[g-a-devel] children-changed signals in at-spi2

[Li Yuan <Li Yuan Sun COM>]

Hi Mark,

Ginn found a bug today that when Firefox created a new window, the
window can not be seen in Accerciser. We think the problem might be that
the "index" field of "children-changed:add" signal is missing. Actually
it is not missing, it is 0.

So I checked the code and find atk-bridge does not emit
"children-changed" signals anymore. Instead it emits "UpdateAccessible".
And on pyatspi2 side, the old cache and the new cache are compared to
determine if this is an add or a remove and send "children-change:add"
or "children-change:remove" to ATs. (Please correct me if I am wrong.)

This comes up with two questions:

1. In at-spi2-core/xml/org.freedesktop.atspi.Accessible.xml,
"object:children-changed" is one of the signals of accessible. Now
atk-bridge doesn't emit it anymore. This can be a problem if we develop
another language bindings used by ATs.

2. The index information is not passed to ATs. So there may be bugs if
ATs rely on the index number (or the AtkObject which is the second
arguments of children-changed signal). 

So is it possible to emit "children-changed" signal in atk-bridge and
use a separate listener in pyatspi2 to listen it? 

Thanks,
Li