaterialRadio.prototype.uncheck = function() { this.btnElement_.checked = false; this.updateClasses_(); }; MaterialRadio.prototype['uncheck'] = MaterialRadio.prototype.uncheck; /** * Initialize element. */ MaterialRadio.prototype.init = function() { if (this.element_) { this.btnElement_ = this.element_.querySelector('.' + this.CssClasses_.RADIO_BTN); this.boundChangeHandler_ = this.onChange_.bind(this); this.boundFocusHandler_ = this.onChange_.bind(this); this.boundBlurHandler_ = this.onBlur_.bind(this); this.boundMouseUpHandler_ = this.onMouseup_.bind(this); var outerCircle = document.createElement('span'); outerCircle.classList.add(this.CssClasses_.RADIO_OUTER_CIRCLE); var innerCircle = document.createElement('span'); innerCircle.classList.add(this.CssClasses_.RADIO_INNER_CIRCLE); this.element_.appendChild(outerCircle); this.element_.appendChild(innerCircle); var rippleContainer; if (this.element_.classList.contains( this.CssClasses_.RIPPLE_EFFECT)) { this.element_.classList.add( this.CssClasses_.RIPPLE_IGNORE_EVENTS); rippleContainer = document.createElement('span'); rippleContainer.classList.add( this.CssClasses_.RIPPLE_CONTAINER); rippleContainer.classList.add(this.CssClasses_.RIPPLE_EFFECT); rippleContainer.classList.add(this.CssClasses_.RIPPLE_CENTER); rippleContainer.addEventListener('mouseup', this.boundMouseUpHandler_); var ripple = document.createElement('span'); ripple.classList.add(this.CssClasses_.RIPPLE); rippleContainer.appendChild(ripple); this.element_.appendChild(rippleContainer); } this.btnElement_.addEventListener('change', this.boundChangeHandler_); this.btnElement_.addEventListener('focus', this.boundFocusHandler_); this.btnElement_.addEventListener('blur', this.boundBlurHandler_); this.element_.addEventListener('mouseup', this.boundMouseUpHandler_); this.updateClasses_(); this.element_.classList.add(this.CssClasses_.IS_UPGRADED); } }; /** * Downgrade the element. * * @private */ MaterialRadio.prototype.mdlDowngrade_ = function() { var rippleContainer = this.element_.querySelector('.' + this.CssClasses_.RIPPLE_CONTAINER); this.btnElement_.removeEventListener('change', this.boundChangeHandler_); this.btnElement_.removeEventListener('focus', this.boundFocusHandler_); this.btnElement_.removeEventListener('blur', this.boundBlurHandler_); this.element_.removeEventListener('mouseup', this.boundMouseUpHandler_); if (rippleContainer) { rippleContainer.removeEventListener('mouseup', this.boundMouseUpHandler_); this.element_.removeChild(rippleContainer); } }; /** * Public alias for the downgrade method. * * @public */ MaterialRadio.prototype.mdlDowngrade = MaterialRadio.prototype.mdlDowngrade_; MaterialRadio.prototype['mdlDowngrade'] = MaterialRadio.prototype.mdlDowngrade; // The component registers itself. It can assume componentHandler is available // in the global scope. componentHandler.register({ constructor: MaterialRadio, classAsString: 'MaterialRadio', cssClass: 'mdl-js-radio', widget: true }); })();