129 lines
2.6 KiB
JavaScript
129 lines
2.6 KiB
JavaScript
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/**
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* Accept one checkbox input field, and convert it into iOS style switch UI.
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*/
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function Switch(input) {
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if ('checkbox' !== input.type) throw new Error('You can\'t make Switch out of non-checkbox input');
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this.input = input;
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this.input.style.display = 'none'; // hide the actual input
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this.el = document.createElement('div');
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this.el.className = 'ios-switch';
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this._prepareDOM();
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this.input.parentElement.insertBefore(this.el, this.input);
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// read initial state and set Switch state accordingly
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if (this.input.checked) this.turnOn()
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}
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/**
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* Cross Browser add class method
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*/
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Switch.addClass = function( el, className) {
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if (el.classList) {
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el.classList.add(className);
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} else {
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el.className += ' ' + className;
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}
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};
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/**
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* Cross Browser remove class method
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*/
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Switch.removeClass = function( el, className) {
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if (el.classList) {
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el.classList.remove(className);
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} else {
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el.className = el.className.replace(new RegExp('(^|\\b)' + className.split(' ').join('|') + '(\\b|$)', 'gi'), ' ');
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}
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};
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/**
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* Cross Browser has class method
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*/
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Switch.hasClass = function(el, className) {
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if (el.classList) {
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return el.classList.contains(className);
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} else {
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return new RegExp('(^| )' + className + '( |$)', 'gi').test(el.className);
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}
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};
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/**
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* Toggles on/off state
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*/
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Switch.prototype.toggle = function() {
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if( Switch.hasClass(this.el, 'on') ){
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this.turnOff();
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} else {
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this.turnOn();
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}
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this.triggerChange();
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};
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/**
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* Turn on
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*/
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Switch.prototype.turnOn = function() {
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Switch.addClass(this.el, 'on');
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Switch.removeClass(this.el, 'off');
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this.input.checked = true;
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};
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/**
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* Turn off
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*/
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Switch.prototype.turnOff = function() {
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Switch.removeClass(this.el, 'on');
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Switch.addClass(this.el, 'off');
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this.input.checked = false;
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}
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/**
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* Triggers DOM event programatically on the real input field
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*/
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Switch.prototype.triggerChange = function() {
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if ("fireEvent" in this.input){
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this.input.fireEvent("onchange");
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} else {
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var evt = document.createEvent("HTMLEvents");
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evt.initEvent("change", false, true);
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this.input.dispatchEvent(evt);
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}
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};
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/**
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* We need to prepare some DOM elements
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*/
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Switch.prototype._prepareDOM = function() {
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var onBackground = document.createElement('div');
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onBackground.className = 'on-background background-fill';
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var stateBackground = document.createElement('div');
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stateBackground.className = 'state-background background-fill';
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var handle = document.createElement('div');
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handle.className = 'handle';
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this.el.appendChild(onBackground);
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this.el.appendChild(stateBackground);
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this.el.appendChild(handle);
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};
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