新手问：ext4 livegrid中checkbox怎么获取值

新手问：ext4 livegrid中checkbox如何获取值 - Web 开发 / Ajax
使用它的http://dev.sencha.com/deploy/ext-4.0.2a/examples/grid/infinite-scroll.html例子加checkbox后如何取值和赋值？

JScript code

Ext.Loader.setConfig({enabled: true});Ext.Loader.setPath('Ext.ux', 'js/ext-4.0.0/examples/ux/');Ext.require([    'Ext.grid.*',    'Ext.data.*',    'Ext.util.*',    'Ext.grid.PagingScroller',    'Ext.ux.RowExpander',    'Ext.selection.CheckboxModel'    ]);var rec = "";Ext.onReady(function(){    Ext.define('ForumThread', {        extend: 'Ext.data.Model',        fields: [            'title', 'forumtitle', 'forumid', 'author',            {name: 'replycount', type: 'int'},            {name: 'lastpost', mapping: 'lastpost', type: 'date', dateFormat: 'timestamp'},            'lastposter', 'excerpt', 'threadid'        ],        idProperty: 'threadid'    });    // create the Data Store     //var sm = Ext.create('Ext.selection.CheckboxModel');        var store = Ext.create('Ext.data.Store', {        id: 'store',        pageSize: 200,        model: 'ForumThread',        remoteSort: true,        buffered: true,        proxy: {            type: 'jsonp',            url: 'http://www.sencha.com/forum/remote_topics/index.php',            extraParams: {                total: 50000            },            reader: {                root: 'topics',                totalProperty: 'totalCount'            },            simpleSortMode: true        },        sorters: [{            property: 'lastpost',            direction: 'DESC'        }]    });    function renderTopic(value, p, record) {        return Ext.String.format(            '<a href="http://sencha.com/forum/showthread.php?t={2}" target="_blank">{0}</a>',            value,            record.data.forumtitle,            record.getId(),            record.data.forumid        );    }    var sm = Ext.create('Ext.selection.CheckboxModel');         var grid = Ext.create('Ext.grid.Panel', {        width: 700,        height: 500,        id:'xxgrid',        title: 'checkbox',        store: store,        selModel: sm,        selModel : new Ext.selection.CheckboxModel({singleSelect : false}),        frame: true,        verticalScrollerType: 'paginggridscroller',        loadMask: true,        disableSelection: false,        invalidateScrollerOnRefresh: false,        viewConfig: {        trackOver: false        },        // grid columns        columns:[        {            id: 'topic',            text: "Topic",            dataIndex: 'title',            flex: 1,            renderer: renderTopic,            sortable: false        },{            text: "Author",            dataIndex: 'author',            width: 100,            hidden: true,            sortable: true        },{            text: "Replies",            dataIndex: 'replycount',            align: 'center',            width: 70,            sortable: false        },{            id: 'last',            text: "Last Post",            dataIndex: 'lastpost',            width: 130,            renderer: Ext.util.Format.dateRenderer('n/j/Y g:i A'),            sortable: true        }],        renderTo: 'grid-example'    });       // trigger the data store load    store.guaranteeRange(0, 199);    });    function chkVal(){        var selChk;        rec = Ext.getCmp('xxgrid').getSelectionModel().getSelection();        //alert(rec.get['Replies']);        for (var i = 0; i < rec.length; i++) {            selChk += rec[i].get("last")            if (i < rec.length - 1) {                selChk = selChk + ",";                }        }        alert(selChk);        } 

3、boolean值 false不触发选中事件 否则触发

Ext.getCmp('xxgrid').getSelectionModel().select(参数传入);
[解决办法]
caseSensitiveToggle: function(checkbox, checked) {
this.caseSensitive = checked;
this.onTextFieldChange();
},
如果选中引发:onTextFieldChange事件的

[解决办法]
this.caseSensitive = checked;
这个变量可以获取,示例里有的