Grid inside Tab - extjs

Question

I'm trying to put a Grid (Ext.grid.GridPanel) object inside a Tab .
This is the code:
var grid = new Ext.grid.GridPanel({
store: new Ext.data.Store({
autoDestroy: true,
reader: reader,
data: xg.dummyData
}),
colModel: new Ext.grid.ColumnModel({
defaults: {
width: 120,
sortable: true
},
columns: [
{id: 'company', header: 'Company', width: 200, sortable: true, dataIndex: 'company'},
{header: 'Price', renderer: Ext.util.Format.usMoney, dataIndex: 'price'},
{header: 'Change', dataIndex: 'change'},
{header: '% Change', dataIndex: 'pctChange'},
// instead of specifying renderer: Ext.util.Format.dateRenderer('m/d/Y') use xtype
{
header: 'Last Updated', width: 135, dataIndex: 'lastChange',
xtype: 'datecolumn', format: 'M d, Y'
}
]
}),
sm: new Ext.grid.RowSelectionModel({singleSelect:true}),
width: 600,
height: 300,
frame: true,
title: 'Framed with Row Selection and Horizontal Scrolling',
iconCls: 'icon-grid'
});
this.tabs = new Ext.TabPanel({
fullscreen: true,
type: 'dark',
sortable: true,
dockedItems: [
{
xtype:'toolbar',
title:'Hello World'
}],
tabBar: {
ui: 'light',
layout: {
pack: 'left'
}
},
items: [
{
cls:'hello',
id:'tab1',
html : '<a>hello</a>',
title:'Monitor'
}, {
cls:'world',
id:'tab2',
xtype: 'map',
html : '<a>hello world</a>',
title:'Map'
}, {
cls:'world',
id:'tab3',
html : '<a>hello world</a>',
dockedItems:grid
}]
});
When I load the page there's no error, but the grid is not shown.

Answer 1

The grid is not a docked item (that's for toolbars and other things that should stick to one side of a container). If you want the grid to take up the entire tab, just add it directly as an item to the TabPanel and it will become the full tab:
items: [
{
cls:'hello',
id:'tab1',
html : '<a>hello</a>',
title:'Monitor'
}, {
cls:'world',
id:'tab2',
xtype: 'map',
html : '<a>hello world</a>',
title:'Map'
},
grid ]