269 lines
7.8 KiB
JavaScript
269 lines
7.8 KiB
JavaScript
/**
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* @license
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* Copyright 2015 Google Inc. All Rights Reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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(function() {
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'use strict';
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/**
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* Class constructor for Checkbox MDL component.
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* Implements MDL component design pattern defined at:
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* https://github.com/jasonmayes/mdl-component-design-pattern
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*
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* @constructor
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* @param {HTMLElement} element The element that will be upgraded.
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*/
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var MaterialCheckbox = function MaterialCheckbox(element) {
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this.element_ = element;
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// Initialize instance.
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this.init();
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};
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window['MaterialCheckbox'] = MaterialCheckbox;
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/**
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* Store constants in one place so they can be updated easily.
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*
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* @enum {string | number}
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* @private
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*/
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MaterialCheckbox.prototype.Constant_ = {
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TINY_TIMEOUT: 0.001
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};
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/**
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* Store strings for class names defined by this component that are used in
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* JavaScript. This allows us to simply change it in one place should we
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* decide to modify at a later date.
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*
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* @enum {string}
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* @private
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*/
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MaterialCheckbox.prototype.CssClasses_ = {
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INPUT: 'mdl-checkbox__input',
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BOX_OUTLINE: 'mdl-checkbox__box-outline',
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FOCUS_HELPER: 'mdl-checkbox__focus-helper',
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TICK_OUTLINE: 'mdl-checkbox__tick-outline',
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RIPPLE_EFFECT: 'mdl-js-ripple-effect',
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RIPPLE_IGNORE_EVENTS: 'mdl-js-ripple-effect--ignore-events',
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RIPPLE_CONTAINER: 'mdl-checkbox__ripple-container',
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RIPPLE_CENTER: 'mdl-ripple--center',
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RIPPLE: 'mdl-ripple',
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IS_FOCUSED: 'is-focused',
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IS_DISABLED: 'is-disabled',
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IS_CHECKED: 'is-checked',
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IS_UPGRADED: 'is-upgraded'
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};
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/**
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* Handle change of state.
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*
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* @param {Event} event The event that fired.
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* @private
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*/
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MaterialCheckbox.prototype.onChange_ = function(event) {
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this.updateClasses_();
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};
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/**
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* Handle focus of element.
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*
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* @param {Event} event The event that fired.
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* @private
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*/
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MaterialCheckbox.prototype.onFocus_ = function(event) {
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this.element_.classList.add(this.CssClasses_.IS_FOCUSED);
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};
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/**
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* Handle lost focus of element.
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*
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* @param {Event} event The event that fired.
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* @private
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*/
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MaterialCheckbox.prototype.onBlur_ = function(event) {
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this.element_.classList.remove(this.CssClasses_.IS_FOCUSED);
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};
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/**
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* Handle mouseup.
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*
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* @param {Event} event The event that fired.
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* @private
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*/
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MaterialCheckbox.prototype.onMouseUp_ = function(event) {
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this.blur_();
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};
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/**
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* Handle class updates.
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*
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* @private
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*/
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MaterialCheckbox.prototype.updateClasses_ = function() {
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this.checkDisabled();
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this.checkToggleState();
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};
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/**
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* Add blur.
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*
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* @private
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*/
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MaterialCheckbox.prototype.blur_ = function() {
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// TODO: figure out why there's a focus event being fired after our blur,
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// so that we can avoid this hack.
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window.setTimeout(function() {
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this.inputElement_.blur();
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}.bind(this), /** @type {number} */ (this.Constant_.TINY_TIMEOUT));
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};
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// Public methods.
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/**
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* Check the inputs toggle state and update display.
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*
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* @public
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*/
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MaterialCheckbox.prototype.checkToggleState = function() {
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if (this.inputElement_.checked) {
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this.element_.classList.add(this.CssClasses_.IS_CHECKED);
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} else {
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this.element_.classList.remove(this.CssClasses_.IS_CHECKED);
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}
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};
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MaterialCheckbox.prototype['checkToggleState'] =
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MaterialCheckbox.prototype.checkToggleState;
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/**
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* Check the inputs disabled state and update display.
