text: /*
   * Ext JS Library 2.0.2
   * Copyright(c) 2006-2008, Ext JS, LLC.
   * licensing@extjs.com
   * 
   * http://extjs.com/license
   */
  
  /**
   * @class Ext.grid.AbstractSelectionModel
   * @extends Ext.util.Observable
   * Abstract base class for grid SelectionModels.  It provides the interface that should be
   * implemented by descendant classes.  This class should not be directly instantiated.
   * @constructor
   */
  Ext.grid.AbstractSelectionModel = function(){
      this.locked = false;
      Ext.grid.AbstractSelectionModel.superclass.constructor.call(this);
  };
  
  Ext.extend(Ext.grid.AbstractSelectionModel, Ext.util.Observable,  {
      /** @ignore Called by the grid automatically. Do not call directly. */
      init : function(grid){
          this.grid = grid;
          this.initEvents();
      },
  
      /**
       * Locks the selections.
       */
      lock : function(){
          this.locked = true;
      },
  
      /**
       * Unlocks the selections.
       */
      unlock : function(){
          this.locked = false;
      },
  
      /**
       * Returns true if the selections are locked.
       * @return {Boolean}
       */
      isLocked : function(){
          return this.locked;
      }
  });