Introduction to Ext JS 4

TEQneers GmbH & Co. KG www.teqneers.de

Who?

‣ Stefan Gehrig
‣ @sgehrig
‣ gehrig@teqneers.de
‣ TEQneers GmbH & Co. KG, Stuttgart
‣ Software Architect, Senior Developer PHP &
Javascript

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Products
‣ Ext JS 4.1 ‣ Sencha.io

‣ Ext JS 3.4 ‣ Ext Core

‣ Sencha GXT 3 ‣ Sencha SDK Tools

‣ Sencha Touch 2 ‣ JSBuilder

‣ Sencha Touch Charts

‣ Sencha Architect 2

‣ Sencha Animator

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History
‣ 01/2006 Jack Slocum developed an extension for YUI
called yui-ext
‣ 06/2006 Ext JS 1.1 with adapters for YUI, jQuery or
Prototype
‣ 04/2008 Ext JS 2.0 (dual license GPLv3 + commercial)
‣ 07/2009 Ext JS 3.0
‣ 06/2010 Raphaël + jQTouch + theJIT + Ext JS = Sencha
‣ 05/2011 Sencha Touch 1.0 and Ext JS 4.0
‣ 04/2012 Ext JS 4.1
‣ 06/2012 Sencha Touch 2.0

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Some Ext JS experience?

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‣ Who has already used Javascript Frameworks?

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‣ If so, which ones?

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‣ Who knows Ext JS?

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‣ Who has already worked with Ext JS?

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‣ Who has already worked with Ext JS?
‣ If so, which version(s)?

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Ext JS 4.0/4.1

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What are we talking about?

Slide 8


What is Ext JS?

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What is Ext JS?
Widgets

Slide 8


What is Ext JS?
Widgets
Layouts

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What is Ext JS?
Widgets
Layouts
Data Package

Slide 8


What is Ext JS?
Widgets
Layouts
Data Package
Class System

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What is Ext JS?
Widgets
Layouts
Data Package
Class System
DOM Manipulation

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What is Ext JS?
Widgets
Layouts
Data Package
Class System
DOM Manipulation
Miscellaneous

Slide 8


What is Ext JS?
Widgets
Layouts
Data Package
Class System
DOM Manipulation
Miscellaneous
Theming

Slide 8


What is Ext JS?

Widgets

Layouts

Data Package

Class System

DOM Manipulation

Miscellaneous

Theming

Slide 9


„Full-Stack“-
Javascript-Framework

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„Full-Stack“-Javascript-Framework

Slide 11


‣ Huge widget library

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‣ MVC application
oriented code

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‣ MVC application
oriented code

‣ Layouts

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‣ MVC application
oriented code

‣ Layouts

‣ Data package

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‣ MVC application
oriented code

‣ Layouts

‣ Data package

‣ Class system

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‣ MVC application
oriented code

‣ Layouts

‣ Data package

‣ Class system

‣ DOM manipulation

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‣ MVC application
oriented code

‣ Layouts

‣ Data package

‣ Class system


‣ Templating
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‣ Huge widget library ‣ Drawing / charting

‣ MVC application
oriented code

‣ Layouts

‣ Data package

‣ Class system


‣ Templating
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‣ MVC application ‣ AJAX
oriented code (XMLHttpRequest)

‣ Layouts

‣ Data package

‣ Class system


‣ Templating
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‣ Layouts ‣ Utilities

‣ Data package

‣ Class system


‣ Templating
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‣ Data package ‣ Well documented API,
clean code
‣ Class system


‣ Templating
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‣ Data package ‣ Well documented API,
clean code
‣ Class system
‣ Re-usable code,
‣ DOM manipulation excellent cross-
browser compatibility
‣ Templating
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Structure

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Structure

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Structure

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What is Ext JS?

