The hypothetical widget that needs to clone ATContext instances
because it needs to control the accessible role post-construction is
really GtkModelButton.
Fixes: #3342
Some widgets might want to override GtkAccessible and create their own
context in order to control the accessible role post-construction time.
To avoid explicitly copying the existing state over from the original
ATContext to the new one, we need a way to clone the context's state
from inside the ATContext itself.
Using GList is a bit lame, and makes the API more complicated to use
than necessary in the common case.
The only real use case for a GList is gtk_widget_add_mnemonic_label(),
and for that we can use the GValue-based API instead.
Fixes: #3343
The accessible-role property in GtkWidget has three possible targets:
- the :accessible-role of a GtkATContext, if realized
- the accessible_role field of GtkWidgetPrivate
- the accessible_role field of GtkWidgetClassPrivate
When we set the accessible role of a widget using the GObject property
mechanism, we want to either set the GtkWidgetPrivate.accessible_role
field, if there's no ATContext *or* if the ATContext is not realized.
Conversely, when we get the accessible-role property we want to have a
series of fallbacks in place:
- if GtkAccessible.get_at_context() returns an ATContext, and that
ATContext is realized, return the :accessible-role of the context
- if GtkWidgetPrivate.accessible_role is not WIDGET, return the
stored accessible role
- return GtkWidgetClassPrivate.accessible_role
This should help catch the case of getting the accessible role of
widgets that override GtkAccessible.get_at_context(), like
GtkModelButton.
See: #3342
Use a single environment variable for everything:
- select the ATContext implementation
- select the test ATContext
- disable ATContext entirely
We use the same pattern as GSK_RENDERER, GTK_DEBUG, etc.
The documentation needs to be updated to include the environment
variable.
The GtkPlacesOpenFlags enum is only used in private
API, so move it to private headers. Since we still need
a GType for it, add gtkplacessidebarprivate.h to the
headers we use for generating private enum types. In turn,
this registers the other private enums in that header, so
take the opportunity to fix their naming, and use the
generated types for the corresponding sidebarrow properties.
Fixes: #3337
On desktop GL, GL 1.5 or GL_ARB_occlusion_query is required to get the
glGenQueries() etc. symbols. This isn’t the case on GLES, where they
are provided by GL_EXT_occlusion_query_boolean, and more importantly
have never been made core.
This patch allows gtk4-demo to start when GDK_DEBUG=gl-gles is set, on
my Mali 400 MP running the Lima driver from Mesa.
