deepTrace for flash9/10

deepTrace any displayObject, and add optional fields to trace
deepTrace will trace the object and all it's children.

import flash.display.DisplayObject;
import flash.display.DisplayObjectContainer;
import flash.Error;

public static function deepTrace( obj:DisplayObject, ?fields:Array<String>, level:Int = 0 ):Void
{
    var tabs:String = "";
    var i:Int = 0;
    var l:Int = level;
    for ( i in 0...l){
        tabs += "\t";
    }

    var printData = function(newField, fieldString)
    {
        return fieldString + (fieldString != "" ? "; " : "") +newField+ " : " +Reflect.field(obj, newField);
    }
    if(fields != null && fields.length > 0){
        try{
            trace(tabs + obj + " -> ( " + Lambda.fold(fields, printData, "") + " )");
        }catch(e:Error){
            trace(tabs + obj + " -> ( has no fields ["+fields+"] )");
        }
    }
    
    if(Std.is(obj,DisplayObjectContainer)){
        for ( i in 0...Reflect.field(obj, "numChildren") ){
            deepTrace( Reflect.field(obj, "getChildAt")(i), fields, level + 1 );
        }
    }
}

deepTrace(myObject,["x","y"]);
will trace something like

[object myObject] -> ( x : 560; y : 150 )
    [object MovieClip] -> ( x : 0; y : -50 )
        [object Shape] -> ( x : 0; y : 0 )
        [object Shape] -> ( x : 0; y : 0 )
        [object Sprite] -> ( x : 200; y : 100 )
    [object Sprite] -> ( x : 100 ; y : 300 )
        [object SimpleButton] -> ( x : -10 ; y : 100 )
        [object TextField] -> ( x : -40 ; y : -30 )
    [object Sprite] -> ( x : 300 ; y : 300 )
        [object SimpleButton] -> ( x : -10 ; y : 100 )
        [object TextField] -> ( x : -40 ; y : -30 )
    [object Sprite] -> ( x : 200 ; y : 300 )
        [object CustomButton] -> ( x : -37 ; y : 100 )
            [object Shape] -> ( x : 0; y : 0 )
            [object TextField] -> ( x : 0 ; y : 0 )