Widgets

Layouts

Data Package

Class System

DOM Manipulation

Miscellaneous

Theming

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Ext.button.Button

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Ext.button.Button
Ext.create('Ext.Button', {
! text: 'Click me',
! renderTo: Ext.getBody(),
! handler: function() {
! ! alert('You clicked the button!');
! }
});

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Ext.button.Button
! text: 'Click me',
! }
});

renderTo: Ext.getBody(),
text: 'Click Me',
enableToggle: true
});

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Ext.button.Button
! text: 'Click me',
! }
});

renderTo: Ext.getBody(),
text: 'Click Me',
enableToggle: true
});

text : 'Menu button',
renderTo : Ext.getBody(),
menu : [
{text: 'Item 1'},
{text: 'Item 2'},
{text: 'Item 3'},
{text: 'Item 4'}
]
});

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Ext.form.Panel / Ext.form.*

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Ext.form.Panel / Ext.form.*
Ext.create('Ext.form.Panel', {
! frame: true,
! title: 'Form Fields',
! width: 340,
! bodyPadding: 5,

! fieldDefaults: {
! ! labelAlign: 'left',
! ! labelWidth: 90,
! ! anchor: '100%'
! },

! items: [{
! ! xtype: 'textfield',
! ! name: 'textfield1',
! ! fieldLabel: 'Text field',
! ! value: 'Text field value'
! }, {
! ! xtype: 'textfield',
! ! name: 'password1',
! ! inputType: 'password',
! ! fieldLabel: 'Password field'
! }, {
! ! xtype: 'filefield',
! ! name: 'file1',
! ! fieldLabel: 'File upload'
! }, {
! ! xtype: 'textareafield',
! ! name: 'textarea1',
! ! fieldLabel: 'TextArea',
! ! value: 'Textarea value'
! }, ...]
});

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Ext.grid.Panel

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Ext.grid.Panel
Ext.create('Ext.data.Store', {
storeId:'simpsonsStore',
fields:['name', 'email', 'phone'],
data:{'items':[
{ 'name': 'Lisa', "email":"lisa@simpsons.com", "phone":"555-111-1224" },
{ 'name': 'Bart', "email":"bart@simpsons.com", "phone":"555-222-1234" },
{ 'name': 'Homer', "email":"home@simpsons.com", "phone":"555-222-1244" },
{ 'name': 'Marge', "email":"marge@simpsons.com", "phone":"555-222-1254" }
]},
proxy: {
type: 'memory',
reader: {
type: 'json',
root: 'items'
}
}
});

Ext.create('Ext.grid.Panel', {
title: 'Simpsons',
store: Ext.data.StoreManager.lookup('simpsonsStore'),
columns: [
{ header: 'Name', dataIndex: 'name' },
{ header: 'Email', dataIndex: 'email', flex: 1 },
{ header: 'Phone', dataIndex: 'phone' }
],
height: 200,
width: 400,
renderTo: Ext.getBody()
});

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Ext.panel.Panel

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Ext.panel.Panel
Ext.create('Ext.panel.Panel', {
bodyPadding: 5,
width: 300,
title: 'Filters',
items: [{
xtype: 'datefield',
fieldLabel: 'Start date'
}, {
xtype: 'datefield',
fieldLabel: 'End date'
}],
});

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Ext.slider.*

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Ext.slider.*
Ext.create('Ext.slider.Single', {
width: 200,
value: 50,
increment: 10,
minValue: 0,
maxValue: 100,
});

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Ext.slider.*
Ext.create('Ext.slider.Single', {
width: 200,
value: 50,
increment: 10,
minValue: 0,
maxValue: 100,
});

Ext.create('Ext.slider.Multi', {
width: 200,
values: [25, 50, 75],
increment: 5,
minValue: 0,
maxValue: 100,
constrainThumbs: false,
});

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Ext.slider.*
Ext.create('Ext.slider.Single', { Ext.create('Ext.slider.Single', {
width: 200, width: 214,
value: 50, minValue: 0,
increment: 10, maxValue: 100,
minValue: 0, useTips: true,
maxValue: 100, tipText: function(thumb){
renderTo: Ext.getBody() return Ext.String.format('**{0}% complete**', thumb.value);
}); },
});

Ext.create('Ext.slider.Multi', {
width: 200,
values: [25, 50, 75],
increment: 5,
minValue: 0,
maxValue: 100,
constrainThumbs: false,
});

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Ext.tab.Panel

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Ext.tab.Panel
Ext.create('Ext.tab.Panel', {
width: 300,
height: 200,
activeTab: 0,
items: [
{
title: 'Tab 1',
bodyPadding: 10,
html : 'A simple tab'
},
{
title: 'Tab 2',
html : 'Another one'
}
],
renderTo : Ext.getBody()
});

