Ext Js4.2 tree grid editing

그리드 수정

HTML

<link rel="stylesheet" href="http://cdn.sencha.io/ext-4.2.0-gpl/resources/css/ext-all.css">
<div id="dataArea"></div>

JavaScript

Ext.require(['*']);
Ext.onReady(function () {
    var data = [{
        "children": [{
            "children": [],
            "treeName": "회선설비임대재판매및통신서비스모집, 중개서비스",
            "leaf": true,
            "expanded": false
        }, {
            "2013,00206,00006": 123.0,
            "2013,00206,00004": 123.0,
            "children": [],
            "treeName": "유선통신서비스",
            "leaf": true,
            "expanded": false
        }, {
            "children": [],
            "treeName": "부가통신서비스",
            "leaf": true,
            "expanded": false
        }],
        "treeName": "통신서비스",
        "leaf": false,
        "expanded": true
    }, {
        "children": [{
            "children": [],
            "treeName": "부품",
            "leaf": true,
            "expanded": false
        }, {
            "children": [],
            "treeName": "방송기기",
            "2013,00206,00008": 22.0,
            "leaf": true,
            "expanded": false
        }, {
            "2013,00206,00007": 123.0,
            "children": [],
            "treeName": "통신기기",
            "leaf": true,
            "expanded": false
        }, {
            "children": [],
            "treeName": "정보기기",
            "leaf": true,
            "expanded": false
        }],
        "treeName": "ICT기기",
        "leaf": false,
        "expanded": true
    }];

    var store = Ext.create('Ext.data.TreeStore', {
        fields: ['treeName',
            '2013,00206,00004',
            '2013,00206,00006',
            '2013,00206,00007',
            '2013,00206,00008',
            '2013,00206,00009'

        ],
        proxy: {
            data: data,
            type: 'memory',
            reader: {
                type: 'json'
            }
        },
        autoLoad: false
    });

    var tree = Ext.create('Ext.tree.Panel', {
        id: "gridTree",
        autoHeight: true,
        renderTo: Ext.get('dataArea'),
        useArrows: false,
        rootVisible: false,
        store:...