expander: Reinstate rtl allocation behavior

In rtl mode, we must not just reverse the children,
but also allocate from the right. Use the newly introduced
box gadget api to achieve this.

https://bugzilla.gnome.org/show_bug.cgi?id=762945

diff --git a/gtk/gtkexpander.c b/gtk/gtkexpander.c
index f6cea5c188c7ad2308b2a8e21bb3bffc6ffe1e09..3f32da4f85acae2279cd3d9a0491fe8bb736a9a1 100644 (file)
--- a/gtk/gtkexpander.c
+++ b/gtk/gtkexpander.c
@@ -787,6 +787,9 @@ gtk_expander_direction_changed (GtkWidget        *widget,
   gtk_box_gadget_remove_gadget (GTK_BOX_GADGET (priv->gadget), priv->title_gadget);
   gtk_box_gadget_insert_gadget (GTK_BOX_GADGET (priv->gadget), 0, priv->title_gadget, FALSE, FALSE, align);
 
+  gtk_box_gadget_set_allocate_reverse (GTK_BOX_GADGET (priv->title_gadget),
+                                       gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL);
+
   GTK_WIDGET_CLASS (gtk_expander_parent_class)->direction_changed (widget, previous_direction);
 }