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Terms, Icons, and Labels

Many classes have shortcut names used when creating (instantiating) a class with a configuration object. The shortcut name is referred to as an alias (or xtype if the class extends Ext.Component). The alias/xtype is listed next to the class name of applicable classes for quick reference.

Access Levels

Framework classes or their members may be specified as private or protected. Else, the class / member is public. Public, protected, and private are access descriptors used to convey how and when the class or class member should be used.

Member Types

Member Syntax

Below is an example class member that we can disect to show the syntax of a class member (the lookupComponent method as viewed from the Ext.button.Button class in this case).

lookupComponent ( item ) : Ext.Component

Called when a raw config object is added to this container either during initialization of the items config, or when new items are added), or {@link #insert inserted.

This method converts the passed object into an instanced child component.

This may be overridden in subclasses when special processing needs to be applied to child creation.


item :  Object

The config object being added.


The component to be added.

Let's look at each part of the member row:

Member Flags

The API documentation uses a number of flags to further commnicate the class member's function and intent. The label may be represented by a text label, an abbreviation, or an icon.

Class Icons

- Indicates a framework class

- A singleton framework class. *See the singleton flag for more information

- A component-type framework class (any class within the Ext JS framework that extends Ext.Component)

- Indicates that the class, member, or guide is new in the currently viewed version

Member Icons

- Indicates a class member of type config

- Indicates a class member of type property

- Indicates a class member of type method

- Indicates a class member of type event

- Indicates a class member of type theme variable

- Indicates a class member of type theme mixin

- Indicates that the class, member, or guide is new in the currently viewed version

Class Member Quick-Nav Menu

Just below the class name on an API doc page is a row of buttons corresponding to the types of members owned by the current class. Each button shows a count of members by type (this count is updated as filters are applied). Clicking the button will navigate you to that member section. Hovering over the member-type button will reveal a popup menu of all members of that type for quick navigation.

Getter and Setter Methods

Getting and setter methods that correlate to a class config option will show up in the methods section as well as in the configs section of both the API doc and the member-type menus just beneath the config they work with. The getter and setter method documentation will be found in the config row for easy reference.

History Bar

Your page history is kept in localstorage and displayed (using the available real estate) just below the top title bar. By default, the only search results shown are the pages matching the product / version you're currently viewing. You can expand what is displayed by clicking on the button on the right-hand side of the history bar and choosing the "All" radio option. This will show all recent pages in the history bar for all products / versions.

Within the history config menu you will also see a listing of your recent page visits. The results are filtered by the "Current Product / Version" and "All" radio options. Clicking on the button will clear the history bar as well as the history kept in local storage.

If "All" is selected in the history config menu the checkbox option for "Show product details in the history bar" will be enabled. When checked, the product/version for each historic page will show alongside the page name in the history bar. Hovering the cursor over the page names in the history bar will also show the product/version as a tooltip.

Search and Filters

Both API docs and guides can be searched for using the search field at the top of the page.

On API doc pages there is also a filter input field that filters the member rows using the filter string. In addition to filtering by string you can filter the class members by access level, inheritance, and read only. This is done using the checkboxes at the top of the page.

The checkbox at the bottom of the API class navigation tree filters the class list to include or exclude private classes.

Clicking on an empty search field will show your last 10 searches for quick navigation.

API Doc Class Metadata

Each API doc page (with the exception of Javascript primitives pages) has a menu view of metadata relating to that class. This metadata view will have one or more of the following:

Expanding and Collapsing Examples and Class Members

Runnable examples (Fiddles) are expanded on a page by default. You can collapse and expand example code blocks individually using the arrow on the top-left of the code block. You can also toggle the collapse state of all examples using the toggle button on the top-right of the page. The toggle-all state will be remembered between page loads.

Class members are collapsed on a page by default. You can expand and collapse members using the arrow icon on the left of the member row or globally using the expand / collapse all toggle button top-right.

Desktop -vs- Mobile View

Viewing the docs on narrower screens or browsers will result in a view optimized for a smaller form factor. The primary differences between the desktop and "mobile" view are:

Viewing the Class Source

The class source can be viewed by clicking on the class name at the top of an API doc page. The source for class members can be viewed by clicking on the "view source" link on the right-hand side of the member row.

Sencha Touch 2.4


Getting Started with Sencha Touch

What is Sencha Touch?

