Extjs上传附件实战开发，实现批量上传及在线预览功能（四）

在线预览功能：

      使用软件：FlexPaper1.5.6。

      FlexPaper为二次开发双版本，版本一为js控制文档打开，和网上很多资料类似，但完善了很多函数，具体说明见前文；版本二为FlexPaper直接获取地址参数打开文档，具体代码如下：

       版本一：

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
				xmlns:fp="com.devaldi.controls.flexpaper.*"
				layout="absolute" width="100%" height="100%" 
				applicationComplete="initApp();">
	
	<mx:Metadata>
		[ResourceBundle("FlexPaper")]
		[Event(name="onDocumentLoaded", type="com.devaldi.events.DocumentLoadedEvent")]
		[Event(name="onLoadingProgress", type="flash.events.ProgressEvent")]
		[Event(name="onDocumentLoadedError", type="flash.events.ErrorEvent")]
		[Event(name="onCurrPageChanged", type="com.devaldi.events.CurrentPageChangedEvent")]
		[Event(name="onDocumentLoading", type="flash.events.Event")]
		[Event(name="onExternalLinkClicked", type="com.devaldi.events.ExternalLinkClickedEvent")]
		[Event(name="onDocumentPrinted", type="com.devaldi.events.DocumentPrintedEvent")]
		[Event(name="onPageLoaded", type="com.devaldi.events.PageLoadedEvent")]
		[Event(name="onPageLoading", type="com.devaldi.events.PageLoadingEvent")]
		[Event(name="onErrorLoadingPage", type="com.devaldi.events.ErrorLoadingPageEvent")]
	</mx:Metadata>
	<mx:Script>
		<![CDATA[
			import mx.controls.Alert;
			import com.devaldi.events.CurrentPageChangedEvent;
			import com.devaldi.events.CursorModeChangedEvent;
			import com.devaldi.events.DocumentLoadedEvent;
			import com.devaldi.events.DocumentPrintedEvent;
			import com.devaldi.events.ErrorLoadingPageEvent;
			import com.devaldi.events.ExternalLinkClickedEvent;
			import com.devaldi.events.FitModeChangedEvent;
			import com.devaldi.events.ScaleChangedEvent;
			import com.devaldi.events.ViewModeChangedEvent;
			
			public var _aid:Number = 0;//文档ID
			
			[Bindable]
			public var _Scale:Number = 1;//缩放比例
			
			[Bindable]
			public var _EncodeURI:Boolean = true;
			
			[Bindable]
			public var _SwfFile:String = "";//SWF文件路径
			
			[Bindable]
			public var _ZoomTransition:String = "easeOut";
			
			[Bindable]
			public var _ZoomTime:Number = 0.6;
			
			[Bindable]
			public var _ZoomInterval:Number = 0.1;
			
			[Bindable]
			public var _MinZoomSize:Number = 0.3;
			
			[Bindable]
			public var _MaxZoomSize:Number = 5;
			
			[Bindable]
			public var _FitPageOnLoad:Boolean = false;//加载后适合高度
			
			[Bindable]
			public var _FitWidthOnLoad:Boolean = false;//加载后适合宽度
			
			[Bindable]
			public var _PrintEnabled:Boolean = true;//是否支持打印
			
			[Bindable]
			public var _FullScreenAsMaxWindow:Boolean = false;//是否支付全屏
			
			[Bindable]
			public var _ProgressiveLoading:Boolean = false;//是否延迟加载
			
			[Bindable]
			public var _localeChain:String = "zh_CN";//语言
			
			private var isFocus:Boolean = false;
			
			
			//------------------------
			[Bindable]
			public var _SearchMatchAll:Boolean = true;
			
			[Bindable]
			public var _PrintPaperAsBitmap:Boolean = false;
			
			[Bindable]
			public var _ViewModeToolsVisible:Boolean = true;
			
			[Bindable]
			public var _ZoomToolsVisible:Boolean = true;
			
			[Bindable]
			public var _NavToolsVisible:Boolean = true;
			
