About the relationship between viewport, Ext.panel and Ext.form.panel_extjs

Ext.panel can store many elements, the most common one is Ext.form.formPanel object, you can also use borderlayout layout
The following is a small example I wrote, the top container is not viewport but tabpanel

Copy code The code is as follows:

//An ordinary form
var frm = new Ext.form.FormPanel( {
defaultType: 'textfield',
labelAlign: 'right',
title: 'form1-center',
labelWidth: 50,
frame: true,
width: 120 ,
height:200,
region: 'center',
closable: true, //This attribute can control the closing of the from
items: [{
fieldLabel: 'text box'
}],
buttons: [{
text: 'Button'
}]
});
//Comrades, please note that region means borderlayout layout, in center Position
// Below I create a grid
// grid start
var cm = new Ext.grid.ColumnModel([
{ header: 'number', dataIndex: 'id' },
{ header: 'name', dataIndex: 'name' },
{ header: 'description', dataIndex: 'descn' }
]);
var data = [
[' 1', 'name1', 'descn1'],
['2', 'name2', 'descn2'],
['3', 'name3', 'descn3'],
[ '4', 'name4', 'descn4'],
['5', 'name5', 'descn5']
];
var ds = new Ext.data.Store({
proxy: new Ext.data.MemoryProxy(data),
reader: new Ext.data.ArrayReader({}, [
{ name: 'id' },
{ name: 'name' } ,
{ name: 'descn' }
])
});
ds.load();
var grid = new Ext.grid.GridPanel({
ds: ds,
cm: cm,
title: 'center-north',
region: 'north',
width:200,
height:200
});
// grid end
//Comrades, please note that region means borderlayout layout, at the north position
//Ext.panel can contain other panels
var fullForm = new Ext.Panel({
title: 'I am very good',
closable: true,
border: true,
layout: 'border',//Please pay attention to his layout
items: [grid, frm]
});