ExtJs4.1:新建一个GridPanel并在弹出窗口中显示

var grid = Ext.create('Ext.grid.Panel', {
border: false,
store: store,
columns: createColumns(4),
loadMask: true,
features: [filters],
dockedItems: [Ext.create('Ext.toolbar.Paging', {
dock: 'bottom',
store: store
})],
emptyText: 'No Matching Records'
});

var win = Ext.create('Ext.Window', {
title: 'Grid Filters Example',
height: 400,
width: 700,
layout: 'fit',
items: grid
}).show();