[flexcoders] Custom Component not visible on stage

[droponrcll]

I have created a custom AS component "DragObject" based on Canvas.  
The idea is that ultimately users will be able to put whatever they 
want inside this ontainer and it will handle most of the code of drag 
and drop for them.


However, when I put another (100 x 100) Canvas inside this component 
just to test it out, the width and height of my component are 0, so 
it doesn't show up on stage.  I used the super() method in my 
constructor, so I expected my component to behave like a Canvas in 
that it should automatically be sized around its children.

Here is the AS for my class:

package elearning
{
        import mx.containers.Canvas;

        public class DragObject extends Canvas
        {
                public function DragObject()
                {
                        super();
                }
                private var _desc:String = "Untitled Draggable 
Object";
                public function get desc():String{
                        return _desc;
                }
                public function set desc(descTxt:String):void{
                        _desc=descTxt;
                }
                override public function toString():String{
                        return("DragObject " + _desc);
                }
        }
}

Thanks!