fix braino. New interface to add cleanup sortable support.

Thu Mar 22 19:27:34 2001  Jonathan Blandford  <jrb@redhat.com>

	* gtk/gtkcellrenderertoggle.c (gtk_cell_renderer_toggle_render):
	fix braino.
	* gtk/gtktreesortable.[ch]: New interface to add cleanup sortable
	support.

	* gtk/gtktreeview.c: Addition of initial sortable support.

	* gtk/gtktreestore.c: Addition of initial sortable support.

	* gtk/gtkliststore.c: Addition of initial sortable support.

	* gtk/gtkmarshal.list: yet another marshaller.

	* gtk/gtktreedatallist.[ch]: shared code between the store models
	for handling sorting headers.

16 files changed, 647 insertions, 151 deletions

diff --git a/gtk/Makefile.am b/gtk/Makefile.am
index a33192e884..8ed2d8d1a1 100644
--- a/gtk/Makefile.am
+++ b/gtk/Makefile.am
@@ -344,6 +344,7 @@ gtk_c_sources = @STRIP_BEGIN@   \
 	gtktreemodel.c		\
 	gtktreemodelsort.c	\
 	gtktreeselection.c	\
+	gtktreesortable.c	\
 	gtktreestore.c		\
 	gtktreeview.c		\
 	gtktreeviewcolumn.c	\
diff --git a/gtk/gtkcellrenderertoggle.c b/gtk/gtkcellrenderertoggle.c
index c257db44fb..6207968f39 100644
--- a/gtk/gtkcellrenderertoggle.c
+++ b/gtk/gtkcellrenderertoggle.c
@@ -291,8 +291,8 @@ gtk_cell_renderer_toggle_render (GtkCellRenderer *cell,
                         window,
                         state, shadow,
                         cell_area, widget, "cellradio",
-                        cell_area->x + x_offset,
-                        cell_area->y + y_offset,
+                        cell_area->x + x_offset + cell->xpad,
+                        cell_area->y + y_offset + cell->ypad,
                         width, height);
     }
   else
@@ -301,8 +301,8 @@ gtk_cell_renderer_toggle_render (GtkCellRenderer *cell,
                        window,
                        state, shadow,
                        cell_area, widget, "cellcheck",
-                       cell_area->x + x_offset,
-                       cell_area->y + y_offset,
+                       cell_area->x + x_offset + cell->xpad,
+                       cell_area->y + y_offset + cell->ypad,
                        width, height);
     }
 }
diff --git a/gtk/gtkliststore.c b/gtk/gtkliststore.c
index 480a9217e8..92de43a1ad 100644
--- a/gtk/gtkliststore.c
+++ b/gtk/gtkliststore.c
@@ -32,6 +32,7 @@ static void         gtk_list_store_class_init      (GtkListStoreClass *class);
 static void         gtk_list_store_tree_model_init (GtkTreeModelIface *iface);
 static void         gtk_list_store_drag_source_init(GtkTreeDragSourceIface *iface);
 static void         gtk_list_store_drag_dest_init  (GtkTreeDragDestIface   *iface);
+static void         gtk_list_store_sortable_init   (GtkTreeSortableIface   *iface);
 static guint        gtk_list_store_get_flags       (GtkTreeModel      *tree_model);
 static gint         gtk_list_store_get_n_columns   (GtkTreeModel      *tree_model);
 static GType        gtk_list_store_get_column_type (GtkTreeModel      *tree_model,
@@ -62,6 +63,8 @@ static gboolean     gtk_list_store_iter_parent     (GtkTreeModel      *tree_mode
 						    GtkTreeIter       *iter,
 						    GtkTreeIter       *child);
 
+
+/* Drag and Drop */
 static gboolean gtk_list_store_drag_data_delete   (GtkTreeDragSource *drag_source,
                                                    GtkTreePath       *path);
 static gboolean gtk_list_store_drag_data_get      (GtkTreeDragSource *drag_source,
@@ -74,6 +77,22 @@ static gboolean gtk_list_store_row_drop_possible  (GtkTreeDragDest   *drag_dest,
                                                    GtkTreeModel      *src_model,
                                                    GtkTreePath       *src_path,
                                                    GtkTreePath       *dest_path);
+
+/* sortable */
+static gboolean gtk_list_store_get_sort_column_id      (GtkTreeSortable        *sortable,
+							gint                   *sort_column_id,
+							GtkTreeSortOrder       *order);
+static void     gtk_list_store_set_sort_column_id      (GtkTreeSortable        *sortable,
+							gint                    sort_column_id,
+							GtkTreeSortOrder        order);
+static void     gtk_list_store_sort_column_id_set_func (GtkTreeSortable        *sortable,
+							gint                    sort_column_id,
+							GtkTreeIterCompareFunc  func,
+							gpointer                data,
+							GtkDestroyNotify        destroy);
+
+
+
 static void
 validate_list_store (GtkListStore *list_store)
 {
@@ -125,7 +144,14 @@ gtk_list_store_get_type (void)
 	NULL,
 	NULL
       };
-      
+
+      static const GInterfaceInfo sortable_info =
+      {
+	(GInterfaceInitFunc) gtk_list_store_sortable_init,
+	NULL,
+	NULL
+      };
+
       list_store_type = g_type_register_static (G_TYPE_OBJECT, "GtkListStore", &list_store_info, 0);
       g_type_add_interface_static (list_store_type,
 				   GTK_TYPE_TREE_MODEL,
@@ -136,6 +162,9 @@ gtk_list_store_get_type (void)
       g_type_add_interface_static (list_store_type,
 				   GTK_TYPE_TREE_DRAG_DEST,
 				   &drag_dest_info);
+      g_type_add_interface_static (list_store_type,
+				   GTK_TYPE_TREE_SORTABLE,
+				   &sortable_info);
     }
 
   return list_store_type;
@@ -174,17 +203,26 @@ gtk_list_store_drag_source_init (GtkTreeDragSourceIface *iface)
 }
 
 static void
-gtk_list_store_drag_dest_init   (GtkTreeDragDestIface   *iface)
+gtk_list_store_drag_dest_init (GtkTreeDragDestIface *iface)
 {
   iface->drag_data_received = gtk_list_store_drag_data_received;
   iface->row_drop_possible = gtk_list_store_row_drop_possible;
 }
 
 static void
+gtk_list_store_sortable_init (GtkTreeSortableIface *iface)
+{
+  iface->get_sort_column_id = gtk_list_store_get_sort_column_id;
+  iface->set_sort_column_id = gtk_list_store_set_sort_column_id;
+  iface->sort_column_id_set_func = gtk_list_store_sort_column_id_set_func;
+}
+
+static void
 gtk_list_store_init (GtkListStore *list_store)
 {
   list_store->root = NULL;
   list_store->tail = NULL;
+  list_store->sort_list = NULL;
   list_store->stamp = g_random_int ();
   list_store->length = 0;
 }
@@ -286,6 +324,11 @@ gtk_list_store_set_n_columns (GtkListStore *list_store,
       g_free (list_store->column_headers);
     }
 
+  if (list_store->sort_list)
+    _gtk_tree_data_list_header_free (list_store->sort_list);
+
+  list_store->sort_list = _gtk_tree_data_list_header_new (n_columns, list_store->column_headers);
+
   list_store->column_headers = new_columns;
   list_store->n_columns = n_columns;
 }
@@ -815,7 +858,7 @@ insert_after (GtkListStore *list_store,
   sibling->next = new_list;
 
   /* if list was the tail, the new node is the new tail */
-  if (sibling == list_store->tail)
+  if (sibling == ((GSList *) list_store->tail))
     list_store->tail = new_list;
 
   list_store->length += 1;
@@ -1069,7 +1112,7 @@ gtk_list_store_append (GtkListStore *list_store,
   iter->user_data = g_slist_alloc ();
 
   if (list_store->tail)
-    list_store->tail->next = iter->user_data;
+    ((GSList *)list_store->tail)->next = iter->user_data;
   else
     list_store->root = iter->user_data;
 
