Re: [g-a-devel] Finding if AT client is active

[Ashu Sharma <ashutoshsharma gmail com>]

Thanks a lot for the inputs Peter, Bill and Samuel.

Checking the gconf key seems to solve the problem. If a user starts
gnopernicus when the program is already running, the user is anyway
warned that accessibility support is not enabled and for the change to
take effect, the user must logout and log back in. So, if the program
checks during its initialization whether that key is true, it should
be ok.

Thanks again,
Ashutosh


On Wed, 15 Dec 2004 11:47:55 +0000, Bill Haneman <Bill Haneman sun com> wrote:
> The real issue IMO is whether 'AT support' is turned on or not.  This is
> what the gconf key, /desktop/gnome/interface/accessibility is for.  If
> this gconf key is set to "true", you should assume that assistive
> technologies are or may be listening, and your application should
> provide all necessary information under these conditions.
> 
> Because we have a 'real' API-based AT setup, we must rely on these api
> "contracts" for good behavior, so if the system says "AT support is ON",
> your application should honor that setting.
> 
> There is another API which can provide some information about running
> assistive technologies (the 'LoginHelper' API), but it is not guaranteed
> to tell you about all AT applications, just those which advertise their
> need for I/O services during user authentication (i.e. unlocking a
> screen lock, logging into a secure server, etc.).  But this API doesn't
> tell you what kind of AT is running, it only tells you in broad strokes
> what kinds of system devices it needs access to (i.e. XServer, keyboard,
> pointing device, XInput devices, needs to post windows, etc.).  I don't
> think that it would not be useful/appropriate to your situation.
> 
> regards,
> 
> - Bill
> 
> Samuel Thibault wrote:
> 
> >Le mer 15 déc 2004 à 01:15:35 +0530, Ashu Sharma a tapoté sur son clavier :
> >
> >
> >>Is it possible to find out programmatically if an AT client is
> >>currently running on the system (by the same user?) (something similar
> >>to SystemParametersInfo(SPI_GETSCREENREADER) on Windows)?
> >>
> >>There's a lot of initialization and processing that can be saved in my
> >>program if there is no AT client to use that information.
> >>
> >>
> >
> >Warning: the AT client may be launched after your program.
> >
> >Regards,
> >Samuel
> >_______________________________________________
> >Gnome-accessibility-devel mailing list
> >Gnome-accessibility-devel gnome org
> >http://mail.gnome.org/mailman/listinfo/gnome-accessibility-devel
> >
> >
> 
>