# AbstractSelectionModel.js

    /**
     @class Ext.grid.AbstractSelectionModel
     @extends Ext.util.Observable
     @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();
        },

        /**
         * Lock the selections
         */
        lock : function(){
            this.locked = true;
        },

        /**
         * Unlock the selections
         */
        unlock : function(){
            this.locked = false;
        },

        /**
         * Returns true if the selections are locked
         * @return {Boolean}
         */
        isLocked : function(){
            return this.locked;
        }
    });

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