upgraded yui to 2.2.2 and yui-ext to 1.0.1a

www/extras/yui-ext/source/widgets/grid/AbstractSelectionModel.js

@@ -0,0 +1,47 @@
+/*
+ * Ext JS Library 1.0.1
+ * Copyright(c) 2006-2007, Ext JS, LLC.
+ * licensing@extjs.com
+ * 
+ * http://www.extjs.com/license
+ */
+
+/**
+ @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;    
+    }
+});