利用flex实现pdf显示

功能

1 显示pdf文件

2 分段加载，节省带宽

3 支持拖动，上一页、下一页、全屏、指定页面

源码下载

显示页面

转换工具

pdfswf.exe 工具下载 http://www.swftools.org/download.html

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<?xml version="1.0" encoding="utf-8"?>
<mx:Application creationComplete="init()" layout="vertical" verticalGap="0" horizontalGap="0" left="0" right="0" paddingTop="0" paddingLeft="0" paddingRight="0" paddingBottom="0"
                backgroundGradientColors="[0x999999,0x111111]" xmlns:mx="http://www.adobe.com/2006/mxml">
    <mx:Script>
        <![CDATA[
            import mx.events.IndexChangedEvent;
            import mx.controls.Alert;
            private var mc:MovieClip=null;
 
 
            private var path:String;
            //放大倍数
            private var zoom:Number=1;
            //第几部份
            private var part:int=0;
            //当前页
            private var page:int=0;
            //每页大小
            private var pageSize:int=0;
            //所有页面数量
            private var totalPage:int=0;
            private var dig:Dialog;
 
            public function init():void
            {
                dig=new Dialog(this, true);
                //if (this.parameters.hasOwnProperty("swf"))
                if (!this.parameters.hasOwnProperty("swf"))
                {
                    //path=this.parameters.swf;
                    path="pdf/source_25_5";
                    this.LoadSwf(part);
                }
                else
                {
                    //Alert.show("swf参数不正确");
                    dig.open("swf参数不正确", "swf参数不正确", true);
                }
            }
 
 
            public function LoadSwf(part:int, goPage:int=1):void
            {
                dig.open("当前操作", "正在加载文件，请稍等");
                pageSize=int(path.substring(path.lastIndexOf("_") + 1, path.length));
                totalPage=int(path.substring(path.indexOf("_") + 1, path.lastIndexOf("_")));
                var folder:String=path.substring(path.indexOf("/") + 1, path.length);
                //var fileName:String=path.substring(path.indexOf("/") + 1, path.indexOf("_"));
 
                page=goPage;
                loader.source=path + "/" + part + ".swf";
 
                loader.addEventListener(Event.COMPLETE, function(e:Event):void
                    {
                        mc=(e.target as SWFLoader).content as MovieClip;
                        this.total=mc.totalFrames;
 
                        mc.gotoAndStop(goPage);
 
                        //page=1;
 
                        changeState();
                        zoom=Number(loader.width) / mc.width;
                        loader.height=mc.height * zoom;
                        dig.close();
                        loader.addEventListener(MouseEvent.MOUSE_DOWN, beginDrag);
                    });
                loader.addEventListener(IOErrorEvent.IO_ERROR, function():void
                    {
                        dig.close();
                        dig.open("当前操作", "你查看的文件不存在");
                    //Alert.show("你查看的文件不存在");
                    });
                loader.load();
                this.lbTotal1.text=this.lbTotal2.text=totalPage + "页";
 
            }
 
 
 
            private function btnFull_click(e:Event):void
            {
                stage.displayState=(stage.displayState == StageDisplayState.NORMAL ? StageDisplayState.FULL_SCREEN : StageDisplayState.NORMAL);
                if (this.stage.displayState == StageDisplayState.FULL_SCREEN)
                {
                    this.btnFull1.label="返回";
                }
                else
                {
                    this.btnFull1.label="全屏";
                }
                this.main.height=this.height - 50;
                title1.width=title2.width=main.width=width;
                btnFull2.x=btnFull1.x=this.width - 50;
            }
 
            private function btnNext_click(e:Event):void
            {
                if (page == mc.totalFrames)
                {
                    part++;
                    //page=0;
                    LoadSwf(part);
                    changeState();
                }
                else
                {
                    page++;
                    mc.gotoAndStop(page);
                    changeState();
                }
                trace(this.box.verticalScrollPosition);
 
            }
 
            private function btnPre_click(e:Event):void
            {
 
                page--;
                if (page == 0 && part != 0)
                {
                    part--;
                    LoadSwf(part, pageSize);
                }
                else
                {
                    //trace(page);
                    mc.gotoAndStop(page);
                }
                changeState();
 