@@ -1271,3 +1314,84 @@ gtk_list_store_row_drop_possible (GtkTreeDragDest *drag_dest,
   else
     return FALSE;
 }
+
+/* Sorting */
+static gboolean
+gtk_list_store_get_sort_column_id (GtkTreeSortable  *sortable,
+				   gint             *sort_column_id,
+				   GtkTreeSortOrder *order)
+{
+  GtkListStore *list_store = (GtkListStore *) sortable;
+
+  g_return_val_if_fail (sortable != NULL, FALSE);
+  g_return_val_if_fail (GTK_IS_LIST_STORE (sortable), FALSE);
+
+  if (list_store->sort_column_id == -1)
+    return FALSE;
+
+  if (sort_column_id)
+    * sort_column_id = list_store->sort_column_id;
+  if (order)
+    * order = list_store->order;
+  return TRUE;
+}
+
+static void
+gtk_list_store_set_sort_column_id (GtkTreeSortable  *sortable,
+				   gint              sort_column_id,
+				   GtkTreeSortOrder  order)
+{
+  GtkListStore *list_store = (GtkListStore *) sortable;
+  GList *list;
+
+  g_return_if_fail (sortable != NULL);
+  g_return_if_fail (GTK_IS_LIST_STORE (sortable));
+
+  for (list = list_store->sort_list; list; list = list->next)
+    {
+      GtkTreeDataSortHeader *header = (GtkTreeDataSortHeader*) list->data;
+      if (header->sort_column_id == sort_column_id)
+	break;
+    }
+  g_return_if_fail (list != NULL);
+
+  list_store->sort_column_id = sort_column_id;
+  list_store->order = order;
+}
+
+static void
+gtk_list_store_sort_column_id_set_func (GtkTreeSortable  *sortable,
+					gint              sort_column_id,
+					GtkTreeIterCompareFunc func,
+					gpointer          data,
+					GtkDestroyNotify  destroy)
+{
+  GtkListStore *list_store = (GtkListStore *) sortable;
+  GtkTreeDataSortHeader *header = NULL;
+  GList *list;
+
+  g_return_if_fail (sortable != NULL);
+  g_return_if_fail (GTK_IS_LIST_STORE (sortable));
+  g_return_if_fail (func != NULL);
+
+  for (list = list_store->sort_list; list; list = list->next)
+    {
+      header = (GtkTreeDataSortHeader*) list->data;
+      if (header->sort_column_id == sort_column_id)
+	break;
+    }
+
+  if (header == NULL)
+    {
+      header = g_new0 (GtkTreeDataSortHeader, 1);
+      header->sort_column_id = sort_column_id;
+      list_store->sort_list = g_list_append (list_store->sort_list, header);
+    }
+
+  if (header->destroy)
+    (* header->destroy) (header->data);
+
+  header->func = func;
+  header->data = data;
+  header->destroy = destroy;
+}
diff --git a/gtk/gtkliststore.h b/gtk/gtkliststore.h
index 4406bd74bc..5ab9a8d144 100644
--- a/gtk/gtkliststore.h
+++ b/gtk/gtkliststore.h
@@ -21,6 +21,7 @@
 #define __GTK_LIST_STORE_H__
 
 #include <gtk/gtktreemodel.h>
+#include <gtk/gtktreesortable.h>
 
 #ifdef __cplusplus
 extern "C" {
@@ -42,8 +43,11 @@ struct _GtkListStore
   /*< private >*/
   gint stamp;
   gpointer root;
-  GSList *tail;
+  gpointer tail;
+  GList *sort_list;
   gint n_columns;
+  gint sort_column_id;
+  GtkTreeSortOrder order;
   GType *column_headers;
   gint length;
 };
diff --git a/gtk/gtkmarshal.list b/gtk/gtkmarshal.list
index f193de669e..26e90358ff 100644
--- a/gtk/gtkmarshal.list
+++ b/gtk/gtkmarshal.list
@@ -38,6 +38,7 @@ NONE:STRING,INT,POINTER
 VOID:BOOLEAN
 VOID:BOXED
 VOID:BOXED,BOXED
+VOID:BOXED,POINTER
 VOID:BOXED,OBJECT
 VOID:BOXED,STRING,INT
 VOID:BOXED,UINT
diff --git a/gtk/gtkmarshalers.list b/gtk/gtkmarshalers.list
index f193de669e..26e90358ff 100644
--- a/gtk/gtkmarshalers.list
+++ b/gtk/gtkmarshalers.list
@@ -38,6 +38,7 @@ NONE:STRING,INT,POINTER
 VOID:BOOLEAN
 VOID:BOXED
 VOID:BOXED,BOXED
+VOID:BOXED,POINTER
 VOID:BOXED,OBJECT
 VOID:BOXED,STRING,INT
 VOID:BOXED,UINT
diff --git a/gtk/gtktreedatalist.c b/gtk/gtktreedatalist.c
index 0c44dc7080..0bf6152665 100644
--- a/gtk/gtktreedatalist.c
+++ b/gtk/gtktreedatalist.c
@@ -15,10 +15,13 @@
  * License along with this library; if not, write to the
  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  * Boston, MA 02111-1307, USA.
+ * 
+ * This file contains code shared between GtkTreeStore and GtkListStore.  Please
+ * do not use it.
  */
 
 #include "gtktreedatalist.h"
-
+#include <string.h>
 static GMemChunk *tree_chunk = NULL;
 #define TREE_CHUNK_PREALLOCS 64
 
@@ -250,3 +253,106 @@ _gtk_tree_data_list_node_copy (GtkTreeDataList *list,
   return new_list;
 }
 
+static gint
+gtk_tree_data_list_compare_func (GtkTreeModel *model,
+				 GtkTreeIter  *a,
+				 GtkTreeIter  *b,
+				 gpointer      user_data)
+{
+  gint column = GPOINTER_TO_INT (user_data);
+  GType type = gtk_tree_model_get_column_type (model, column);
+  GValue a_value = {0, };
+  GValue b_value = {0, };
+  gint retval;
+  
+  gtk_tree_model_get_value (model, a, column, &a_value);
+  gtk_tree_model_get_value (model, b, column, &b_value);
+
+  switch (G_TYPE_FUNDAMENTAL (type))
+    {
+    case G_TYPE_BOOLEAN:
+      retval = (g_value_get_int (&a_value) < g_value_get_int (&b_value));
+      break;
+    case G_TYPE_CHAR:
+      retval = (g_value_get_char (&a_value) < g_value_get_char (&b_value));
+      break;
+    case G_TYPE_UCHAR:
+      retval = (g_value_get_uchar (&a_value) < g_value_get_uchar (&b_value));
+      break;
+    case G_TYPE_INT:
+      retval = (g_value_get_int (&a_value) < g_value_get_int (&b_value));
+      break;
+    case G_TYPE_UINT:
+      retval = (g_value_get_uint (&a_value) < g_value_get_uint (&b_value));
+      break;
+    case G_TYPE_ENUM:
+      /* this is somewhat bogus. */
+      retval = (g_value_get_int (&a_value) < g_value_get_int (&b_value));
+      break;
+    case G_TYPE_FLAGS:
+      retval = (g_value_get_uint (&a_value) < g_value_get_uint (&b_value));
+      break;
+    case G_TYPE_FLOAT:
+      retval = (g_value_get_float (&a_value) < g_value_get_float (&b_value));
+      break;
+    case G_TYPE_DOUBLE:
+      retval = (g_value_get_double (&a_value) < g_value_get_double (&b_value));
+      break;
+    case G_TYPE_STRING:
+      retval = strcmp (g_value_get_string (&a_value), g_value_get_string (&b_value));
+      break;
+    case G_TYPE_POINTER:
+    case G_TYPE_BOXED:
+    case G_TYPE_OBJECT:
+    default:
+      g_warning ("Attempting to sort on invalid type %s\n", g_type_name (type));
+      retval = FALSE;
+      break;
+    }
+
+  g_value_unset (&a_value);
+  g_value_unset (&b_value);
+
+  return retval;
+}
+
+
+GList *
+_gtk_tree_data_list_header_new (gint   n_columns,
+				GType *types)
+{
+  GList *retval = NULL;
+
+  gint i;
+
+  for (i = 0; i < n_columns; i ++)
+    {
+      GtkTreeDataSortHeader *header;
+
+      header = g_new (GtkTreeDataSortHeader, 1);
+
+      retval = g_list_prepend (retval, header);
+      header->sort_column_id = i;
+      header->func = gtk_tree_data_list_compare_func;
+      header->destroy = NULL;
+      header->data = GINT_TO_POINTER (i);
+    }
+  return g_list_reverse (retval);
+}
+
+void
+_gtk_tree_data_list_header_free (GList *list)
+{
+  GList *tmp;
+
+  for (tmp = list; tmp; tmp = tmp->next)
+    {
+      GtkTreeDataSortHeader *header = (GtkTreeDataSortHeader *) tmp->data;
+
+      if (header->destroy)
+	(* header->destroy) (header->data);
+
+      g_free (header);
+    }
+  g_list_free (list);
+}
diff --git a/gtk/gtktreedatalist.h b/gtk/gtktreedatalist.h
index 3150b97bc0..9294395347 100644
--- a/gtk/gtktreedatalist.h
+++ b/gtk/gtktreedatalist.h
@@ -23,6 +23,7 @@
 
