Learning Ext JS 3.2 by Shea Frederick

By Shea Frederick

The booklet presents lots of enjoyable instance code and screenshots to steer you thru the production of examples to help with studying. by way of taking a chapter-by-chapter examine each one significant element of the Ext JS framework, the booklet enables you to digest the on hand positive factors in small, simply comprehensible chunks, permitting you to begin utilizing the library on your improvement wishes instantly. This publication is written for internet software builders who're acquainted with HTML yet could have little to no event with JavaScript program improvement. while you're beginning to construct a brand new internet program, or are re-vamping an latest internet software, then this ebook is for you.

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Learning Ext JS 3.2

The booklet presents lots of enjoyable instance code and screenshots to steer you thru the construction of examples to help with studying. through taking a chapter-by-chapter examine each one significant point of the Ext JS framework, the publication permits you to digest the to be had gains in small, simply comprehensible chunks, permitting you to begin utilizing the library to your improvement wishes instantly.

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The main goal of this chapter was to get Ext JS installed and working, so we can start creating some really sweet widgets and web applications. In the following chapter we will learn how to create more functional widgets, and how to configure them to behave exactly as we require. [ 25 ] The Staples of Ext JS In this chapter, we will start to use and interact with Ext JS widgets for the first time, by creating a series of dialogs that interact with each other, the user, and the web page. We will be using the onReady, MessageBox, and get functions to learn how to create different types of dialogs and modify HTML and styles on our page.

Here is how our example now looks in a browser: This displays what appears to be a very minimal dialog, but if we start clicking on things, the built-in functionality of Ext JS becomes apparent. The dialog can be dragged around the screen by grabbing the title bar, just like the dialog in a typical desktop application. There is a close button built–in, and pressing the Escape key when the dialog has focus, or clicking on the Cancel button will close the dialog. What just happened? onReady: This was covered in the previous chapter.

Get: This function accesses and manipulates elements in the DOM Meet the config object In the examples of this chapter, we will be configuring our widgets using what's called a config object. This is the primary way to get Ext JS Components to look and act the way we need. The config objects provide the specification of the different options that are available for the class that is being used. The Staples of Ext JS The old way We used to call functions with a pre-determined set of arguments. This means that we had to remember the order of the arguments every time the function was used.

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