Exemplo ExtJS 4 MVC: Paging Grid

Mais um exemplo MVC de ExtJS 4 aqui no blog. Hoje vamos ver o código do exemplo Paging Grid.

Vamos ao código então!

Estrutura do Projeto

Model

[code lang="js" firstline="1" toolbar="true" collapse="false" wraplines="false"]
Ext.define('ExtMVC.model.ForumThread', {
extend: 'Ext.data.Model',
fields: [
'title',
'forumtitle',
'forumid',
'username',
{name: 'replycount', type: 'int'},
{name: 'lastpost', mapping: 'lastpost', type: 'date', dateFormat: 'timestamp'},
'lastposter',
'excerpt',
'threadid'
],
idProperty: 'threadid'
});
[/code]

Store

[code lang="js" firstline="1" toolbar="true" collapse="false" wraplines="false"]
Ext.define('ExtMVC.store.ForumThreads', {
extend: 'Ext.data.Store',
model: 'ExtMVC.model.ForumThread',
autoLoad: true,
remoteSort: true,
proxy: {
// load using script tags for cross domain, if the data in on the same domain as
// this page, an HttpProxy would be better
type: 'jsonp',
url: 'http://www.sencha.com/forum/topics-browse-remote.php',
reader: {
root: 'topics',
totalProperty: 'totalCount'
},
// sends single sort as multi parameter
simpleSortMode: true
},
sorters: [{
property: 'lastpost',
direction: 'DESC'
}]
});
[/code]

View - Grid

[code lang="js" firstline="1" toolbar="true" collapse="false" wraplines="false"]
Ext.define('ExtMVC.view.forumThread.ForumThreadGrid' ,{
extend: 'Ext.grid.Panel',
alias : 'widget.forumthreadgrid',

requires: 'Ext.ux.PreviewPlugin',

title : 'ExtJS.com - Browse Forums',

disableSelection: true,

loadMask: true,

viewConfig: {
id: 'gv',
trackOver: false,
stripeRows: false,
plugins: [{
ptype: 'preview',
bodyField: 'excerpt',
expanded: true,
pluginId: 'preview'
}]
},

// pluggable renders
renderTopic: function(value, p, record) {
return Ext.String.format(
'<strong><a href="http://sencha.com/forum/showthread.php?t={2}" target="_blank">{0}</a></strong><a href="http://sencha.com/forum/forumdisplay.php?f={3}" target="_blank">{1} Forum</a>',
value,
record.data.forumtitle,
record.getId(),
record.data.forumid
);
},

renderLast: function(value, p, r) {
return Ext.String.format('{0}
by {1}', Ext.Date.dateFormat(value, 'M j, Y, g:i a'), r.get('lastposter'));
},

initComponent: function() {

this.store = 'ForumThreads';

this.columns = [
{
id: 'topic',
text: "Topic",
dataIndex: 'title',
flex: 1,
renderer: this.renderTopic,
sortable: false
},{
text: "Author",
dataIndex: 'username',
width: 100,
hidden: true,
sortable: true
},{
text: "Replies",
dataIndex: 'replycount',
width: 70,
align: 'right',
sortable: true
},{
id: 'last',
text: "Last Post",
dataIndex: 'lastpost',
width: 150,
renderer: this.renderLast,
sortable: true
}];

// paging bar on the bottom
this.bbar = Ext.create('Ext.PagingToolbar', {
store: this.store,
displayInfo: true,
displayMsg: 'Displaying topics {0} - {1} of {2}',
emptyMsg: "No topics to display",
items:[
'-', {
xtype: 'button',
text: 'Show Preview',
pressed: true,
action: 'showPreview',
enableToggle: true
}]
});

this.callParent(arguments);
}
});
[/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('ExtMVC.view.Viewport', {
extend: 'Ext.Viewport',
layout: 'fit',

requires: [
'ExtMVC.view.forumThread.ForumThreadGrid'
],

initComponent: function() {
var me = this;

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

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

Controller

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

stores: ['ForumThreads'],

models: ['ForumThread'],

views: ['forumThread.ForumThreadGrid'],

init: function() {
this.control({
'forumthreadgrid button[action=showPreview]': {
toggle: this.showPreview
}
});
},

showPreview: function(btn, pressed){

var preview = Ext.ComponentQuery.query('forumthreadgrid dataview')[0].plugins[0];

preview.toggleExpanded(pressed);
}
});
[/code]

App.js

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

paths: { 'Ext.ux': 'extjs/ux/' },

controllers: [
'ForumThreads'
],

autoCreateViewport: true
});
[/code]

Página HTML

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

</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-paging-grid

Demo

Para ver esse projeto rodando, acesse o link: https://loiane.com/extjs/extjs4-mvc-paging-grid/

Até o próximo exemplo! :)