flex分页2 新新的，一页多次调用互相不冲突
直接先上源码;
分页组件Pager.mamx
<<?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" creationComplete="initHandler(event)"
xmlns:mx="library://ns.adobe.com/flex/mx" width="100%" height="100%" verticalAlign="middle">
<!--
/**
<p>
<code>
<control:PagingBar id="serverPagingBar1" url="USER_DATAGRID" datagrid="{userAdg}" pageSize="3"
destination="userFlexServices" methodName="getUsers" height="26" width="100%" />
</code>
</p>
*/
-->
<fx:Script>
<![CDATA[
import com.gwtjs.events.PagerEvent;
import mx.collections.ArrayCollection;
import mx.controls.Alert;
import mx.controls.DataGrid;
import mx.events.FlexEvent;
import mx.events.PropertyChangeEvent;
import mx.rpc.events.FaultEvent;
import mx.rpc.events.ResultEvent;
import mx.rpc.remoting.RemoteObject;
import mx.utils.ObjectProxy;
import spark.events.IndexChangeEvent;
private var pageProxy:ObjectProxy=new ObjectProxy();
[Bindable]//每页显示的条数
private var pageSizeBoxListData:ArrayCollection = new ArrayCollection([
{pageSize:10},
{pageSize:20},
{pageSize:30},
{pageSize:50},
{pageSize:100}
]);
[Bindable]//每页显示的记录数
public var pageSize:int = 10;
[Bindable]//当前页
public var curpage:int = 1;
[Bindable]//下一页到多少记录数
public var _offset:int = 1;
[Bindable]//总页数
public var totalPage:int = 0;
[Bindable]//总记录数
private var _allRecorders:int = 0;
[Bindable]//组件宽度
public var widthTo:int;
public function get pagerProxy():ObjectProxy
{
return pageProxy;
}
public function set pagerProxy(value:ObjectProxy):void
{
pageProxy = value;
}
public function get offset():int
{
return _offset;
}
public function set offset(value:int):void
{
_offset = value;
}
public function get allRecorders():int
{
return _allRecorders;
}
public function set allRecorders(value:int):void
{
_allRecorders = value;
}
/**
*
*/
protected function progressBarClickHandler(event:MouseEvent):void
{
var bc:HBox = HBox(event.target);
widthTo = event.localX;
//progressBarEffect.target = progressBarPagerBlue;
//progressBarEffect.play();
}
/**
*
*/
private function getMinimum():int
{
if(allRecorders < 1)
{
return 0;
}
else
{
return 1;
}
}
/**
*
*/
protected function pageFirstClickHandler(event:MouseEvent):void
{
curpage = getMinimum();
getBtnEnabled();
pagingRemoteObject();
}
/**
* 上一页
*/
protected function pagePrevClickHandler(event:MouseEvent):void
{
var tempNum:int = getMinimum();
curpage = curpage - 1;
getBtnEnabled();
pagingRemoteObject();
}
/**
* 跳转到指定页
*/
protected function pageStepperClickHandler(event:MouseEvent):void
{
curpage = pageStepper.value;
}
/**
* 下一页
*/
protected function pageNextClickHandler(event:MouseEvent):void
{
if(curpage < totalPage)
{
curpage = curpage + 1;
}
getBtnEnabled();
pagingRemoteObject();
}
/**
* 最后一页
*/
protected function pageLastClickHandler(event:MouseEvent):void
{
curpage = totalPage;
getBtnEnabled();
pagingRemoteObject();
}
/**
* 刷新当前页
*/
protected function pageRefreshClickHandler(event:MouseEvent):void
{
totalPage = getTotalPageNum();
pagingRemoteObject();
}
/**
* 初始化函数
*/
protected function initHandler(event:FlexEvent):void
{