 #include <glib.h>
 #include <glib-object.h>
+#include "gtktreesortable.h"
 
 typedef struct _GtkTreeDataList GtkTreeDataList;
 struct _GtkTreeDataList
@@ -40,6 +41,13 @@ struct _GtkTreeDataList
   } data;
 };
 
+typedef struct _GtkTreeDataSortHeader
+{
+  gint sort_column_id;
+  GtkTreeIterCompareFunc func;
+  gpointer data;
+  GtkDestroyNotify destroy;
+} GtkTreeDataSortHeader;
 
 GtkTreeDataList *_gtk_tree_data_list_alloc          (void);
 void             _gtk_tree_data_list_free           (GtkTreeDataList *list,
@@ -54,5 +62,9 @@ void             _gtk_tree_data_list_value_to_node  (GtkTreeDataList *list,
 GtkTreeDataList *_gtk_tree_data_list_node_copy      (GtkTreeDataList *list,
                                                      GType            type);
 
+/* Header code */
+GList *_gtk_tree_data_list_header_new  (gint   n_columns,
+					GType *types);
+void   _gtk_tree_data_list_header_free (GList *header_list);
 
 #endif /* __GTK_TREE_DATA_LIST_H__ */
diff --git a/gtk/gtktreemodel.c b/gtk/gtktreemodel.c
index 4848ad07c4..f30fe8f608 100644
--- a/gtk/gtktreemodel.c
+++ b/gtk/gtktreemodel.c
@@ -42,7 +42,7 @@ gtk_tree_model_get_type (void)
 {
   static GtkType tree_model_type = 0;
 
-  if (!tree_model_type)
+  if (! tree_model_type)
     {
       static const GTypeInfo tree_model_info =
       {
@@ -68,9 +68,9 @@ gtk_tree_model_get_type (void)
 static void
 gtk_tree_model_base_init (gpointer g_class)
 {
-  static gboolean initted = FALSE;
+  static gboolean initialized = FALSE;
 
-  if (! initted)
+  if (! initialized)
     {
       g_signal_newc ("changed",
 		     GTK_TYPE_TREE_MODEL,
@@ -107,7 +107,16 @@ gtk_tree_model_base_init (gpointer g_class)
 		     gtk_marshal_VOID__BOXED,
 		     G_TYPE_NONE, 1,
 		     GTK_TYPE_TREE_PATH);
-      initted = TRUE;
+      g_signal_newc ("reordered",
+		     GTK_TYPE_TREE_MODEL,
+		     G_SIGNAL_RUN_LAST,
+		     G_STRUCT_OFFSET (GtkTreeModelIface, reordered),
+		     NULL, NULL,
+		     gtk_marshal_VOID__BOXED_POINTER,
+		     G_TYPE_NONE, 2,
+		     GTK_TYPE_TREE_PATH,
+		     G_TYPE_POINTER);
+      initialized = TRUE;
     }
 }
 
@@ -1057,6 +1066,18 @@ gtk_tree_model_deleted (GtkTreeModel *tree_model,
   g_signal_emit_by_name (tree_model, "deleted", path);
 }
 
+void
+gtk_tree_model_reordered (GtkTreeModel *tree_model,
+			  GtkTreePath  *path,
+			  gint         *new_order)
+{
+  g_return_if_fail (tree_model != NULL);
+  g_return_if_fail (GTK_IS_TREE_MODEL (tree_model));
+  g_return_if_fail (new_order != NULL);
+
+  g_signal_emit_by_name (tree_model, "reordered", path, new_order);
+}
+
 
 /**
  ** GtkTreeRowReference
diff --git a/gtk/gtktreemodel.h b/gtk/gtktreemodel.h
index 9d3c5422fa..4aaac7d834 100644
--- a/gtk/gtktreemodel.h
+++ b/gtk/gtktreemodel.h
@@ -217,6 +217,9 @@ void gtk_tree_model_has_child_toggled (GtkTreeModel *tree_model,
 				       GtkTreeIter  *iter);
 void gtk_tree_model_deleted           (GtkTreeModel *tree_model,
 				       GtkTreePath  *path);
+void gtk_tree_model_reordered         (GtkTreeModel *tree_model,
+				       GtkTreePath  *path,
+				       gint         *new_order);
 
 
 
diff --git a/gtk/gtktreeprivate.h b/gtk/gtktreeprivate.h
index 8d519c38cb..cc2f89dd35 100644
--- a/gtk/gtktreeprivate.h
+++ b/gtk/gtktreeprivate.h
@@ -92,7 +92,8 @@ struct _GtkTreeViewPrivate
 
   /* Focus code */
   gboolean header_has_focus;
-  GList *focus_column;
+  GtkTreeViewColumn *focus_column;
+  GtkTreeViewColumn *scroll_column;
 
   /* Selection stuff */
   GtkTreeRowReference *anchor;
diff --git a/gtk/gtktreesortable.c b/gtk/gtktreesortable.c
new file mode 100644
index 0000000000..b2833af60e
--- /dev/null
+++ b/gtk/gtktreesortable.c
@@ -0,0 +1,127 @@
+/* gtktreesortable.c
+ * Copyright (C) 2000  Red Hat, Inc.,  Jonathan Blandford <jrb@redhat.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library 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 "gtktreesortable.h"
+#include "gtksignal.h"
+
+static void gtk_tree_sortable_base_init (gpointer g_class);
+
+GtkType
+gtk_tree_sortable_get_type (void)
+{
+  static GtkType tree_sortable_type = 0;
+
+  if (! tree_sortable_type)
+    {
+      static const GTypeInfo tree_sortable_info =
+      {
+	sizeof (GtkTreeSortableIface), /* class_size */
+	gtk_tree_sortable_base_init,   /* base_init */
+	NULL,		/* base_finalize */
+	NULL,
+	NULL,		/* class_finalize */
+	NULL,		/* class_data */
+	0,
+	0,
+	NULL
+      };
+      tree_sortable_type = g_type_register_static (G_TYPE_INTERFACE, "GtkTreeSortable", &tree_sortable_info, 0);
+      g_type_interface_add_prerequisite (tree_sortable_type, G_TYPE_OBJECT);
+    }
+
+  return tree_sortable_type;
+}
+
+static void
+gtk_tree_sortable_base_init (gpointer g_class)
+{
+  static gboolean initialized = FALSE;
+
+  if (! initialized)
+    {
+      g_signal_newc ("sort_column_changed",
+		     GTK_TYPE_TREE_SORTABLE,
+		     G_SIGNAL_RUN_LAST,
+		     G_STRUCT_OFFSET (GtkTreeSortableIface, sort_column_changed),
+		     NULL, NULL,
+		     gtk_marshal_VOID__VOID,
+		     G_TYPE_NONE, 0);
+      initialized = TRUE;
+    }
+}
+
+gboolean
+gtk_tree_sortable_get_sort_column_id (GtkTreeSortable  *sortable,
+				      gint             *sort_column_id,
+				      GtkTreeSortOrder *order)
+{
+  GtkTreeSortableIface *iface;
+
+  g_return_val_if_fail (sortable != NULL, FALSE);
+  g_return_val_if_fail (GTK_IS_TREE_SORTABLE (sortable), FALSE);
+
+  iface = GTK_TREE_SORTABLE_GET_IFACE (sortable);
+
+  g_return_val_if_fail (iface != NULL, FALSE);
+  g_return_val_if_fail (iface->get_sort_column_id != NULL, FALSE);
+
+  return (* iface->get_sort_column_id) (sortable, sort_column_id, order);
+}
+
+void
+gtk_tree_sortable_set_sort_column_id (GtkTreeSortable  *sortable,
+				      gint              sort_column_id,
+				      GtkTreeSortOrder  order)
+{
+  GtkTreeSortableIface *iface;
+
+  g_return_if_fail (sortable != NULL);
+  g_return_if_fail (GTK_IS_TREE_SORTABLE (sortable));
+
+  iface = GTK_TREE_SORTABLE_GET_IFACE (sortable);
+
+  g_return_if_fail (iface != NULL);
+  g_return_if_fail (iface->set_sort_column_id != NULL);
+  
+  (* iface->set_sort_column_id) (sortable, sort_column_id, order);
+
+}
+
+void
+gtk_tree_sortable_sort_column_id_set_func (GtkTreeSortable        *sortable,
+					   gint                    sort_column_id,
+					   GtkTreeIterCompareFunc  func,
+					   gpointer                data,
+					   GtkDestroyNotify        destroy)
+{
+  GtkTreeSortableIface *iface;
+
+  g_return_if_fail (sortable != NULL);
+  g_return_if_fail (GTK_IS_TREE_SORTABLE (sortable));
+
+  iface = GTK_TREE_SORTABLE_GET_IFACE (sortable);
+
+  g_return_if_fail (iface != NULL);
+  g_return_if_fail (iface->sort_column_id_set_func != NULL);
+  
+  (* iface->sort_column_id_set_func) (sortable, sort_column_id, func, data, destroy);
+}
+
+
diff --git a/gtk/gtktreesortable.h b/gtk/gtktreesortable.h
index 8c7ed59b9e..85369b9bd7 100644
--- a/gtk/gtktreesortable.h
+++ b/gtk/gtktreesortable.h
@@ -28,39 +28,64 @@ extern "C" {
 
