Exemplo ExtJS 4 MVC: Binding de Grid com Form

Mais um exemplo MVC de ExtJS 4 aqui no blog. Hoje vamos ver o código do exemplo Binding a Grid to a Form.

Vamos ao código então!

Estrutura do Projeto

Model

[code lang="js" firstline="1" toolbar="true" collapse="false" wraplines="false"]
Ext.define('Ext4Example.model.Stock', {
extend: 'Ext.data.Model',
fields: [
{name: 'company'},
{name: 'price', type: 'float'},
{name: 'change', type: 'float'},
{name: 'pctChange', type: 'float'},
{name: 'lastChange', type: 'date', dateFormat: 'n/j h:ia'},
// Rating dependent upon performance 0 = best, 2 = worst
{name: 'rating', type: 'int', convert: function(value, record) {
var pct = record.get('pctChange');
if (pct < 0) return 2;
if (pct < 1) return 1;
return 0;
}}
]
});
[/code]

Store

[code lang="js" firstline="1" toolbar="true" collapse="false" wraplines="false"]
Ext.define('Ext4Example.store.Stocks', {
extend: 'Ext.data.ArrayStore',
model: 'Ext4Example.model.Stock',
data: [
['3m Co', 71.72, 0.02, 0.03, '9/1 12:00am'],
['Alcoa Inc', 29.01, 0.42, 1.47, '9/1 12:00am'],
['Altria Group Inc', 83.81, 0.28, 0.34, '9/1 12:00am'],
['American Express Company', 52.55, 0.01, 0.02, '9/1 12:00am'],
['American International Group, Inc.', 64.13, 0.31, 0.49, '9/1 12:00am'],
['AT&T Inc.', 31.61, -0.48, -1.54, '9/1 12:00am'],
['Boeing Co.', 75.43, 0.53, 0.71, '9/1 12:00am'],
['Caterpillar Inc.', 67.27, 0.92, 1.39, '9/1 12:00am'],
['Citigroup, Inc.', 49.37, 0.02, 0.04, '9/1 12:00am'],
['E.I. du Pont de Nemours and Company', 40.48, 0.51, 1.28, '9/1 12:00am'],
['Exxon Mobil Corp', 68.1, -0.43, -0.64, '9/1 12:00am'],
['General Electric Company', 34.14, -0.08, -0.23, '9/1 12:00am'],
['General Motors Corporation', 30.27, 1.09, 3.74, '9/1 12:00am'],
['Hewlett-Packard Co.', 36.53, -0.03, -0.08, '9/1 12:00am'],
['Honeywell Intl Inc', 38.77, 0.05, 0.13, '9/1 12:00am'],
['Intel Corporation', 19.88, 0.31, 1.58, '9/1 12:00am'],
['International Business Machines', 81.41, 0.44, 0.54, '9/1 12:00am'],
['Johnson & Johnson', 64.72, 0.06, 0.09, '9/1 12:00am'],
['JP Morgan & Chase & Co', 45.73, 0.07, 0.15, '9/1 12:00am'],
['McDonald\'s Corporation', 36.76, 0.86, 2.40, '9/1 12:00am'],
['Merck & Co., Inc.', 40.96, 0.41, 1.01, '9/1 12:00am'],
['Microsoft Corporation', 25.84, 0.14, 0.54, '9/1 12:00am'],
['Pfizer Inc', 27.96, 0.4, 1.45, '9/1 12:00am'],
['The Coca-Cola Company', 45.07, 0.26, 0.58, '9/1 12:00am'],
['The Home Depot, Inc.', 34.64, 0.35, 1.02, '9/1 12:00am'],
['The Procter & Gamble Company', 61.91, 0.01, 0.02, '9/1 12:00am'],
['United Technologies Corporation', 63.26, 0.55, 0.88, '9/1 12:00am'],
['Verizon Communications', 35.57, 0.39, 1.11, '9/1 12:00am'],
['Wal-Mart Stores, Inc.', 45.45, 0.73, 1.63, '9/1 12:00am']
]
});
[/code]

View - Grid

[code lang="js" firstline="1" toolbar="true" collapse="false" wraplines="false"]
Ext.define('Ext4Example.view.stock.StockGrid' ,{
extend: 'Ext.grid.Panel',
alias : 'widget.stockgrid',

title : 'Company Data',

/**
* Custom function used for column renderer
* @param {Object} val
*/
change: function(val) {
if (val > 0) {
return '<span style="color: green;">' + val + '</span>';
} else if (val < 0) {
return '<span style="color: red;">' + val + '</span>';
}
return val;
},

/**
* Custom function used for column renderer
* @param {Object} val
*/
pctChange: function(val) {
if (val > 0) {
return '<span style="color: green;">' + val + '%</span>';
} else if (val < 0) {
return '<span style="color: red;">' + val + '%</span>';
}
return val;
},

