Book Image

YUI 2.8: Learning the Library

Book Image

YUI 2.8: Learning the Library

Overview of this book

The YUI Library is a set of utilities and controls written in JavaScript for building Rich Internet Applications, across all major browsers and independently of any server technology. There's a lot of functionality baked into YUI, but getting to and understanding that functionality is not for the faint of heart. This book gives you a clear picture of YUI through a step-by-step approach, packed with lots of examples.YUI 2.8: Learning the Library covers all released (non-beta) components of the YUI 2.8 Library in detail with plenty of working examples, looking at the classes that make up each component and the properties and methods that can be used. It includes a series of practical examples to reinforce how each component should/can be used, showing its use to create complex, fully featured, cross-browser, Web 2.0 user interfaces. It has been updated from its first edition with the addition of several chapters covering several new controls and enriched with lots of experience of using them.You will learn to create a number of powerful JavaScript controls that can be used straightaway in your own applications. Besides giving you a deep understanding of the YUI library, this book will expand your knowledge of object-oriented JavaScript programming, as well as strengthen your understanding of the DOM and CSS. The final chapter describes many of the tools available to assist you the developer in debugging, maintaining, and ensuring the best quality in your code. In this new edition, all the examples have been updated to use the most recent coding practices and style and new ones added to cover newer components. Since the basic documentation for the library is available online, the focus is on providing insight and experience.The authors take the reader from beginner to advanced-level YUI usage and understanding.
Table of Contents (18 chapters)
YUI 2.8 Learning the Library
About the Authors
About the Reviewers

The Menu classes

This component, much like the Container that we looked at in the earlier chapter, is made up of a small family of different types of menu. There is a range of different classes that work together to bring the functionality of the different types of menu to you.

The three main classes behind the Menu family are:

  • YAHOO.widget.Menu

  • YAHOO.widget.ContextMenu

  • YAHOO.widget.MenuBar

Menu is a subclass of Overlay, part of the Container family, and the other two are subclasses of Menu. Just as each TabView is made of several Tabs, each kind of Menu has a different class for its items:

  • YAHOO.widget.MenuItem

  • YAHOO.widget.ContextMenuItem

  • YAHOO.widget.MenuBarItem

ContextMenuItem is simply an alias for MenuItem created just for the sake of symmetry. All types of menu items can have a Menu as a submenu; neither ContextMenu nor MenuBar can be nested in a menu item, they are only good at the outermost level.

All the menus are coordinated by YAHOO.widget.MenuManager, which...