     public function TrackBase():void
     {
         super();
+        addEventListener(MouseEvent.MOUSE_DOWN, mouseDownHandler);
     }
 
     //--------------------------------------------------------------------------

package spark.components.supportClasses
{

import flash.events.Event;
import flash.events.FocusEvent;
import flash.events.MouseEvent;
import flash.geom.Point;

import spark.components.Button;
import spark.events.TrackBaseEvent;

    //--------------------------------------------------------------------------

    private var tempTrackSize:Number = NaN;
	private var mouseDownTarget:DisplayObject;

    //--------------------------------------------------------------------------
    //
