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Mastering ExtJS - Second Edition
Mastering ExtJS - Second Edition

Mastering ExtJS - Second Edition: Learn how to develop advanced and efficient Internet applications with Ext JS , Second Edition

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Mastering ExtJS - Second Edition

Chapter 2. Getting Started

In this book, we are going to dive into the Sencha Ext JS 5 world and explore real-world examples. We will also build a complete application from scratch, from the wireframe phase until the deployment in production.

Throughout this book, we are going to develop an application to manage a DVD rental store. In this chapter, we will introduce the application and describe its capabilities. You will also learn how to organize the files of the application, which is going to be built throughout the chapters of this book. This chapter will also present the mockup (wireframe) of the application and how to start organizing the screens (which is a very important step and some developers forget to do it). In this chapter, we will cover:

  • Preparing the development environment by installing the required software
  • Presenting the application and its capabilities
  • Creating mockups/wireframes of each screen
  • Creating the structure of the app using Sencha Cmd
  • Creating the loading...

Preparing the development environment

The application that we are going to develop has a very simple architecture. We are going to use Ext JS 5 on the frontend, which is going to communicate with a server-side module using Ajax/JSON, which will then communicate with a database.

The following diagram encapsulates the preceding paragraph:

Preparing the development environment

The server-side module will be developed using PHP. You need not worry if you don't know PHP. We are going to use very basic code (no frameworks), and we are going to focus on the programming logic that needs to be implemented on the server side. This way, you can apply the same logic using any other programming language, such as Java, ASP.NET, Ruby, Python, or any other (that supports the exchange of data in JSON or XML format as this is the communication format used by Ext JS). For the database, we will use MySQL. We will also use the Sakila sample schema (http://dev.mysql.com/doc/sakila/en/), a free MySQL sample database, which is perfect to demonstrate...

Presenting the application and its capabilities

The application we are going to develop throughout this book is very common to other web systems you are probably used to implementing. We will implement a DVD Rental Store management application (that is why the use of the Sakila sample database). Some of the features of the application are the security management (able to manage users and their permissions within the application), which manage actors, films, inventory, and rental information.

Ext JS will help you to achieve your goal. It provides beautiful components, a complete architecture, the possibility to reuse components (and decreases our work), and a very complete data package (that makes it easier to make connections to the server side and send and retrieve information).

We will divide the application into modules, and each module will be responsible for some features of the application. In each chapter of this book, we will implement one of the modules.

The application is composed...

Creating the application with Sencha Cmd

Let's get started and get our hands on the code. The first thing we are going to do is create the application using the MVC structure. Sencha Command (referred to as Sencha Cmd from now on) provides the capability of creating the application structure automatically for us. Utilizing Sencha Cmd is helpful not only because it creates the structure according to the MVC architecture for our application, but also because it provides all the files we need later on when going live with the software and to customize its theme—we'll learn more about this in a later chapter.

A quick word about MVC

MVC stands for Model-View-Controller. It is a software architecture pattern that separates the representation of the information from the user's interaction with it. The Model represents the application data, the View represents the output of the representation of the data (form, grid, chart), and the Controller mediates the input, converting...

Creating the loading page

When working with large Ext JS applications, it is normal to have a short delay when loading the application. This happens because Ext JS is loading all the required classes to have the application up and running, and meanwhile, all the users see is a blank screen, which can be annoying for them. A very common solution to this problem is to have a loading page, also known as a splash screen.

So let's add a splash screen to our application that looks like what is shown in the following screenshot:

Creating the loading page

First, we need to understand how this splash screen will work. After the user loads the application, the splash screen will be displayed. The application will show the splash screen while it loads all the required classes and code so that the application can be used.

We already know that the application calls the launch function when it is ready to be used. So we know that we will need to remove the splash screen on the launch method. The question now is: where inside...

Summary

In this chapter, we explored the application we will implement throughout the chapters of this book in a lot of depth. We also covered all the requirements to create the development environment for this application. You learned how to create the initial structure of an Ext JS MVC application.

