Document accessibility questions
Document accessibility questions
- Subject: Document accessibility questions
- From: Ray Fischer <email@hidden>
- Date: Thu, 10 Feb 2005 15:38:14 -0800
How much of a document should be made immediately accessible?
Suppose I have some document that's is divided into text chunks of some
size (call
them paragraphs) and the chunks are children of the window they're
displayed in.
Some text blocks will be visible and some text blocks that may be
scrolled out of view.
Should offscreen text be returned as accessible UI objects or should I
present
only text which the user can interact with?
If the former, then what happens when the document is 50,000 pages?
That would
result in returning millions of UI objects as children of the window.
Omitting invisible UI objects seems an obvious solution. When asked
what the children
of the window are, just return those blocks that are visible. What
happens when
there's a scroll? Send a value-changed notification for the window so
that a new
list of children can be read? That could impact smooth scrolling in
bad ways, but
the notification could be sent only when scrolling stops.
Has anyone thought about these issues and how they might affect
VoiceOver?
My inclination is to do as described just above, but is there something
I'm missing?
Is there a "correct" way of making a large document accessible?
----
Ray Fischer
Adobe Systems
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