 import flashx.textLayout.operations.SplitParagraphOperation;
 import flashx.textLayout.tlf_internal;
 
-import mx.core.IViewport;
-import mx.core.ScrollUnit;
+import spark.core.IViewport;
+import spark.core.ScrollUnit;
 import mx.core.UIComponent;
 import mx.core.mx_internal;
 import mx.events.FlexEvent;
-import mx.events.TextOperationEvent;
+import spark.events.TextOperationEvent;
 import mx.utils.StringUtil;
-import mx.utils.TextUtil;
+import spark.utils.TextUtil;
 
 //--------------------------------------
 //  Events

            }
        }
 
        // Dispatch a 'changing' event from the TextView
        // as notification that an editing operation is about to occur.
        if (dispatchChangingEvent)
        {

     *  Determines whether the user can enter multiline text.
     *  If <code>true</code>, the Enter key starts a new paragraph.
     *  If <code>false</code>, the Enter key doesn't affect the text
     *  but causes the RichEditableText to dispatch an <code>"enter"</code> event.
     * 
     *  @default true
     *  
