Fixed unrealize handler to comply with the documentation (which mentions

2018-02-11  Federico Mena Quintero  <federico@nuclecu.unam.mx>

	* gtk/gtkclist.c:
	* gtk/gtkentry.c:
	* gtk/gtkfixed.c:
	* gtk/gtkhandlebox.c:
	* gtk/gtknotebook.c:
	* gtk/gtkpaned.c:
	* gtk/gtkpreview.c:
	* gtk/gtkrange.c:
	* gtk/gtkruler.c:
	* gtk/gtktext.c:
	* gtk/gtkviewport.c:
	Fixed unrealize handler to comply with the
	documentation (which mentions the right thing to do).

18 files changed, 147 insertions, 109 deletions

diff --git a/ChangeLog b/ChangeLog
index ae74e20b35..e0f39904ce 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,19 @@
+2018-02-11  Federico Mena Quintero  <federico@nuclecu.unam.mx>
+
+	* gtk/gtkclist.c:
+	* gtk/gtkentry.c: 
+	* gtk/gtkfixed.c:
+	* gtk/gtkhandlebox.c:
+	* gtk/gtknotebook.c:
+	* gtk/gtkpaned.c:
+	* gtk/gtkpreview.c:
+	* gtk/gtkrange.c:
+	* gtk/gtkruler.c:
+	* gtk/gtktext.c:
+	* gtk/gtkviewport.c:
+	Fixed unrealize handler to comply with the
+	documentation (which mentions the right thing to do).
+
 Wed Feb 11 00:18:31 1998  Tim Janik  <timj@gimp.org>
 
 	* docs/refcounting.txt: backed out the section "Gnits to care about".
diff --git a/ChangeLog.pre-2-0 b/ChangeLog.pre-2-0
index ae74e20b35..e0f39904ce 100644
--- a/ChangeLog.pre-2-0
+++ b/ChangeLog.pre-2-0
@@ -1,3 +1,19 @@
+2018-02-11  Federico Mena Quintero  <federico@nuclecu.unam.mx>
+
+	* gtk/gtkclist.c:
+	* gtk/gtkentry.c: 
+	* gtk/gtkfixed.c:
+	* gtk/gtkhandlebox.c:
+	* gtk/gtknotebook.c:
+	* gtk/gtkpaned.c:
+	* gtk/gtkpreview.c:
+	* gtk/gtkrange.c:
+	* gtk/gtkruler.c:
+	* gtk/gtktext.c:
+	* gtk/gtkviewport.c:
+	Fixed unrealize handler to comply with the
+	documentation (which mentions the right thing to do).
+
 Wed Feb 11 00:18:31 1998  Tim Janik  <timj@gimp.org>
 
 	* docs/refcounting.txt: backed out the section "Gnits to care about".
diff --git a/ChangeLog.pre-2-10 b/ChangeLog.pre-2-10
index ae74e20b35..e0f39904ce 100644
--- a/ChangeLog.pre-2-10
+++ b/ChangeLog.pre-2-10
@@ -1,3 +1,19 @@
+2018-02-11  Federico Mena Quintero  <federico@nuclecu.unam.mx>
+
+	* gtk/gtkclist.c:
+	* gtk/gtkentry.c: 
+	* gtk/gtkfixed.c:
+	* gtk/gtkhandlebox.c:
+	* gtk/gtknotebook.c:
+	* gtk/gtkpaned.c:
+	* gtk/gtkpreview.c:
+	* gtk/gtkrange.c:
+	* gtk/gtkruler.c:
+	* gtk/gtktext.c:
+	* gtk/gtkviewport.c:
+	Fixed unrealize handler to comply with the
+	documentation (which mentions the right thing to do).
+
 Wed Feb 11 00:18:31 1998  Tim Janik  <timj@gimp.org>
 
 	* docs/refcounting.txt: backed out the section "Gnits to care about".
diff --git a/ChangeLog.pre-2-2 b/ChangeLog.pre-2-2
index ae74e20b35..e0f39904ce 100644
--- a/ChangeLog.pre-2-2
+++ b/ChangeLog.pre-2-2
@@ -1,3 +1,19 @@
+2018-02-11  Federico Mena Quintero  <federico@nuclecu.unam.mx>
+
+	* gtk/gtkclist.c:
+	* gtk/gtkentry.c: 
+	* gtk/gtkfixed.c:
+	* gtk/gtkhandlebox.c:
+	* gtk/gtknotebook.c:
+	* gtk/gtkpaned.c:
+	* gtk/gtkpreview.c:
+	* gtk/gtkrange.c:
+	* gtk/gtkruler.c:
+	* gtk/gtktext.c:
+	* gtk/gtkviewport.c:
+	Fixed unrealize handler to comply with the
+	documentation (which mentions the right thing to do).
+
 Wed Feb 11 00:18:31 1998  Tim Janik  <timj@gimp.org>
 