 typedef enum
 {
+  GTK_TREE_SORT_NONE,
   GTK_TREE_SORT_ASCENDING,
   GTK_TREE_SORT_DESCENDING
 } GtkTreeSortOrder;
 
 #define GTK_TYPE_TREE_SORTABLE            (gtk_tree_sortable_get_type ())
 #define GTK_TREE_SORTABLE(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), GTK_TYPE_TREE_SORTABLE, GtkTreeSortable))
+#define GTK_TREE_SORTABLE_CLASS(obj)      (G_TYPE_CHECK_CLASS_CAST ((obj), GTK_TYPE_TREE_SORTABLE, GtkTreeSortableIface))
 #define GTK_IS_TREE_SORTABLE(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GTK_TYPE_TREE_SORTABLE))
 #define GTK_TREE_SORTABLE_GET_IFACE(obj)  ((GtkTreeSortableIface *)g_type_interface_peek (((GTypeInstance *)GTK_TREE_SORTABLE (obj))->g_class, GTK_TYPE_TREE_SORTABLE))
 
+
 typedef struct _GtkTreeSortable      GtkTreeSortable; /* Dummy typedef */
 typedef struct _GtkTreeSortableIface GtkTreeSortableIface;
 
+typedef gint (* GtkTreeIterCompareFunc) (GtkTreeModel *model,
+					 GtkTreeIter  *a,
+					 GtkTreeIter  *b,
+					 gpointer      user_data);
+
+
 struct _GtkTreeSortableIface
 {
   GTypeInterface g_iface;
 
-  /* This one is a signal */
-  void         (* sort_column_changed) (GtkTreeSortable  *sortable);
-
-  /* virtual methods */
-  gboolean     (* column_sortable)     (GtkTreeSortable  *sortable,
-                                        gint              column,
-                                        GtkTreeSortOrder  order);
-  void         (* get_sort_column)     (GtkTreeSortable  *sortable,
-                                        gint             *column,
-                                        GtkTreeSortOrder *order);
-  void         (* set_sort_column)     (GtkTreeSortable  *sortable,
-                                        gint              column,
-                                        GtkTreeSortOrder  order);
+  /* signals */
+  void (* sort_column_changed) (GtkTreeSortable  *sortable);
+
+  /* virtual table */
+  gboolean (* get_sort_column_id)  (GtkTreeSortable  *sortable,
+				    gint             *sort_column_id,
+				    GtkTreeSortOrder *order);
+  void (* set_sort_column_id)      (GtkTreeSortable  *sortable,
+				    gint              sort_column_id,
+				    GtkTreeSortOrder  order);
+  void (* sort_column_id_set_func) (GtkTreeSortable  *sortable,
+				    gint              sort_column_id,
+				    GtkTreeIterCompareFunc func,
+				    gpointer          data,
+				    GtkDestroyNotify  destroy);
 };
 
 
-GType           gtk_tree_sortable_get_type   (void) G_GNUC_CONST;
+GType    gtk_tree_sortable_get_type         (void) G_GNUC_CONST;
+
+gboolean gtk_tree_sortable_get_sort_id      (GtkTreeSortable        *sortable,
+					     gint                   *sort_column_id,
+					     GtkTreeSortOrder       *order);
+void     gtk_tree_sortable_set_sort_id      (GtkTreeSortable        *sortable,
+					     gint                    sort_column_id,
+					     GtkTreeSortOrder        order);
+void     gtk_tree_sortable_sort_id_set_func (GtkTreeSortable        *sortable,
+					     gint                    sort_column_id,
+					     GtkTreeIterCompareFunc  func,
+					     gpointer                data,
+					     GtkDestroyNotify        destroy);
+
+
 
 #ifdef __cplusplus
 }
diff --git a/gtk/gtktreestore.c b/gtk/gtktreestore.c
index 5b58ac3d42..a4cba08a83 100644
--- a/gtk/gtktreestore.c
+++ b/gtk/gtktreestore.c
@@ -31,6 +31,7 @@ static void         gtk_tree_store_class_init      (GtkTreeStoreClass *tree_stor
 static void         gtk_tree_store_tree_model_init (GtkTreeModelIface *iface);
 static void         gtk_tree_store_drag_source_init(GtkTreeDragSourceIface *iface);
 static void         gtk_tree_store_drag_dest_init  (GtkTreeDragDestIface   *iface);
+static void         gtk_tree_store_sortable_init   (GtkTreeSortableIface   *iface);
 static guint        gtk_tree_store_get_flags       (GtkTreeModel      *tree_model);
 static gint         gtk_tree_store_get_n_columns   (GtkTreeModel      *tree_model);
 static GType        gtk_tree_store_get_column_type (GtkTreeModel      *tree_model,
@@ -59,18 +60,35 @@ static gboolean     gtk_tree_store_iter_parent     (GtkTreeModel      *tree_mode
 						    GtkTreeIter       *child);
 
 
+/* DND interfaces */
 static gboolean gtk_tree_store_drag_data_delete   (GtkTreeDragSource *drag_source,
-                                                   GtkTreePath       *path);
+						   GtkTreePath       *path);
 static gboolean gtk_tree_store_drag_data_get      (GtkTreeDragSource *drag_source,
-                                                   GtkTreePath       *path,
-                                                   GtkSelectionData  *selection_data);
+						   GtkTreePath       *path,
+						   GtkSelectionData  *selection_data);
 static gboolean gtk_tree_store_drag_data_received (GtkTreeDragDest   *drag_dest,
-                                                   GtkTreePath       *dest,
-                                                   GtkSelectionData  *selection_data);
+						   GtkTreePath       *dest,
+						   GtkSelectionData  *selection_data);
 static gboolean gtk_tree_store_row_drop_possible  (GtkTreeDragDest   *drag_dest,
-                                                   GtkTreeModel      *src_model,
-                                                   GtkTreePath       *src_path,
-                                                   GtkTreePath       *dest_path);
+						   GtkTreeModel      *src_model,
+						   GtkTreePath       *src_path,
+						   GtkTreePath       *dest_path);
+
+/* Sortable Interfaces */
+
+static void gtk_tree_store_get_sort_column_id      (GtkTreeSortable        *sortable,
+						    gint                   *sort_column_id,
+						    GtkTreeSortOrder       *order);
+static void gtk_tree_store_set_sort_column_id      (GtkTreeSortable        *sortable,
+						    gint                    sort_column_id,
+						    GtkTreeSortOrder        order);
+static void gtk_tree_store_sort_column_id_set_func (GtkTreeSortable        *sortable,
+						    gint                    sort_column_id,
+						    GtkTreeIterCompareFunc  func,
+						    gpointer                data,
+						    GtkDestroyNotify        destroy);
+
+
 
 static void     validate_gnode                    (GNode *node);
 
