extjs 事件监听 三种方式
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)} );