extjs4.0——window

Ext.create('Ext.window.Window', {    title: 'Hello',    height: 200,    width: 400,    layout: 'fit',    items: {  // Let's put an empty grid in just to illustrate fit layout        xtype: 'grid',        border: false,        columns: [{header: 'World'}],                 // One header just for show. There's no data,        store: Ext.create('Ext.data.ArrayStore', {}) // A dummy empty data store    }}).show();

其实他是继承了panel的属性，所有用法跟panel几乎差不多。