pagerProxy.addEventListener(PropertyChangeEvent.PROPERTY_CHANGE, changeMethod);
trace("1111",offset,pageSize,_allRecorders,allRecorders);
totalPage = getTotalPageNum();getBtnEnabled();
//pagingRemoteObject();
}
private function changeMethod(evt:PropertyChangeEvent):void {
if(evt.newValue){ //值有改变
allRecorders = Number(evt.newValue);
totalPage = getTotalPageNum();getBtnEnabled();
trace("变化的属性名称："+evt.property.toString()+"|新值："+evt.newValue);
trace("发生更改的对象(在监听对象的时候特别有用)："+evt.source+"|旧值："+evt.oldValue);
}
}
/**
* 设置每页显示多少条记录
*/
protected function pageSizeComboboxChangeHandler(event:IndexChangeEvent):void
{
var obj:Object = pageSizeCombobox.selectedItem;
pageSize = obj.pageSize;
//trace(offset,"",pageSize);
}
/**
* 求总页面数
* //计算总页面数-->总页数=(总记录数+每页显示的记录数-1)/每页显示的记录数
* */
private function getTotalPageNum():int
{
//trace('getTotalPageNum',offset,pageSize,_allRecorders,allRecorders);
return (_allRecorders + pageSize - 1) / pageSize;
}
/**
* 获取总页数
*/
private function getBtnEnabled():void
{
if(totalPage<=1)//所有按钮全灰掉
{
pageFirstBtn.enabled = false;
pagePrevBtn.enabled = false;
pageNextBtn.enabled = false;
pageLastBtn.enabled = false;
refrePageBtn.enabled = false;
}else if(curpage==1){ //当前在第一页
pageFirstBtn.enabled = false;
pagePrevBtn.enabled = false;
pageNextBtn.enabled = true;
pageLastBtn.enabled = true;
refrePageBtn.enabled = true;
}else if(curpage<totalPage && curpage > 1){ //当前在中间页数,不在第一页也不在最后一页
pageFirstBtn.enabled = true;
pagePrevBtn.enabled = true;
pageNextBtn.enabled = true;
pageLastBtn.enabled = true;
refrePageBtn.enabled = true;
}else if(curpage==totalPage){ //当前在最后一页
pageFirstBtn.enabled = true;
pagePrevBtn.enabled = true;
pageNextBtn.enabled = false;
pageLastBtn.enabled = false;
refrePageBtn.enabled = true;
}
/**如果有页数则刷新可用*/
if(totalPage > 0)
{
refrePageBtn.enabled = true;
}else{
refrePageBtn.enabled = false;
}
}
/**
* 服务请求成功的处理
*/
private function serviceSuccessResult(event:ResultEvent):void
{
var results:ArrayCollection = ArrayCollection(event.result.list);
trace("共"+_allRecorders+"条记录","每页显示",results,"\n当前页",curpage);
totalPage = getTotalPageNum();
pageStepper.value = curpage;
getBtnEnabled();
//发事件到上级视图
this.dispatchEvent(new Event("myFunction"));
}
/**
* 服务请求失败的处理
*/
private function httpServiceFault(event:FaultEvent):void
{
var str:String = "客户端异常";
var index:int = -1;
var faultCode:String = event.fault.faultCode.toString();
index = faultCode.indexOf("Server", 0);
if(index!=-1)
{
str= "服务端异常";
}
//trace(index,str);
//客户端的faultCode以Client开头,服务器端的faultCode以Server开头
Alert.show(event.fault.toString(),faultCode);
trace(event.fault.toString());
}
/**
* 这里不发送服务请求，而是将计算后的结果返回给调用的页面，供调用的页面发送服务请求
*/
private function pagingRemoteObject():void
{
//var remote:RemoteObject = new RemoteObject(destination);
//页面偏移量这里计划好了,java不需要计算了
offset = (curpage - 1) * pageSize;
trace("pageSize",pageSize,"offset",offset);
/*remote.getOperation(methodName).send(pageSize,_offset);
remote.addEventListener(ResultEvent.RESULT,serviceSuccessResult);
remote.addEventListener(FaultEvent.FAULT,httpServiceFault);*/
