Re: More on JFW support for MSAA properties...
- From: Doug Lee <dgl@xxxxxxxx>
- To: jfw@xxxxxxxxxxxxx
- Date: Sat, 17 Jul 2004 20:57:21 -0400
Belated answer to this; I rarely manage to keep up with this list.
I'll quote your questions, then answer them.
On Thu, Jul 01, 2004 at 08:13:15AM -0400, Mike Paciello wrote:
> 1. Does JFW support reading the MSAA PROPID_ACC_VALUE property?
JAWS announces accValue on a case by case basis I think, but yes, it
does understand and access that property.
> 2. In a C# (C Sharp) Application, JAWS is not reading the contents
> of the ComboBoxes like it does in C++ Applications. It reads "Zero
> Items", when it should read something like "1 of 3". Why is this?
I'd like to hear from you directly if you get an answer to this,
because mine is a guess. The standard structure for a combo box in
MSAA is this (I assume the MSAA docs from Microsoft bear this out; I'm
going by what I've seen in the wild more than from my memory of that
appendix describing how to implement each control type):
Level 1: A Role_System_ComboBox object with three descentants. The
descendants can be reached via child IDs 1, 2, and 3, or by
accNavigate calls (except that it is common for accNavigate from the
Open button to the list not to work when the list is closed, and thus
invisible). Per usual for a control, there is actually a Window
object wrapping the ComboBox object.
Level 2: Three items: a Role_System_Edit object, an Open button, and
a List. The list is actually a window object whose client is a list
with items under that. The window tends to have the
State_System_Floating bit set. I believe it is common for the edit
and button objects NOT to be wrapped by a Window object.
I don't know if JAWS' handling of combo boxes is based solely on the
MSAA structure, but I consider it a decent guess, and thus recommend
that developers follow that model carefully.
> 3. In a C# ((C Charp) Application with ListBox Controls, JAWS does
> not read the Accessibile Name or the Accessible Description when you
> enter the control. Is that expected behavior?
accDescription is not usually announced automatically by JAWS, but
accName is different. I assume you mean accName for the list itself,
not the items under it, for which accName is the place to put their
contents. accName for the actual list object is its name. I think
you're saying JAWS doesn't announce that when you tab to it. Did you
perchance try making the actual window name equal to the accName value
also?
> Finally, we have noticed that JAWS supports the Microsoft Calendar
> control (SysMonthCal32), but Window Eyes does not. Or, at least we have
> yet to get it to work. Has anyone on this list noticed this behavior on
> Window Eyes? And how have you dealt with it. The calendar control is
> built into MS Outlook Calendar.
I can't answer that one, but it's interesting that you say JAWS
supports it. Once upon a time I wrote a set of scripts for that
control because I found JAWS' support lacking in a few areas. That
was years ago though, and I haven't had to mess with them since.
> Thanks in advance for your feedback. To date, we haven't been able to
> extract helpful information from any Help, Documentation, Microsoft,
> MSDN, or any of the public listservs.
I suggest a better list for this type of question, or at least for the
ones up to but not including the final Window-Eyes question, would be
the JAWSScripts list. I believe there's a link for that at
www.blindprogramming.com. I keep up daily with that list, but I think
today is the first day in nearly a month that I've looked at this one.
The JAWSScripts list sees more programmer types I think. Someone else
also suggested Program-L I think, and that's not a bad idea either.
Good luck, and I'm glad you came to us to ask how to proceed.
--
Doug Lee dgl@xxxxxxxx http://www.dlee.org
Bartimaeus Group doug@xxxxxxxxxxxx http://www.bartsite.com
No one alive is beyond hope; every second of life is a chance.
(08/29/02)
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