 import flash.events.MouseEvent;
 import flash.geom.Point;
 import flash.geom.Rectangle;
+import flash.utils.Dictionary;
 
 import mx.collections.ArrayList;
 import mx.collections.IList;

    
    /**
     *  If true then a dataTip is displayed for all visible cells.  If false (the default),
     *  then a dataTip is only displayed if the column's showDataTip property is true.
     * 
     *  @default false
     *  

     */
    private var generatedColumns:Boolean = false;
    
    //--------------------------------------------------------------------------
    //
    //  Constructor
