I have to agree with Andres. WM_GETOBJECT is not solely used by AT. Rich Schwerdtfeger CTO Accessibility Software Group
Andres Gonzalez
<[email protected]
om> To
Sent by: "[email protected]"
accessibility-ia2 <[email protected]>, James Teh
[email protected] <[email protected]>, IAccessible2
nuxfoundation.org mailing list
<[email protected]
dation.org>
05/25/2010 08:46 cc
AM
Subject
Re: [Accessibility-ia2] screen
reader present flag
WM_GETOBJECT is NOT a reliable way of detecting AT either, since it may be
triggered by apps and even device drivers that don't have anything to do
with AT, so you are guarantied false positives even with the best
heuristics. I'm very interested in developing a reliable handshake
mechanism with AT, and would love to hear from others with ideas/proposals
on this respect. Perhaps we can take this task for the next edition of IA2
in this list, or by a subgroup of interested parties, and bring back a
concrete proposal to the general group.
Thanks,
--Andres.
From: [email protected] [
mailto:[email protected]] On Behalf Of
Pete Brunet
Sent: Monday, May 24, 2010 4:18 PM
To: James Teh
Cc: IAccessible2 mailing list
Subject: Re: [Accessibility-ia2] screen reader present flag
Thanks Jamie, I'll have to check with the architects to see if they would
have any issues with blocking. If I can block then I might also be able
to lazily call into the secondary thread to build the tree as needed.
-Pete
===
James Teh wrote:
On 25/05/2010 8:37 AM, Pete Brunet wrote:
Thanks Jamie, [using WM_GETOBJECT to dynamically enable
accessibility] may be a problem for the case where the app has
multiple threads and a secondary thread needs to be called by
the window
proc to participate in the building of the accessibility tree.
Is it
acceptable to block the UI thread?
I don't see why this is any different to creating the tree in the
same
thread. Either way, it will block the UI thread, as the WM_GETOBJECT
message needs to return the requested accessible object. Can you
shorten
the setup time by creating parts of the tree lazily only when
requested?
Jamie
_______________________________________________
Accessibility-ia2 mailing list
[email protected]
https://lists.linux-foundation.org/mailman/listinfo/accessibility-ia2
<<inline: graycol.gif>>
<<inline: pic19511.gif>>
<<inline: ecblank.gif>>
_______________________________________________ Accessibility-ia2 mailing list [email protected] https://lists.linux-foundation.org/mailman/listinfo/accessibility-ia2
