Flex4自定义分页组件

 

最近因为项目需求，需要写个分页组件，我这人比较懒 一般写出来之后 就记下来供以后粘贴复制了 哈哈，希望大家学习的时候不要这样搞啊

下面贴出代码

PagingBar.mxml

<?xml version="1.0" encoding="utf-8"?><mx:HBox xmlns:fx="http://ns.adobe.com/mxml/2009"  xmlns:s="library://ns.adobe.com/flex/spark"  xmlns:mx="library://ns.adobe.com/flex/mx" ><fx:Script><![CDATA[import mx.collections.ArrayCollection;import mx.events.ItemClickEvent;import flash.events.KeyboardEvent;import mx.controls.DataGrid;import mx.validators.NumberValidator;import mx.rpc.events.ResultEvent; import mx.rpc.events.FaultEvent;import mx.controls.Alert;[Bindable][Embed(source='com/iman/sps/sheet/image/first.jpg')]public var firstIcon:Class;  public var firstPage:uint; [Bindable][Embed(source='com/iman/sps/sheet/image/pre.jpg')]public var preIcon:Class;public var prePage:uint; [Bindable][Embed(source='com/iman/sps/sheet/image/next.jpg')]public var nextIcon:Class;public var nextPage:uint; [Bindable][Embed(source='com/iman/sps/sheet/image/last.jpg')]public var lastIcon:Class;public var lastPage:uint;[Bindable]public var pageSize:int=15;//单页行数[Bindable]public var totalPage:int=1;//总页数[Bindable]public var currentPage:int=1;//当前页[Bindable]public var totalClum:int=0;//总记录数//分页函数public var localFunction:Function=null;//重新为当前页的变量赋值public function loadData(pageNum:int):void{this.pageSize = setPageSize.selectedItem.data as Number; this.totalPage =Math.ceil(this.totalClum/this.pageSize);if(pageNum>0 && pageNum<=this.totalPage){this.currentPage=pageNum;if(this.localFunction!=null){localFunction(pageNum);}else{Alert.show("请设置回调方法！");}}}//重新设置每页显示记录数public function changePagesize():void{//当前页首条记录的序号var currentPageRows:int=((this.currentPage-1)*this.pageSize);//Alert.show(String(currentPageRows));//重新设置以后，单页显示记录数this.pageSize = setPageSize.selectedItem.data as Number; //重新设置以后，总页数this.totalPage =Math.ceil(this.totalClum/this.pageSize);//重新调整当前页码//Alert.show(String(newPageNum));if(this.localFunction!=null){localFunction(this.currentPage);}else{Alert.show("请设置回调方法！");}}]]></fx:Script><mx:Text id="temp" text="" visible="false" includeInLayout="false"/><mx:HBox verticalGap="0"  horizontalGap="0" horizontalAlign="center"verticalAlign="middle"> <mx:Text text="{'   共'+(totalClum)+'条记录'}" fontSize="12"/>                <mx:Label   text="每页显示："/><mx:ComboBox id="setPageSize" width="52" height="16" change="changePagesize()"><mx:dataProvider><fx:Array>     <fx:Object label="15" data="15" />                                                                                                         <fx:Object label="20" data="20" /><fx:Object label="30" data="30" /> <fx:Object label="40" data="40" />                                                                                                         <fx:Object label="50" data="50" /><fx:Object label="60" data="60" /> <fx:Object label="70" data="70" />                                                                                                         <fx:Object label="80" data="80" />   </fx:Array></mx:dataProvider></mx:ComboBox><mx:Label text="条"/><mx:Button id="firstNavBtn" icon="{firstIcon}" width="10" height="10" click="loadData(1)" enabled="{lbtnPrevious.enabled}"/><mx:LinkButton id="lbtnFirst" label="首页" click="loadData(1)" enabled="{lbtnPrevious.enabled}" fontSize="12"/><mx:Button id="preNavBtn" icon="{preIcon}" width="7" height="10" click="loadData(currentPage-1)" enabled="{currentPage!=1?true:false}"/><mx:LinkButton id="lbtnPrevious" label="上一页" click="loadData(currentPage-1)" enabled="{currentPage!=1?true:false}" fontSize="12"/><mx:Text text="{'【 '+(Math.ceil(this.totalClum/this.pageSize)>0?(currentPage):1)+'/'+(Math.ceil(this.totalClum/this.pageSize)>0?Math.ceil(this.totalClum/this.pageSize):1)+'页】  '}" fontSize="12"/><mx:Button id="nextNavBtn" icon="{nextIcon}" width="7" height="10" click="loadData(currentPage+1)" enabled="{Math.ceil(this.totalClum/this.pageSize)>(currentPage)?true:false}"/><mx:LinkButton id="lbtnNext" label="下一页" click="loadData(currentPage+1)" enabled="{Math.ceil(this.totalClum/this.pageSize)>(currentPage)?true:false}" fontSize="12"/><mx:Button id="lastNavBtn" icon="{lastIcon}" width="10" height="10" click="loadData(Math.ceil(this.totalClum/this.pageSize))" enabled="{lbtnNext.enabled}"/><mx:LinkButton id="lbtnLast" label="尾页" click="loadData(Math.ceil(this.totalClum/this.pageSize))" enabled="{lbtnNext.enabled}" fontSize="12"/><mx:Label text="跳转到"/><mx:NumericStepper id="nsPageNum" width="50" height="22" stepSize="1" minimum="1" maximum="{Math.ceil(this.totalClum/this.pageSize)}" enabled="{lbtnJump.enabled}" cornerRadius="0" fontSize="12"/><mx:Label text="页"/><mx:LinkButton id="lbtnJump" label="GO"  click="loadData(nsPageNum.value)" enabled="{Math.ceil(this.totalClum/this.pageSize)>1?true:false}" fontSize="12"/>              </mx:HBox></mx:HBox>

在其他组件中引用 其中common 是我自定义的标签 里面引入了这个分页组件的所在位置 例如： xmlns:common="com.iman.common.*"

 

<common:PagingBar width="100%" height="5%" id="pageBar"></common:PagingBar>

 

写完之后说说怎么用。里面每次改变分页某个属性 就会触发一个叫做localFunction的函数 这个函数是对外暴漏给引用页面来实现他的功能的

下面是一个示例代码：作用是 首先设置初始页 然后获得 每页显示的数据记录条数 然后 实现分页组件暴露出来的分页功能函数

protected function test_clickHandler(event:MouseEvent):void{firstStart=0;pagesize=pageBar.pageSize;pageBar.localFunction=fun;                           }

下面我们来实现这个函数 也就是fun 这个fun获得当前页数  因为后台调用了Oracle实现的分页查询 所以我要算出数据从第几条开始 到第几条结束 然后就是调用查询方法了

public function fun(pageNo:int):void{this.firstStart=(pageNo - 1) * pageBar.pageSize;pagesize=pageBar.pageSize;commonQuery.commonQuery(firstStart, pagesize, commonQueryData,accountInfo);}

 

条理有点乱不懂可以留言 询问