[gtkmm] Show get_type() in the API documentation.

[Murray Cumming <murrayc src gnome org>]

commit 67081d1f7b24a1ea8141b42434fd8260e671249f
Author: Murray Cumming <murrayc murrayc com>
Date:   Mon Jul 16 11:15:44 2012 +0200

    Show get_type() in the API documentation.
    
    * tools/m4/class_gtkobject.m4: Move the static get_type()
    functions out of the ifdef so that doxygen can see them,
    because they are sometimes needed, for instance when
    implementing a custom container.
    Bug #670212 (Mark Vender).

 ChangeLog                   |   10 ++++++++++
 tools/m4/class_gtkobject.m4 |    5 ++++-
 2 files changed, 14 insertions(+), 1 deletions(-)
---
diff --git a/ChangeLog b/ChangeLog
index 896e7e2..c547c90 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,15 @@
 2012-07-16  Murray Cumming  <murrayc murrayc com>
 
+	Show get_type() in the API documentation.
+
+	* tools/m4/class_gtkobject.m4: Move the static get_type()
+	functions out of the ifdef so that doxygen can see them,
+	because they are sometimes needed, for instance when 
+	implementing a custom container.
+	Bug #670212 (Mark Vender).
+
+2012-07-16  Murray Cumming  <murrayc murrayc com>
+
 	Settings: Deprecate the gtk-touchscreen-property.
 
 	* gtk/src/settings.hg: Because it was deprecated in GTK+.
diff --git a/tools/m4/class_gtkobject.m4 b/tools/m4/class_gtkobject.m4
index 7d9e923..6c721bf 100644
--- a/tools/m4/class_gtkobject.m4
+++ b/tools/m4/class_gtkobject.m4
@@ -209,9 +209,12 @@ protected:
 #endif /* DOXYGEN_SHOULD_SKIP_THIS */
 
 public:
-#ifndef DOXYGEN_SHOULD_SKIP_THIS
+
+  /** Get the GType for this class, for use with the underlying GObject type system.
+   */
   static GType get_type()      G_GNUC_CONST;
 
+#ifndef DOXYGEN_SHOULD_SKIP_THIS
 ifdef(`__BOOL_DYNAMIC_GTYPE_REGISTRATION__',`
   static GType get_type(GTypeModule* module)      G_GNUC_CONST;
 ',`')