マウスイベントのフローで混乱するのでおさらい

/**
 * Copyright mi77 ( http://wonderfl.net/user/mi77 )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/n2P0
 */

/*

  いまだにマウスイベントのフローで混乱するのでおさらい
  とりあえずMouseEvent.stopPropagation()するかしないかで工夫すればよい？
  それじゃあカバーできないケースもありそう。。。
  
  //参考: ActionScript 3.0 のプログラミング > イベントの処理 > イベントフロー 
　http://livedocs.adobe.com/flash/9.0_jp/main/wwhelp/wwhimpl/common/html/wwhelp.htm?context=LiveDocs_Parts&file=00000137.html#wp777600
    
  //参考: stopPropagation()とstopImmediatePropagation()
  http://www.nankaifactory.com/blog/2008/06/stoppropagationstopimmediatepr.html

*/

package {
////////////////////////////////////////////////////
import flash.display.*;
import flash.events.*;
import flash.text.*;

public class FlashTest extends Sprite
{
    private var _txt:TextField;
    private var _txt2:TextField;
    
    public function FlashTest() 
    {
        var sq0:Square = new Square(0x666666, 150);
        addChild(sq0);
        sq0.x=sq0.y=150;
        sq0.name = "親";
        //
        var sq1:Square = new Square(0x000000, 50);
        sq0.addChild(sq1);
        sq1.x=sq1.y=50;
        sq1.buttonMode=true;
        sq1.name = "子";
        //
        _txt = new TextField();
        addChild(_txt);
        _txt.height = 20;
        _txt.width = 500;;
        _txt.x = 10;
        _txt.y = 10;
        //
        _txt2 = new TextField();
        addChild(_txt2);
        _txt2.height = 20;
        _txt2.width = 500;
        _txt2.x = 10;
        _txt2.y = 30
        //
        sq0.addEventListener(MouseEvent.MOUSE_OUT, mouseOutH);
        sq0.addEventListener(MouseEvent.MOUSE_OVER, mouseOverH);
        //
        sq1.addEventListener(MouseEvent.MOUSE_OUT, mouseOutChildH);
        sq1.addEventListener(MouseEvent.MOUSE_OVER, mouseOverChildH);
        sq1.addEventListener(MouseEvent.CLICK, mouseClickChildH);
    }
    
    private function mouseOutH(e:MouseEvent):void
    {
        e.stopPropagation();
        _txt.text =　e.currentTarget.name + " OUT ";
    }
    
    private function mouseOverH(e:MouseEvent):void
    {
        e.stopPropagation();
        _txt.text =　e.currentTarget.name + " OVER ";
    }
    
     private function mouseOutChildH(e:MouseEvent):void
    {
        _txt2.text =　e.currentTarget.name + " OUT ";
    }
    
    private function mouseOverChildH(e:MouseEvent):void
    {
        _txt2.text =　e.currentTarget.name + " OVER ";
    }
    
    private function mouseClickChildH(e:MouseEvent):void
    {
        _txt2.text =　e.currentTarget.name + " CLICK";
    }
}
////////////////////////////////////////////////////
}


import flash.display.*;
internal class Square extends Sprite
{
   public function Square(color:int, size:int)
   {
      graphics.beginFill(color);
      graphics.drawRect(0, 0, size, size);
   }
}