@@ -80,7 +98,7 @@ validate_tree (GtkTreeStore *tree_store)
   if (gtk_debug_flags & GTK_DEBUG_TREE)
     {
       g_assert (G_NODE (tree_store->root)->parent == NULL);
-      
+
       validate_gnode (G_NODE (tree_store->root));
     }
 }
@@ -125,21 +143,29 @@ gtk_tree_store_get_type (void)
 	NULL,
 	NULL
       };
-      
+
+      static const GInterfaceInfo sortable_info =
+      {
+	(GInterfaceInitFunc) gtk_tree_store_sortable_init,
+	NULL,
+	NULL
+      };
+
       tree_store_type = g_type_register_static (G_TYPE_OBJECT, "GtkTreeStore", &tree_store_info, 0);
 
       g_type_add_interface_static (tree_store_type,
 				   GTK_TYPE_TREE_MODEL,
 				   &tree_model_info);
-
       g_type_add_interface_static (tree_store_type,
 				   GTK_TYPE_TREE_DRAG_SOURCE,
 				   &drag_source_info);
       g_type_add_interface_static (tree_store_type,
 				   GTK_TYPE_TREE_DRAG_DEST,
 				   &drag_dest_info);
+      g_type_add_interface_static (tree_store_type,
+				   GTK_TYPE_TREE_SORTABLE,
+				   &sortable_info);
 
-      
     }
 
   return tree_store_type;
@@ -178,17 +204,26 @@ gtk_tree_store_drag_source_init (GtkTreeDragSourceIface *iface)
 }
 
 static void
-gtk_tree_store_drag_dest_init   (GtkTreeDragDestIface   *iface)
+gtk_tree_store_drag_dest_init (GtkTreeDragDestIface *iface)
 {
   iface->drag_data_received = gtk_tree_store_drag_data_received;
   iface->row_drop_possible = gtk_tree_store_row_drop_possible;
 }
 
 static void
+gtk_tree_store_sortable_init (GtkTreeSortableIface *iface)
+{
+  iface->get_sort_column_id = NULL;
+  iface->set_sort_column_id = NULL;
+  iface->sort_column_id_set_func = NULL;
+}
+
+static void
 gtk_tree_store_init (GtkTreeStore *tree_store)
 {
   tree_store->root = g_node_new (NULL);
   tree_store->stamp = g_random_int ();
+  tree_store->sort_list = NULL;
 }
 
 GtkTreeStore *
@@ -228,6 +263,14 @@ gtk_tree_store_new_with_types (gint n_columns,
   return retval;
 }
 
+/**
+ * gtk_tree_store_set_n_columns:
+ * @tree_store: 
+ * @n_columns: 
+ * 
+ * As a side effect of calling this function, all sort columns that overlap with
+ * the current number of columns will be removed.
+ **/
 void
 gtk_tree_store_set_n_columns (GtkTreeStore *tree_store,
 			      gint          n_columns)
@@ -252,6 +295,11 @@ gtk_tree_store_set_n_columns (GtkTreeStore *tree_store,
       g_free (tree_store->column_headers);
     }
 
+  if (tree_store->sort_list)
+    _gtk_tree_data_list_header_free (tree_store->sort_list);
+
+  tree_store->sort_list = _gtk_tree_data_list_header_new (n_columns, tree_store->column_headers);
+
   tree_store->column_headers = new_columns;
   tree_store->n_columns = n_columns;
 }
@@ -261,12 +309,12 @@ gtk_tree_store_set_n_columns (GtkTreeStore *tree_store,
  * @tree_store: a #GtkTreeStore
  * @column: column number
  * @type: type of the data to be stored in @column
- * 
+ *
  * Supported types include: %G_TYPE_UINT, %G_TYPE_INT, %G_TYPE_UCHAR,
  * %G_TYPE_CHAR, %G_TYPE_BOOLEAN, %G_TYPE_POINTER, %G_TYPE_FLOAT,
  * %G_TYPE_DOUBLE, %G_TYPE_STRING, %G_TYPE_OBJECT, and %G_TYPE_BOXED, along with
  * subclasses of those types such as %GDK_TYPE_PIXBUF.
- * 
+ *
  **/
 void
 gtk_tree_store_set_column_type (GtkTreeStore *tree_store,
@@ -325,7 +373,7 @@ gtk_tree_store_get_path (GtkTreeModel *tree_model,
   GtkTreePath *retval;
   GNode *tmp_node;
   gint i = 0;
-  
+
   g_return_val_if_fail (tree_model != NULL, NULL);
   g_return_val_if_fail (GTK_IS_TREE_STORE (tree_model), NULL);
   g_return_val_if_fail (iter != NULL, NULL);
@@ -334,7 +382,7 @@ gtk_tree_store_get_path (GtkTreeModel *tree_model,
   validate_tree ((GtkTreeStore*)tree_model);
 
   g_assert (G_NODE (iter->user_data)->parent != NULL);
-  
+
   if (G_NODE (iter->user_data)->parent == G_NODE (GTK_TREE_STORE (tree_model)->root))
     {
       retval = gtk_tree_path_new ();
@@ -343,7 +391,7 @@ gtk_tree_store_get_path (GtkTreeModel *tree_model,
   else
     {
       GtkTreeIter tmp_iter = *iter;
-      
+
       tmp_iter.user_data = G_NODE (iter->user_data)->parent;
 
       retval = gtk_tree_store_get_path (tree_model,
@@ -418,7 +466,7 @@ gtk_tree_store_iter_next (GtkTreeModel  *tree_model,
 			  GtkTreeIter   *iter)
 {
   g_return_val_if_fail (iter->user_data != NULL, FALSE);
-  
+
   if (G_NODE (iter->user_data)->next)
     {
       iter->user_data = G_NODE (iter->user_data)->next;
@@ -436,7 +484,7 @@ gtk_tree_store_iter_children (GtkTreeModel *tree_model,
   GNode *children;
 
   g_return_val_if_fail (parent == NULL || parent->user_data != NULL, FALSE);
-  
+
   if (parent)
     children = G_NODE (parent->user_data)->children;
   else
@@ -475,7 +523,7 @@ gtk_tree_store_iter_n_children (GtkTreeModel *tree_model,
   g_return_val_if_fail (GTK_IS_TREE_STORE (tree_model), 0);
   g_return_val_if_fail (iter != NULL, FALSE);
   g_return_val_if_fail (iter->user_data != NULL, FALSE);
-  
+
   if (iter == NULL)
     node = G_NODE (GTK_TREE_STORE (tree_model)->root)->children;
   else
@@ -526,13 +574,13 @@ gtk_tree_store_iter_parent (GtkTreeModel *tree_model,
 			    GtkTreeIter  *child)
 {
   GNode *parent;
-  
+
   g_return_val_if_fail (iter != NULL, FALSE);
   g_return_val_if_fail (iter->user_data != NULL, FALSE);
 
   parent = G_NODE (child->user_data)->parent;
 
-  g_assert (parent != NULL);  
+  g_assert (parent != NULL);
 
   if (parent != GTK_TREE_STORE (tree_model)->root)
     {
@@ -648,7 +696,7 @@ gtk_tree_store_set_cell (GtkTreeStore *tree_store,
  *
  * See gtk_tree_store_set(); this version takes a va_list for
  * use by language bindings.
- * 
+ *
  **/
 void
 gtk_tree_store_set_valist (GtkTreeStore *tree_store,
@@ -701,7 +749,7 @@ gtk_tree_store_set_valist (GtkTreeStore *tree_store,
  * @tree_store: a #GtkTreeStore
  * @iter: row iterator
  * @Varargs: pairs of column number and value, terminated with -1
- * 
+ *
  * Sets the value of one or more cells in the row referenced by @iter.
  * The variable argument list should contain integer column numbers,
  * each column number followed by the value to be set. For example,
@@ -737,7 +785,7 @@ gtk_tree_store_remove (GtkTreeStore *model,
   parent = G_NODE (iter->user_data)->parent;
 
   g_assert (parent != NULL);
-  
+
   if (G_NODE (iter->user_data)->data)
     _gtk_tree_data_list_free ((GtkTreeDataList *) G_NODE (iter->user_data)->data,
 			      model->column_headers);
@@ -767,7 +815,7 @@ gtk_tree_store_insert (GtkTreeStore *model,
 {
   GtkTreePath *path;
   GNode *parent_node;
-  
+
   g_return_if_fail (model != NULL);
   g_return_if_fail (GTK_IS_TREE_STORE (model));
 
@@ -779,7 +827,7 @@ gtk_tree_store_insert (GtkTreeStore *model,
   iter->stamp = model->stamp;
   iter->user_data = g_node_new (NULL);
   g_node_insert (parent_node, position, G_NODE (iter->user_data));
-  
+
   path = gtk_tree_store_get_path (GTK_TREE_MODEL (model), iter);
   gtk_tree_model_inserted (GTK_TREE_MODEL (model), path, iter);
 
