 import flashx.tcal.operations.FlowOperation;
 import flashx.tcal.operations.SplitParagraphOperation;
 
-import flex.events.TextOperationEvent;
-import flex.intf.IViewport;
-import flex.utils.TextUtil;
+import mx.events.TextOperationEvent;
+import mx.core.IViewport;
+import mx.utils.TextUtil;
 
 import mx.core.UIComponent;
 import mx.events.FlexEvent;

    }
    
    /**
     * @copy flex.layout.LayoutBase#horizontalScrollPositionDelta
     */
    public function verticalScrollPositionDelta(unit:uint):Number
    {

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

    /**
     * @copy mx.layout.LayoutBase#horizontalScrollPositionDelta
     */
    public function horizontalScrollPositionDelta(unit:uint):Number
    {
