Element.scroll.js
资源名称:ext-3.1.0.zip [点击查看]
上传用户:dawnssy
上传日期:2022-08-06
资源大小:9345k
文件大小:2k
源码类别:
JavaScript
开发平台:
JavaScript
- /*! * Ext JS Library 3.1.0 * Copyright(c) 2006-2009 Ext JS, LLC * licensing@extjs.com * http://www.extjs.com/license */ /**
- * @class Ext.Element
- */
- Ext.Element.addMethods({
- /**
- * Returns true if this element is scrollable.
- * @return {Boolean}
- */
- isScrollable : function(){
- var dom = this.dom;
- return dom.scrollHeight > dom.clientHeight || dom.scrollWidth > dom.clientWidth;
- },
- /**
- * Scrolls this element the specified scroll point. It does NOT do bounds checking so if you scroll to a weird value it will try to do it. For auto bounds checking, use scroll().
- * @param {String} side Either "left" for scrollLeft values or "top" for scrollTop values.
- * @param {Number} value The new scroll value.
- * @return {Element} this
- */
- scrollTo : function(side, value){
- this.dom["scroll" + (/top/i.test(side) ? "Top" : "Left")] = value;
- return this;
- },
- /**
- * Returns the current scroll position of the element.
- * @return {Object} An object containing the scroll position in the format {left: (scrollLeft), top: (scrollTop)}
- */
- getScroll : function(){
- var d = this.dom,
- doc = document,
- body = doc.body,
- docElement = doc.documentElement,
- l,
- t,
- ret;
- if(d == doc || d == body){
- if(Ext.isIE && Ext.isStrict){
- l = docElement.scrollLeft;
- t = docElement.scrollTop;
- }else{
- l = window.pageXOffset;
- t = window.pageYOffset;
- }
- ret = {left: l || (body ? body.scrollLeft : 0), top: t || (body ? body.scrollTop : 0)};
- }else{
- ret = {left: d.scrollLeft, top: d.scrollTop};
- }
- return ret;
- }
- });