			[Bindable]
			public var _CursorToolsVisible:Boolean = true;
			
			[Bindable]
			public var _SearchToolsVisible:Boolean = true;
			//初始化参数
			private function initApp():void{
				var params:Object = Application.application.parameters;
				_Scale = getNumber(params, "Scale", 1);
				_SwfFile = getString(params, "SwfFile", "Paper.swf");
				_EncodeURI = getNumber(params, "EncodeURI", 1);
				_ZoomTransition = getString(params, "ZoomTransition", "easeOut");
				_ZoomTime = getNumber(params, "ZoomTime", 0.6);
				_MinZoomSize = getNumber(params, "MinZoomSize", 0.2);
				_MaxZoomSize = getNumber(params, "MaxZoomSize", 5);
				_ZoomInterval = getNumber(params, "ZoomInterval", 0.1);
				_FitPageOnLoad = getBoolean(params, "FitPageOnLoad", false);
				_FitWidthOnLoad = getBoolean(params, "FitWidthOnLoad", false);
				_PrintEnabled = getBoolean(params, "PrintEnabled", true);
				_FullScreenAsMaxWindow = getBoolean(params, "FullScreenAsMaxWindow", false);
				_ProgressiveLoading = getBoolean(params, "ProgressiveLoading", true);
				_localeChain = params["localeChain"];
				
				_SearchMatchAll=getBoolean(params, "SearchMatchAll", true);
				_PrintPaperAsBitmap=getBoolean(params, "PrintPaperAsBitmap", false);
				_ViewModeToolsVisible=getBoolean(params, "ViewModeToolsVisible", true);
				_ZoomToolsVisible=getBoolean(params, "ZoomToolsVisible", true);
				_NavToolsVisible=getBoolean(params, "NavToolsVisible", true);
				_CursorToolsVisible=getBoolean(params, "CursorToolsVisible", true);
				_SearchToolsVisible=getBoolean(params, "SearchToolsVisible", true);
				//注册事件监听
				this.addEventListener(MouseEvent.MOUSE_OVER, onMouseOver);
				this.addEventListener(MouseEvent.MOUSE_OUT, onMouseOut);
				this.addEventListener(MouseEvent.CLICK,setFocusTo);	
				this.addEventListener("onPageLoaded",pageLoadedEventHandler);	

				//开放给外部（javascript）调用
				ExternalInterface.addCallback("hasFocus", hasFocus);
				ExternalInterface.addCallback("setViewerFocus", setViewerFocus); 
				ExternalInterface.addCallback("gotoPage", gotoPage);
				ExternalInterface.addCallback("fitWidth", fitWidth);
				ExternalInterface.addCallback("fitHeight", fitHeight);
				ExternalInterface.addCallback("loadSwf", loadSwf);
				ExternalInterface.addCallback("printPaperRange", printPaperRange);
				ExternalInterface.addCallback("searchText", searchText);
				ExternalInterface.addCallback("prevSearchMatch", prevSearchMatch);
				ExternalInterface.addCallback("nextSearchMatch", nextSearchMatch);
				ExternalInterface.addCallback("switchMode", switchMode);
				ExternalInterface.addCallback("Zoom", Zoom);
				ExternalInterface.addCallback("nextPage", nextPage);
				ExternalInterface.addCallback("getCurrPage", getCurrPage);
				ExternalInterface.addCallback("prevPage", prevPage);
				ExternalInterface.addCallback("printPaper", printPaper);
				ExternalInterface.addCallback("getTotalPages", getTotalPages);
				
