Flex 图片调整(Matrix 矩阵)（放大/放小/左旋转/右旋转/上移/下移/左移/右移/还原/调整 ...

转：http://blog.csdn.net/sjz168/article/details/6597623

很不错的例子，很好的讲解了Matrix的使用

<?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="initData();"    minWidth="955" minHeight="600"><s:layout><s:VerticalLayout/></s:layout><fx:Declarations><!-- 将非可视元素（例如服务、值对象）放在此处 --></fx:Declarations><fx:Script><![CDATA[//旋转初始值private var rotateDeg:Number=0;private function initData():void{}//旋转private function degreesToRadians(degrees:Number):Number { return (degrees * (Math.PI / 180)); } /** * 判断是左旋转还是有旋转 * */private function button_click(evt:Event):void {var direction:int;switch (evt.currentTarget) {case degreesUp:direction = +1;break;case degreesDown:direction = -1;break;}var radians:Number = degreesToRadians(direction);var offsetWidth:Number = image2.width / 2;var offsetHeight:Number = image2.height / 2;var tempMatrix:Matrix = image2.transform.matrix;tempMatrix.translate(-offsetWidth, -offsetHeight);tempMatrix.rotate(radians);tempMatrix.translate(+offsetWidth, +offsetHeight);image2.transform.matrix = tempMatrix;rotateDeg = image2.rotation;}//恢复原装private function resetImage():void { var tempMatrix:Matrix = image2.transform.matrix;tempMatrix.identity();image2.transform.matrix = tempMatrix;rotateDeg = image2.rotation;} //放大private function toBig():void{var tempMatrix:Matrix = image2.transform.matrix;tempMatrix.scale(1.1, 1.1);image2.transform.matrix = tempMatrix;rotateDeg = image2.rotation;}//缩小private function toSmall():void{var tempMatrix:Matrix = image2.transform.matrix;tempMatrix. scale(0.9, 0.9);image2.transform.matrix = tempMatrix;rotateDeg = image2.rotation;}//上下左右移动//上移private function toTop():void{var tempMatrix:Matrix = image2.transform.matrix;tempMatrix.translate(0,-10);image2.transform.matrix = tempMatrix;rotateDeg = image2.rotation;}//下移private function toDown():void{var tempMatrix:Matrix = image2.transform.matrix;tempMatrix.translate(0,10);image2.transform.matrix = tempMatrix;rotateDeg = image2.rotation;}//左移private function toLeft():void{var tempMatrix:Matrix = image2.transform.matrix;tempMatrix.translate(-10, 0);image2.transform.matrix = tempMatrix;rotateDeg = image2.rotation;}//右移private function toRight():void{var tempMatrix:Matrix = image2.transform.matrix;tempMatrix.translate(10, 0);image2.transform.matrix = tempMatrix;rotateDeg = image2.rotation;}//快照显示private function showImage3():void{var bd:BitmapData = new BitmapData(g3.width,g3.height);var m:Matrix = new Matrix();bd.draw(g3,m);image3.source=new Bitmap(bd);}]]></fx:Script><mx:HBox><s:Button label="+" autoRepeat="true" click="toBig();" buttonDown="toBig();"/><s:Button label="-" autoRepeat="true" click="toSmall();" buttonDown="toSmall();"/><s:Button label="↑" autoRepeat="true" click="toTop();" buttonDown="toTop();"/><s:Button label="←" autoRepeat="true" click="toLeft();" buttonDown="toLeft();"/><s:Button label="→" autoRepeat="true" click="toRight();" buttonDown="toRight();"/><s:Button label="↓" autoRepeat="true" click="toDown();" buttonDown="toDown();"/><s:Button label="左旋转" id="degreesUp" autoRepeat="true" click="button_click(event);"  buttonDown="button_click(event);" /><s:Button label="右旋转" id="degreesDown" autoRepeat="true" click="button_click(event);"  buttonDown="button_click(event);"/><s:Button label="Reset" click="resetImage();"/></mx:HBox><mx:Canvas id="g3" width="200" height="200" horizontalScrollPolicy="off" verticalScrollPolicy="off"><mx:Image id="image2"   source="assets/p4.jpg"   width="200"   scaleContent="true"   maintainAspectRatio="true"   height="200" /> </mx:Canvas><s:Button label="生成快照" click="showImage3();"/><mx:Image width="200" id="image3" height="200"  source="@Embed('assets/photo03.jpg')"/></s:Application>