Ext.Viewport用TabPanel中GridPanel布局问题

Ext.Viewport用了TabPanel

        {
                region:'center',
                layout:'fit',
                split:true,
                collapsible: true,
                margins:'0 0 0 0',
                frame:true,
                items:tabPanel
            }

 
Ext.TabPanel里建立一个新的Ext.TabPanel,包含GridPanel

var tabPanel = new Ext.TabPanel({
            id:'tabPanel',
            region:'center',
            deferredRender:false,
            activeTab:0,
            enableTabScroll:true,
            defaults: {autoScroll:true},
            items:[{
                contentEl:'center_context_desktop',
                title: '桌面',
                autoScroll:true
            }]
        });

 
这里,试过好多方法,都无法把grid设置为自适应宽度,快发疯了.

tabPanel.add({
                id: 'user_list_grid',
                title: '用户列表',
                iconCls: 'userIco',
                closable:true,
                items:grid
                   
            })

刚通过以下方式试成功了.

使用这位仁兄的方法成功了.分享给大家

var grid = new Ext.grid.GridPanel({
		//autoWidth:true,
        border:false,
		width: Ext.get('center_context_desktop').getWidth(), 
        ds: new Ext.data.Store({
            reader: new Ext.data.ArrayReader({}, [
               {name: 'company'},
               {name: 'price', type: 'float'},
               {name: 'change', type: 'float'},
               {name: 'pctChange', type: 'float'},
               {name: 'lastChange', type: 'date', dateFormat: 'n/j h:ia'}
            ]),
            data: Ext.grid.dummyData
        }),
        cm: new Ext.grid.ColumnModel([
            new Ext.grid.RowNumberer(),
            {id:'company',header: "Company", width: 120, sortable: true, dataIndex: 'company'},
            {header: "Price", width: 70, sortable: true, renderer: Ext.util.Format.usMoney, dataIndex: 'price'},
            {header: "Change", width: 70, sortable: true, dataIndex: 'change'},
            {header: "% Change", width: 70, sortable: true, dataIndex: 'pctChange'},
            {header: "Last Updated", width: 95, sortable: true, renderer: Ext.util.Format.dateRenderer('m/d/Y'), dataIndex: 'lastChange'}
        ]),

        viewConfig: {
            forceFit:true
        },
        autoExpandColumn:'company'
    });
//autoWidth:true,
这一行一定要隐藏,在ie7和ff下试了,是没有问题的.
同时还有bodyStyle:'width:100%',这个也试成功了