When using QAccessibleEvents of types QAccessible::Selection,
QAccessible::SelectionAdd and QAccessible::SelectionRemove,
Qt (internally) also always uses QAccessbibleEvent::setChild to
set the child that has been (un)selected.
As a consequence, the interface retrieved using
QAccessibleEvent::accessibleInterface here is not the
a11y object in which the selection has changed, but
the child, so notifying about a change to its selected
state (as happens here in the AT-SPI adapter) is in line
with that.
For AT-SPI, assistive technology (like the Orca screen reader)
often reacts to the SelectionChanged event on the object
managing the selection, so send a corresponding event
for the parent of the (un)selected child as well.
(Besides the lack of support for the AT-SPI Selection
interface - s. QTBUG-105909 - the fact that this event
wasn't sent previously e.g. turned out to be one reason
for the Orca screen reader not announcing selected cells in
the Qt 6 based UI variant of LibreOffice Calc.)
Change-Id: Icc8b9a7ecc77bc5394fd1ab4f8163caed951ba86
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
063344c8b9