Book Image

Backbase 4 RIA Development

Book Image

Backbase 4 RIA Development

Overview of this book

Backbase is a very powerful and complex JavaScript library, with many user interface components to help make web development easier. It allows the development of Rich Internet Applications (RIA) that run within all major browsers but its powers and complexity mean that the choice of component can be overwhelming. Understanding when and how to use the right component might not always be straightforward. This book makes that easier. This is a practical book that teaches you how to use the Backbase Client Framework effectively, with a complete overview and many examples. A core developer of the framework puts the technologies used into a wider perspective of existing web standards and a seasoned software architect explains why XML-based UI definition produces better web applications. The transparent use of AJAX technologies, for example to submit forms, or to retrieve updates for data grids, can be taken for granted with the Backbase framework. Packed with examples, the book shows you how to get the most from the library of UI components, and then extend the library with its own custom language. With this book in hand, it is easy to enable AJAX within your web application. You will be able to use the Backbase framework effectively, from basic applications to complex, custom-defined UI components. This book contains a complete overview of all the UI libraries available within the Backbase framework and shows examples for each element described. The Backbase framework offers an innovative Tag Definition Language (TDL), which allows developers to create new UI components that can be used as XML elements, in the same way as using the built-in GUI library. Using TDL brings considerable development advantages, and this book explains how. Significant attention is also given to architectural aspects of designing a web-application, showing sample applications using a model-view-controller approach.
Table of Contents (16 chapters)
Backbase 4 RIA Development
About the Authors
About the Reviewers

Widget event handling

Events, such as mouse clicks or DOM mutation events can be handled for TDL widgets in a way very similar to that of XEL handlers attached to widget instances on a page. The handlers specified for TDL widget definitions will be there for every instance of that widget. Any XEL event handler that may be specified on a specific widget will be called before any handler defined in TDL. The TDL event handlers reside in the TDL namespace instead of the XEL namespace.

Event handlers allow you to respond to events that occur on a widget. Code within the handler is executed when the specified event type is triggered.

The handler tag

The handler tag describes an event that you want to handle for the widget and what functionality to execute when that event is triggered. The handler tag has these attributes:




Allows you to control the event flow. It defines the propagation behavior on a single node (cancel, perform).


The name of event...