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Re: [platform-swt-dev] SWT_AWT and Accessibility

Hi Richard,

Thats very interesting news..
So if im understanding correctly.. because swing would use the java access
bridge and swt uses an alternative method.. it basically confuses any AT
application interogating the app.
Two implementations at the same time is generally not supported?

If so this would leave my development team with only really one option..
change our swing panels to swt composites to gain AT support.

Can you confirm that i have understood this correctly.


Thanks,
Jamie M. Guillemette
IT Solutions Developer
TD Enterprise Technology Solutions
275 Dundas Street, 11th Floor, London
(519) 663-1952



                                                                           
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It still makes sense to have a test case and bug report to track this issue
and confirm that it does not work.


                                                                           
 Richard Schwerdtfeger                                                     
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               g>                          and Accessibility               
                                                                           
                                                                           
                                                                           
                                                                           
                                                                           
                                                                           
                                                                           





Swing applications, currently, interoperate with assistive technologies
through the Java Acces Bridge. Assistive technologies access Swing
applications through a special Java access bridge dll provided by Sun. This
is not how assistive technologies access Eclipse applications. Eclipse
applications interoperate with assistive technologies, on Windows, using
MSAA, offscreen modeling (screen scraping), and propietary APIs used by
ActiveX plug-ins. Even if you installed the bridge, this would be
problematic for ATs as they would not be able to handle the mix between the
access bridge dll and MSAA.

We have developed an accessibility API extension to MSAA, called
IAccessible2 which when combined with MSAA will give you the same level of
rich interoperability as Java. We hope to implement support for it in
Eclipse along with Linux accessibility support. Sun would also need to do a
mapping from the Java Accessibility API ( referred to by Jamie) and
MSAA/IAccessible2. This would provide the consistent framework you desire.
Sun has not made that investment at this time. IAccessible2 should be fully
supported by JAWS and Window-Eyes in their next releases.

So, it is recommended that Swing not be used in Eclipse applications if you
would like them to be accessible. If possible, we recommend using an
existing SWT control.

Rich


Rich Schwerdtfeger
Distinguished Engineer, SWG Accessibility Architect/Strategist
Chair, IBM Accessibility Architecture Review Board
blog: http://www.ibm.com/developerworks/blogs/page/schwer
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Can you confirm that it is working properly running a small Swing only
example? If so, please create a bug report with a stand alone snippet.
                                                                           
 jamie.guillemette@xxxxxx                                                  
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                                                      SWT_AWT and          
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Hi All,

Im trying to find out if the SWT_AWT bridge allows accessibility data to
flow from Swing components back to SWT and out to Accessibility
applications.

I have an eclipse application that uses swing for many views. The SWT_AWT
bridge is used to allow the swing panel to be embedded in the views.

Our client relies on Jaws a screen reader application.

In Swing we would call the method getAcessibleContext().setName()  or
setDescription()  on any swing component. This provides the details the
screen reader needs
to have to work properly.

So far my intial attempts at making this work within our eclipse plugin
have failed. Our SWT components / frames work perfectly.

Does anyone know :

a) is accessiblity supported in swing panels via SWT_AWT?

b) if not is there a best practice work around?



Thanks,
Jamie M. Guillemette
IT Solutions Developer
TD Enterprise Technology Solutions
275 Dundas Street, 11th Floor, London
(519) 663-1952


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