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The detail strings weren't in use anymore, and the state
argument is now a GtkStateFlags. GtkToggleButton has been
updated as well.

GtkStyleContext API is used instead.

prepare_run must have been called before draw_shape, so we can avoid
fiddling the the (deprecated) style and state and just use the color
alredy set on the renderer.

https://bugzilla.gnome.org/show_bug.cgi?id=639079

GtkTextView does not support them anymore.

https://bugzilla.gnome.org/show_bug.cgi?id=639030

Fold gail_misc_add_to_attr_set into the only function calling it, which
avoids a useless big "switch" and results in much less code.

https://bugzilla.gnome.org/show_bug.cgi?id=639030

Document this behavior and add annotations.

Reported by Andrew Cowie in
https://bugzilla.gnome.org/show_bug.cgi?id=638963

GtkProgressBar:show-text, GtkScrolledWindow:min-content-width/height
are new properties in 3.0.

This makes XEmbed work properly again. Only event->key.group
and is_modifier are left blank at the moment. Exposing the
necessary XKB bits should be considered, but it's not urgent
for the current usecases.

This function is useful to figure out whether the tree view is "blank"
at a given location.  For such locations you might want to popup a
custom popup menu, clear the current selection or start rubber banding.
In the future, we are planning on updating GtkTreeView's user
interactions to take advantage of this new function.

Part of bug 350618.

The fact that GtkCellLayout was checking "if (gtk_cell_layout_get_area (layout))"
and executing code contitionally from the apis instead of simply falling
back to the default implementation for these things was causing problems
in language bindings such as gtkmm... Regardless, the implementation
is cleaner this way too.

Based on a patch from Cyril Brulebois <kibi@debian.org>

https://bugzilla.gnome.org/show_bug.cgi?id=612918

Fixed a typo when checking if the heirarchy toplevel is a toplevel
before firing the hierarchy-changed signal.

Showing the window causes it to try to grab focus, this causes problems
when embedded toplevels run through dispose cycles.