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*
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* @public
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*/
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MaterialCheckbox.prototype.checkDisabled = function() {
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if (this.inputElement_.disabled) {
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this.element_.classList.add(this.CssClasses_.IS_DISABLED);
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} else {
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this.element_.classList.remove(this.CssClasses_.IS_DISABLED);
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}
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};
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MaterialCheckbox.prototype['checkDisabled'] =
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MaterialCheckbox.prototype.checkDisabled;
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/**
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* Disable checkbox.
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*
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* @public
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*/
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MaterialCheckbox.prototype.disable = function() {
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this.inputElement_.disabled = true;
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this.updateClasses_();
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};
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MaterialCheckbox.prototype['disable'] = MaterialCheckbox.prototype.disable;
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/**
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* Enable checkbox.
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*
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* @public
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*/
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MaterialCheckbox.prototype.enable = function() {
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this.inputElement_.disabled = false;
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this.updateClasses_();
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};
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MaterialCheckbox.prototype['enable'] = MaterialCheckbox.prototype.enable;
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/**
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* Check checkbox.
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*
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* @public
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*/
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MaterialCheckbox.prototype.check = function() {
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this.inputElement_.checked = true;
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this.updateClasses_();
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};
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MaterialCheckbox.prototype['check'] = MaterialCheckbox.prototype.check;
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/**
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* Uncheck checkbox.
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*
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* @public
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*/
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MaterialCheckbox.prototype.uncheck = function() {
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this.inputElement_.checked = false;
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this.updateClasses_();
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};
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MaterialCheckbox.prototype['uncheck'] = MaterialCheckbox.prototype.uncheck;
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/**
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* Initialize element.
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*/
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MaterialCheckbox.prototype.init = function() {
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if (this.element_) {
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this.inputElement_ = this.element_.querySelector('.' +
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this.CssClasses_.INPUT);
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var boxOutline = document.createElement('span');
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boxOutline.classList.add(this.CssClasses_.BOX_OUTLINE);
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var tickContainer = document.createElement('span');
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tickContainer.classList.add(this.CssClasses_.FOCUS_HELPER);
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var tickOutline = document.createElement('span');
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tickOutline.classList.add(this.CssClasses_.TICK_OUTLINE);
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boxOutline.appendChild(tickOutline);
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this.element_.appendChild(tickContainer);
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this.element_.appendChild(boxOutline);
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if (this.element_.classList.contains(this.CssClasses_.RIPPLE_EFFECT)) {
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this.element_.classList.add(this.CssClasses_.RIPPLE_IGNORE_EVENTS);
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this.rippleContainerElement_ = document.createElement('span');
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this.rippleContainerElement_.classList.add(this.CssClasses_.RIPPLE_CONTAINER);
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this.rippleContainerElement_.classList.add(this.CssClasses_.RIPPLE_EFFECT);
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this.rippleContainerElement_.classList.add(this.CssClasses_.RIPPLE_CENTER);
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this.boundRippleMouseUp = this.onMouseUp_.bind(this);
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this.rippleContainerElement_.addEventListener('mouseup', this.boundRippleMouseUp);
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var ripple = document.createElement('span');
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ripple.classList.add(this.CssClasses_.RIPPLE);
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this.rippleContainerElement_.appendChild(ripple);
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this.element_.appendChild(this.rippleContainerElement_);
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}
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this.boundInputOnChange = this.onChange_.bind(this);
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this.boundInputOnFocus = this.onFocus_.bind(this);
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this.boundInputOnBlur = this.onBlur_.bind(this);
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this.boundElementMouseUp = this.onMouseUp_.bind(this);
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this.inputElement_.addEventListener('change', this.boundInputOnChange);
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this.inputElement_.addEventListener('focus', this.boundInputOnFocus);
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this.inputElement_.addEventListener('blur', this.boundInputOnBlur);
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this.element_.addEventListener('mouseup', this.boundElementMouseUp);
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this.updateClasses_();
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this.element_.classList.add(this.CssClasses_.IS_UPGRADED);
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}
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};
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// The component registers itself. It can assume componentHandler is available
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// in the global scope.
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componentHandler.register({
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constructor: MaterialCheckbox,
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classAsString: 'MaterialCheckbox',
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cssClass: 'mdl-js-checkbox',
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widget: true
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});
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})();
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