//这里调用上级的方法发请求，这里不发了．
//发事件到上级视图
var pager:Object = new Object();
pager.offset = offset;
pager.pageSize = pageSize;
//发事件到上级视图
this.dispatchEvent(new PagerEvent("myPagerEvent",pager));
}
protected function refrePageBtnClickHandler(event:MouseEvent):void
{
var obj:Object = pageSizeCombobox.selectedItem;
pageSize = obj.pageSize;
//Alert.show("每页显示,"+pageSize.toString());
curpage = pageStepper.value;
getBtnEnabled();
pagingRemoteObject();
}
private function pageHSliderChangeHandler(event:Event):void
{
curpage = pageStepper.value;
getBtnEnabled();
pagingRemoteObject();
}
]]>
</fx:Script>
<fx:Declarations>
<!-- 将非可视元素（例如服务、值对象）放在此处 -->
</fx:Declarations>
<fx:Metadata>
[Event(name="myPagerEvent",type="com.gwtjs.events.PagerEvent")]
</fx:Metadata>
<mx:HBox width="30%" height="100%" verticalAlign="middle">
<mx:LinkButton styleName="pageFirstBtn" id="pageFirstBtn" enabled="false" click="pageFirstClickHandler(event)" />
<mx:LinkButton styleName="pagePrevBtn" id="pagePrevBtn" enabled="false" click="pagePrevClickHandler(event)" />
<mx:LinkButton styleName="pageNextBtn" id="pageNextBtn" enabled="false" click="pageNextClickHandler(event)" />
<mx:LinkButton styleName="pageLastBtn" id="pageLastBtn" enabled="false" click="pageLastClickHandler(event)" />
<mx:HBox width="40%" height="100%" verticalAlign="middle">
<s:Label text="Page" />
<s:NumericStepper id="pageStepper" width="78" click="pageStepperClickHandler(event)"
maximum="{totalPage}" minimum="{_allRecorders!=0?1:0}" value="{curpage}" />
<s:Label text=" Of " />
<s:Label id="totalPageLab" text="{totalPage}" />
</mx:HBox>
</mx:HBox>
<mx:HBox verticalAlign="middle">
<s:ComboBox dataProvider="{pageSizeBoxListData}" skinClass="assets.skin.ComboBoxTextInputEditSkin" selectedIndex="1" width="60" labelField="pageSize"
id="pageSizeCombobox" change="pageSizeComboboxChangeHandler(event)" />
<s:Label text=" of {_allRecorders} " />
<mx:LinkButton id="refrePageBtn" click="refrePageBtnClickHandler(event)" styleName="myRrfreshBtn" />
</mx:HBox>
<!--
<mx:LinkButton styleName="pageRefreshBtn" id="pageRefreshBtn" click="pageRefreshClickHandler(event)"/>
-->
<mx:HBox width="100%" height="100%" click="progressBarClickHandler(event)" verticalAlign="middle">
<s:HSlider width="98%" stepSize="1" dataTipPrecision="0"
maximum="{totalPage}" minimum="{_allRecorders!=0?1:0}" value="{curpage}" change="pageHSliderChangeHandler(event)"/>
</mx:HBox>
<s:BorderContainer x="0" y="0" width="40%" height="20" borderColor="0x336699" textAlign="center" visible="false">
<s:Group id="hgimg" x="0" y="0" width="100%" height="100%" clipAndEnableScrolling="true">
<mx:HBox width="60%" height="18" styleName="progressBarPageBlue" id="progressBarPageBlue">
</mx:HBox>
<mx:HBox width="96%" height="100%" paddingLeft="3" x="2" horizontalAlign="center" verticalAlign="middle">
<s:Label text="Displaying "/>
<s:Label text="{pageSize*curpage - 1 - pageSize}" id="pageStartLab"/>
<s:Label text="-"/>
<s:Label text="{pageSize*curpage - 1}" id="pageSizeLab"/>
<s:Label text="of"/>