@@ -797,12 +845,12 @@ gtk_tree_store_insert_before (GtkTreeStore *model,
   GtkTreePath *path;
   GNode *parent_node = NULL;
   GNode *new_node;
-  
+
   g_return_if_fail (model != NULL);
   g_return_if_fail (GTK_IS_TREE_STORE (model));
   g_return_if_fail (iter != NULL);
 
-  new_node = g_node_new (NULL);  
+  new_node = g_node_new (NULL);
 
   if (parent == NULL && sibling == NULL)
     parent_node = model->root;
@@ -823,7 +871,7 @@ gtk_tree_store_insert_before (GtkTreeStore *model,
 
   iter->stamp = model->stamp;
   iter->user_data = new_node;
-  
+
   path = gtk_tree_store_get_path (GTK_TREE_MODEL (model), iter);
   gtk_tree_model_inserted (GTK_TREE_MODEL (model), path, iter);
 
@@ -841,7 +889,7 @@ gtk_tree_store_insert_after (GtkTreeStore *model,
   GtkTreePath *path;
   GNode *parent_node;
   GNode *new_node;
-  
+
   g_return_if_fail (model != NULL);
   g_return_if_fail (GTK_IS_TREE_STORE (model));
   g_return_if_fail (iter != NULL);
@@ -861,14 +909,14 @@ gtk_tree_store_insert_after (GtkTreeStore *model,
       parent_node = G_NODE (parent->user_data);
     }
 
-  
+
   g_node_insert_after (parent_node,
 		       sibling ? G_NODE (sibling->user_data) : NULL,
                        new_node);
-  
+
   iter->stamp = model->stamp;
   iter->user_data = new_node;
-  
+
   path = gtk_tree_store_get_path (GTK_TREE_MODEL (model), iter);
   gtk_tree_model_inserted (GTK_TREE_MODEL (model), path, iter);
 
@@ -883,7 +931,7 @@ gtk_tree_store_prepend (GtkTreeStore *model,
 			GtkTreeIter  *parent)
 {
   GNode *parent_node;
-  
+
   g_return_if_fail (model != NULL);
   g_return_if_fail (GTK_IS_TREE_STORE (model));
   g_return_if_fail (iter != NULL);
@@ -892,16 +940,16 @@ gtk_tree_store_prepend (GtkTreeStore *model,
     parent_node = model->root;
   else
     parent_node = parent->user_data;
-  
+
   if (parent_node->children == NULL)
     {
       GtkTreePath *path;
-      
+
       iter->stamp = model->stamp;
       iter->user_data = g_node_new (NULL);
-      
+
       g_node_prepend (parent_node, iter->user_data);
-      
+
       if (parent_node != model->root)
 	{
 	  path = gtk_tree_store_get_path (GTK_TREE_MODEL (model), parent);
@@ -933,7 +981,7 @@ gtk_tree_store_append (GtkTreeStore *model,
   g_return_if_fail (model != NULL);
   g_return_if_fail (GTK_IS_TREE_STORE (model));
   g_return_if_fail (iter != NULL);
-  
+
   if (parent == NULL)
     parent_node = model->root;
   else
@@ -945,7 +993,7 @@ gtk_tree_store_append (GtkTreeStore *model,
 
       iter->stamp = model->stamp;
       iter->user_data = g_node_new (NULL);
-      
+
       g_node_append (parent_node, G_NODE (iter->user_data));
 
       if (parent_node != model->root)
@@ -958,7 +1006,7 @@ gtk_tree_store_append (GtkTreeStore *model,
 	{
 	  path = gtk_tree_store_get_path (GTK_TREE_MODEL (model), iter);
 	}
-      
+
       gtk_tree_model_inserted (GTK_TREE_MODEL (model), path, iter);
       gtk_tree_path_free (path);
     }
@@ -1007,7 +1055,7 @@ gtk_tree_store_drag_data_delete (GtkTreeDragSource *drag_source,
   GtkTreeIter iter;
 
   g_return_val_if_fail (GTK_IS_TREE_STORE (drag_source), FALSE);
-  
+
   if (gtk_tree_model_get_iter (GTK_TREE_MODEL (drag_source),
                                &iter,
                                path))
@@ -1060,7 +1108,7 @@ copy_node_data (GtkTreeStore *tree_store,
   GtkTreeDataList *copy_iter = NULL;
   GtkTreePath *path;
   gint col;
-  
+
   col = 0;
   while (dl)
     {
@@ -1094,7 +1142,7 @@ recursive_node_copy (GtkTreeStore *tree_store,
   GtkTreeModel *model;
 
   model = GTK_TREE_MODEL (tree_store);
-  
+
   copy_node_data (tree_store, src_iter, dest_iter);
 
   if (gtk_tree_model_iter_children (model,
@@ -1112,7 +1160,7 @@ recursive_node_copy (GtkTreeStore *tree_store,
           gtk_tree_store_append (tree_store,
                                  &copy,
                                  dest_iter);
-          
+
           recursive_node_copy (tree_store, &child, &copy);
         }
       while (gtk_tree_model_iter_next (model, &child));
@@ -1129,14 +1177,14 @@ gtk_tree_store_drag_data_received (GtkTreeDragDest   *drag_dest,
   GtkTreeModel *src_model = NULL;
   GtkTreePath *src_path = NULL;
   gboolean retval = FALSE;
-  
+
   g_return_val_if_fail (GTK_IS_TREE_STORE (drag_dest), FALSE);
 
   tree_model = GTK_TREE_MODEL (drag_dest);
   tree_store = GTK_TREE_STORE (drag_dest);
 
   validate_tree (tree_store);
-  
+
   if (gtk_selection_data_get_tree_row (selection_data,
                                        &src_model,
                                        &src_path) &&
@@ -1146,7 +1194,7 @@ gtk_tree_store_drag_data_received (GtkTreeDragDest   *drag_dest,
       GtkTreeIter src_iter;
       GtkTreeIter dest_iter;
       GtkTreePath *prev;
-      
+
       if (!gtk_tree_model_get_iter (src_model,
                                     &src_iter,
                                     src_path))
@@ -1156,17 +1204,17 @@ gtk_tree_store_drag_data_received (GtkTreeDragDest   *drag_dest,
 
       /* Get the path to insert _after_ (dest is the path to insert _before_) */
       prev = gtk_tree_path_copy (dest);
-      
+
       if (!gtk_tree_path_prev (prev))
         {
           GtkTreeIter dest_parent;
           GtkTreePath *parent;
           GtkTreeIter *dest_parent_p;
-          
+
           /* dest was the first spot at the current depth; which means
            * we are supposed to prepend.
            */
-          
+
           /* Get the parent, NULL if parent is the root */
           dest_parent_p = NULL;
           parent = gtk_tree_path_copy (dest);
@@ -1179,11 +1227,11 @@ gtk_tree_store_drag_data_received (GtkTreeDragDest   *drag_dest,
             }
           gtk_tree_path_free (parent);
           parent = NULL;
-          
+
           gtk_tree_store_prepend (GTK_TREE_STORE (tree_model),
                                   &dest_iter,
                                   dest_parent_p);
-          
+
           retval = TRUE;
         }
       else
@@ -1203,11 +1251,11 @@ gtk_tree_store_drag_data_received (GtkTreeDragDest   *drag_dest,
         }
 
       gtk_tree_path_free (prev);
-      
+
       /* If we succeeded in creating dest_iter, walk src_iter tree branch,
        * duplicating it below dest_iter.
        */
-      
+
       if (retval)
         {
           recursive_node_copy (tree_store,
@@ -1224,11 +1272,11 @@ gtk_tree_store_drag_data_received (GtkTreeDragDest   *drag_dest,
     }
 
  out:
-  
+
   if (src_path)
     gtk_tree_path_free (src_path);
-  
-  return retval;  
+
+  return retval;
 }
 
