September 1998
Intermediate to advanced
1258 pages
42h 57m
English
Content preview from Java Swing
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Other Accessible Objects
Before going further, there are several simple objects in the
Accessibility package used by
AccessibleContext that we should discuss in more
detail.
AccessibleState
Each accessible component can have one or
more states associated with it. An assistive technology can query
these states at any time to determine how best to deal with the
component. The accessible states can only be retrieved, however, and
not set. There are two classes that the Accessible
package uses to handle states: AccessibleState and
AccessibleStateSet.
The AccessibleState class contains an enumeration
of static objects that define states that any accessible component
can have. Note that a component can be in more than one state at any
time. A list of the possible states that an accessible object can be
in, along with a brief description of each, is shown in Table 25.3.
Table 25-3. AccessibleState Constants
|
State |
Meaning |
|---|---|
|
|
The window, dialog, or frame is the active one |
|
|
The object, such as a button, has been pressed but not released, and the mouse cursor is still over the button |
|
|
The object is busy processing and should not be interrupted |
|
|
The object is checked |
|
|
The object, such as a node in a tree, is collapsed |
|
|
The object supports any form of editing |
|
|
The object is enabled |
|
|
The object, such as a node in a tree, can report its children |
|
|
The object, such as a node in a tree, is expanded ... |
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.