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Ext.toolbar.Toolbar

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Ext.toolbar.Toolbar
Ext.create('Ext.toolbar.Toolbar', {
renderTo: document.body,
width : 500,
items: [
{
text: 'Button'
},
{
xtype: 'splitbutton',
text : 'Split Button'
},
'->',
{
xtype : 'textfield',
name : 'field1',
emptyText: 'enter search term'
},
'-',
'text 1',
{ xtype: 'tbspacer' },
'text 2',
{ xtype: 'tbspacer', width: 50 },
'text 3'
]
});

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Ext.tree.Panel

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Ext.tree.Panel
var store = Ext.create('Ext.data.TreeStore', {
root: {
expanded: true,
children: [
{ text: "detention", leaf: true },
{ text: "homework", expanded: true, children: [
{ text: "book report", leaf: true },
{ text: "alegrbra", leaf: true}
] },
{ text: "buy lottery tickets", leaf: true }
]
}
});

Ext.create('Ext.tree.Panel', {
title: 'Simple Tree',
width: 200,
height: 150,
store: store,
rootVisible: false,
});

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Ext.window.MessageBox

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Ext.window.MessageBox

Ext.Msg.show({
title:'Save Changes?',
msg: 'You are closing a tab that has unsaved changes. Would you like to save your
changes?',
buttons: Ext.Msg.YESNOCANCEL,
icon: Ext.Msg.QUESTION
});

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Ext.window.Window

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Ext.window.Window

Ext.create('Ext.window.Window', {
title: 'Hello',
height: 200,
width: 400,
layout: 'fit',
items: {
xtype: 'grid',
border: false,
columns: [{header: 'World'}],
store: Ext.create('Ext.data.ArrayStore', {})
}
}).show();

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What is Ext JS?

Widgets

Layouts

Data Package

Class System

DOM Manipulation

Miscellaneous

Theming

Slide 26


Layouts

‣ Ext JS applications are build
on components

‣ Containers are specialized
components that contain
other components (or
containers)

‣ Sizing and positioning of a
containers‘ children is
determined by the speciﬁed
layout

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Ext.layout.*

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Examples

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What is Ext JS?

Widgets

Layouts

Data Package

Class System

DOM Manipulation

Miscellaneous

Theming

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Overview

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Overview

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Overview
‣ implements Active Record pattern on the client side (sort
of)

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Overview
of)
‣ abstracts CRUD operations regardless of

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Overview
of)
‣ the underlying storage mechanism

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Overview
of)
‣ remote (AJAX, JSON-P or Ext.direct)

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Overview
of)
‣ local (memory, local/session storage)

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Overview
of)
‣ the data format

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Overview
of)
‣ the data format
‣ JSON

Slide 32


Overview
of)
‣ the data format
‣ JSON
‣ XML

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Overview
of)
‣ the data format
‣ JSON
‣ XML
‣ works seamlessly with all data bound widgets

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Example

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What is Ext JS?

Widgets

Layouts

Data Package

Class System

DOM Manipulation

Miscellaneous

Theming

Slide 34


A class system in
Javascript- why?

Slide 35


Javascript is a class-
less, prototype-based
language

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Class System

Slide 37


Class System

‣ most developers are more familiar with class-
based languages

Slide 37


Class System

based languages
‣ Code based on a class system is easier to handle

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Class System

based languages
‣ predictable strcutures

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Class System

based languages
‣ easily identiﬁable extension points

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Class System

based languages
‣ easily identiﬁable extension points
‣ less maintenance required

Slide 37


Example
Ext.define('My.sample.Person', {
name: 'Unknown',

constructor: function(name) {
if (name) {
this.name = name;
}
},

eat: function(foodType) {
console.log(this.name + " is eating: " + foodType);
}
});
Ext.define('My.sample.Tattletale', {
! extend: 'My.sample.Person',

say: function(something) {
console.log(this.name + " says: " + something);
}
});

var aaron = Ext.create('My.sample.Person', 'Aaron');
aaron.eat("Salad");
var maria = Ext.create('My.sample.Tattletale', 'Maria');
maria.eat("Sausage");
maria.say("Bla bla blub");

Slide 38


Statics
Ext.define('Computer', {
statics: {
instanceCount: 0,
factory: function(brand) {
return new this(brand);
}
},