            }
 
 
 
            private function changeState():void
            {
                this.txtCurrent2.text=this.txtCurrent1.text=String(part * pageSize + page);
                //this.lbTotal2.text=this.lbTotal1.text=String(total);
                if (part == 0 && page == 1)
                {
                    this.btnPre2.enabled=this.btnPre1.enabled=false;
                }
                else if ((part + 1) * page == this.totalPage)
                {
                    this.btnNext2.enabled=this.btnNext1.enabled=false;
                }
                else
                {
                    this.btnPre2.enabled=this.btnPre1.enabled=true;
                    this.btnNext2.enabled=this.btnNext1.enabled=true;
                }
                this.main.height=this.height - 50;
                title1.width=title2.width=main.width=width;
                btnFull2.x=btnFull1.x=this.width - 50;
                if (mc != null)
                {
                    //Alert.show("mc.width"+mc.width);
                    //mc.x=(this.width-mc.width*zoom)/2;
                }
                if (part == totalPage / pageSize)
                {
                    totalPage=(part - 1) * pageSize + mc.totalFrames;
                }
                this.lbTotal1.text=this.totalPage.toString();
                this.main.verticalScrollPosition=0;
            }
 
            private function btnZooomIn_click(e:Event):void
            {
                mc.height*=1.1;
                mc.width*=1.1;
 
            }
 
            private function txtCurrent_change(e:KeyboardEvent):void
            {
                if (e.keyCode == 13)
                {
                    var input:int=int(txtCurrent1.text);
                    if (input > totalPage || input < 0)
                    {
                        dig.open("系统提示", "页码不合法", false);
                        return;
                    }
 
                    part=(input / pageSize);
                    page=(input) % pageSize;
                    if (page == 0)
                    {
                        part=part - 1;
                        page=pageSize;
                    }
                    this.LoadSwf(part, page);
                    changeState();
                }
 
            }
 
            private function btnZooomOut_click(e:Event):void
            {
                mc.height*=0.9;
                mc.width*=0.9;
            }
             
            //拖动
         
 
            public function beginDrag(e:MouseEvent):void
            {
                loader.startDrag();
                e.target.filters=[new DropShadowFilter(10, 45, 0x88888888)];
                e.updateAfterEvent();
                loader.addEventListener(MouseEvent.MOUSE_UP, endDrag);
                loader.removeEventListener(MouseEvent.MOUSE_DOWN, beginDrag);
            }
 
            public function endDrag(e:Event):void
            {
                loader.stopDrag();
                e.target.filters=[];
                loader.addEventListener(MouseEvent.MOUSE_DOWN, beginDrag);
                loader.removeEventListener(MouseEvent.MOUSE_UP, endDrag);
             
            }
        ]]>
    </mx:Script>
    <mx:Canvas id="title1" width="1007" height="25" alpha="0.8" backgroundColor="#80C6F2" fontSize="9">
        <mx:Button x="131" y="1" label="<" id="btnPre1" click="btnPre_click(event)"/>
        <mx:Button x="3" y="1" label="<<" id="btnClose1"/>
        <mx:Button x="326" y="1" label="+" click="btnZooomIn_click(event)"/>
        <mx:Button x="380" y="1" label="-" click="btnZooomOut_click(event)"/>
        <mx:Button x="900" id="btnFull1" y="1" click="btnFull_click(event)" label="全屏"/>
        <mx:Button x="259" y="1" label=">" id="btnNext1" click="btnNext_click(event)"/>
        <mx:Text x="226" y="4" text="1" id="lbTotal1"/>
        <mx:TextInput x="179" y="1" keyUp="txtCurrent_change(event)" width="46" id="txtCurrent1"/>
    </mx:Canvas>
    <mx:Canvas y="0" id="main" width="1007" verticalScrollPolicy="on" backgroundColor="#666666">
        <mx:VBox id="left" width="0" height="100%" horizontalGap="0" backgroundColor="#ffffff"/>
        <mx:VBox id="box" styleName="boxtop" width="{main.width-16}" verticalScrollPolicy="off" horizontalCenter="true" verticalGap="0">
            <mx:SWFLoader useHandCursor="true" buttonMode="true" bottom="2" id="loader" width="{main.width-20}" showBusyCursor="false" height="100%"/>
        </mx:VBox>
    </mx:Canvas>
    <mx:Canvas id="title2" width="1007" height="25" alpha="0.8" backgroundColor="#80C6F2" fontSize="9">
        <mx:Button x="131" y="1" label="<" id="btnPre2" click="btnPre_click(event)"/>
        <mx:Button x="3" y="1" label="<<" id="btnClose2"/>
        <mx:Button x="326" y="1" label="+" click="btnZooomIn_click(event)"/>
        <mx:Button x="380" y="1" label="-" click="btnZooomOut_click(event)"/>
        <mx:Button x="900" id="btnFull2" y="1" click="btnFull_click(event)" label="全屏"/>
        <mx:Button x="259" y="1" label=">" id="btnNext2" click="btnNext_click(event)"/>
        <mx:Text x="226" y="4" text="1" id="lbTotal2"/>
        <mx:TextInput x="179" keyUp="txtCurrent_change(event)" y="1" width="46" id="txtCurrent2"/>
    </mx:Canvas>
    <mx:Style source="global.css"/>
</mx:Application>

