Ext.define('Ext.rtl.grid.NavigationModel', { override: 'Ext.grid.NavigationModel', initKeyNav: function(view) { var me = this, proto = me.self.prototype; if (view.getInherited().rtl) { me.onKeyLeft = proto.onKeyRight; me.onKeyRight = proto.onKeyLeft; } me.callParent([view]); }});