 static gboolean
@@ -1240,7 +1288,7 @@ gtk_tree_store_row_drop_possible (GtkTreeDragDest *drag_dest,
   /* can only drag to ourselves */
   if (src_model != GTK_TREE_MODEL (drag_dest))
     return FALSE;
-  
+
   /* Can't drop into ourself. */
   if (gtk_tree_path_is_ancestor (src_path,
                                  dest_path))
@@ -1264,20 +1312,47 @@ gtk_tree_store_row_drop_possible (GtkTreeDragDest *drag_dest,
             return FALSE;
           }
       }
-    
+
     if (tmp)
       gtk_tree_path_free (tmp);
   }
-  
+
   /* Can otherwise drop anywhere. */
   return TRUE;
 }
-     
+
+
+static void
+gtk_tree_store_get_sort_column_id (GtkTreeSortable  *sortable,
+				   gint             *sort_column_id,
+				   GtkTreeSortOrder *order)
+{
+
+}
+
+static void
+gtk_tree_store_set_sort_column_id (GtkTreeSortable  *sortable,
+				   gint              sort_column_id,
+				   GtkTreeSortOrder  order)
+{
+
+}
+
+static void
+gtk_tree_store_sort_column_id_set_func (GtkTreeSortable        *sortable,
+					gint                    sort_column_id,
+					GtkTreeIterCompareFunc  func,
+					gpointer                data,
+					GtkDestroyNotify        destroy)
+{
+
+}
+
 static void
 validate_gnode (GNode* node)
 {
   GNode *iter;
-  
+
   iter = node->children;
   while (iter != NULL)
     {
diff --git a/gtk/gtktreestore.h b/gtk/gtktreestore.h
index 87a9413f50..d38ca5a551 100644
--- a/gtk/gtktreestore.h
+++ b/gtk/gtktreestore.h
@@ -40,6 +40,7 @@ struct _GtkTreeStore
 {
   GObject parent;
 
+  GList *sort_list;
   gint stamp;
   gpointer root;
   gpointer last;
diff --git a/gtk/gtktreeview.c b/gtk/gtktreeview.c
index 3c24a4c517..761ab3b641 100644
--- a/gtk/gtktreeview.c
+++ b/gtk/gtktreeview.c
@@ -186,7 +186,9 @@ static void     gtk_tree_view_has_child_toggled    (GtkTreeModel     *model,
 static void     gtk_tree_view_deleted              (GtkTreeModel     *model,
 						    GtkTreePath      *path,
 						    gpointer          data);
-
+static void     gtk_tree_view_reordered            (GtkTreeModel     *model,
+						    GtkTreePath      *parent,
+						    gint             *new_order);
 /* Internal functions */
 static void     gtk_tree_view_unref_tree           (GtkTreeView      *tree_view,
 						    GtkRBTree        *tree);
@@ -244,9 +246,7 @@ static void     gtk_tree_view_clamp_node_visible   (GtkTreeView      *tree_view,
 static gboolean gtk_tree_view_maybe_begin_dragging_row (GtkTreeView      *tree_view,
                                                         GdkEventMotion   *event);
 static void     _gtk_tree_view_update_col_width    (GtkTreeView      *tree_view);
-static void     gtk_tree_view_row_activated        (GtkTreeView      *tree_view,
-						    GtkTreePath      *path,
-						    GtkTreeViewColumn *column);
+
 
 static GtkContainerClass *parent_class = NULL;
 static guint tree_view_signals[LAST_SIGNAL] = { 0 };
@@ -325,6 +325,7 @@ gtk_tree_view_class_init (GtkTreeViewClass *class)
 
   container_class->forall = gtk_tree_view_forall;
   container_class->remove = gtk_tree_view_remove;
+  container_class->set_focus_child = gtk_tree_view_set_focus_child;
   container_class->focus = gtk_tree_view_focus;
 
   class->set_scroll_adjustments = gtk_tree_view_set_adjustments;
@@ -720,7 +721,6 @@ gtk_tree_view_unrealize (GtkWidget *widget)
   GtkTreeView *tree_view;
   GList *list;
 
-  g_return_if_fail (widget != NULL);
   g_return_if_fail (GTK_IS_TREE_VIEW (widget));
 
   tree_view = GTK_TREE_VIEW (widget);
@@ -798,7 +798,6 @@ gtk_tree_view_map (GtkWidget *widget)
   GList *tmp_list;
   GtkTreeView *tree_view;
 
-  g_return_if_fail (widget != NULL);
   g_return_if_fail (GTK_IS_TREE_VIEW (widget));
 
   tree_view = GTK_TREE_VIEW (widget);
@@ -855,7 +854,6 @@ gtk_tree_view_size_request (GtkWidget      *widget,
   GtkTreeView *tree_view;
   GList *tmp_list;
 
-  g_return_if_fail (widget != NULL);
   g_return_if_fail (GTK_IS_TREE_VIEW (widget));
 
   tree_view = GTK_TREE_VIEW (widget);
@@ -920,7 +918,6 @@ gtk_tree_view_size_allocate (GtkWidget     *widget,
   GList *tmp_list;
   GtkTreeView *tree_view;
 
-  g_return_if_fail (widget != NULL);
   g_return_if_fail (GTK_IS_TREE_VIEW (widget));
 
   widget->allocation = *allocation;
@@ -1130,7 +1127,6 @@ gtk_tree_view_bin_expose (GtkWidget      *widget,
   GtkTreePath *drag_dest_path;
   GList *last_column;
 
-  g_return_val_if_fail (widget != NULL, FALSE);
   g_return_val_if_fail (GTK_IS_TREE_VIEW (widget), FALSE);
 
   tree_view = GTK_TREE_VIEW (widget);
@@ -1494,7 +1490,6 @@ gtk_tree_view_expose (GtkWidget      *widget,
 {
   GtkTreeView *tree_view;
 
-  g_return_val_if_fail (widget != NULL, FALSE);
   g_return_val_if_fail (GTK_IS_TREE_VIEW (widget), FALSE);
 
   tree_view = GTK_TREE_VIEW (widget);
@@ -1688,7 +1683,6 @@ gtk_tree_view_enter_notify (GtkWidget        *widget,
   GtkRBNode *node;
   gint new_y;
 
-  g_return_val_if_fail (widget != NULL, FALSE);
   g_return_val_if_fail (GTK_IS_TREE_VIEW (widget), FALSE);
 
   tree_view = GTK_TREE_VIEW (widget);
@@ -1732,7 +1726,6 @@ gtk_tree_view_leave_notify (GtkWidget        *widget,
 {
   GtkTreeView *tree_view;
 
-  g_return_val_if_fail (widget != NULL, FALSE);
   g_return_val_if_fail (GTK_IS_TREE_VIEW (widget), FALSE);
 
   tree_view = GTK_TREE_VIEW (widget);
@@ -1759,7 +1752,6 @@ gtk_tree_view_button_press (GtkWidget      *widget,
   GdkRectangle background_area;
   GdkRectangle cell_area;
 
-  g_return_val_if_fail (widget != NULL, FALSE);
   g_return_val_if_fail (GTK_IS_TREE_VIEW (widget), FALSE);
   g_return_val_if_fail (event != NULL, FALSE);
 
@@ -1954,7 +1946,6 @@ gtk_tree_view_button_release (GtkWidget      *widget,
 {
   GtkTreeView *tree_view;
 
-  g_return_val_if_fail (widget != NULL, FALSE);
   g_return_val_if_fail (GTK_IS_TREE_VIEW (widget), FALSE);
   g_return_val_if_fail (event != NULL, FALSE);
 
@@ -2052,7 +2043,19 @@ static void
 gtk_tree_view_set_focus_child (GtkContainer *container,
 			       GtkWidget    *child)
 {
+  GtkTreeView *tree_view = GTK_TREE_VIEW (container);
+  GList *list;
+
+  for (list = tree_view->priv->columns; list; list = list->next)
+    {
+      if (GTK_TREE_VIEW_COLUMN (list->data)->button == child)
+	{
+	  tree_view->priv->focus_column = GTK_TREE_VIEW_COLUMN (list->data);
+	  break;
+	}
+    }
 
+  (* parent_class->set_focus_child) (container, child);
 }
 static void
 gtk_tree_view_draw_focus (GtkWidget *widget)
@@ -2064,7 +2067,6 @@ gtk_tree_view_draw_focus (GtkWidget *widget)
   gint x, y;
   gint width, height;
 
-  g_return_if_fail (widget != NULL);
   g_return_if_fail (GTK_IS_TREE_VIEW (widget));
 
   tree_view = GTK_TREE_VIEW (widget);
@@ -2099,11 +2101,10 @@ gtk_tree_view_draw_focus (GtkWidget *widget)
   height = BACKGROUND_HEIGHT (node) - 1;
   if (tree_view->priv->focus_column != NULL)
     {
-      GtkTreeViewColumn *column = GTK_TREE_VIEW_COLUMN (tree_view->priv->focus_column->data);
       gboolean visible;
       gboolean can_focus;
 
