GtkMenuItemAccessible was assuming that an accel label is
always the immediate child of a menu item. It also did not
deal with manually set accels. Fix both of these.
https://bugzilla.gnome.org/show_bug.cgi?id=721086
This commit exposes the get_type() functions and standard
headers for accessible implementations. This makes it possible
to derive from the GTK accessible implementations without
GType magic tricks. This is necessary, because we require the
a11y type hierarchy to be parallel to the widget type hierarchy.
So, if you derive a widget and need to adjust its a11y implementation,
you have to be able to derive its accessible implementation.
This commit probably exposes more than is absolutely necessary,
it also exposes accessibles of widgets that are unlikely candidates
for deriving from.
Move instance fields to a private struct, in preparation
for installing a11y headers.
This also required removing access to GtkWidgetAccessible innards
from several accessible implementations.
Move instance fields to a private struct, in preparation
for installing a11y headers.
This also required removing access to GtkContainerAccessible innards
from the GtkMenuItemAccessible implementation.