 	* docs/refcounting.txt: backed out the section "Gnits to care about".
diff --git a/ChangeLog.pre-2-4 b/ChangeLog.pre-2-4
index ae74e20b35..e0f39904ce 100644
--- a/ChangeLog.pre-2-4
+++ b/ChangeLog.pre-2-4
@@ -1,3 +1,19 @@
+2018-02-11  Federico Mena Quintero  <federico@nuclecu.unam.mx>
+
+	* gtk/gtkclist.c:
+	* gtk/gtkentry.c: 
+	* gtk/gtkfixed.c:
+	* gtk/gtkhandlebox.c:
+	* gtk/gtknotebook.c:
+	* gtk/gtkpaned.c:
+	* gtk/gtkpreview.c:
+	* gtk/gtkrange.c:
+	* gtk/gtkruler.c:
+	* gtk/gtktext.c:
+	* gtk/gtkviewport.c:
+	Fixed unrealize handler to comply with the
+	documentation (which mentions the right thing to do).
+
 Wed Feb 11 00:18:31 1998  Tim Janik  <timj@gimp.org>
 
 	* docs/refcounting.txt: backed out the section "Gnits to care about".
diff --git a/ChangeLog.pre-2-6 b/ChangeLog.pre-2-6
index ae74e20b35..e0f39904ce 100644
--- a/ChangeLog.pre-2-6
+++ b/ChangeLog.pre-2-6
@@ -1,3 +1,19 @@
+2018-02-11  Federico Mena Quintero  <federico@nuclecu.unam.mx>
+
+	* gtk/gtkclist.c:
+	* gtk/gtkentry.c: 
+	* gtk/gtkfixed.c:
+	* gtk/gtkhandlebox.c:
+	* gtk/gtknotebook.c:
+	* gtk/gtkpaned.c:
+	* gtk/gtkpreview.c:
+	* gtk/gtkrange.c:
+	* gtk/gtkruler.c:
+	* gtk/gtktext.c:
+	* gtk/gtkviewport.c:
+	Fixed unrealize handler to comply with the
+	documentation (which mentions the right thing to do).
+
 Wed Feb 11 00:18:31 1998  Tim Janik  <timj@gimp.org>
 
 	* docs/refcounting.txt: backed out the section "Gnits to care about".
diff --git a/ChangeLog.pre-2-8 b/ChangeLog.pre-2-8
index ae74e20b35..e0f39904ce 100644
--- a/ChangeLog.pre-2-8
+++ b/ChangeLog.pre-2-8
@@ -1,3 +1,19 @@
+2018-02-11  Federico Mena Quintero  <federico@nuclecu.unam.mx>
+
+	* gtk/gtkclist.c:
+	* gtk/gtkentry.c: 
+	* gtk/gtkfixed.c:
+	* gtk/gtkhandlebox.c:
+	* gtk/gtknotebook.c:
+	* gtk/gtkpaned.c:
+	* gtk/gtkpreview.c:
+	* gtk/gtkrange.c:
+	* gtk/gtkruler.c:
+	* gtk/gtktext.c:
+	* gtk/gtkviewport.c:
+	Fixed unrealize handler to comply with the
+	documentation (which mentions the right thing to do).
+
 Wed Feb 11 00:18:31 1998  Tim Janik  <timj@gimp.org>
 
 	* docs/refcounting.txt: backed out the section "Gnits to care about".
diff --git a/gtk/gtkclist.c b/gtk/gtkclist.c
index b950909629..e7654664e1 100644
--- a/gtk/gtkclist.c
+++ b/gtk/gtkclist.c
@@ -1700,7 +1700,7 @@ gtk_clist_unrealize (GtkWidget * widget)
   g_return_if_fail (GTK_IS_CLIST (widget));
 
   clist = GTK_CLIST (widget);
-  GTK_WIDGET_UNSET_FLAGS (widget, GTK_REALIZED | GTK_MAPPED);
+
   GTK_CLIST_SET_FLAGS (clist, CLIST_FROZEN);
 
   gdk_cursor_destroy (clist->cursor_drag);
@@ -1708,8 +1708,6 @@ gtk_clist_unrealize (GtkWidget * widget)
   gdk_gc_destroy (clist->fg_gc);
   gdk_gc_destroy (clist->bg_gc);
 