! brand: null,

constructor: function(brand) {
this.brand! = brand;
this.self.instanceCount ++;
}
});

var dellComputer = Computer.factory('Dell');
var appleComputer = Computer.factory('Mac');

alert(appleComputer.brand);

alert(Computer.instanceCount);

Slide 39


Conﬁg
Ext.define('MyClass', {

config: {
title: 'Default Title'
},

applyTitle: function(newTitle) {
if (!Ext.isString(newTitle) || newTitle.length === 0) {
throw 'Error: Title must be a valid non-empty string';
}
else {
return newTitle;
}
}

! /*
! getTitle: function() {
return this.title;
},

setTitle: function(newTitle) {
this.title! = this.applyTitle(newTitle);
}
! */
});

Slide 40


Mixins

Slide 41


Singleton

Ext.define('Logger', {
singleton: true,
log: function(msg) {
console.log(msg);
}
});

Logger.log('Hello');

Slide 42


The Class Deﬁnition Pipeline

Slide 43


Summary

‣ Class system combines classic and well-known
methodologies with the dynamic nature of
Javascript
‣ When sticking to the naming convention
(compare to PSR-0 in PHP) Ext JS provides
dynamic code loading (auto-loading)
‣ Class system is the foundation of the whole
framework (more than 300 shipped classes)

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What is Ext JS?

Widgets

Layouts

Data Package

Class System

DOM Manipulation

Miscellaneous

Theming

Slide 45


DOM Manipulation

‣ comparable to the functionality provided by
jQuery
‣ not as sophisticated
‣ not as fast
‣ syntax not as sleek
‣ but absolutely sufﬁcient when working inside
the widget system

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Features

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Features


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Features

‣ DOM queries

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Features

‣ DOM queries
‣ Animations

Slide 47


Ext.dom.Helper

var dh = Ext.DomHelper; // create shorthand alias
var spec = {
id: 'my-ul',
tag: 'ul',
cls: 'my-list',
children: [
{tag: 'li', id: 'item0', html: 'List Item 0'},
{tag: 'li', id: 'item2', html: 'List Item 2'}
]
};
var list = dh.append(
Ext.getBody(),
spec
);

dh.append(list, [
{tag: 'li', id: 'item4', html: 'List Item 4'}
]);

Slide 48


Ext.dom.Helper - Templating

var html = '<a id="{id}" href="{url}" class="nav">{text}</a>';

var tpl = Ext.DomHelper.createTemplate(html);
tpl.append(Ext.getBody(), {
id: 'link1',
url: 'http://www.edspencer.net/',
text: "Ed's Site"
});
tpl.append(Ext.getBody(), {
id: 'link2',
url: 'http://www.dustindiaz.com/',
text: "Dustin's Site"
});

Slide 49


Ext.dom.Query

‣ provides selector and XPath processing
‣ extendable with custom pseudo classes and
matchers
‣ works on HTML and XML
‣ supports most of the CSS3 selectors spec and
basic XPath

Slide 50


Animations

var myComponent = Ext.create('Ext.Component', {
renderTo: document.body,
width: 200,
height: 200,
style: 'border: 1px solid red;'
});

Ext.create('Ext.fx.Anim', {
target: myComponent,
duration: 1000,
from: {
width: 400
},
to: {
width: 300,
height: 300
}
});

Slide 51


Keyframes

Ext.create('Ext.fx.Animator', {
target: Ext.getBody().createChild({
style: {
width: '100px',
height: '100px',
'background-color': 'red'
}
}),
duration: 10000, // 10 seconds
keyframes: {
0: { opacity: 1, backgroundColor: 'FF0000' },
20: { x: 30, opacity: 0.5 },
40: { x: 130, backgroundColor: '0000FF' },
60: { y: 80, opacity: 0.3 },
80: { width: 200, y: 200 },
100: { opacity: 1, backgroundColor: '00FF00' }
}
});

Slide 52


What is Ext JS?

