Extjs标悬浮在grid单元格上时，显示单元格中内容的值

{

xtype: 'gridcolumn',

text : '名称',

width : 120,

dataIndex : 'name',

editor : {

xtype : 'textfield',

allowBlank : false,

maxLength : 20

},

renderer : function(v,m,r,i){

var value = '';

if(v){

m.tdAttr = 'data-qtip="'+v+'"';

var reg = /^[\u4e00-\u9fa5]+$/;

if(reg.exec(v)){

if(v.length > 7){

v = v.substring(0,7);

}

}else{

if(v.length > 14){

v = v.substring(0,14);

}

}

value = '<div>' + v + '<img align="right" onclick="alert(\'a\')" src="'+contentPath+'/shinow/analysis/view/css/images/spot.png"></img>' + '<div>'

}else{

value = '<div>' + '请输入名称' + '<img align="right" onclick="alert(\'a\')" src="'+contentPath+'/shinow/analysis/view/css/images/spot.png"></img>' + '<div>'

}

return value;

}

}