-  gtk_style_detach (widget->style);
-
   for (i = 0; i < clist->columns; i++)
     if (clist->column[i].window)
       {
@@ -1721,17 +1719,18 @@ gtk_clist_unrealize (GtkWidget * widget)
   gdk_window_set_user_data (clist->clist_window, NULL);
   gdk_window_destroy (clist->clist_window);
   clist->clist_window = NULL;
+
   gdk_window_set_user_data (clist->title_window, NULL);
   gdk_window_destroy (clist->title_window);
   clist->title_window = NULL;
-  gdk_window_set_user_data (widget->window, NULL);
-  gdk_window_destroy (widget->window);
-  widget->window = NULL;
 
   clist->cursor_drag = NULL;
   clist->xor_gc = NULL;
   clist->fg_gc = NULL;
   clist->bg_gc = NULL;
+
+  if (GTK_WIDGET_CLASS (parent_class)->unrealize)
+    (* GTK_WIDGET_CLASS (parent_class)->unrealize) (widget);
 }
 
 static void
diff --git a/gtk/gtkentry.c b/gtk/gtkentry.c
index 850af4800d..276f779f25 100644
--- a/gtk/gtkentry.c
+++ b/gtk/gtkentry.c
@@ -681,11 +681,8 @@ gtk_entry_unrealize (GtkWidget *widget)
   g_return_if_fail (widget != NULL);
   g_return_if_fail (GTK_IS_ENTRY (widget));
 
-  GTK_WIDGET_UNSET_FLAGS (widget, GTK_REALIZED | GTK_MAPPED);
   entry = GTK_ENTRY (widget);
 
-  gtk_style_detach (widget->style);
-
   if (entry->text_area)
     {
       gdk_window_set_user_data (entry->text_area, NULL);
@@ -694,12 +691,9 @@ gtk_entry_unrealize (GtkWidget *widget)
       gdk_cursor_destroy (entry->cursor);
       entry->cursor = NULL;
     }
-  if (widget->window)
-    {
-      gdk_window_set_user_data (widget->window, NULL);
-      gdk_window_destroy (widget->window);
-      widget->window = NULL;
-    }
+
+  if (GTK_WIDGET_CLASS (parent_class)->unrealize)
+    (* GTK_WIDGET_CLASS (parent_class)->unrealize) (widget);
 }
 
 static void
diff --git a/gtk/gtkfixed.c b/gtk/gtkfixed.c
index 2a1b35e2f8..9b304cffc0 100644
--- a/gtk/gtkfixed.c
+++ b/gtk/gtkfixed.c
@@ -23,7 +23,6 @@ static void gtk_fixed_init          (GtkFixed         *fixed);
 static void gtk_fixed_map           (GtkWidget        *widget);
 static void gtk_fixed_unmap         (GtkWidget        *widget);
 static void gtk_fixed_realize       (GtkWidget        *widget);
-static void gtk_fixed_unrealize     (GtkWidget        *widget);
 static void gtk_fixed_size_request  (GtkWidget        *widget,
 				     GtkRequisition   *requisition);
 static void gtk_fixed_size_allocate (GtkWidget        *widget,
@@ -86,7 +85,6 @@ gtk_fixed_class_init (GtkFixedClass *class)
   widget_class->map = gtk_fixed_map;
   widget_class->unmap = gtk_fixed_unmap;
   widget_class->realize = gtk_fixed_realize;
-  widget_class->unrealize = gtk_fixed_unrealize;
   widget_class->size_request = gtk_fixed_size_request;
   widget_class->size_allocate = gtk_fixed_size_allocate;
   widget_class->draw = gtk_fixed_draw;
@@ -247,20 +245,6 @@ gtk_fixed_realize (GtkWidget *widget)
 }
 