You also learned, through examples, how to create a splash screen (also known as the loading screen), manipulating the DOM using the Ext.dom.Element class. You learned the steps how to start up an Ext JS application and also learned the difference between the init and launch methods from Ext.application. We left Application.js ready to display its first screen, which will be a login screen, and which you will learn how to implement in the next chapter.

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Description

If you are a developer who is familiar with Ext JS and want to augment your skills to create even better web applications, this is the book for you. Basic knowledge of JavaScript/HTML/CSS and any server-side language (PHP, Java, C#, Ruby, or Python) is required.

Who is this book for?

If you are a developer who is familiar with Ext JS and want to augment your skills to create even better web applications, this is the book for you. Basic knowledge of JavaScript/HTML/CSS and any server-side language (PHP, Java, C#, Ruby, or Python) is required.

What you will learn

  • Develop a splash and login screen Create dynamic menus and open dynamic screens Exploit master detail grids, master detail forms, trees, and charts Utilize the MVC, MVVM, and hybrid architectures Handle the information on the server side–no more JSON files! Customize and build a theme Build an application from scratch

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Publication date : Feb 24, 2015
Length: 400 pages
Edition : 2nd
Language : English
ISBN-13 : 9781784399436
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Length: 400 pages
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Table of Contents

12 Chapters
1. Sencha Ext JS Overview Chevron down icon Chevron up icon
2. Getting Started Chevron down icon Chevron up icon
3. The Login Page Chevron down icon Chevron up icon
4. The Logout and Multilingual Capabilities Chevron down icon Chevron up icon
5. Advanced Dynamic Menu Chevron down icon Chevron up icon
6. User Management Chevron down icon Chevron up icon
7. Static Data Management Chevron down icon Chevron up icon
8. Content Management Chevron down icon Chevron up icon
9. Adding Extra Capabilities Chevron down icon Chevron up icon
10. Routing, Touch Support, and Debugging Chevron down icon Chevron up icon
11. Preparing for Production and Themes Chevron down icon Chevron up icon
Index Chevron down icon Chevron up icon

Customer reviews

Rating distribution
Full star icon Full star icon Full star icon Full star icon Empty star icon 4
(3 Ratings)
5 star 33.3%
4 star 33.3%
3 star 33.3%
2 star 0%
1 star 0%
Dalton May 29, 2015
Full star icon Full star icon Full star icon Full star icon Full star icon 5
Great starter book with some advanced information.
Amazon Verified review Amazon
Guillermo Cediel Blanco Oct 24, 2015
Full star icon Full star icon Full star icon Full star icon Empty star icon 4
Se trata de uno de los mejores libros de programación que he leído. En él se aborda el diseño e implantación completos de una aplicación (para la gestión de un videoclub) utilizando Ext JS, y PHP para la parte de back-end. El libro es realmente muy bueno; entra en detalle de todas las particularidades de Ext JS, así como de las distintas opciones a aplicar para cada una de los problemas presentados. Hay que tener en cuenta que si se sigue el libro al pie de la letra, hay que 'picar' completamente el código de la aplicación (por supuesto, se pueden copiar o seguir los listados, pero no es lo mismo; a mi modo de ver, es mucho mejor modificar progresivamente cada archivo de código) y, como punto negativo (menor), esto ocasiona que en ocasiones sea difícil de seguir, o que te puedas perder, si se te pasa inadvertidamente algún paso. Hay alguna errata mínima, pero con un poco de atención (y de investigación, que además redunda en un mejor aprendizaje), se soluciona sin problemas.En resumen, muy buen libro, y sobre todo muy práctico. No le pongo 5 estrellas, porque en mi opinión (casi) ningún libro se merece 5 estrellas ;-)
Amazon Verified review Amazon
Sam D Mar 07, 2016
Full star icon Full star icon Full star icon Empty star icon Empty star icon 3
not enough detail.
Amazon Verified review Amazon
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