Re: [g-a-devel] How does at-spi communicate with gail ??

[Vamsi <krishna vamsi wipro com>]

Hi Bill Haneman,

Thank You for the Fast response and sorry for the late reply :-) ,  i 
had to dig into the code to get some understanding....and putting the 
same in words...

1.  When export GTK_MODULES=gai:atk-bridge
From Gail :
Module gets initialized with gtk_module_init of the gail, this will in 
turn call the gail_accessibility_module_init which will register with 
the registry for what widget or what widget type  which function to be 
called with the help of

atk_registry_set_factory_type( get_the_registry, widget_type, 
function_associated)

From atk-bridge:
Module gets initialized with gtk_module_init, this will call the 
atk-bridge_init and this will initialize the bonobo and registers the 
applications and activates the event listeners.

Bonobo inturn activates the at-spi.

I have some vague idea here.. please correct me if i'm wrong
Even listeners are the main interface to interact with the gail, these 
listeners are connected with spi functions which converts the ATK 
objects into Accessible objects and sends them to the at-spi throguh 
bonobo/corba, i mean Accessible objects are sent accross to at-spi with 
like corba objects.

Thank You.


-Vamsi





-Vamsi


Bill Haneman wrote:

> Hi Vamsi:
>
> The atk-bridge contains the answer to both of your questions.  It is
> both the service which adapts the in-process ATK interfaces (implemented
> by gail) to the out-of-process AT-SPI interfaces, exported via CORBA
> IPC.  If you look closely at at-spi/atk-bridge/bridge.c, you will see
> where the connections take place.
>
> It is also the code which registers each application with the
> at-spi-registryd Registry service, when the application initially starts
> up, via gnome_accessibility_module_init().
>
> Here's a process-space diagram showing how apps, the AT-SPI registry,
> and assistive technologies communicate:
>
> http://developer.gnome.org/projects/gap/tech-docs/SPIBlockDiagram.png
>
> regards
>
> Bill
>
> On Tue, 2006-03-14 at 22:58, Vamsi wrote:
>  
>
> > Hi List,
> >
> > I'm trying to understand how the accessibility works !! i have some 
> > doubts regarding the same.
> >
> > 1. How does the at-spi, atk-bridge and gail communicate with each other.
> >    do they corba(bonobo) to communicate, if yes i have not seen any 
> > corba related code in gail then how it is passing the info to at-spi 
> > along with atk-bridge ??
> >
> > 2. When we launch an application on the desktop how does it registers 
> > itself with at-spi registryd. how the communication is getting 
> > transferred from application to at-spi ??
> >
> > Thank You.
> >
> > -Vamsi
> >
> >
> >
> > _______________________________________________
> > Gnome-accessibility-devel mailing list
> > Gnome-accessibility-devel gnome org
> > http://mail.gnome.org/mailman/listinfo/gnome-accessibility-devel
> >    
>
>