 static void
-gtk_fixed_unrealize (GtkWidget *widget)
-{
-  g_return_if_fail (widget != NULL);
-  g_return_if_fail (GTK_IS_FIXED (widget));
-
-  GTK_WIDGET_UNSET_FLAGS (widget, GTK_REALIZED | GTK_MAPPED);
-
-  gtk_style_detach (widget->style);
-  gdk_window_set_user_data (widget->window, NULL);
-  gdk_window_destroy (widget->window);
-  widget->window = NULL;
-}
-
-static void
 gtk_fixed_size_request (GtkWidget      *widget,
 			GtkRequisition *requisition)
 {
diff --git a/gtk/gtkhandlebox.c b/gtk/gtkhandlebox.c
index 31b817cb25..69a9823026 100644
--- a/gtk/gtkhandlebox.c
+++ b/gtk/gtkhandlebox.c
@@ -258,19 +258,8 @@ gtk_handle_box_unrealize (GtkWidget *widget)
   g_return_if_fail (widget != NULL);
   g_return_if_fail (GTK_IS_HANDLE_BOX (widget));
 
-  GTK_WIDGET_UNSET_FLAGS (widget, GTK_REALIZED | GTK_MAPPED);
-
-  gtk_style_detach (widget->style);
-
   hb = GTK_HANDLE_BOX (widget);
 
-  if (widget->window)
-    {
-      gdk_window_set_user_data (widget->window, NULL);
-      gdk_window_destroy (widget->window);
-      widget->window = NULL;
-    }
-
   if (hb->steady_window)
     {
       gdk_window_set_user_data (hb->steady_window, NULL);
@@ -280,6 +269,9 @@ gtk_handle_box_unrealize (GtkWidget *widget)
 
   gtk_widget_destroy (hb->float_window);
   hb->float_window = NULL;
+
+  if (GTK_WIDGET_CLASS (parent_class)->unrealize)
+    (* GTK_WIDGET_CLASS (parent_class)->unrealize) (widget);
 }
 
 static void
diff --git a/gtk/gtknotebook.c b/gtk/gtknotebook.c
index 171c381fe7..ee96fc7d69 100644
--- a/gtk/gtknotebook.c
+++ b/gtk/gtknotebook.c
@@ -38,7 +38,6 @@ static void gtk_notebook_init           (GtkNotebook      *notebook);
 static void gtk_notebook_map            (GtkWidget        *widget);
 static void gtk_notebook_unmap          (GtkWidget        *widget);
 static void gtk_notebook_realize        (GtkWidget        *widget);
-static void gtk_notebook_unrealize      (GtkWidget        *widget);
 static void gtk_notebook_size_request   (GtkWidget        *widget,
 					 GtkRequisition   *requisition);
 static void gtk_notebook_size_allocate  (GtkWidget        *widget,
@@ -131,7 +130,6 @@ gtk_notebook_class_init (GtkNotebookClass *class)
   widget_class->map = gtk_notebook_map;
   widget_class->unmap = gtk_notebook_unmap;
   widget_class->realize = gtk_notebook_realize;
-  widget_class->unrealize = gtk_notebook_unrealize;
   widget_class->size_request = gtk_notebook_size_request;
   widget_class->size_allocate = gtk_notebook_size_allocate;
   widget_class->draw = gtk_notebook_draw;
@@ -508,20 +506,6 @@ gtk_notebook_realize (GtkWidget *widget)
 }
 
 static void
-gtk_notebook_unrealize (GtkWidget *widget)
-{
-  g_return_if_fail (widget != NULL);
-  g_return_if_fail (GTK_IS_NOTEBOOK (widget));
-
-  GTK_WIDGET_UNSET_FLAGS (widget, GTK_REALIZED | GTK_MAPPED);
-
-  gtk_style_detach (widget->style);
-  gdk_window_set_user_data (widget->window, NULL);
-  gdk_window_destroy (widget->window);
-  widget->window = NULL;
-}
-
-static void
 gtk_notebook_size_request (GtkWidget      *widget,
 			   GtkRequisition *requisition)
 {
diff --git a/gtk/gtkpaned.c b/gtk/gtkpaned.c
index d47082c457..0cb4feec88 100644
--- a/gtk/gtkpaned.c
+++ b/gtk/gtkpaned.c
@@ -210,13 +210,13 @@ gtk_paned_unrealize (GtkWidget *widget)
   g_return_if_fail (widget != NULL);
   g_return_if_fail (GTK_IS_PANED (widget));
 
