      * 
      *  This method is intended to be used by subclass updateDisplayList() 
      *  methods to sync the columnCount property with the actual number
-     *  of visible columns.
+     *  of columns in view.
      *
-     *  @param value The number of visible columns.
+     *  @param value The number of columns in view.
      *  
      *  @langversion 3.0
      *  @playerversion Flash 10

    [Inspectable(category="General")]

    /**
     *  Returns the current number of visible elements.
     * 
     *  @default -1
     *  

        if (!layoutTarget)
            return;

        if ((layoutTarget.numElements == 0) || (unscaledWidth == 0) || (unscaledHeight == 0))
        {
            setColumnCount(0);
            setIndexInView(-1, -1);
            if (layoutTarget.numElements == 0)
                layoutTarget.setContentSize(0, 0);
            return;         
        }

        if (useVirtualLayout) 
            updateDisplayListVirtual();
        else
            updateDisplayListReal();
