ProductGridPanel 那个rowselect的事件那样用会照成死循环吗

见一下代码 那个rowselect的事件那样用会照成死循环吗

/********创建FormPanel*******/
ProductFormPanel = Ext.extend(Ext.form.FormPanel,{
	constructor:function(){

ProductFormPanel.superclass.constructor.call(this,

{

labelWidth:45,

defaultType:'textfield',

defaults:{anchor:'90%'},

baseCls:'x-plain',

items:[

{fieldLabel:'姓名',name:'name'},

{fieldLabel:'年龄',name:'age'},

{

fieldLabel:'性别',

hiddenName:'sex',

xtype:'combo',

mode:'local',

displayField:'sex',

readOnly:true,

triggerAction:'all',

value:'男',

store:new Ext.data.SimpleStore({

fields:['sex'],

data:[['男'],['女']]

})

}

]

})
	},
	reset:function(){

this.getForm().reset();
	},
	getValue:function(){

if(this.getForm().isValid()){

return new Ext.data.Record(this.getForm().getValues());

}else{

throw Error('表单未能通过！');

}
	},
	setValue:function(_r){

this.getForm().loadRecord(_r);

	}
});
/*******创建Windows*********/
ProductWindows = Ext.extend(Ext.Window,{
	form: new ProductFormPanel(),
	constructor:function(){

this.form = new ProductFormPanel();

ProductWindows.superclass.constructor.call(this,

{

plain:true,

width:300,

modal:true,

items:this.form,

closeAction:'hide',

buttons:[

{

text:'确定',

handler:this.onSubmitClick,

scope:this

},

{

text:'取消',

handler:this.onCancelClick,

scope:this

}]

}

);

this.addEvents('submit');
	},
	close:function(){

this.form.reset();

this.hide();
	},
	onCancelClick:function(){

this.close();
	},
	onSubmitClick:function(){

try{


this.fireEvent('submit',this,this.form.getValue());

this.close();

}catch(_err){

return;

}
	}
});
/*******创建InsertWin*******/
InsertProductWin = Ext.extend(ProductWindows,{
	title:'添加产品'
});
/*******创建UpdateWin*******/
UpdateProductWin = Ext.extend(ProductWindows,{
	load:function(_r){this.form.setValue(_r);},
	title:'修改产品'
});
/*******创建GridPanel*******/
var data = [{name:'张三',sex:'男',age:18},{name:'李四',sex:'女',age:20}];
var store = new Ext.data.JsonStore({
	data:data,
	autoLoad:true,
	fields:['name','age','sex']
});
var cm = new Ext.grid.ColumnModel([
{dataIndex:'name',header:'姓名',sortable:true},
{dataIndex:'sex',header:'性别',sortable:true},
{dataIndex:'age',header:'年龄',sortable:true}
]);
ProductGridPanel = Ext.extend(Ext.grid.GridPanel,{
	insertwin:new InsertProductWin(),
	updatewin:new UpdateProductWin(),
	constructor:function(){

ProductGridPanel.superclass.constructor.call(this,{

cm:cm,

region:'center',

height:300,

store:store,

border:false,
//这个地方这样用是死循环了吗

sm:new Ext.grid.RowSelectionModel({

singleSelect:true,

listeners:{

'rowselect':{

fn:function(_sel,_index,_r){this.fireEvent('rowselect',_r)},

scope:this

}

}

}),

title:'测试',

tbar:[

{

text:'添加记录',

handler:function(){this.insertwin.show();},

scope:this

},

'-',

{

text:'修改记录',

handler:function(){
//
this.updatewin.show();
//
var r = this.getSelected();

try{

this.updatewin.show();

this.updatewin.load(this.getSelected());

}catch(_err){

alert(_err.description);

}

},

scope:this

}]

}),

this.insertwin.on('submit',this.onInsertWinSubmit,this);

this.addEvents('rowselect');
	},
	getSelected:function(){

var _sm = this.getSelectionModel();

if(_sm.getCount()==0)

{

throw Error('请选择一条记录！');

}

return _sm.getSelected();

},
	onRowSelect:function(_sel,_index,_r){

this.fireEvent('rowselect',_r);

},
	insert:function(_r){

alert(Ext.util.JSON.encode(_r));


this.getStore().add(_r);

},
	onInsertWinSubmit:function(_win,_r){


this.insert(_r);
	}
});


Ext.onReady(function(){
	var grid = new ProductGridPanel();
	var view = new Ext.Viewport({

renderTo:Ext.getBody(),

items:[grid]
	});
});

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