Class extending MovieClip has innacurate this.x/this.y values

Question

I would love if someone could take a look at the code below.  When you do, you'll see that the movieclip should obviously be at position (0, 0) on the stage.  However it appears at (25, 5)!  if I leave in the original "this.x = xx;", then it appears at (50, 5).  If I also leave in "this.y=yy;" then it appears at (50, 10).
Any ideas what's happening?  I feel like I'm doing something extremely dumb.
Thanks!
// actionscript in frame 1:
     var button:Btn = new Btn(showUpgrade, 25, 5, "Show", true, 5);
     addChild(button);
     trace(button.x.toString()); // prints 0
// Btn class
package  {
     // imports here
public class Btn extends MovieClip {
             // global vars here
     public function Btn(cback:Function=null, xx:Number=0, yy:Number=0,  lbl:String="Button", manualButton:Boolean=false, wdth:Number=0,  hght:Number=0) {
              trace(this.x.toString());  // prints 0
         this.x = 0;
              trace(this.x.toString());  // prints 0
         this.y = 0;
             // other irrelevant code below

Answer 1

Hi,
In your button class you're tracing values before they are set - so it prints defaults which have value of 0 I think.
If you trace values after they are assigned you should have different readings, see:
package
     import flash.display.MovieClip;
     public class MyButton extends MovieClip
          public function MyButton(callback:Function=null,
                                             xValue:int=0,
                                             yValue:int=0,
                                             label:String="Button",
                                             isManual:Boolean=false,
                                             widthValue:Number=0,
                                             heightValue:Number=0)
               super();
               trace(this.x+":"+this.y);
               this.x = xValue;
               this.y = yValue;
               trace(this.x+":"+this.y);
var btn:MyButton = new MyButton(showUpgrade, 25, 5, "Show", true, 5);
addChild(btn);
trace("btn.x:"+btn.x+":btn.y:"+btn.y);
at least for me it traces:
0:0
25:5
btn.x:25:btn.y:5
the first 0:0 is expected as they are traced in constructor before assigning new values (and before object is added to stage btw),
regards,
Peter