Widgets

Layouts

Data Package

Class System

DOM Manipulation

Miscellaneous

Theming

Slide 53


Utilities

Slide 54


Tools
‣ Ext.Array ‣ Ext.util.TextMetrics
‣ Ext.Number ‣ Collections
‣ Ext.Object ‣ HashMaps
‣ Ext.String ‣ Events & Tasks
‣ Ext.JSON
‣ Ext.Date
‣ Ext.Function
‣ Ext.util.Format

Slide 55


Templating

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Templating
var order!= ...,
! template = new Ext.XTemplate(
'<table class="order">',
! '<tbody>',
! '<tpl for=".">',
! ! '<tpl for="OrderDetails">',
! ! ! '<tr class="{[xindex % 2 === 0 ? "even" : "odd"]}">',
! ! ! ! '<tpl if="xindex == 1">',
! ! ! ! ! '<th rowspan="{[xcount]}">{parent.Order.Id}</th>',
! ! ! ! '</tpl>',
! ! ! ! '<td>{#}.</td>',
! ! ! ! '<td>Product ID <b>{ProductId}</b></td>',
! ! ! ! '<td><tpl if="UnitPrice > 15"><u>{UnitPrice:usMoney}</u></tpl><tpl
if="UnitPrice <= 15">{UnitPrice:usMoney}</tpl></td>',
! ! ! ! '<td>{Quantity * 0.5}</td>',
! ! ! '</tpl>',
! ! '</tr>',
! '</tpl>',
! '</tbody>',
'</table>'
);

// apply the CustomerOrders array to the template
template.append('content', order.CustomerOrders);

Slide 57


Example

Slide 58


AJAX

Slide 59


Simple XMLHttpRequest

Ext.Ajax.request({
url: 'some_page.php',
success: function(response, opts) {
var obj = Ext.decode(response.responseText);
console.log(obj);
},
failure: function(response, opts) {
console.log('server-side failure with status code ' + response.status);
}
});

Slide 60


Can even fake ﬁle uploads...

Ext.Ajax.request({
url: 'upload.php',
! form: 'id_of_a_form_with_an_upload_element',
! isUpload: true,
success: function(response, opts) {
var obj = Ext.decode(response.responseText);
console.dir(obj);
},
failure: function(response, opts) {
console.log('server-side failure with status code ' + response.status);
}
});

Slide 61


Keyboard
Navgation

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Drag and Drop

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Drawing

Slide 64


Drawing

‣ renders either
‣ SVG
‣ VML (IE < 9)

Slide 65


Examples

Slide 66


Charting

Slide 67


Charting

Slide 68


Charting

‣ relatively simple charting solution out of the box
‣ but: lacks a lot of features when compared to
professional enterprise-grade solutions such as
Highcharts JS for example

Slide 69


Example

Slide 70


What is Ext JS?

Widgets

Layouts

Data Package

Class System

DOM Manipulation

Miscellaneous

Theming

Slide 71


Theming
‣ uses SASS and Compass as CSS pre-processor
‣ component UIs allow for easy extension / styling

@include extjs-panel-ui( Ext.create('widget.panel', {
'bubble', ui: 'bubble',
width: 300,
$ui-header-font-size: 12px, height: 300,
$ui-header-font-weight: bold, title: 'Panel with a bubble UI!'
$ui-header-color: #0D2A59, });
$ui-header-background-color: #fff,
$ui-header-background-gradient: null,

$ui-border-color: #fff,
$ui-border-radius: 4px,
$ui-body-background-color: #fff,
$ui-body-font-size: 14px
);

Slide 72


Questions?

Slide 73


Thank you, come
again!

Slide 74


Links
‣ http://www.sencha.com/
‣ http://www.sencha.com/products/extjs/
‣ http://docs.sencha.com/ext-js/4-1/
‣ Ext JS 4.1
‣ http://www.sencha.com/blog/ﬁrst-thoughts-on-ext-js/
‣ http://www.sencha.com/blog/optimizing-ext-js-4-1-based-applications/
‣ Class System
‣ http://www.sencha.com/learn/sencha-class-system/
‣ http://www.sencha.com/blog/countdown-to-ext-js-4-dynamic-loading-and-new-class-system
‣ http://edspencer.net/2011/01/classes-in-ext-js-4-under-the-hood.html
‣ http://edspencer.net/2011/01/ext-js-4-the-class-deﬁnition-pipeline.html
‣ Data Package
‣ http://www.sencha.com/blog/countdown-to-ext-js-4-data-package/
‣ http://www.sencha.com/blog/ext-js-4-anatomy-of-a-model/
‣ http://edspencer.net/2011/02/proxies-extjs-4.html
‣ Templating
‣ http://sgehrig.github.com/Ext-Templating-Examples/

Slide 75


Introduction to Ext JS 4

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