使用方法
<PageSelector id="pageSelector"
numPagesToDisplay="5" <!--当前界面一次显示几页-->
pageSelected="kmfspx(kmfstaxis)" <!---->
borderStyle="none"
showZero="0" <!--是否显示0 及如果有100页 第一页显示为 001 -->
MaxRows="1212" <!--拥有的记录数-->
SimplePageRows="20" <!--多少条记录是一页-->
/>
查询时要用到的变量有
as 文件中 pageSelector.Startrow 当前选择页对应的数据库开始记录
pageSelector.Endrow 当前选择页对应的数据库结束记录
PageSelector.mxml 文件内容
<?xml version="1.0" encoding="utf-8"?>
<!--
-->
<mx:HBox xmlns:mx="http://www.macromedia.com/2003/mxml" visible="{totalPages > 0}" horizontalGap="-1" >
<mx:Script>
<![CDATA[
private var __currentPage : Number = 1;
private var __totalPages : Number = 0;
private var repeaterStartIndex : Number = 0;
private var pageStringLength : Number;
private var currentButton : mx.controls.Link;
public var __showZero:Number=0;
private var __MaxRows: Number =0;//得到的总行数
private var __SimplePageRows: Number;//单页要有的行数
//通过页数计算开始记录数
function get Startrow():Number
{
return (((currentPage-1)*SimplePageRows)+1);
}
//返回当前页的结束记录数
function get Endrow():Number
{
var re:Number=0;
if (currentPage != totalPages)
{
re = currentPage*SimplePageRows;
}
else if (currentPage == totalPages)
{
re =MaxRows;
}
return re;
}
[ChangeEvent("MaxRowsChanged")]
function get showZero() : Number
{
return __showZero;
}
function set showZero(tp : Number) : Void
{
__showZero=tp;
mathcountpage();
}
[ChangeEvent("MaxRowsChanged")]
function get MaxRows() : Number
{
return __MaxRows;
}
function set MaxRows(tp : Number) : Void
{
__MaxRows=tp;
mathcountpage();
}
[ChangeEvent("SimplePageRowsChanged")]
function get SimplePageRows() : Number
{
return __SimplePageRows;
}
function set SimplePageRows(tp : Number) : Void
{
__SimplePageRows=tp;
mathcountpage();
}
function mathcountpage()
{
var a:Number = __MaxRows ;
var b:Number = __SimplePageRows;
totalPages =(a -(a%b))/b +(((a%b)>0)?1:0);
}
[ChangeEvent("pageArrayChanged")]
private var pageArray : Array;
public var numPagesToDisplay : Number;
[ChangeEvent("pageSelected")]
function get currentPage() : Number
{
return __currentPage;
}
function set currentPage(cp : Number) : Void
{
__currentPage = cp;
dispatchEvent({type: 'pageSelected'});
}
[ChangeEvent("totalPagesChanged")]
function get totalPages() : Number
{
return __totalPages;
}
function set totalPages(tp : Number) : Void
{
__totalPages = tp;
if (pageArray == null) pageArray = new Array();
if (tp > pageArray.length)
{
for (var i = pageArray.length+1; i <= tp; ++i)
{
pageArray.push(i);
}
}
else if (tp < pageArray.length)
{
pageArray.splice(tp);
}
pageStringLength = String(tp).length;
dispatchEvent({type: 'totalPagesChanged'});
dispatchEvent({type: 'pageArrayChanged'});
}
private function moveToBeginning()
{
repeaterStartIndex = 0;
updateCurrentButton(undefined);
}
private function moveToEnd()
{
var mod = totalPages % numPagesToDisplay;
if (mod == 0) mod = numPagesToDisplay;
repeaterStartIndex = totalPages - mod;
updateCurrentButton(undefined);
}
private function previousPageGroup()
{
if (repeaterStartIndex - numPagesToDisplay >= 0)
{
updateCurrentButton(undefined);
repeaterStartIndex -= numPagesToDisplay;
}
}
private function nextPageGroup()
{
if (repeaterStartIndex + numPagesToDisplay < totalPages)
{
updateCurrentButton(undefined);
repeaterStartIndex += numPagesToDisplay;
}
}
private function selectPage(page) : Void
{
currentPage = page.getRepeaterItem();
updateCurrentButton(page);
}
function updateCurrentPage(newCurrentPage : Number) : Void
{
var butIndex = newCurrentPage % numPagesToDisplay;
repeaterStartIndex = newCurrentPage - butIndex;
selectPage(pageButton[butIndex]);
}
private function updateCurrentButton(cb : mx.controls.Link) : Void
{
if (currentButton != undefined)
{
currentButton.setStyle("color", undefined);
}
if (cb != undefined)
{
cb.setStyle("color", 0xAA0000);
}
currentButton = cb;
}
private function formatPageNumber(num : Number) : String
{
var str : String = String(num);
var diff : Number = pageStringLength - str.length;
if (showZero==1)
switch(diff)
{
case 0 : return str;
case 1 : return "0" + str;
case 2 : return "00" + str;
case 3 : return "000" + str;
case 4 : return "0000" + str;
case 5 : return "00000" + str;
default : return str; //don't worry about it
}
else
{
return str;
}
}
]]>
</mx:Script>
<mx:Metadata>
[Event("pageSelected")]
</mx:Metadata>
<mx:Link id="beginningButton" icon="@Embed('left2.jpg')" height="22" click="moveToBeginning()" enabled="{repeaterStartIndex > 0}"/>
<mx:Link id="prevPageButton" icon="@Embed('left.jpg')" height="22" click="previousPageGroup()" enabled="{repeaterStartIndex > 0}"/>
<mx:Repeater id="pageRepeater" dataProvider="{pageArray}" recycleChildren="true"
startingIndex="{repeaterStartIndex}" count="{numPagesToDisplay}">
<mx:Link id="pageButton" label="{formatPageNumber(pageRepeater.currentItem)}" click="selectPage(event.target)" />
</mx:Repeater>
<mx:Link id="nextPageButton" icon="@Embed('right.jpg')" height="22" click="nextPageGroup()" enabled="{repeaterStartIndex + numPagesToDisplay < totalPages}"/>
<mx:Link id="endButton" icon="@Embed('right2.jpg')" height="22" click="moveToEnd()" enabled="{repeaterStartIndex + numPagesToDisplay < totalPages}"/>
</mx:HBox>
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