<?xml version="1.0" encoding="utf-8"?>
<mx:Application creationComplete="init()" layout="vertical" verticalGap="0" horizontalGap="0" left="0" right="0" paddingTop="0" paddingLeft="0" paddingRight="0" paddingBottom="0"
               backgroundGradientColors="[0x999999,0x111111]" xmlns:mx="http://www.adobe.com/2006/mxml">
   <mx:Script>
       <![CDATA[
           import mx.events.IndexChangedEvent;
           import mx.controls.Alert;
           private var mc:MovieClip=null;

           private var path:String;
           //放大倍数
           private var zoom:Number=1;
           //第几部份
           private var part:int=0;
           //当前页
           private var page:int=0;
           //每页大小
           private var pageSize:int=0;
           //所有页面数量
           private var totalPage:int=0;
           private var dig:Dialog;

           public function init():void
           {
               dig=new Dialog(this, true);
               //if (this.parameters.hasOwnProperty("swf"))
               if (!this.parameters.hasOwnProperty("swf"))
               {
                   //path=this.parameters.swf;
                   path="pdf/source_25_5";
                   this.LoadSwf(part);
               }
               else
               {
                   //Alert.show("swf参数不正确");
                   dig.open("swf参数不正确", "swf参数不正确", true);
               }
           }

           public function LoadSwf(part:int, goPage:int=1):void
           {
               dig.open("当前操作", "正在加载文件，请稍等");
               pageSize=int(path.substring(path.lastIndexOf("_") + 1, path.length));
               totalPage=int(path.substring(path.indexOf("_") + 1, path.lastIndexOf("_")));
               var folder:String=path.substring(path.indexOf("/") + 1, path.length);
               //var fileName:String=path.substring(path.indexOf("/") + 1, path.indexOf("_"));

               page=goPage;
               loader.source=path + "/" + part + ".swf";

               loader.addEventListener(Event.COMPLETE, function(e:Event):void
                   {
                       mc=(e.target as SWFLoader).content as MovieClip;
                       this.total=mc.totalFrames;

                       mc.gotoAndStop(goPage);

                       //page=1;

                       changeState();
                       zoom=Number(loader.width) / mc.width;
                       loader.height=mc.height * zoom;
                       dig.close();
                       loader.addEventListener(MouseEvent.MOUSE_DOWN, beginDrag);
                   });
               loader.addEventListener(IOErrorEvent.IO_ERROR, function():void
                   {
                       dig.close();
                       dig.open("当前操作", "你查看的文件不存在");
                   //Alert.show("你查看的文件不存在");
                   });
               loader.load();
               this.lbTotal1.text=this.lbTotal2.text=totalPage + "页";

           }

           private function btnFull_click(e:Event):void
           {
               stage.displayState=(stage.displayState == StageDisplayState.NORMAL ? StageDisplayState.FULL_SCREEN : StageDisplayState.NORMAL);
               if (this.stage.displayState == StageDisplayState.FULL_SCREEN)
               {
                   this.btnFull1.label="返回";
               }
               else
               {
                   this.btnFull1.label="全屏";
               }
               this.main.height=this.height - 50;
               title1.width=title2.width=main.width=width;
               btnFull2.x=btnFull1.x=this.width - 50;
           }

           private function btnNext_click(e:Event):void
           {
               if (page == mc.totalFrames)
               {
                   part++;
                   //page=0;
                   LoadSwf(part);
                   changeState();
               }
               else
               {
                   page++;
                   mc.gotoAndStop(page);
                   changeState();
               }
               trace(this.box.verticalScrollPosition);

           }

           private function btnPre_click(e:Event):void
           {

               page--;
               if (page == 0 && part != 0)
               {
                   part--;
                   LoadSwf(part, pageSize);
               }
               else
               {
                   //trace(page);
                   mc.gotoAndStop(page);
               }
               changeState();