// render rating as "A", "B" or "C" depending upon numeric value.
rating: function(v) {
if (v == 0) return "A";
if (v == 1) return "B";
if (v == 2) return "C";
},

viewConfig: {
stripeRows: true
},

initComponent: function() {

this.store = 'Stocks';

this.columns = [{
text : 'Company',
flex : 1,
sortable : false,
dataIndex: 'company'
},
{
text : 'Price',
width : 75,
sortable : true,
renderer : 'usMoney',
dataIndex: 'price'
},
{
text : 'Change',
width : 75,
sortable : true,
renderer : this.change,
dataIndex: 'change'
},
{
text : '% Change',
width : 75,
sortable : true,
renderer : this.pctChange,
dataIndex: 'pctChange'
},
{
text : 'Last Updated',
width : 85,
sortable : true,
renderer : Ext.util.Format.dateRenderer('m/d/Y'),
dataIndex: 'lastChange'
},
{
text: 'Rating',
width: 30,
sortable: true,
renderer: this.rating,
dataIndex: 'rating'
}];

this.callParent(arguments);
}
});
[/code]

View - Form

[code lang="js" firstline="1" toolbar="true" collapse="false" wraplines="false"]
Ext.define('Ext4Example.view.stock.StockForm' ,{
extend: 'Ext.form.FieldSet',
alias : 'widget.stockform',

margin: '0 0 0 10',

title:'Company details',

defaults: {
width: 240,
labelWidth: 90
},

defaultType: 'textfield',

items: [{
fieldLabel: 'Name',
name: 'company'
},{
fieldLabel: 'Price',
name: 'price'
},{
fieldLabel: '% Change',
name: 'pctChange'
},{
xtype: 'datefield',
fieldLabel: 'Last Updated',
name: 'lastChange'
}, {
xtype: 'radiogroup',
fieldLabel: 'Rating',
columns: 3,
defaults: {
name: 'rating' //Each radio has the same name so the browser will make sure only one is checked at once
},
items: [{
inputValue: '0',
boxLabel: 'A'
}, {
inputValue: '1',
boxLabel: 'B'
}, {
inputValue: '2',
boxLabel: 'C'
}]
}]
});
[/code]

View - Panel

[code lang="js" firstline="1" toolbar="true" collapse="false" wraplines="false"]
Ext.define('Ext4Example.view.stock.StockPanel' ,{
extend: 'Ext.form.Panel',
alias : 'widget.stockpanel',

frame: true,
title: 'Company Data',
bodyPadding: 5,
layout: 'column', // Specifies that the items will now be arranged in columns

fieldDefaults: {
labelAlign: 'left',
msgTarget: 'side'
},

items: [{
xtype: 'stockgrid',
columnWidth: .70
},{
xtype: 'stockform',
columnWidth: .30
}]

});
[/code]

View- Viewport

[code lang="js" firstline="1" toolbar="true" collapse="false" wraplines="false"]
/**
* The main application viewport, which displays the whole application
* @extends Ext.Viewport
*/
Ext.define('Ext4Example.view.Viewport', {
extend: 'Ext.Viewport',
layout: 'fit',

requires: [
'Ext4Example.view.stock.StockGrid',
'Ext4Example.view.stock.StockForm'
],

initComponent: function() {
var me = this;

Ext.apply(me, {
items: [
{
xtype: 'stockpanel'
}
]
});

me.callParent(arguments);
}
});
[/code]

Controller

[code lang="js" firstline="1" toolbar="true" collapse="false" wraplines="false"]
Ext.define('Ext4Example.controller.Stocks', {
extend: 'Ext.app.Controller',

stores: ['Stocks'],

models: ['Stock'],

views: ['stock.StockGrid','stock.StockForm','stock.StockPanel'],

refs: [{
ref: 'stockForm',
selector: 'form'
}],

init: function() {

this.control({
'stockgrid': {
selectionchange: this.gridSelectionChange,
viewready: this.onViewReady
}
});
},

gridSelectionChange: function(model, records) {

if (records[0]) {
this.getStockForm().getForm().loadRecord(records[0]);
}
},

onViewReady: function(grid) {
grid.getSelectionModel().select(0);
}
});
[/code]

App.js

[code lang="js" firstline="1" toolbar="true" collapse="false" wraplines="false"]
Ext.application({
name: 'Ext4Example',

controllers: [
'Stocks'
],

autoCreateViewport: true
});
[/code]

Página HTML

[code lang="html" firstline="1" toolbar="true" collapse="false" wraplines="false"]
<html>
<head>
<title>Ext JS 4 Examples - loiane.com</title>

<!-- Ext JS Files -->
<link rel="stylesheet" type="text/css" href="extjs/resources/css/ext-all.css">
<script type="text/javascript" src="extjs/ext-debug.js"></script>

<!-- App Files -->
<script type="text/javascript" src="app.js"></script>

</head>
<body>
</body>
</html>
[/code]

Download do código fonte completo

Você pode fazer o download do código fonte completo através dos meu repositório do Github: https://github.com/loiane/extjs4-mvc-grid-binded-form

Demo

Para ver esse projeto rodando, acesse o link: http://loiane.com/extjs/extjs4-mvc-grid-binded-form

Até o próximo exemplo! :)