裁剪图片

<?xml version="1.0" encoding="utf-8"?>
<mx:TitleWindow xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" width="416" height="352" showCloseButton="true"
	creationComplete="init()" title="图片上传" xmlns:components="com.teamsun.framework.components.*" close="titlewindow1_closeHandler(event)">
		<mx:Script>
		<![CDATA[
			import com.flex3.events.WindowCloseEvent;
			import com.flex3.util.CommonFunctions;
			import com.teamsun.framework.common.pojo.Designcomponent;
			import com.teamsun.framework.design.ws.IDesigncomponentServiceWSRO;
			
			import flash.net.FileReference;
			
			import mx.events.CloseEvent;
			import mx.events.FlexEvent;
			import mx.events.MoveEvent;
			import mx.graphics.codec.JPEGEncoder;
			import mx.managers.PopUpManager;
			import mx.rpc.events.ResultEvent;
		
		
			private var file: FileReference;
			private var size:String;
			private var fileName:String;
			private var filePath:String = "";
			private var request:URLRequest;
			
			public var comp:Designcomponent;
			
			
			private function init(): void{
				Security.allowDomain("*");
			}
			
			private function upload():void
			{
				file = new FileReference();
				file.addEventListener(Event.SELECT, file_selectHandler);
				file.addEventListener(Event.COMPLETE, file_completeHandler);
				file.browse(new Array(new FileFilter("图像文件 (*.jpg,*.gif,*.png)", "*.jpg; *.gif; *.png")));
			}
			
			private function file_selectHandler(event:Event):void
			{
				file.load();
			}
			
			private function file_completeHandler(event:Event):void
			{
				if (file.data.length>0)
				{
					picture.source = file.data;
				}
				else
				{
					CommonFunctions.showInfo("错误提示","图片加载错误!");
				}
			}
			
			
			private function cutPicture():void
			{
				var bx:Number = cutPictureBox.x - picture.x;
				var by:Number = cutPictureBox.y - picture.y ;
				var bw:Number = cutPictureBox.boxWidth ;
				var bh:Number = cutPictureBox.boxHeight ;
				var pictureBD:BitmapData = new BitmapData(picture.width, picture.height);
				pictureBD.draw(picture);
				var pixels:ByteArray = pictureBD.getPixels(new Rectangle(bx, by, bw, bh)); 
				pixels.position=0;
				var cutBD:BitmapData = new BitmapData(bw, bh);
				cutBD.setPixels(new Rectangle(0, 0, bw, bh), pixels);
				var sb:Bitmap = new Bitmap(cutBD);
				sb.smoothing = true;
				sb.pixelSnapping = PixelSnapping.ALWAYS;
				preImg.source = sb;
				
			}
			private function save():void
			{
				confimBtn.enabled = false;
				var picture:ByteArray = null;
				if (preImg.source is Bitmap)
				{
					var bitmapData:BitmapData = new BitmapData(preImg.width, preImg.height); 
					bitmapData.draw(preImg); 
					picture = new JPEGEncoder(100).encode(bitmapData);
					IDesigncomponentServiceWSRO.INSTANCE.updateComponentImg(comp,picture,on_updateComponentImg_handle,CommonFunctions.faultmethod);
				}
				else(preImg.source is ByteArray)
				{
					picture = preImg.source as ByteArray;
					IDesigncomponentServiceWSRO.INSTANCE.updateComponentImg(comp,picture,on_updateComponentImg_handle,CommonFunctions.faultmethod);
					
				} 
			}
			
			private function on_updateComponentImg_handle(event:ResultEvent):void
			{
				confimBtn.enabled = true;
				var reobj:Object = event.result;
				if(reobj)
				{
					if(reobj.isSuccued == true){
						var closeevent:WindowCloseEvent = new WindowCloseEvent(WindowCloseEvent.WINDOW_CLOSE);
						closeevent.IsConfirm = true;    
						closeevent.ReturnValue = reobj.value;
						dispatchEvent(closeevent);	
						PopUpManager.removePopUp(this);	
					}
					CommonFunctions.showInfo("提示",reobj.message);
				}else
				{
					CommonFunctions.showInfo("提示","操作失败!");
				}
			}
			
			protected function picture_completeHandler(event:Event):void
			{
				picture.x = 0;
				picture.y = 0;
				cutPictureBox.x = 0;
				cutPictureBox.y = 0;
			}
			
			protected function picture_ioErrorHandler(event:IOErrorEvent):void
			{
				CommonFunctions.showInfo("错误提示","图片加载错误!");
			}

			protected function titlewindow1_closeHandler(event:CloseEvent):void
			{
				PopUpManager.removePopUp(this);	
			}
			
			private var lockX:Number;
			private var lockY:Number;
			private var isMove:Boolean = false;
			protected function picture_mouseDownHandler(event:MouseEvent):void
			{
				isMove = true;
				lockX = event.localX;
				lockY = event.localY;
			}


			protected function picture_mouseMoveHandler(event:MouseEvent):void
			{
				if(isMove)
				{
					var tempX:Number =  event.localX - lockX;
					var tempY:Number = event.localY - lockY;
					picture.x += tempX;
					picture.y += tempY;
					
					cutPictureBox.x +=tempX;
					cutPictureBox.y +=tempY;
					
