Greetings,
 
I am working on making a Python application accessible by creating ATK
objects corresponding to the GUI objects of the application.  The Python
app is under development and I recently fetched a new version of the
source and it caused my ATK interface to stop working.  I've tracked it
down to a single line in the Python app:
 
import gtk
 
As I mentioned in a previous posting, my implementation of
add_global_event_listener() in the AtkUtilClass prints the name of the
event for each listener added.  If I initialize the ATK system:
 
before "import gtk":
1. The usual list of events is printed
2. My AT-SPI clients sees the ATK object with role ATK_ROLE_APPLICATION
that my ATK code defines.
3. The toolkit name (obtained by my AT-SPI client from
AccessibleApplication_getToolkitName) is "PAPI" - the ATK tookit I'm
using
 
after "import gtk":
1. no list of events is printed
2. the application object is not mine, it has name "atkapplication.py"
3. the toolkit name is "GAIL"
 
Marcus von Appen has documented "Wrapping ATK" here:
http://www.sysfault.org/atk.html.  It looks to me like the first toolkit
to perform this wrapping is the one the app uses.  Is this limitation
documented somewhere?    When my AT-SPI client starts exploring the
accessible object tree rooted at the application object, it will see
either the tree created by GTK or the tree create by PAPI, but not both.
 
I forsee a problem when I start trying to interface to Cally, Clutter's
accessibility implementation.  Sure enough, this is a problem that
Alejendro Iglesias, the author of Cally, has identified, see
http://bugzilla.o-hand.com/show_bug.cgi?id=1738).  Cally is a toolkit
just like GAIL (see page 12 of this PDF:
http://personales.igalia.com/apinheiro/files/cally_guadec_2009_slides.pd
f.gz).  If I have a GTK app that is accessible (GAIL, ATK) and I add
Clutter along with its accessibility (Cally, ATK) to my app, only one of
Cally or GAIL will successfully connect to ATK.  I do not see a way for
the two toolkits to cooperate.
 
-Sam
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