flash on 2013-7-2

/**
 * Copyright tepe ( http://wonderfl.net/user/tepe )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/nJFN
 */

package {
    import flash.text.TextField;
    import flash.events.*;
    import flash.display.*;
    public class FlashTest extends Sprite {
        private var mov:Number = 1;
        private var focusObj:Object;
        private var scrX:Number=0;
        private var scrY:Number=0;
        private var scrScale:Number = 1.0;
        private var scrRotate:Number = 0;
        private var field:Sprite = new Sprite();
        private var tf:TextField = new TextField();
        private var stack:Array = new Array();
        private var obj1:Sprite = new Sprite();
        private var obj2:Sprite = new Sprite();
        public function FlashTest() {
            // write as3 code here..
            graphics.beginFill(0xff0000);
            graphics.drawRect(0,0,400,400);
            graphics.endFill();
            stage.addEventListener(KeyboardEvent.KEY_DOWN,onKey);
            stage.addEventListener(Event.ENTER_FRAME,onFrame);
            addChild(field);
            with(field.graphics){
                lineStyle(1,0x00ff00);
                moveTo(-250,0);
                lineTo(250,0);
                moveTo(0,-250);
                lineTo(0,250);
            }
            stack.push(field);
            
            with(obj1){
                x = 150;
                y = 100;
                scaleX = scaleY = 0.3;
                rotation = 40;
                graphics.lineStyle(1,0x000000);
                graphics.drawCircle(0,0,30);
                graphics.moveTo(0,0);
                graphics.lineTo(50,0);
                
            }
            field.addChild(obj1);
           
            with(obj2){
                x = 150;
                y = 100;
                scaleX = scaleY = 0.3;
                rotation = 40;
                graphics.lineStyle(1,0x000000);
                graphics.drawCircle(0,0,30);
                graphics.moveTo(0,0);
                graphics.lineTo(50,0);
                
            }
            obj1.addChild(obj2);
            addChild(tf);
            focusObj = field;

            
            

            
        }
        
        private function changeParent(target:Sprite):void{
            
            var obj:Object = new Object();
            obj.x = target.x;
            obj.y = target.y;
            obj.scale = target.scaleX;
            obj.rotate = target.rotation;
            obj.target = target;
            stack.push(obj);    
            
            
            
            scrX += target.x;
            scrY += target.y;    
            scrX *= scrScale;
            scrY *= scrScale;
            target.x = 0;
            target.y = 0;
            
            scrScale *= target.scaleX;
            target.scaleX = target.scaleY = 1.0;
            focusObj = target;
            
        }
        
        private function changeParent2():void{
            //if(stack.lenght <= 2)return;
            var obj:Object = stack.pop();
            var target:Sprite = obj.target;
            scrScale /= obj.scale;
            target.scaleX = target.scaleY = obj.scale;
            
            scrX -= obj.x;
            scrY -= obj.y;
            target.x = obj.x;
            target.y = obj.y;
        }


        
        private function onFrame(e:Event):void{
            update();
        }

        
        private function update():void{
            field.x = scrX;
            field.y = scrY;
            field.scaleX = field.scaleY = scrScale;
            field.rotation = scrRotate;
        }

        
        private function onKey(e:KeyboardEvent):void{
            if(e.keyCode == 40){
                scrY -= mov;
            }
            else if(e.keyCode == 38){
                scrY += mov;
            }
            else if(e.keyCode == 39){
                scrX -= mov;
            }
            else if(e.keyCode == 37){
                scrX += mov;
            }
            
            if(e.keyCode == 13){
                changeParent(focusObj.getChildAt(0));
                tf.text = "onChange";
            }
            else if(e.keyCode == 8){
                changeParent2();
                tf.text = "onChange2";
            }






        }

    }
}