-  GTK_WIDGET_UNSET_FLAGS (widget, GTK_REALIZED);
   paned = GTK_PANED (widget);
 
-  gtk_style_detach (widget->style);
-
   if (paned->xor_gc)
-    gdk_gc_destroy (paned->xor_gc);
+    {
+      gdk_gc_destroy (paned->xor_gc);
+      paned->xor_gc = NULL;
+    }
 
   if (paned->handle)
     {
@@ -227,11 +227,8 @@ gtk_paned_unrealize (GtkWidget *widget)
       paned->cursor = NULL;
     }
 
-  if (widget->window)
-    {
-      gdk_window_unref (widget->window);
-      widget->window = NULL;
-    }
+  if (GTK_WIDGET_CLASS (parent_class)->unrealize)
+    (* GTK_WIDGET_CLASS (parent_class)->unrealize) (widget);
 }
 
 static gint
diff --git a/gtk/gtkpreview.c b/gtk/gtkpreview.c
index 8e73d277dd..269c9fe706 100644
--- a/gtk/gtkpreview.c
+++ b/gtk/gtkpreview.c
@@ -48,7 +48,6 @@ static void   gtk_preview_class_init    (GtkPreviewClass  *klass);
 static void   gtk_preview_init          (GtkPreview       *preview);
 static void   gtk_preview_finalize      (GtkObject        *object);
 static void   gtk_preview_realize       (GtkWidget        *widget);
-static void   gtk_preview_unrealize     (GtkWidget        *widget);
 static gint   gtk_preview_expose        (GtkWidget        *widget,
 				         GdkEventExpose   *event);
 static void   gtk_preview_make_buffer   (GtkPreview       *preview);
@@ -165,7 +164,6 @@ gtk_preview_class_init (GtkPreviewClass *klass)
   object_class->finalize = gtk_preview_finalize;
 
   widget_class->realize = gtk_preview_realize;
-  widget_class->unrealize = gtk_preview_unrealize;
   widget_class->expose_event = gtk_preview_expose;
 
   if (preview_info)
@@ -682,20 +680,6 @@ gtk_preview_realize (GtkWidget *widget)
   gtk_style_set_background (widget->style, widget->window, GTK_STATE_NORMAL);
 }
 
-static void
-gtk_preview_unrealize (GtkWidget *widget)
-{
-  GtkPreview *preview;
-
-  g_return_if_fail (widget != NULL);
-  g_return_if_fail (GTK_IS_PREVIEW (widget));
-
-  preview = GTK_PREVIEW (widget);
-
-  if (GTK_WIDGET_CLASS (parent_class)->unrealize)
-    (* GTK_WIDGET_CLASS (parent_class)->unrealize) (widget);
-}
-
 static gint
 gtk_preview_expose (GtkWidget      *widget,
 		    GdkEventExpose *event)
diff --git a/gtk/gtkrange.c b/gtk/gtkrange.c
index ad7b53e8b6..1573a56e74 100644
--- a/gtk/gtkrange.c
+++ b/gtk/gtkrange.c
@@ -643,11 +643,8 @@ gtk_range_unrealize (GtkWidget *widget)
   g_return_if_fail (widget != NULL);
   g_return_if_fail (GTK_IS_RANGE (widget));
 
-  GTK_WIDGET_UNSET_FLAGS (widget, GTK_REALIZED);
   range = GTK_RANGE (widget);
 
-  gtk_style_detach (widget->style);
-
   if (range->slider)
     {
       gdk_window_set_user_data (range->slider, NULL);
@@ -672,12 +669,9 @@ gtk_range_unrealize (GtkWidget *widget)
       gdk_window_destroy (range->step_back);
       range->step_back = NULL;
     }
-  if (widget->window)
-    {
-      gdk_window_set_user_data (widget->window, NULL);
-      gdk_window_destroy (widget->window);
-      widget->window = NULL;
-    }
+
+  if (GTK_WIDGET_CLASS (parent_class)->unrealize)
+    (* GTK_WIDGET_CLASS (parent_class)->unrealize) (widget);
 }
 
 static gint
diff --git a/gtk/gtkruler.c b/gtk/gtkruler.c
index 5876ba9fa1..009d1e6419 100644
--- a/gtk/gtkruler.c
+++ b/gtk/gtkruler.c
@@ -29,6 +29,8 @@ static gint gtk_ruler_expose        (GtkWidget      *widget,
 static void gtk_ruler_make_pixmap   (GtkRuler       *ruler);
 