           }

           private function changeState():void
           {
               this.txtCurrent2.text=this.txtCurrent1.text=String(part * pageSize + page);
               //this.lbTotal2.text=this.lbTotal1.text=String(total);
               if (part == 0 && page == 1)
               {
                   this.btnPre2.enabled=this.btnPre1.enabled=false;
               }
               else if ((part + 1) * page == this.totalPage)
               {
                   this.btnNext2.enabled=this.btnNext1.enabled=false;
               }
               else
               {
                   this.btnPre2.enabled=this.btnPre1.enabled=true;
                   this.btnNext2.enabled=this.btnNext1.enabled=true;
               }
               this.main.height=this.height - 50;
               title1.width=title2.width=main.width=width;
               btnFull2.x=btnFull1.x=this.width - 50;
               if (mc != null)
               {
                   //Alert.show("mc.width"+mc.width);
                   //mc.x=(this.width-mc.width*zoom)/2;
               }
               if (part == totalPage / pageSize)
               {
                   totalPage=(part - 1) * pageSize + mc.totalFrames;
               }
               this.lbTotal1.text=this.totalPage.toString();
               this.main.verticalScrollPosition=0;
           }

           private function btnZooomIn_click(e:Event):void
           {
               mc.height*=1.1;
               mc.width*=1.1;

           }

           private function txtCurrent_change(e:KeyboardEvent):void
           {
               if (e.keyCode == 13)
               {
                   var input:int=int(txtCurrent1.text);
                   if (input > totalPage || input < 0)
                   {
                       dig.open("系统提示", "页码不合法", false);
                       return;
                   }

                   part=(input / pageSize);
                   page=(input) % pageSize;
                   if (page == 0)
                   {
                       part=part - 1;
                       page=pageSize;
                   }
                   this.LoadSwf(part, page);
                   changeState();
               }

           }

           private function btnZooomOut_click(e:Event):void
           {
               mc.height*=0.9;
               mc.width*=0.9;
           }

           //拖动


           public function beginDrag(e:MouseEvent):void
           {
               loader.startDrag();
               e.target.filters=[new DropShadowFilter(10, 45, 0x88888888)];
               e.updateAfterEvent();
               loader.addEventListener(MouseEvent.MOUSE_UP, endDrag);
               loader.removeEventListener(MouseEvent.MOUSE_DOWN, beginDrag);
           }

           public function endDrag(e:Event):void
           {
               loader.stopDrag();
               e.target.filters=[];
               loader.addEventListener(MouseEvent.MOUSE_DOWN, beginDrag);
               loader.removeEventListener(MouseEvent.MOUSE_UP, endDrag);

           }
       ]]>
   </mx:Script>
   <mx:Canvas id="title1" width="1007" height="25" alpha="0.8" backgroundColor="#80C6F2" fontSize="9">
       <mx:Button x="131" y="1" label="<" id="btnPre1" click="btnPre_click(event)"/>
       <mx:Button x="3" y="1" label="<<" id="btnClose1"/>
       <mx:Button x="326" y="1" label="+" click="btnZooomIn_click(event)"/>
       <mx:Button x="380" y="1" label="-" click="btnZooomOut_click(event)"/>
       <mx:Button x="900" id="btnFull1" y="1" click="btnFull_click(event)" label="全屏"/>
       <mx:Button x="259" y="1" label=">" id="btnNext1" click="btnNext_click(event)"/>
       <mx:Text x="226" y="4" text="1" id="lbTotal1"/>
       <mx:TextInput x="179" y="1" keyUp="txtCurrent_change(event)" width="46" id="txtCurrent1"/>
   </mx:Canvas>
   <mx:Canvas y="0" id="main" width="1007" verticalScrollPolicy="on" backgroundColor="#666666">
       <mx:VBox id="left" width="0" height="100%" horizontalGap="0" backgroundColor="#ffffff"/>
       <mx:VBox id="box" styleName="boxtop" width="{main.width-16}" verticalScrollPolicy="off" horizontalCenter="true" verticalGap="0">
           <mx:SWFLoader useHandCursor="true" buttonMode="true" bottom="2" id="loader" width="{main.width-20}" showBusyCursor="false" height="100%"/>
       </mx:VBox>
   </mx:Canvas>
   <mx:Canvas id="title2" width="1007" height="25" alpha="0.8" backgroundColor="#80C6F2" fontSize="9">
       <mx:Button x="131" y="1" label="<" id="btnPre2" click="btnPre_click(event)"/>
       <mx:Button x="3" y="1" label="<<" id="btnClose2"/>
       <mx:Button x="326" y="1" label="+" click="btnZooomIn_click(event)"/>
       <mx:Button x="380" y="1" label="-" click="btnZooomOut_click(event)"/>
       <mx:Button x="900" id="btnFull2" y="1" click="btnFull_click(event)" label="全屏"/>
       <mx:Button x="259" y="1" label=">" id="btnNext2" click="btnNext_click(event)"/>
       <mx:Text x="226" y="4" text="1" id="lbTotal2"/>
       <mx:TextInput x="179" keyUp="txtCurrent_change(event)" y="1" width="46" id="txtCurrent2"/>
   </mx:Canvas>
   <mx:Style source="global.css"/>
</mx:Application>