			}
			//---------------------------事件------------------------------
			protected function onLoadedError(event:ErrorEvent):void{
				dispatchEvent(event);	
			}
			private function setFocusTo(e:MouseEvent):void{
				stage.stageFocusRect = false;
				stage.focus = e.target as InteractiveObject;
			}
			private function onMouseOver(event:MouseEvent):void{
				this.isFocus = true;
			}
			
			private function onMouseOut(event:MouseEvent):void{
				this.isFocus = false;
			}
			protected function onCurrPageChanged(event:CurrentPageChangedEvent):void{
				dispatchEvent(event);
			}
			protected function documentLoadedErrorHandler(event:Event):void{
				dispatchEvent(event);
			}
						
			protected function onExternalLinkClickedHandler(event:ExternalLinkClickedEvent):void{
				dispatchEvent(event);
			}
			
			protected function onDocumentLoadingProgressHandler(event:ProgressEvent):void{
				dispatchEvent(event);
			}
			
			protected function papersLoadingHandler(event:Event):void{
				dispatchEvent(event);
			}
			
			protected function pageLoadingEventHandler(event:Event):void{
				dispatchEvent(event);
			}
			
			protected function documentPrintedHandler(event:DocumentPrintedEvent):void{
				dispatchEvent(event);
			}
			
			protected function documentLoadedHandler(event:Event):void{
				dispatchEvent(event);
			}	
			
			protected function pageLoadedEventHandler(event:Event):void{
				dispatchEvent(event);
			}
			
			protected function errorLoadingPageEventHandler(event:ErrorLoadingPageEvent):void{
				dispatchEvent(event);
			}
			//----------------------------函数-----------------------------
			public function getTotalPages():Number{
				return FlexPaper.getTotalPages();
			}

			public function printPaper(e:Event):void{
				FlexPaper.printPaper(e);
			}
			
			public function printPaperRange(range:String):void{
				FlexPaper.printPaperRange(range);
			}
			public function searchText(text:String):void{
				FlexPaper.searchText(text);				
			}		
			
			public function prevSearchMatch():void{
				FlexPaper.prevSearchMatch();
			}
			
			public function nextSearchMatch(text:String):void{
				FlexPaper.nextSearchMatch(text);
			}
			
			public function switchMode(mode:String=null):void{
				FlexPaper.switchMode(mode);
			}
			public function Zoom(factor:Number):void{
				FlexPaper.Zoom(factor);
			}
					
			public function nextPage():void{
				FlexPaper.nextPage();
			}	
						
			public function prevPage():void{
				return FlexPaper.prevPage();
			}
			public function getCurrPage():Number{
				return FlexPaper.getCurrPage();
			}
			public dynamic function loadSwf(s:String):void{
				FlexPaper.SwfFile = s;
			}
			public function fitHeight():void{
				FlexPaper.fitHeight();
			}	
			public function fitWidth():void{
				FlexPaper.fitWidth();
			}
			public function gotoPage(p:Number):void{
				FlexPaper.gotoPage(p);
			}			
			
			public function hasFocus():Boolean{
				return isFocus;
			}
			
			public function setViewerFocus(isFocus:Boolean):void{
				this.FlexPaper.setViewerFocus();
			}
			
			/**
			 * 
			 * 获取String类型参数
			 * 如果没有，则返回默认值
			 **/
			private function getString(params:Object, name:String, def:String):String{
				if(params[name] != null){
					return params[name];
				}
				return def;
			}
			
			private function getNumber(params:Object, name:String, def:Number):Number{
				if(params[name] != null){
					return params[name];
				}
				return def;
			}
			
			private function getBoolean(params:Object, name:String, def:Boolean):Boolean{
				if(params[name] != null){
					return params[name] == "true";
				}
				return def;
			}
		]]>
	</mx:Script>
	<fp:FlexPaperViewer id="FlexPaper"
						width="100%" 
						height="100%" 
						onDocumentLoaded="documentLoadedHandler(event)" 
						onDocumentLoading="papersLoadingHandler(event)"
						onDocumentLoadedError="documentLoadedErrorHandler(event)"					
						onLoadingProgress="onDocumentLoadingProgressHandler(event)"
						onCurrPageChanged="onCurrPageChanged(event)"
						onExternalLinkClicked="onExternalLinkClickedHandler(event)" 
						onDocumentPrinted="documentPrintedHandler(event)"
						onPageLoaded="pageLoadedEventHandler(event)"
						onPageLoading="pageLoadingEventHandler(event)"
						onErrorLoadingPage="errorLoadingPageEventHandler(event)"
						
