docs: add Gtk*Class docs

https://bugzilla.gnome.org/show_bug.cgi?id=81006

1 files changed, 11 insertions, 0 deletions

diff --git a/gtk/gtktoolbutton.h b/gtk/gtktoolbutton.h
index 47b4b0a1a0..574c2eb636 100644
--- a/gtk/gtktoolbutton.h
+++ b/gtk/gtktoolbutton.h
@@ -48,15 +48,26 @@ struct _GtkToolButton
   GtkToolButtonPrivate *priv;
 };
 
+/**
+ * GtkToolButtonClass:
+ * @parent_class: The parent class.
+ * @button_type: 
+ * @clicked: Signal emitted when the tool button is clicked with the
+ *    mouse or activated with the keyboard.
+ */
 struct _GtkToolButtonClass
 {
   GtkToolItemClass parent_class;
 
   GType button_type;
 
+  /*< public >*/
+
   /* signal */
   void       (* clicked)             (GtkToolButton    *tool_item);
 
+  /*< private >*/
+
   /* Padding for future expansion */
   void (* _gtk_reserved1) (void);
   void (* _gtk_reserved2) (void);