flex分页控件的使用.docx

分页显示数据是网站浏览中必备的元素之一，在FLEX中通过数据分页的方法来获取当前显示数据，即能降低网络传的负担同时也能减少Flex的处理工作。分页控件需要的功能有：首页，上一页，下一页，未页和页数跳转等。定义分页控件的事件：PageChange相关事件参数对象：package import flash.events.Event; import mx.events.IndexChangedEvent; public class PageChangeEvent extends flash.events.Event public function PageChangeEvent(pageindex:int,pagesize:int) super(PageChange); PageIndex= pageindex; PageSize =pagesize; public var PageIndex:int=0; public var PageSize:int=0; public function Filter(list:Array):Array var newlist:Array = new Array(); var start:int = PageSize*PageIndex; var end:int = start+PageSize; for(var i:int = start;iend;i+) if(i list.length) newlist.push(listi); else break; return newlist; 分页控件的代码： Event(name=PageChange, type=PageChangeEvent,bubbles=true,cancelable=true) Embed(LE.gif) Embed(L.gif) Embed(R.gif) Embed(RE.gif) 0) SetState(); private function SetState():void if(mRecordCount%mPageSize 0) mPageCount = mRecordCount/mPageSize+1; else mPageCount = mRecordCount/mPageSize; var pages:Array = new Array(); for(var i:int =1;i1) c_select.enabled=true; c_l.enabled=true; c_le.enabled=true; c_r.enabled=true; c_re.enabled=true; if(mPageIndex=0) c_l.enabled=false; c_le.enabled=false; if(mPageIndex = mPageCount-1) c_r.enabled=false; c_re.enabled=false; else c_select.enabled=false; c_l.enabled=false; c_le.enabled=false; c_r.enabled=false; c_re.enabled=false; pageinfo.text=Records: + mRecordCount+/ + mPageCount+pages; /获取记录总数 public function get RecordCount():int return mRecordCount; /打开分页控件 public function Open():void mPageIndex =0; OnPageChange(); /刷新当前页面 public function Refresh():void OnPageChange(); private function OnPageChange():void var e:PageChangeEvent = new PageChangeEvent(mPageIndex, mPageSize); dispatchEvent(e); 用例页面代码： !CDATA import mx.controls.Alert; import flash.events.Event; im