<s:Label text="{_allRecorders}" id="allRecordsLab"/>
</mx:HBox>
</s:Group>
</s:BorderContainer>
</mx:HBox>
分页组件主要负责以下任务：
1.处理按钮效果，当前第一页则第一页按钮和上页则灰掉，反之则然，等．．．；
2.计算分页参数，如多少页，每页显示多少条，剩下多少页...；
3.处理完参数将参数使用事件传递给主页面，供主页面调用服务时使用；
分页事件－－PagerEvent.as
package com.gwtjs.events
{
import flash.events.Event;
public class PagerEvent extends Event
{
private var _pager:Object;
public function set item(item:Object):void{
this._pager = item;
}
public function get item():Object{
return this._pager;
}
public function PagerEvent(type:String,obj:Object, bubbles:Boolean=false, cancelable:Boolean=false)
{
super(type, bubbles, cancelable);
this._pager = obj;
}
}
}
事件主要传递分页时的参数offset和pageSize
Test.mamx
<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx"
creationComplete="initHandler(event)" width="99%" height="680" xmlns:components="com.gwtjs.components.*">
<s:layout>
<s:BasicLayout/>
</s:layout>
<fx:Style source="assets/styles/main.css" />
<fx:Style source="assets/styles/icons.css" />
<fx:Script>
<![CDATA[
import com.gwtjs.events.PagerEvent;
import com.gwtjs.renderer.grid.EnableItemIFactory;
import com.gwtjs.util.SimpleIndexUtil;
import com.gwtjs.window.RoleEditorWindow;
import mx.collections.ArrayCollection;
import mx.controls.Alert;
import mx.events.CloseEvent;
import mx.events.FlexEvent;
import mx.managers.PopUpManager;
import mx.rpc.events.FaultEvent;
import mx.rpc.events.ResultEvent;
[Bindable]
[Embed("assets/images/user_edit.png")]
private var userEditorIcon:Class;
[Bindable]
[Embed("assets/images/user_add.png")]
private var userAddIcon:Class;
[Bindable] //叶子节点
[Embed(source="assets/images/user_delete.png")]
private var userDeleteIcon:Class;
[Bindable] //定义渲染器 - 是否
private var enabledRender:IFactory = new EnableItemIFactory();
[Bindable] //叶子节点
[Embed(source="assets/images/arrow_refresh_small.png")]
private var refreshBtnIcon:Class;
[Bindable]
private var indexRenderer:Class = SimpleIndexUtil;
[Bindable]
private var rolesArray:ArrayCollection = new ArrayCollection([
{roleId:"10",roleName:"系统管理员",status:1,roleAuths:"",rolesAuthNames:"",roleDesc:"系统管理员,可操作其它角色,具备全部权限" },
{roleId:"20",roleName:"安全管理员",status:1,roleAuths:"",rolesAuthNames:"",roleDesc:"系统管理员,可以自提漏洞工单的需求"},
{roleId:"30",roleName:"检测负责人",status:1,roleAuths:"",rolesAuthNames:"",roleDesc:"系统管理员,检测漏洞"},
{roleId:"40",roleName:"修复负责人",status:1,roleAuths:"",rolesAuthNames:"",roleDesc:"修复负责人,修复漏洞"}
]);
private static var time:String = "2014-12-29 18:33:22";
import mx.formatters.DateFormatter;
public function compareTime(str:String):Boolean
{
var myPattern1:RegExp=/-|:| /g;
var dateFormatter:DateFormatter = new DateFormatter();
dateFormatter.formatString = "YYYY-MM-DD JJ:NN:SS";
var now:String= dateFormatter.format(new Date());
str = dateFormatter.format(str);
str = str.replace(myPattern1,'');
now = now.replace(myPattern1,'');
if(Number(str)>Number(now)){return true;}else{return false;}
}
/**
* 初始化函数
*/
protected function initHandler(event:FlexEvent):void
{
var bool:Boolean = compareTime(time);
if(bool){
RoleServicesController.getRoles();