						Scale="{_Scale}" 
						SwfFile="{_SwfFile}" 
						ZoomTransition="{_ZoomTransition}" 
						ZoomTime="{_ZoomTime}" 
						MinZoomSize="{_MinZoomSize}"
						MaxZoomSize="{_MaxZoomSize}"
						ZoomInterval="{_ZoomInterval}"
						FitPageOnLoad="{_FitPageOnLoad}"
						FitWidthOnLoad="{_FitWidthOnLoad}"
						EncodeURI="{_EncodeURI}"
						FullScreenAsMaxWindow="{_FullScreenAsMaxWindow}"
						ProgressiveLoading="{_ProgressiveLoading}"
						
						SearchMatchAll="{_SearchMatchAll}"
						PrintPaperAsBitmap="{_PrintPaperAsBitmap}"
						ViewModeToolsVisible="{_ViewModeToolsVisible}"
						ZoomToolsVisible="{_ZoomToolsVisible}"
						NavToolsVisible="{_NavToolsVisible}"
						CursorToolsVisible="{_CursorToolsVisible}"
						SearchToolsVisible="{_SearchToolsVisible}"
						locale="{_localeChain}"
						PrintEnabled="{_PrintEnabled}"
						/>
</mx:Application>

使用方法：

var fp = new FlexPaperViewer('divPDF',{ 
    			            	config : {
    			            		SwfFile :encodeURI(url+swf),
    			                    Scale : 0.6, 
    			                    ZoomTransition : 'easeOut',
    			                    ZoomTime : 0.5,
    			                    ZoomInterval : 0.1,
    			                    FitPageOnLoad : true,
    			                    FitWidthOnLoad : true,
    			                    PrintEnabled : false,
    			                    FullScreenAsMaxWindow : true,
    			                    ProgressiveLoading : true,
    			                    MinZoomSize : 0.2,
    			                    MaxZoomSize : 5,
    			                    SearchMatchAll : true,
    			                    InitViewMode : 'Portrait',
    			                    
    			                    ViewModeToolsVisible : true,
    			                    ZoomToolsVisible : true,
    			                    NavToolsVisible : true,
    			                    CursorToolsVisible : true,
    			                    SearchToolsVisible : true,
    			                    localeChain: 'zh_CN'
    			                }
    			            });          	

注：如果你没有修改过flexpaper_flash.js文件中的FlexPaperViewer()函数，请使用

var fp = new FlexPaperViewer(	
						 'FlexPaperViewer',
						 'divPDF', { config : {
						 SwfFile : escape('FusionCharts.swf'),
						 Scale : 0.6, 
						 ZoomTransition : 'easeOut',
						 ZoomTime : 0.5,
						 ZoomInterval : 0.2,
						 FitPageOnLoad : true,
						 FitWidthOnLoad : false,
						 FullScreenAsMaxWindow : false,
						 ProgressiveLoading : false,
						 MinZoomSize : 0.2,
						 MaxZoomSize : 5,
						 SearchMatchAll : false,
						 InitViewMode : 'Portrait',
						 PrintPaperAsBitmap : false,
						 ViewModeToolsVisible : true,
						 ZoomToolsVisible : true,
						 NavToolsVisible : true,
						 CursorToolsVisible : true,
						 SearchToolsVisible : true,  						
  						 localeChain: 'en_US'
						 
						 }});	

divPDF为flexpaper渲染到的容器ID,FlexPaperViewer为你的swf文件名，笔者就把该参数去掉，直接在flexpaper_flash.js文件中定义。

版本二：

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
				xmlns:fp="com.devaldi.controls.flexpaper.*"
				layout="absolute" width="100%" height="100%" 
				applicationComplete="initApp();">
	
	<mx:Script>
		<![CDATA[	
			
			[Bindable]
			public var _Scale:Number = 1;//缩放比例
			
			[Bindable]
			public var _EncodeURI:Boolean = true;
			
