This is the interface for GtkWidgets that can be associated with an
action on a GtkAppicationWindow or associated GtkApplication.
It essentially features 'action-name' and 'action-target' properties
with some associated convenience API.
This interface is implemented by GtkButton and GtkToolButton.
https://bugzilla.gnome.org/show_bug.cgi?id=667394
We add the app-menu and menubar public APIs to GtkApplication while
leaving the implementation in GApplication.
The actual implementation will be moved soon.
Deal with remote action invocations correctly by implementing
GRemoteActionGroup in the same way that GApplication does and pushing
remote activations through the before/after_emit functions of the
GApplication associated with the window.
This is the last part of getting the threading situation right.
https://bugzilla.gnome.org/show_bug.cgi?id=665737
We want accelerators to work, even if the menus are not shown
locally, so we can't rely on the GtkMenu code to set them up
for us. Currently, this code only installs accelerators when the
window is realized.
Put this in a separate file and substantially refactor it.
Move handling of submenu creation into gtkmodelmenuitem where it
belongs.
Improve our handling of when to show separators or not.
This GtkMenuItem subclass (and GActionObserver implementation) contains
all the knowledge necessary for converting a GMenuModel item description
into a GtkMenuItem.
Remove much of the code that used to do this from
gtkapplicationwindow.c.
This is a GtkWindow subclass that "application windows" will use. Each
is associated with a GtkApplication, has the ability to show menus and
will have its own associated set of actions.