 
+static GtkWidgetClass *parent_class;
+
 static GtkRulerMetric ruler_metrics[] =
 {
   {"Pixels", "Pi", 1.0, { 1, 2, 5, 10, 25, 50, 100, 250, 500, 1000 }, { 1, 5, 10, 50, 100 }},
@@ -70,6 +72,8 @@ gtk_ruler_class_init (GtkRulerClass *class)
   object_class = (GtkObjectClass*) class;
   widget_class = (GtkWidgetClass*) class;
 
+  parent_class = gtk_type_class (gtk_widget_get_type ());
+
   widget_class->realize = gtk_ruler_realize;
   widget_class->unrealize = gtk_ruler_unrealize;
   widget_class->size_allocate = gtk_ruler_size_allocate;
@@ -194,12 +198,6 @@ gtk_ruler_unrealize (GtkWidget *widget)
   g_return_if_fail (GTK_IS_RULER (widget));
 
   ruler = GTK_RULER (widget);
-  GTK_WIDGET_UNSET_FLAGS (widget, GTK_REALIZED | GTK_MAPPED);
-
-  gtk_style_detach (widget->style);
-  gdk_window_set_user_data (widget->window, NULL);
-  gdk_window_destroy (widget->window);
-  widget->window = NULL;
 
   if (ruler->backing_store)
     gdk_pixmap_unref (ruler->backing_store);
@@ -208,6 +206,9 @@ gtk_ruler_unrealize (GtkWidget *widget)
 
   ruler->backing_store = NULL;
   ruler->non_gr_exp_gc = NULL;
+
+  if (GTK_WIDGET_CLASS (parent_class)->unrealize)
+    (* GTK_WIDGET_CLASS (parent_class)->unrealize) (widget);
 }
 
 static void
diff --git a/gtk/gtktext.c b/gtk/gtktext.c
index 357dbc67a7..79797cccc2 100644
--- a/gtk/gtktext.c
+++ b/gtk/gtktext.c
@@ -701,17 +701,16 @@ gtk_text_unrealize (GtkWidget *widget)
   g_return_if_fail (GTK_IS_TEXT (widget));
 
   text = GTK_TEXT (widget);
-  GTK_WIDGET_UNSET_FLAGS (widget, GTK_REALIZED | GTK_MAPPED);
 
-  gtk_style_detach (widget->style);
-  gdk_window_set_user_data (widget->window, NULL);
-  gdk_window_destroy (widget->window);
-  widget->window = NULL;
   gdk_window_set_user_data (text->text_area, NULL);
   gdk_window_destroy (text->text_area);
   text->text_area = NULL;
+
   gdk_gc_destroy (text->gc);
   text->gc = NULL;
+
+  if (GTK_WIDGET_CLASS (parent_class)->unrealize)
+    (* GTK_WIDGET_CLASS (parent_class)->unrealize) (widget);
 }
 
 static void
diff --git a/gtk/gtkviewport.c b/gtk/gtkviewport.c
index b899b61c8b..cf04127dde 100644
--- a/gtk/gtkviewport.c
+++ b/gtk/gtkviewport.c
@@ -345,19 +345,17 @@ gtk_viewport_unrealize (GtkWidget *widget)
   g_return_if_fail (GTK_IS_VIEWPORT (widget));
 
   viewport = GTK_VIEWPORT (widget);
-  GTK_WIDGET_UNSET_FLAGS (widget, GTK_REALIZED | GTK_MAPPED);
 
-  gtk_style_detach (widget->style);
-
-  gdk_window_set_user_data (widget->window, NULL);
-  gdk_window_destroy (widget->window);
-  widget->window = NULL;
   gdk_window_set_user_data (viewport->view_window, NULL);
   gdk_window_destroy (viewport->view_window);
   viewport->view_window = NULL;
+
   gdk_window_set_user_data (viewport->bin_window, NULL);
   gdk_window_destroy (viewport->bin_window);
   viewport->bin_window = NULL;
+
+  if (GTK_WIDGET_CLASS (parent_class)->unrealize)
+    (* GTK_WIDGET_CLASS (parent_class)->unrealize) (widget);
 }
 
 static void