			[Bindable]
			public var _SwfFile:String = "";//SWF文件路径
			
			[Bindable]
			public var _ZoomTransition:String = "easeOut";
			
			[Bindable]
			public var _ZoomTime:Number = 0.6;
			
			[Bindable]
			public var _ZoomInterval:Number = 0.1;
			
			[Bindable]
			public var _MinZoomSize:Number = 0.3;
			
			[Bindable]
			public var _MaxZoomSize:Number = 5;
			
			[Bindable]
			public var _FitPageOnLoad:Boolean = false;//加载后适合高度
			
			[Bindable]
			public var _FitWidthOnLoad:Boolean = true;//加载后适合宽度
			
			[Bindable]
			public var _PrintEnabled:Boolean = false;//是否支持打印
			
			[Bindable]
			public var _FullScreenAsMaxWindow:Boolean = false;//是否支付全屏
			
			[Bindable]
			public var _ProgressiveLoading:Boolean = false;//是否延迟加载
			
			[Bindable]
			public var _localeChain:String = "zh_CN";//语言
			
			private var isFocus:Boolean = false;
			
			//初始化参数
			private function initApp():void{				
				_Scale = 1;
				_SwfFile = this.loaderInfo.parameters.url;
				_EncodeURI = true;
				_ZoomTransition = "easeOut";
				_ZoomTime = 0.6;
				_MinZoomSize = 0.2;
				_MaxZoomSize = 5;
				_ZoomInterval = 0.1;
				_FitPageOnLoad =false;
				_FitWidthOnLoad = true;
				_PrintEnabled = false;
				_FullScreenAsMaxWindow = false;
				_ProgressiveLoading = true;
				_localeChain ="zh_CN";//语言
				//注册事件监听
				this.addEventListener(MouseEvent.MOUSE_OVER, onMouseOver);
				this.addEventListener(MouseEvent.MOUSE_OUT, onMouseOut);
				
			}
			//---------------------------事件------------------------------

			private function onMouseOver(event:MouseEvent):void{
				this.isFocus = true;
			}
			
			private function onMouseOut(event:MouseEvent):void{
				this.isFocus = false;
			}
			
		]]>
	</mx:Script>
	<fp:FlexPaperViewer id="FlexPaper"
						width="100%" 
						height="100%" 
						
						Scale="{_Scale}" 
						SwfFile="{_SwfFile}" 
						ZoomTransition="{_ZoomTransition}" 
						ZoomTime="{_ZoomTime}" 
						MinZoomSize="{_MinZoomSize}"
						MaxZoomSize="{_MaxZoomSize}"
						ZoomInterval="{_ZoomInterval}"
						FitPageOnLoad="{_FitPageOnLoad}"
						FitWidthOnLoad="{_FitWidthOnLoad}"
						EncodeURI="{_EncodeURI}"
						FullScreenAsMaxWindow="{_FullScreenAsMaxWindow}"
						ProgressiveLoading="{_ProgressiveLoading}" />
</mx:Application>

其中 this.loaderInfo.parameters.url  是获取加载该flash的地址参数，并非当前url地址的参数，这样修改主要目的是加载flexpaper时好传递参数。

第一种版本实现很简单，效果如下：

 第二种版本可直接在浏览器地址输入：http://192.168.1.100/Diyflexpaper_url.swf?url=1.swf

 注意，这里url地址可以是网络地址（只要有权限）、服务器存放swf地址。

效果如下

当然这种方式信息暴露太明显了，客户一看就知识用发什么东西，打开的地址等，所以我们可以单独编写一个html文件，打开文档即可。

 到此，文档上传并在线预览功能已全部总结完毕，欢迎阅者提出意见。

作者： kunoy

出处： http://blog.csdn.net/kunoy

申明：作者写博是为了总结经验，和交流学习之用。
如需转载，请尽量保留此申明，并在文章页面明显位置给出原文连接。谢谢！