flash绘图api实现点选线
package lib{import flash.display.Sprite;import flash.events.Event;import flash.events.MouseEvent;import flash.filters.GlowFilter;import flash.geom.Point;public class PointSelectLine extends Sprite{private var shape:Sprite;private var color:uint;private var startPoint:Point;public function PointSelectLine(){addEventListener(Event.ADDED_TO_STAGE,init);}private function init(e:Event):void{stage.addEventListener(MouseEvent.MOUSE_UP,onUp);stage.addEventListener(MouseEvent.MOUSE_DOWN,onDown);}private function onUp(e:MouseEvent):void{stage.removeEventListener(MouseEvent.MOUSE_MOVE,onMove);}private function onDown(e:MouseEvent):void{startPoint = new Point(stage.mouseX,stage.mouseY);color = Math.random() * 0xffffff;initShape();stage.addEventListener(MouseEvent.MOUSE_MOVE,onMove);}private function onMove(e:MouseEvent):void{shape.graphics.clear();shape.graphics.lineStyle(3,color);shape.graphics.moveTo(startPoint.x,startPoint.y);shape.graphics.lineTo(stage.mouseX,stage.mouseY);}private function initShape():void{shape = new Sprite();addChild(shape);shape.addEventListener(MouseEvent.CLICK,onClick);}private function onClick(e:MouseEvent):void{if(e.target.filters.length==0){e.target.filters = [new GlowFilter()];}else{e.target.filters = [];}}}}