}
}
/**添加角色*/
protected function roleAddClickHandler(event:MouseEvent):void
{
var itemEditorWindow:RoleEditorWindow = new RoleEditorWindow();
PopUpManager.addPopUp(itemEditorWindow,this,true);
PopUpManager.centerPopUp(itemEditorWindow);
//传值过去；
itemEditorWindow.title = "新增角色条目";
itemEditorWindow.action = "Insert";
itemEditorWindow.items = rolesArray;
itemEditorWindow.arrIndex = 3;
}
/**
* 修改角色
* */
protected function roleEditorClickHandler(event:MouseEvent):void
{
var index:int = rolesArrayGrid.selectedIndex;
var item:Object = rolesArray.getItemAt(index);
var itemEditorWindow:RoleEditorWindow = new RoleEditorWindow();
PopUpManager.addPopUp(itemEditorWindow,this,true);
PopUpManager.centerPopUp(itemEditorWindow);
//传值过去；
itemEditorWindow.title = "修改角色条目";
itemEditorWindow.action = "Update";
itemEditorWindow.items = rolesArray;
itemEditorWindow.item = item;
itemEditorWindow.arrIndex = 0;
}
/**
* 删除角色
* */
protected function roleRemoveClickHandler(event:MouseEvent):void
{
var item:Object = rolesArrayGrid.selectedItem;
Alert.show("确定要删除角色:"+item.roleName+"?","信息提示",(1|2),this,function(event:CloseEvent):void{
if(event.detail == Alert.YES){
for(var i:int=0;i<rolesArray.length;i++){
if(item.roleId==rolesArray[i].roleId){
rolesArray.removeItemAt(i);
}
}
}
});
}
/**
* 请求异常
* 客户端的faultCode以Client开头，服务器端的faultCode以Server开头
* */
private function httpServiceFault(event:FaultEvent):void
{
var str:String = "客户端异常";
var index:int = -1;
var faultCode:String = event.fault.faultCode.toString();
index = faultCode.indexOf("Server", 0);
if(index!=-1)
{
str= "服务端异常";
}
//trace(index,str);
//客户端的faultCode以Client开头,服务器端的faultCode以Server开头
Alert.show(event.fault.toString(),faultCode);
trace(event.fault.toString());
}
[Bindable]
private var endpoint:String = "http://127.0.0.1:8080/buganalysis";
override protected function createChildren():void {
if(ExternalInterface.available){
var pt:String = ExternalInterface.call("getEndopint");
trace("endpoint",pt,22222222222222);
if(pt!=null)
endpoint = pt;
}
super.createChildren();
}
/**
* 成功处理
* */
private function getRolesResultHandler(event:ResultEvent):void
{
rolesArray = ArrayCollection(event.result.userRoles);
allRecorders = Number(event.result.allRecorders);
//初始化分页中的总记录数
serverPagingBar1.pagerProxy.allRecorders = allRecorders;
}
[Bindable]
public var offset:int=0;
[Bindable]
public var pageSize:int=20;
[Bindable]
public var allRecorders:int = 0;
/**
* 当分页组件中的分页按钮点击时就会触发此函数
* */
public function myPagerEventHandler(event:PagerEvent):void
{
var obj:Object = event.item;
var bool:Boolean = compareTime(time);
trace("obj.offset",obj.offset,"obj.pageSize",obj.pageSize);
if(obj!=null){
offset = obj.offset;
pageSize = obj.pageSize;
}
if(bool){
RoleServicesController.getRoles();
}
}
]]>
</fx:Script>
<fx:Declarations>
<!-- 将非可视元素（例如服务、值对象）放在此处 -->
<s:RemoteObject id="RoleServicesController" destination="RoleServicesController" fault="httpServiceFault(event)"
endpoint="{endpoint}/messagebroker/amf">
<s:method name="getRoles" result="getRolesResultHandler(event)">
