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- <title>The source code</title>
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- <pre class="prettyprint lang-js">/*!
- * Ext JS Library 3.2.0
- * Copyright(c) 2006-2010 Ext JS, Inc.
- * licensing@extjs.com
- * http://www.extjs.com/license
- */
-Ext.ns('Ext.ux');
-
-Ext.ux.Rating = Ext.extend(Ext.util.Observable, {
- // Configuration options
- starWidth: 16,
- split: 1,
- resetValue: '',
- defaultSelected: -1,
- selected: -1,
- showTitles: true,
-
- // Our class constructor
- constructor : function(element, config) {
- Ext.apply(this, config);
- Ext.ux.Rating.superclass.constructor.call(this);
-
- this.addEvents(
- 'change',
- 'reset'
- );
-
- this.el = Ext.get(element);
- this.init();
- },
-
- init : function() {
- var me = this;
-
- // Some arrays we are going to store data in
- this.values = [];
- this.titles = [];
- this.stars = [];
-
- // We create a container to put all our stars into
- this.container = this.el.createChild({
- cls: 'ux-rating-container ux-rating-clearfix'
- });
-
- if(this.canReset) {
- this.resetEl = this.container.createChild({
- cls: 'ux-rating-reset',
- cn: [{
- tag: 'a',
- title: this.showTitles ? (this.resetTitle || 'Reset your vote') : '',
- html: 'Reset'
- }]
- });
- this.resetEl.visibilityMode = Ext.Element.DISPLAY;
-
- this.resetEl.hover(function() {
- Ext.fly(this).addClass('ux-rating-reset-hover');
- }, function() {
- Ext.fly(this).removeClass('ux-rating-reset-hover');
- });
-
- this.resetEl.on('click', this.reset, this);
- }
-
- // We use DomQuery to select the radio buttons
- this.radioBoxes = this.el.select('input[type=radio]');
- // Then we can loop over the CompositeElement using each
- this.radioBoxes.each(this.initStar, this);
-
- // We use DomHelper to create our hidden input
- this.input = this.container.createChild({
- tag: 'input',
- type: 'hidden',
- name: this.name,
- value: this.values[this.defaultSelected] || this.resetValue
- });
-
- // Lets remove all the radio buttons from the DOM
- this.radioBoxes.remove();
-
- this.select(this.defaultSelected === undefined ? false : this.defaultSelected)
-
- if(this.disabled) {
- this.disable();
- } else {
- // Enable will set up our event listeners
- this.enable();
- }
- },
-
- initStar : function(item, all, i) {
- var sw = Math.floor(this.starWidth / this.split);
-
- // We use the name and disabled attributes of the first radio button
- if(i == 0) {
- this.name = item.dom.name;
- this.disabled = item.dom.disabled;
- }
-
- // Saving the value and title for this star
- this.values[i] = item.dom.value;
- this.titles[i] = item.dom.title;
-
- if(item.dom.checked) {
- this.defaultSelected = i;
- }
-
- // Now actually create the star!
- var star = this.container.createChild({
- cls: 'ux-rating-star'
- });
-
- var starLink = star.createChild({
- tag: 'a',
- html: this.values[i],
- title: this.showTitles ? this.titles[i] : ''
- });
-
- // Prepare division settings
- if(this.split) {
- var odd = (i % this.split);
- star.setWidth(sw);
- starLink.setStyle('margin-left', '-' + (odd * sw) + 'px');
- }
-
- // Save the reference to this star so we can easily access it later
- this.stars.push(star.dom);
- },
-
- onStarClick : function(ev, t) {
- if(!this.disabled) {
- this.select(this.stars.indexOf(t));
- }
- },
-
- onStarOver : function(ev, t) {
- if(!this.disabled) {
- this.fillTo(this.stars.indexOf(t), true);
- }
- },
-
- onStarOut : function(ev, t) {
- if(!this.disabled) {
- this.fillTo(this.selected, false);
- }
- },
-
- reset : function(ev, t) {
- this.select(-1);
- },
-
- select : function(index) {
- if(index === false || index === -1) {
- // remove current selection in el
- this.value = this.resetValue;
- this.title = "";
- this.input.dom.value = '';
-
- if(this.canReset) {
- this.resetEl.setOpacity(0.5);
- }
-
- this.fillNone();
-
- if(this.selected !== -1) {
- this.fireEvent('change', this, this.values[index], this.stars[index]);
- }
- this.selected = -1;
- }
- else if(index !== this.selected) {
- // Update some properties
- this.selected = index;
- this.value = this.values[index];
- this.title = this.titles[index];
-
- // Set the value of our hidden input so the rating can be submitted
- this.input.dom.value = this.value;
-
- if(this.canReset) {
- this.resetEl.setOpacity(0.99);
- }
-
- // the fillTo() method will fill the stars up until the selected one
- this.fillTo(index, false);
-
- // Lets also not forget to fire our custom event!
- this.fireEvent('change', this, this.values[index], this.stars[index]);
- }
- },
-
- fillTo : function(index, hover) {
- if (index != -1) {
- var addClass = hover ? 'ux-rating-star-hover' : 'ux-rating-star-on';
- var removeClass = hover ? 'ux-rating-star-on' : 'ux-rating-star-hover';
-
- // We add a css class to each star up until the selected one
- Ext.each(this.stars.slice(0, index+1), function() {
- Ext.fly(this).removeClass(removeClass).addClass(addClass);
- });
-
- // And then remove the same class from all the stars after this one
- Ext.each(this.stars.slice(index+1), function() {
- Ext.fly(this).removeClass([removeClass, addClass]);
- });
- }
- else {
- this.fillNone();
- }
- },
-
- fillNone : function() {
- this.container.select('.ux-rating-star').removeClass(['ux-rating-star-hover', 'ux-rating-star-on']);
- },
-
- enable : function() {
- if(this.canReset) {
- this.resetEl.show();
- }
-
- this.input.dom.disabled = null;
- this.disabled = false;
-
- this.container.removeClass('ux-rating-disabled');
-
- // We will be using the technique of event delegation by listening
- // for bubbled up events on the container
- this.container.on({
- click: this.onStarClick,
- mouseover: this.onStarOver,
- mouseout: this.onStarOut,
- scope: this,
- delegate: 'div.ux-rating-star'
- });
- },
-
- disable : function() {
- if(this.canReset) {
- this.resetEl.hide();
- }
-
- this.input.dom.disabled = true;
- this.disabled = true;
-
- this.container.addClass('ux-rating-disabled');
-
- this.container.un({
- click: this.onStarClick,
- mouseover: this.onStarOver,
- mouseout: this.onStarOut,
- scope: this,
- delegate: 'div.ux-rating-star'
- });
- },
-
- getValue : function() {
- return this.values[this.selected] || this.resetValue;
- },
-
- destroy : function() {
- this.disable();
- this.container.remove();
- this.radioBoxes.appendTo(this.el);
- if(this.selected !== -1) {
- this.radioBoxes.elements[this.selected].checked = true;
- }
- }
-});
-</pre>
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