				}
			}


			protected function picture_mouseUpHandler(event:MouseEvent):void
			{
				if(!cutPictureBox.visible)
				{
					return;
				}
				isMove = false;
				cutPicture();
			}


			protected function picture_doubleClickHandler(event:MouseEvent):void
			{
				var tempX:Number =  cutPictureBox.boxWidth;
				var tempY:Number = cutPictureBox.boxHeight;
				if(( event.localX >= tempX/2) &&  (event.localX+tempX/2 <= picture.width))
					cutPictureBox.x = picture.x + event.localX - tempX/2;
				if(event.localY >= tempY/2 &&  (event.localY+tempY/2 <= picture.height))
					cutPictureBox.y = picture.y + event.localY- tempY/2;
				
				cutPicture();
			}


			protected function picture_updateCompleteHandler(event:FlexEvent):void
			{
				var temp:Number = picture.width;
				if(0 == temp)
					return ;
				if(picture.width < 65 || picture.height<65)
				{
					cutPictureBox.visible =false;
					preImg.source = file.data;
					
					picture.x = (imgCanvas.width-preImg.width)/2;
					picture.y = (imgCanvas.height-preImg.height)/2;
					
					picture.doubleClickEnabled= false;
					picture.removeEventListener(MouseEvent.MOUSE_DOWN,picture_mouseDownHandler);
					picture.removeEventListener(MouseEvent.MOUSE_MOVE,picture_mouseMoveHandler);
					picture.removeEventListener(MouseEvent.DOUBLE_CLICK,picture_doubleClickHandler);
					picture.removeEventListener(MouseEvent.MOUSE_UP,picture_mouseUpHandler);
					return ;
				}else
				{
					picture.doubleClickEnabled=true;
					picture.addEventListener(MouseEvent.MOUSE_DOWN,picture_mouseDownHandler);
					picture.addEventListener(MouseEvent.MOUSE_MOVE,picture_mouseMoveHandler);
					picture.addEventListener(MouseEvent.DOUBLE_CLICK,picture_doubleClickHandler);
					picture.addEventListener(MouseEvent.MOUSE_UP,picture_mouseUpHandler);
					
				}
				cutPictureBox.visible =true;
			}

		]]>
		</mx:Script>

		<mx:HBox height="100%" width="100%" >
			<mx:VBox  height="100%" width="100%" verticalAlign="middle" horizontalAlign="center">
				<!--<components:ScaleLabels id="scale"/>-->
				<mx:Canvas width="256" height="256" left="10" id="imgCanvas" top="40" borderThickness="1" borderStyle="solid" horizontalScrollPolicy="off" verticalScrollPolicy="off">
					<mx:Image id="picture" 
							  smoothBitmapContent="true" updateComplete="picture_updateCompleteHandler(event)"
							  complete="picture_completeHandler(event)"
							  ioError="picture_ioErrorHandler(event)"/>
					<components:ScaleBox id="cutPictureBox"
										 cutObject="{picture}" visible="false"
										 boxWidth="64" boxHeight="64"
 										 cut="cutPicture()" x="64" y="55"/>
				</mx:Canvas>
			</mx:VBox>
			<mx:VBox  height="100%" width="120" verticalAlign="middle" horizontalAlign="center">
				<mx:VBox height="256" width="100" verticalAlign="middle" horizontalAlign="center" verticalGap="15" borderStyle="solid" borderThickness="1"
						 paddingBottom="8" paddingTop="8" paddingRight="8">
					<!--<mx:Label text="图片大小在64*64显示效果最佳" />-->
					<mx:Label text="图像预览:" />
					<mx:Canvas width="64" height="64" borderThickness="1" borderStyle="solid">
						<mx:Image id="preImg" width="100%" height="100%"/>
					</mx:Canvas>
					<mx:Label text="64×64" />
					<mx:Button id="loadBtn" click="upload();" label="本地上传"/>
				</mx:VBox>
			</mx:VBox>
			
		</mx:HBox>
		<mx:ControlBar horizontalAlign="right">
			<mx:Button label="确定" click="save();" id="confimBtn"/>
			<mx:Button label="关闭" click="titlewindow1_closeHandler(null)"/>
		</mx:ControlBar>
</mx:TitleWindow>