<s:arguments>
<offset>{offset}</offset>
<pageSize>{pageSize}</pageSize>
</s:arguments>
</s:method>
</s:RemoteObject>
</fx:Declarations>
<mx:VBox width="100%" height="100%" verticalGap="0">
<mx:HBox width="100%" height="32" horizontalAlign="left" styleName="panelTitleBg"
verticalAlign="middle" horizontalGap="0">
<mx:LinkButton icon="@Embed(source='assets/images/icons/grid.png')" color="#FFFFFF" fontWeight="bold" label="角色管理" />
</mx:HBox>
<mx:VBox width="100%" height="100%" id="gridMainLayout" verticalGap="6" horizontalAlign="center" horizontalGap="6" paddingLeft="6" paddingRight="6" paddingBottom="6" paddingTop="6" >
<mx:HBox width="100%" height="6" verticalAlign="middle" borderColor="#696969" backgroundColor="#E6E0E0" cornerRadius="6" visible="false" >
<mx:LinkButton label="新增角色" icon="{userAddIcon}" styleName="btnWeight" click="roleAddClickHandler(event)" />
<mx:LinkButton label="修改角色" icon="{userEditorIcon}" styleName="btnWeight" click="roleEditorClickHandler(event)" />
<mx:LinkButton label="删除角色" icon="{userDeleteIcon}" styleName="btnWeight" click="roleRemoveClickHandler(event)" />
<mx:HBox width="100%" />
<mx:LinkButton label="刷新" icon="{refreshBtnIcon}" />
</mx:HBox>
<mx:DataGrid id="rolesArrayGrid" headerStyleName="myHead" dataProvider="{rolesArray}"
rowCount="{rolesArray.length}" textAlign="center" width="100%" height="80%"
verticalGridLineColor="#CCCCCC" horizontalGridLines="true" horizontalGridLineColor="#CCCCCC">
<mx:columns>
<mx:DataGridColumn headerText="序号" itemRenderer="{new ClassFactory(indexRenderer)}" width="50" />
<mx:DataGridColumn headerText="角色名称" dataField="roleName" textAlign="left" width="160" />
<mx:DataGridColumn headerText="状态" dataField="status" textAlign="center" width="80" itemRenderer="{enabledRender}" />
<mx:DataGridColumn headerText="角色权限" dataField="rolesAuthNames" textAlign="left" width="180"/>
<mx:DataGridColumn headerText="角色说明" dataField="roleDesc" textAlign="left" />
</mx:columns>
</mx:DataGrid>
<components:Pager id="serverPagingBar1"
myPagerEvent="myPagerEventHandler(event)"
offset="{offset}" pageSize="{pageSize}" allRecorders="{allRecorders}"
height="26" width="100%" />
</mx:VBox>
</mx:VBox>
</s:Application>
处理流程：
1.调用分页组件
<components:Pager id="serverPagingBar1" url="USER_DATAGRID" datagrid="{userDataGrid}"
myPagerEvent="userDataGridPagerEventHandler(event)"
myFunction="serverPagingBarFunctionHandler(event)" offset="{offset}" pageSize="{pageSize}"
destination="userFlexServices" methodName="getUsers" height="26" width="100%" />
这里传入初始分页参数offset页偏移量，pageSize每页大小，myPagerEvent为分页处理事件，组件处理完分页参数后就分发事件，主页面可以执行此分页函数请求服务；
请求服务处理完成功后，再次将offset和pageSize传入Pager组件，但总记录数为动态变量，是请求数据后才有的，有点延迟，所以在pager组件里添加了二次处理方法；
/**
* 成功处理
* */
private function getRolesResultHandler(event:ResultEvent):void
{
rolesArray = ArrayCollection(event.result.userRoles);
allRecorders = Number(event.result.allRecorders);
<strong>//初始化分页中的总记录数
<span style="color:#ff0000;">serverPagingBar1.pagerProxy.allRecorders = allRecorders;</span>
</strong> }