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
Credits
About the Authors
About the Reviewers
Preface

Tree-like structures with the TreeView Control


Back in Chapter 3 when we looked at the Dom utility, we saw the DOM Inspector provided by Firefox (under the heading DOM concepts). DOM viewers are an excellent example of a useful tree-like representation of a series of objects (in that example the objects making up a web page), and the TreeView control can be used to create tree-like structures that are just as useful. File system explorers, such as Windows Explorer or the Finder application on the Mac, are also common examples of tree structures at work.

This component is extremely versatile and provides essential methods for adding and removing nodes programmatically, as well as loading node data dynamically. It also has a set of default behaviors that can be manipulated to give you the effects you want.

It even allows you to override the default behavior of allowing several parent nodes to be expanded at once in order to use the tree control as a navigation menu, and has the capability to...