 package spark.components.supportClasses
 {
 
+import flash.display.DisplayObject;
 import flash.events.Event;
 import flash.events.FocusEvent;
 import flash.events.MouseEvent;
 import flash.geom.Point;
+
+import mx.events.SandboxMouseEvent;
 
 import spark.components.Button;
 import spark.events.TrackBaseEvent;

    public function TrackBase():void
    {
        super();
    }

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

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

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

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