extjs 事件监听 三种方式详解编程语言

xtype : 'textarea',   
name : 'dataSetField',   
labelSeparator:'',   
fieldLabel:'',   
hideLabel: true,   
allowBlank: true,   
height: mainPanelHeight*0.8,   
anchor:'99%',   
listeners:{'blur':function(){   
   alert(1);   
}}

gridPanel.on('rowdblclick',function(gridPanel,_rowIndex,e){   
  alert(2);   
} 

gridPanel.addListener('rowclick',function(){   
 alert(3)}   
);