Use G_DEFINE_INTERFACE macro in gtkcelleditable

https://bugzilla.gnome.org/show_bug.cgi?id=605186

gtk/gtkcelleditable.c

@@ -25,106 +25,71 @@
 #include "gtkintl.h"
 #include "gtkalias.h"
 
-static void gtk_cell_editable_base_init (GtkCellEditableIface *iface);
-
-GType
-gtk_cell_editable_get_type (void)
-{
-  static GType cell_editable_type = 0;
-
-  if (! cell_editable_type)
-    {
-      const GTypeInfo cell_editable_info =
-      {
-	sizeof (GtkCellEditableIface),                 /* class_size */
-	(GBaseInitFunc) gtk_cell_editable_base_init,   /* base_init */
-	NULL,		                               /* base_finalize */
-	NULL,
-	NULL,		                               /* class_finalize */
-	NULL,		                               /* class_data */
-	0,
-	0,
-	NULL
-      };
-
-      cell_editable_type =
-	g_type_register_static (G_TYPE_INTERFACE, I_("GtkCellEditable"),
-				&cell_editable_info, 0);
-
-      g_type_interface_add_prerequisite (cell_editable_type, GTK_TYPE_WIDGET);
-    }
-
-  return cell_editable_type;
-}
+typedef GtkCellEditableIface GtkCellEditableInterface;
+G_DEFINE_INTERFACE(GtkCellEditable, gtk_cell_editable, GTK_TYPE_WIDGET)
 
 static void
-gtk_cell_editable_base_init (GtkCellEditableIface *iface)
+gtk_cell_editable_default_init (GtkCellEditableInterface *iface)
 {
-  static gboolean initialized = FALSE;
-
-  if (! initialized)
-    {
-      /**
-       * GtkCellEditable:editing-canceled:
-       *
-       * Indicates whether editing on the cell has been canceled.
-       *
-       * Since: 2.20
-       **/
-      g_object_interface_install_property (iface,
-                                           g_param_spec_boolean ("editing-canceled",
-                                                                 P_("Editing Canceled"),
-                                                                 P_("Indicates that editing has been canceled"),
-                                                                 FALSE,
-                                                                 GTK_PARAM_READWRITE));
-
-      /**
-       * GtkCellEditable::editing-done:
-       * @cell_editable: the object on which the signal was emitted
-       *
-       * This signal is a sign for the cell renderer to update its 
-       * value from the @cell_editable. 
-       *
-       * Implementations of #GtkCellEditable are responsible for 
-       * emitting this signal when they are done editing, e.g. 
-       * #GtkEntry is emitting it when the user presses Enter.
-       *
-       * gtk_cell_editable_editing_done() is a convenience method
-       * for emitting ::editing-done. 
-       */
-      g_signal_new (I_("editing-done"),
-                    GTK_TYPE_CELL_EDITABLE,
-                    G_SIGNAL_RUN_LAST,
-                    G_STRUCT_OFFSET (GtkCellEditableIface, editing_done),
-                    NULL, NULL,
-                    _gtk_marshal_VOID__VOID,
-                    G_TYPE_NONE, 0);
-
-      /**
-       * GtkCellEditable::remove-widget:
-       * @cell_editable: the object on which the signal was emitted
-       *
-       * This signal is meant to indicate that the cell is finished 
-       * editing, and the widget may now be destroyed. 
-       *
-       * Implementations of #GtkCellEditable are responsible for 
-       * emitting this signal when they are done editing. It must
-       * be emitted after the #GtkCellEditable::editing-done signal, 
-       * to give the cell renderer a chance to update the cell's value 
-       * before the widget is removed. 
-       *
-       * gtk_cell_editable_remove_widget() is a convenience method
-       * for emitting ::remove-widget. 
-       */
-      g_signal_new (I_("remove-widget"),
-                    GTK_TYPE_CELL_EDITABLE,
-                    G_SIGNAL_RUN_LAST,
-                    G_STRUCT_OFFSET (GtkCellEditableIface, remove_widget),
-                    NULL, NULL,
-                    _gtk_marshal_VOID__VOID,
-                    G_TYPE_NONE, 0);
-      initialized = TRUE;
-    }
+  /**
+   * GtkCellEditable:editing-canceled:
+   *
+   * Indicates whether editing on the cell has been canceled.
+   *
+   * Since: 2.20
+   */
+  g_object_interface_install_property (iface,
+                                       g_param_spec_boolean ("editing-canceled",
+                                       P_("Editing Canceled"),
+                                       P_("Indicates that editing has been canceled"),
+                                       FALSE,
+                                       GTK_PARAM_READWRITE));
+
+  /**
+   * GtkCellEditable::editing-done:
+   * @cell_editable: the object on which the signal was emitted
+   *
+   * This signal is a sign for the cell renderer to update its
+   * value from the @cell_editable.
+   *
+   * Implementations of #GtkCellEditable are responsible for
+   * emitting this signal when they are done editing, e.g.
+   * #GtkEntry is emitting it when the user presses Enter.
+   *
+   * gtk_cell_editable_editing_done() is a convenience method
+   * for emitting GtkCellEditable::editing-done.
+   */
+  g_signal_new (I_("editing-done"),
+                GTK_TYPE_CELL_EDITABLE,
+                G_SIGNAL_RUN_LAST,
+                G_STRUCT_OFFSET (GtkCellEditableIface, editing_done),
+                NULL, NULL,
+                _gtk_marshal_VOID__VOID,
+                G_TYPE_NONE, 0);
+
+  /**
+   * GtkCellEditable::remove-widget:
+   * @cell_editable: the object on which the signal was emitted
+   *
+   * This signal is meant to indicate that the cell is finished
+   * editing, and the widget may now be destroyed.
+   *
+   * Implementations of #GtkCellEditable are responsible for
+   * emitting this signal when they are done editing. It must
+   * be emitted after the #GtkCellEditable::editing-done signal,
+   * to give the cell renderer a chance to update the cell's value
+   * before the widget is removed.
+   *
+   * gtk_cell_editable_remove_widget() is a convenience method
+   * for emitting GtkCellEditable::remove-widget.
+   */
+  g_signal_new (I_("remove-widget"),
+                GTK_TYPE_CELL_EDITABLE,
+                G_SIGNAL_RUN_LAST,
+                G_STRUCT_OFFSET (GtkCellEditableIface, remove_widget),
+                NULL, NULL,
+                _gtk_marshal_VOID__VOID,
+                G_TYPE_NONE, 0);
 }
 
 /**