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
显示页面
转换工具
pdfswf.exe 工具下载 http://www.swftools.org/download.html
<?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>