[ExtJs] - Auto Width in Panel of Grid

" layout:'fit' "



upPanel = new Ext.Panel({
title:'Device List',
region:'center',
collapsible:false,
reload:true,
width:400,
height:200,
minSize: 100,
autoScroll:true,
bodyStyle:'background-color: white',
items: [this.gridEam()],
layout:'fit'
});