extjs利用treegrid实现下面的效果图

这是ext帮助文档上一个二级的希望对你有帮助
Ext.onReady(function() {
// wrapped in closure to prevent global vars.
Ext.define('Restaurant', {
extend: 'Ext.data.Model',
fields: ['name', 'cuisine']
});

var Restaurants = Ext.create('Ext.data.Store', {
storeId: 'restaraunts',
model: 'Restaurant',
sorters: ['cuisine','name'],
groupField: 'cuisine',
data: [{
name: 'Cheesecake Factory',
cuisine: 'American'
},{
name: 'University Cafe',
cuisine: 'American'
},{
name: 'Slider Bar',
cuisine: 'American'
},{
name: 'Shokolaat',
cuisine: 'American'
},{
name: 'Gordon Biersch',
cuisine: 'American'
},{
name: 'Crepevine',
cuisine: 'American'
},{
name: 'Creamery',
cuisine: 'American'
},{
name: 'Old Pro',
cuisine: 'American'
},{
name: 'Nola\'s',
cuisine: 'Cajun'
},{
name: 'House of Bagels',
cuisine: 'Bagels'
},{
name: 'The Prolific Oven',
cuisine: 'Sandwiches'
},{
name: 'La Strada',
cuisine: 'Italian'
},{
name: 'Buca di Beppo',
cuisine: 'Italian'
},{
name: 'Pasta?',
cuisine: 'Italian'
},{
name: 'Madame Tam',
cuisine: 'Asian'
},{
name: 'Sprout Cafe',
cuisine: 'Salad'
},{
name: 'Pluto\'s',
cuisine: 'Salad'
},{
name: 'Junoon',
cuisine: 'Indian'
},{
name: 'Bistro Maxine',
cuisine: 'French'
},{
name: 'Three Seasons',
cuisine: 'Vietnamese'
},{
name: 'Sancho\'s Taquira',
cuisine: 'Mexican'
},{
name: 'Reposado',
cuisine: 'Mexican'
},{
name: 'Siam Royal',
cuisine: 'Thai'
},{
name: 'Krung Siam',
cuisine: 'Thai'
},{
name: 'Thaiphoon',
cuisine: 'Thai'
},{
name: 'Tamarine',
cuisine: 'Vietnamese'
},{
name: 'Joya',
cuisine: 'Tapas'
},{
name: 'Jing Jing',
cuisine: 'Chinese'
},{
name: 'Patxi\'s Pizza',
cuisine: 'Pizza'
},{
name: 'Evvia Estiatorio',
cuisine: 'Mediterranean'
},{
name: 'Cafe 220',
cuisine: 'Mediterranean'
},{
name: 'Cafe Renaissance',
cuisine: 'Mediterranean'
},{
name: 'Kan Zeman',
cuisine: 'Mediterranean'
},{
name: 'Gyros-Gyros',
cuisine: 'Mediterranean'
},{
name: 'Mango Caribbean Cafe',
cuisine: 'Caribbean'
},{
name: 'Coconuts Caribbean Restaurant & Bar',
cuisine: 'Caribbean'
},{
name: 'Rose & Crown',
cuisine: 'English'
},{
name: 'Baklava',
cuisine: 'Mediterranean'
},{
name: 'Mandarin Gourmet',
cuisine: 'Chinese'
},{
name: 'Bangkok Cuisine',
cuisine: 'Thai'
},{
name: 'Darbar Indian Cuisine',
cuisine: 'Indian'
},{
name: 'Mantra',
cuisine: 'Indian'
},{
name: 'Janta',
cuisine: 'Indian'
},{
name: 'Hyderabad House',
cuisine: 'Indian'
},{
name: 'Starbucks',
cuisine: 'Coffee'
},{
name: 'Peet\'s Coffee',
cuisine: 'Coffee'
},{
name: 'Coupa Cafe',
cuisine: 'Coffee'
},{
name: 'Lytton Coffee Company',
cuisine: 'Coffee'
},{
name: 'Il Fornaio',
cuisine: 'Italian'
},{
name: 'Lavanda',
cuisine: 'Mediterranean'
},{
name: 'MacArthur Park',
cuisine: 'American'
},{
name: 'St Michael\'s Alley',
cuisine: 'Californian'
},{
name: 'Cafe Renzo',
cuisine: 'Italian'
},{
name: 'Osteria',
cuisine: 'Italian'
},{
name: 'Vero',
cuisine: 'Italian'
},{
name: 'Cafe Renzo',
cuisine: 'Italian'
},{
name: 'Miyake',
cuisine: 'Sushi'
},{
name: 'Sushi Tomo',
cuisine: 'Sushi'
},{
name: 'Kanpai',
cuisine: 'Sushi'
},{
name: 'Pizza My Heart',
cuisine: 'Pizza'
},{
name: 'New York Pizza',
cuisine: 'Pizza'
},{
name: 'California Pizza Kitchen',
cuisine: 'Pizza'
},{
name: 'Round Table',
cuisine: 'Pizza'
},{
name: 'Loving Hut',
cuisine: 'Vegan'
},{
name: 'Garden Fresh',
cuisine: 'Vegan'
},{
name: 'Cafe Epi',
cuisine: 'French'
},{
name: 'Tai Pan',
cuisine: 'Chinese'
}]
});

var groupingFeature = Ext.create('Ext.grid.feature.Grouping',{
groupHeaderTpl: 'Cuisine: {name} ({rows.length} Item{[values.rows.length > 1 ? "s" : ""]})'
});

var grid = Ext.create('Ext.grid.Panel', {
renderTo: Ext.getBody(),
collapsible: true,
iconCls: 'icon-grid',
frame: true,
store: Restaurants,
width: 600,
height: 400,
title: 'Restaurants',
features: [groupingFeature],
columns: [{
text: 'Name',
flex: 1,
dataIndex: 'name'
},{
text: 'Cuisine',
flex: 1,
dataIndex: 'cuisine'
}],
fbar : ['->', {
text:'Clear Grouping',
iconCls: 'icon-clear-group',
handler : function(){
groupingFeature.disable();
}
}]
});
});

你真的在线么