CompositeElementLite.js
资源名称:ext-3.0.0.zip [点击查看]
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上传日期:2018-01-28
资源大小:10124k
文件大小:7k
源码类别:
中间件编程
开发平台:
JavaScript
- /*! * Ext JS Library 3.0.0 * Copyright(c) 2006-2009 Ext JS, LLC * licensing@extjs.com * http://www.extjs.com/license */ /**
- * @class Ext.CompositeElementLite
- * Flyweight composite class. Reuses the same Ext.Element for element operations.
- <pre><code>
- var els = Ext.select("#some-el div.some-class");
- // or select directly from an existing element
- var el = Ext.get('some-el');
- el.select('div.some-class');
- els.setWidth(100); // all elements become 100 width
- els.hide(true); // all elements fade out and hide
- // or
- els.setWidth(100).hide(true);
- </code></pre><br><br>
- * <b>NOTE: Although they are not listed, this class supports all of the set/update methods of Ext.Element. All Ext.Element
- * actions will be performed on all the elements in this collection.</b>
- */
- Ext.CompositeElementLite = function(els, root){
- this.elements = [];
- this.add(els, root);
- this.el = new Ext.Element.Flyweight();
- };
- Ext.CompositeElementLite.prototype = {
- isComposite: true,
- /**
- * Returns the number of elements in this composite
- * @return Number
- */
- getCount : function(){
- return this.elements.length;
- },
- add : function(els){
- if(els){
- if (Ext.isArray(els)) {
- this.elements = this.elements.concat(els);
- } else {
- var yels = this.elements;
- Ext.each(els, function(e) {
- yels.push(e);
- });
- }
- }
- return this;
- },
- invoke : function(fn, args){
- var els = this.elements,
- el = this.el;
- Ext.each(els, function(e) {
- el.dom = e;
- Ext.Element.prototype[fn].apply(el, args);
- });
- return this;
- },
- /**
- * Returns a flyweight Element of the dom element object at the specified index
- * @param {Number} index
- * @return {Ext.Element}
- */
- item : function(index){
- var me = this;
- if(!me.elements[index]){
- return null;
- }
- me.el.dom = me.elements[index];
- return me.el;
- },
- // fixes scope with flyweight
- addListener : function(eventName, handler, scope, opt){
- Ext.each(this.elements, function(e) {
- Ext.EventManager.on(e, eventName, handler, scope || e, opt);
- });
- return this;
- },
- /**
- * Calls the passed function passing (el, this, index) for each element in this composite. <b>The element
- * passed is the flyweight (shared) Ext.Element instance, so if you require a
- * a reference to the dom node, use el.dom.</b>
- * @param {Function} fn The function to call
- * @param {Object} scope (optional) The <i>this</i> object (defaults to the element)
- * @return {CompositeElement} this
- */
- each : function(fn, scope){
- var me = this,
- el = me.el;
- Ext.each(me.elements, function(e,i) {
- el.dom = e;
- return fn.call(scope || el, el, me, i);
- });
- return me;
- },
- /**
- * Find the index of the passed element within the composite collection.
- * @param el {Mixed} The id of an element, or an Ext.Element, or an HtmlElement to find within the composite collection.
- * @return Number The index of the passed Ext.Element in the composite collection, or -1 if not found.
- */
- indexOf : function(el){
- return this.elements.indexOf(Ext.getDom(el));
- },
- /**
- * Replaces the specified element with the passed element.
- * @param {Mixed} el The id of an element, the Element itself, the index of the element in this composite
- * to replace.
- * @param {Mixed} replacement The id of an element or the Element itself.
- * @param {Boolean} domReplace (Optional) True to remove and replace the element in the document too.
- * @return {CompositeElement} this
- */
- replaceElement : function(el, replacement, domReplace){
- var index = !isNaN(el) ? el : this.indexOf(el),
- d;
- if(index > -1){
- replacement = Ext.getDom(replacement);
- if(domReplace){
- d = this.elements[index];
- d.parentNode.insertBefore(replacement, d);
- Ext.removeNode(d);
- }
- this.elements.splice(index, 1, replacement);
- }
- return this;
- },
- /**
- * Removes all elements.
- */
- clear : function(){
- this.elements = [];
- }
- };
- Ext.CompositeElementLite.prototype.on = Ext.CompositeElementLite.prototype.addListener;
- (function(){
- var fnName,
- ElProto = Ext.Element.prototype,
- CelProto = Ext.CompositeElementLite.prototype;
- for(fnName in ElProto){
- if(Ext.isFunction(ElProto[fnName])){
- (function(fnName){
- CelProto[fnName] = CelProto[fnName] || function(){
- return this.invoke(fnName, arguments);
- };
- }).call(CelProto, fnName);
- }
- }
- })();
- if(Ext.DomQuery){
- Ext.Element.selectorFunction = Ext.DomQuery.select;
- }
- /**
- * Selects elements based on the passed CSS selector to enable {@link Ext.Element Element} methods
- * to be applied to many related elements in one statement through the returned {@link Ext.CompositeElement CompositeElement} or
- * {@link Ext.CompositeElementLite CompositeElementLite} object.
- * @param {String/Array} selector The CSS selector or an array of elements
- * @param {Boolean} unique (optional) true to create a unique Ext.Element for each element (defaults to a shared flyweight object) <b>Not supported in core</b>
- * @param {HTMLElement/String} root (optional) The root element of the query or id of the root
- * @return {CompositeElementLite/CompositeElement}
- * @member Ext.Element
- * @method select
- */
- Ext.Element.select = function(selector, unique, root){
- var els;
- if(typeof selector == "string"){
- els = Ext.Element.selectorFunction(selector, root);
- }else if(selector.length !== undefined){
- els = selector;
- }else{
- throw "Invalid selector";
- }
- return new Ext.CompositeElementLite(els);
- };
- /**
- * Selects elements based on the passed CSS selector to enable {@link Ext.Element Element} methods
- * to be applied to many related elements in one statement through the returned {@link Ext.CompositeElement CompositeElement} or
- * {@link Ext.CompositeElementLite CompositeElementLite} object.
- * @param {String/Array} selector The CSS selector or an array of elements
- * @param {Boolean} unique (optional) true to create a unique Ext.Element for each element (defaults to a shared flyweight object)
- * @param {HTMLElement/String} root (optional) The root element of the query or id of the root
- * @return {CompositeElementLite/CompositeElement}
- * @member Ext
- * @method select
- */
- Ext.select = Ext.Element.select;