Sencha Touch is a high-performance HTML5 mobile application framework. You can use Sencha Touch to produce a native-app-like experience inside a browser or in a hybrid shell. Sencha Touch supports Android, iOS, Windows Phone, Microsoft Surface Pro and RT, and BlackBerry devices.

Required Software

  1. Download and unzip Sencha Touch. You can unzip the software to any directory.

  2. Sencha Touch requires

    • Chrome
    • Safari
    • On a mobile device, you can use Chrome, Safari, or Internet Explorer 10 or 11.
  3. Java Runtime Environment version 1.7. Sencha Cmd is written in Java and needs the JRE to run. Note: If you are building an Android app using Windows, you must install the Java SDK. You can build an iOS app under Windows with the JRE, but not an Android app.

  4. Ruby to create the compiled CSS used by Touch.

    • Windows: Download Ruby from Download the RubyInstaller .exe file and run it.

    • Mac: Ruby is pre-installed. You can verify its presence with the ruby -v command.

    • Ubuntu: Use sudo apt-get install ruby2.0.0 to download and install Ruby.

  5. Sencha Cmd.
    Sencha Touch 2.3.1 requires Sencha Cmd 4.0.1, 4.0.2, or later. To check that you have correctly installed Sencha Cmd, type the sencha command, for example:

    $ sencha
    Sencha Cmd vn.n.n

If you are running the IIS web server on Windows, manually add application/x-json as a MIME Type for Sencha Touch to work properly. For information on adding this MIME type see this link.


Extract the Sencha Touch download zip file, which can be in any directory.

Start your web server. If using the Sencha Cmd web server, change directory to the location from which you want to serve your application, and start the Sencha Cmd web server with the sencha& web start command. To stop the web server, press CTRL+C, or open another command line window and type sencha web stop.

If you are using another web server such as XAMPP (a pre-configured Apache HTTP server), create an app directory where your web server expects to find apps. In the case of XAMPP, it's the XAMPP_install_dir/htdocs directory.

Generating Your First App

Now that you have Sencha Touch and Sencha Cmd installed, you can generate an application.

Choose or create a directory where your application will reside, change to that directory, and issue the following command:

$ sencha -sdk /path/to/touch generate app MyApp ./MyAppFolder


  1. /path/to/touch is the directory where you unzipped the Touch software.
  2. MyApp is the name you give your application.

This generates a skeleton Sencha Touch application namespaced to the MyApp variable and located in the current directory.

The skeleton app contains all the files you need to create a Sencha Touch application, including the default index.html file, a copy of the Touch SDK, the CSS file, and images and configuration files for creating native packages for your app.

You can verify if your application has generated successfully by opening it in a web browser. If you extracted the SDK to your webroot folder, navigate to http://localhost/MyApp. If you are using the Sencha Cmd web server, you can access served applications with the http://localhost:1841/ URL.

Note: If this command fails in Linux, re-install Sencha Cmd as a normal user versus installing with root privileges.

Explore the Code

The following listing provides a short description of each file and directory:

  • app - The directory containing the Models, Views, Controllers, and Stores for your app.
  • app.js - The main JavaScript entry point for your app.
  • app.json - The configuration file for your app.
  • index.html - The HTML file for your app.
  • packager.json - The configuration file used by Sencha Cmd for creating native packages for your application.
  • resources - The directory containing the CSS and the images for your app

Open app.js, the main entry point for your app, in your editor.

The launch function is the entry point to your application. In the default application, hide the application loading indicator, and create an instance of our Main view and add it to the Viewport.

The Viewport is a [[touch: Ext.layout.Card Card Layout]] to which you can add application components. The default app adds the Main view to the viewport so it becomes visible on the screen.

Look at the code inside the Main view.

Open app/view/Main.js in your code editor and change a title line to:

title: 'Home Tab'

Then change another line as follows:

title: 'Woohoo!'

Also, change lines as follows:

html: [
    "I changed the default **HTML Contents** to something different!"

Refresh the app in your browser to see the effects of your changes.

Next Steps

Follow the First Application guide, which builds on this guide, and helps you create a simple but powerful app in around 15 minutes.

Note: As a good practice, when you create an application, keep a copy of your app.js file as Sencha Cmd also updates this file.

Sencha Touch 2.4