[gtk+] menubutton: make it work with custom content in .ui file

[Matthias Clasen <matthiasc src gnome org>]

commit 6e6487b461adf2628f49fc257a7a30a2346e5a25
Author: David Zeuthen <zeuthen gmail com>
Date:   Tue Aug 21 12:49:02 2012 -0400

    menubutton: make it work with custom content in .ui file
    
    This was reported in bug 682291.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=682291
    
    Signed-off-by: David Zeuthen <zeuthen gmail com>

 gtk/gtkmenubutton.c |   22 ++++++++++++++++++----
 1 files changed, 18 insertions(+), 4 deletions(-)
---
diff --git a/gtk/gtkmenubutton.c b/gtk/gtkmenubutton.c
index b324de5..c847482 100644
--- a/gtk/gtkmenubutton.c
+++ b/gtk/gtkmenubutton.c
@@ -173,6 +173,7 @@ enum
 
 G_DEFINE_TYPE(GtkMenuButton, gtk_menu_button, GTK_TYPE_TOGGLE_BUTTON)
 
+static void gtk_menu_button_constructed (GObject *object);
 static void gtk_menu_button_dispose (GObject *object);
 
 static void
@@ -449,6 +450,7 @@ gtk_menu_button_class_init (GtkMenuButtonClass *klass)
 
   gobject_class->set_property = gtk_menu_button_set_property;
   gobject_class->get_property = gtk_menu_button_get_property;
+  gobject_class->constructed = gtk_menu_button_constructed;
   gobject_class->dispose = gtk_menu_button_dispose;
 
   widget_class->state_flags_changed = gtk_menu_button_state_flags_changed;
@@ -531,7 +533,7 @@ gtk_menu_button_class_init (GtkMenuButtonClass *klass)
                                                       P_("The direction the arrow should point."),
                                                       GTK_TYPE_ARROW_TYPE,
                                                       GTK_ARROW_DOWN,
-                                                      G_PARAM_READWRITE));
+                                                      G_PARAM_READWRITE | G_PARAM_CONSTRUCT));
 }
 
 static void
@@ -554,8 +556,6 @@ gtk_menu_button_init (GtkMenuButton *menu_button)
   menu_button->priv = priv;
   priv->arrow_type = GTK_ARROW_DOWN;
 
-  add_arrow (menu_button);
-
   gtk_widget_set_sensitive (GTK_WIDGET (menu_button), FALSE);
 }
 
@@ -856,8 +856,11 @@ gtk_menu_button_set_direction (GtkMenuButton *menu_button,
 
   priv->arrow_type = direction;
 
-  /* Is it custom content? We don't change that */
   child = gtk_bin_get_child (GTK_BIN (menu_button));
+  if (child == NULL)
+    return;
+
+  /* Is it custom content? We don't change that */
   if (priv->arrow_widget != child)
     return;
 
@@ -883,6 +886,17 @@ gtk_menu_button_get_direction (GtkMenuButton *menu_button)
 }
 
 static void
+gtk_menu_button_constructed (GObject *object)
+{
+  GtkMenuButton *button = GTK_MENU_BUTTON (object);
+
+  if (button->priv->arrow_type != GTK_ARROW_NONE)
+    add_arrow (button);
+
+  G_OBJECT_CLASS (gtk_menu_button_parent_class)->constructed (object);
+}
+
+static void
 gtk_menu_button_dispose (GObject *object)
 {
   GtkMenuButtonPrivate *priv = GTK_MENU_BUTTON (object)->priv;