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Java Swing, 2nd Edition
book

Java Swing, 2nd Edition

by Marc Loy, Robert Eckstein, Dave Wood, James Elliott, Brian Cole
November 2002
Intermediate to advanced
1280 pages
38h 26m
English
O'Reilly Media, Inc.
Content preview from Java Swing, 2nd Edition

Chapter 25. Programming with Accessibility

Accessibility is a Java feature that allows you to extend your programs by interfacing an application’s components with assistive technologies that have special permission to use them. Assistive technologies are, in the narrowest sense, specialized tools that people can use to assist in interacting with your application; examples include voice-recognition and audio output. In a broader sense, however, assistive technologies can be robust application suites that can assist just about anybody with anything.

It helps to think of accessibility as a two-sided conversation. This conversation takes place between an assistive technology and the “accessibility-friendly” components of applications. Assistive technologies are quite powerful: Java grants them access to all the components in the virtual machine that they can interface with, as well as the ability to interface with the windowing event queue. The latter gives an assistive technology the ability to monitor graphical events. The former means that an assistive technology can directly interact with the GUI widgets of one or more applications quickly and easily, without disrupting the application beneath it.

In order for components to interface with assistive technologies, they must implement special “accessible” interfaces. (The Swing components already implement these interfaces.) There are six unique interfaces for exporting accessible functionality: one each for actions, component properties, ...

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Publisher Resources

ISBN: 0596004087Errata Page