Fix notify::label emmision in GtkMenuItem

Emit notify::label in GtkMenuItem also when label is changed through GtkAction.

Refactor GtkMenuItem and remove duplicated code for GtkLabel creation. Reset
the accel-widget back to the GtkMenuItem itself when there is no action related
to the GtkMenuItem anymore.

Add test for notify::label emmisions.

Fixes bug 612574 - GtkMenuItem does not emit notify::label when label is
changed through GtkAction.

gtk/gtkmenuitem.c

@@ -636,7 +636,7 @@ activatable_update_label (GtkMenuItem *menu_item, GtkAction *action)
       const gchar *label;
 
       label = gtk_action_get_label (action);
-      gtk_label_set_label (GTK_LABEL (child), label ? label : "");
+      gtk_menu_item_set_label (menu_item, label);
     }
 }
 
@@ -669,6 +669,16 @@ gtk_menu_item_sync_action_properties (GtkActivatable *activatable,
   GtkMenuItem *menu_item = GTK_MENU_ITEM (activatable);
   GtkMenuItemPrivate *priv = GET_PRIVATE (menu_item);
 
+  if (!priv->use_action_appearance || !action)
+    {
+      GtkWidget *label = GTK_BIN (menu_item)->child;
+
+      label = GTK_BIN (menu_item)->child;
+
+      if (GTK_IS_ACCEL_LABEL (label))
+        gtk_accel_label_set_accel_widget (GTK_ACCEL_LABEL (label), GTK_WIDGET (menu_item));
+    }
+
   if (!action)
     return;
 
@@ -688,18 +698,17 @@ gtk_menu_item_sync_action_properties (GtkActivatable *activatable,
 	  label = NULL;
 	}
 
-      if (!label)
-	label = g_object_new (GTK_TYPE_ACCEL_LABEL,
-			      "use-underline", TRUE,
-			      "xalign", 0.0,
-			      "visible", TRUE,
-			      "parent", menu_item,
-			      NULL);
+      gtk_menu_item_ensure_label (menu_item);
+      gtk_menu_item_set_use_underline (menu_item, TRUE);
+
+      label = GTK_BIN (menu_item)->child;
 
       if (GTK_IS_ACCEL_LABEL (label) && gtk_action_get_accel_path (action))
-	g_object_set (label,
-		      "accel-closure", gtk_action_get_accel_closure (action),
-		      NULL);
+        {
+          gtk_accel_label_set_accel_widget (GTK_ACCEL_LABEL (label), NULL);
+          gtk_accel_label_set_accel_closure (GTK_ACCEL_LABEL (label),
+                                             gtk_action_get_accel_closure (action));
+        }
 
       activatable_update_label (menu_item, action);
     }
@@ -2115,7 +2124,7 @@ gtk_menu_item_ensure_label (GtkMenuItem *menu_item)
 
   if (!GTK_BIN (menu_item)->child)
     {
-      accel_label = (GtkWidget *)g_object_new (GTK_TYPE_ACCEL_LABEL, NULL);
+      accel_label = g_object_new (GTK_TYPE_ACCEL_LABEL, NULL);
       gtk_misc_set_alignment (GTK_MISC (accel_label), 0.0, 0.5);
 
       gtk_container_add (GTK_CONTAINER (menu_item), accel_label);

gtk/tests/Makefile.am

@@ -91,4 +91,8 @@ TEST_PROGS			+= expander
 expander_SOURCES		 = expander.c
 expander_LDADD		 = $(progs_ldadd)
 
+TEST_PROGS			+= action
+action_SOURCES			 = action.c
+action_LDADD			 = $(progs_ldadd)
+
 -include $(top_srcdir)/git.mk

gtk/tests/action.c

@@ -0,0 +1,91 @@
+/* GtkAction tests.
+ *
+ * Authors: Jan Arne Petersen <jpetersen@openismus.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#include <gtk/gtk.h>
+
+/* Fixture */
+
+typedef struct
+{
+  GtkAction *action;
+} ActionTest;
+
+static void
+action_test_setup (ActionTest    *fixture,
+                   gconstpointer  test_data)
+{
+  fixture->action = gtk_action_new ("name", "label", NULL, NULL);
+}
+
+static void
+action_test_teardown (ActionTest    *fixture,
+                      gconstpointer  test_data)
+{
+  g_object_unref (fixture->action);
+}
+
+static void
+notify_count_emmisions (GObject    *object,
+			GParamSpec *pspec,
+			gpointer    data)
+{
+  unsigned int *i = data;
+  (*i)++;
+}
+
+static void
+menu_item_label_notify_count (ActionTest    *fixture,
+                              gconstpointer  test_data)
+{
+  GtkMenuItem *item = gtk_menu_item_new ();
+  unsigned int emmisions = 0;
+
+  g_signal_connect (item, "notify::label",
+		    G_CALLBACK (notify_count_emmisions), &emmisions);
+
+  gtk_activatable_do_set_related_action (GTK_ACTIVATABLE (item),
+					 fixture->action);
+
+  g_assert_cmpuint (emmisions, ==, 1);
+
+  gtk_action_set_label (fixture->action, "new label");
+
+  g_assert_cmpuint (emmisions, ==, 2);
+
+  g_object_unref (item);
+}
+
+/* main */
+
+int
+main (int    argc,
+      char **argv)
+{
+  gtk_test_init (&argc, &argv, NULL);
+
+  g_test_add ("/Action/MenuItem/label-notify-count",
+              ActionTest, NULL,
+              action_test_setup,
+              menu_item_label_notify_count,
+              action_test_teardown);
+
+  return g_test_run ();
+}
+