FLASH AS鼠标拖拽与旋转MC教程

package{
import flash.display .;
import flash.geom .Point;
import flash.events.;

public class main extends Sprite{
private var mc:MC;
private var clickOffset:Point;
private var mouseLoc:Point;

public function main(){
mc=new MC();
addChild(mc);
mc.x=200;
mc.y=200;
mc.addEventListener(MouseEvent.CLICK ,rot);
mc.addEventListener(MouseEvent.MOUSE_DOWN,startdrag);
mc.addEventListener(Event.ENTER_FRAME. ,drag);
stage.addEventListener(MouseEvent.MOUSE_UP,sdrag);
}
private function startdrag(e:MouseEvent ){
mouseLoc=new Point(e.stageX,e.stageY);
clickOffset=new Point(e.stageX-mc.x,e.stageY-mc.y);
}
private function drag(e:Event){
if(clickOffset==null) return;
mc.x=mouseX-clickOffset.x;
mc.y=mouseY-clickOffset.y;
}
private function sdrag(e:MouseEvent ){
clickOffset=null;
}
private function rot(e:MouseEvent){
if(!mouseLoc.equals(new Point(e.stageX,e.stageY)))return;
mc.rotation+=30;

}
}
}