-      g_object_get (G_OBJECT (column->cell),
+      g_object_get (G_OBJECT (tree_view->priv->focus_column->cell),
 		    "can_activate", &can_focus,
 		    "visible", &visible,
 		    NULL);
@@ -2114,15 +2115,15 @@ gtk_tree_view_draw_focus (GtkWidget *widget)
 	  gint x_offset;
 	  gint y_offset;
 
-	  cell_area.x = column->button->allocation.x;
+	  cell_area.x = tree_view->priv->focus_column->button->allocation.x;
 	  cell_area.y = y;
-	  cell_area.width = column->displayed_width;
+	  cell_area.width = tree_view->priv->focus_column->displayed_width;
 	  cell_area.height = CELL_HEIGHT (node);
 
 	  gtk_tree_model_get_iter (tree_view->priv->model, &iter, cursor_path);
-	  gtk_tree_view_column_set_cell_data (column, tree_view->priv->model, &iter);
+	  gtk_tree_view_column_set_cell_data (tree_view->priv->focus_column, tree_view->priv->model, &iter);
 
-	  gtk_cell_renderer_get_size (column->cell, GTK_WIDGET (tree_view), &cell_area, &x_offset, &y_offset, &width, &height);
+	  gtk_cell_renderer_get_size (tree_view->priv->focus_column->cell, GTK_WIDGET (tree_view), &cell_area, &x_offset, &y_offset, &width, &height);
 	  width += 2;
 	  height += 2;
 	  x = cell_area.x + x_offset - 1;
@@ -2147,7 +2148,6 @@ gtk_tree_view_focus_in (GtkWidget     *widget,
 {
   GtkTreeView *tree_view;
 
-  g_return_val_if_fail (widget != NULL, FALSE);
   g_return_val_if_fail (GTK_IS_TREE_VIEW (widget), FALSE);
   g_return_val_if_fail (event != NULL, FALSE);
 
@@ -2166,7 +2166,6 @@ static gint
 gtk_tree_view_focus_out (GtkWidget     *widget,
 			 GdkEventFocus *event)
 {
-  g_return_val_if_fail (widget != NULL, FALSE);
   g_return_val_if_fail (GTK_IS_TREE_VIEW (widget), FALSE);
   g_return_val_if_fail (event != NULL, FALSE);
 
@@ -2223,7 +2222,7 @@ gtk_tree_view_header_focus (GtkTreeView      *tree_view,
       if (focus_child == NULL)
 	{
 	  if (tree_view->priv->focus_column != NULL)
-	    focus_child = GTK_TREE_VIEW_COLUMN (tree_view->priv->focus_column->data)->button;
+	    focus_child = tree_view->priv->focus_column->button;
 	  else
 	    focus_child = GTK_TREE_VIEW_COLUMN (first_column->data)->button;
 	  gtk_widget_grab_focus (focus_child);
@@ -2236,7 +2235,7 @@ gtk_tree_view_header_focus (GtkTreeView      *tree_view,
       if (focus_child == NULL)
 	{
 	  if (tree_view->priv->focus_column != NULL)
-	    focus_child = GTK_TREE_VIEW_COLUMN (tree_view->priv->focus_column->data)->button;
+	    focus_child = tree_view->priv->focus_column->button;
 	  else if (dir == GTK_DIR_LEFT)
 	    focus_child = GTK_TREE_VIEW_COLUMN (last_column->data)->button;
 	  else
@@ -2308,7 +2307,7 @@ gtk_tree_view_header_focus (GtkTreeView      *tree_view,
 	if (GTK_TREE_VIEW_COLUMN (tmp_list->data)->button == focus_child)
 	  break;
 
-      tree_view->priv->focus_column = tmp_list;
+      tree_view->priv->focus_column = GTK_TREE_VIEW_COLUMN (tmp_list->data);
 
       /* If the following isn't true, then the view is smaller then the scrollpane.
        */
@@ -2334,6 +2333,13 @@ gtk_tree_view_header_focus (GtkTreeView      *tree_view,
 /* We make the assumption that if container->focus_child != NULL, the focus must
  * be in the header.  For now, this is accurate.  It may not be in the future.
  */
+
+/* The sordid relationship between focus_column and scroll_column:
+ *
+ * The focus_column represents the column that currently has keyboard focus, and
+ * is used when navigating columns by keyboard.  scroll_column is used for
+ * handling scrolling by keyboard, such that in cases.
+ */
 static gint
 gtk_tree_view_focus (GtkContainer     *container,
 		     GtkDirectionType  direction)
@@ -2345,7 +2351,6 @@ gtk_tree_view_focus (GtkContainer     *container,
   GtkRBNode *cursor_node;
   GtkTreePath *cursor_path;
 
-  g_return_val_if_fail (container != NULL, FALSE);
   g_return_val_if_fail (GTK_IS_TREE_VIEW (container), FALSE);
   g_return_val_if_fail (GTK_WIDGET_VISIBLE (container), FALSE);
 
@@ -2614,7 +2619,6 @@ gtk_tree_view_remove (GtkContainer *container,
   GtkTreeViewChild *child = NULL;
   GList *tmp_list;
 
-  g_return_if_fail (container != NULL);
   g_return_if_fail (GTK_IS_TREE_VIEW (container));
 
   tree_view = GTK_TREE_VIEW (container);
@@ -2663,7 +2667,6 @@ gtk_tree_view_forall (GtkContainer *container,
   GtkTreeViewColumn *column;
   GList *tmp_list;
 
-  g_return_if_fail (container != NULL);
   g_return_if_fail (GTK_IS_TREE_VIEW (container));
   g_return_if_fail (callback != NULL);
 
@@ -3002,6 +3005,15 @@ gtk_tree_view_deleted (GtkTreeModel *model,
   _gtk_tree_view_update_size (GTK_TREE_VIEW (data));
 }
 
+
+static void
+gtk_tree_view_reordered (GtkTreeModel *model,
+			 GtkTreePath  *parent,
+			 gint         *new_order)
+{
+  
+}
+
 /* Internal tree functions */
 static gint
 gtk_tree_view_insert_iter_height (GtkTreeView *tree_view,
@@ -3832,7 +3844,6 @@ gtk_tree_view_new_with_model (GtkTreeModel *model)
 GtkTreeModel *
 gtk_tree_view_get_model (GtkTreeView *tree_view)
 {
-  g_return_val_if_fail (tree_view != NULL, NULL);
   g_return_val_if_fail (GTK_IS_TREE_VIEW (tree_view), NULL);
 
   return tree_view->priv->model;
@@ -3866,6 +3877,11 @@ gtk_tree_view_setup_model (GtkTreeView *tree_view)
 		     gtk_tree_view_deleted,
 		     tree_view,
 		     FALSE);
+  g_signal_connectc (tree_view->priv->model,
+		     "reordered",
+		     gtk_tree_view_reordered,
+		     tree_view,
+		     FALSE);
 
   if (tree_view->priv->columns == NULL)
     return;
@@ -3898,7 +3914,6 @@ void
 gtk_tree_view_set_model (GtkTreeView  *tree_view,
 			 GtkTreeModel *model)
 {
-  g_return_if_fail (tree_view != NULL);
   g_return_if_fail (GTK_IS_TREE_VIEW (tree_view));
 
   if (model != NULL)
@@ -3924,6 +3939,10 @@ gtk_tree_view_set_model (GtkTreeView  *tree_view,
 						G_SIGNAL_MATCH_FUNC,
 						0, 0, NULL,
 						gtk_tree_view_deleted, NULL);
+	  g_signal_handlers_disconnect_matched (G_OBJECT (tree_view->priv->model),
+						G_SIGNAL_MATCH_FUNC,
+						0, 0, NULL,
+						gtk_tree_view_reordered, NULL);
 	  _gtk_rbtree_free (tree_view->priv->tree);
 	}
 
@@ -3963,7 +3982,6 @@ gtk_tree_view_set_model (GtkTreeView  *tree_view,
 GtkTreeSelection *
 gtk_tree_view_get_selection (GtkTreeView *tree_view)
 {
-  g_return_val_if_fail (tree_view != NULL, NULL);
   g_return_val_if_fail (GTK_IS_TREE_VIEW (tree_view), NULL);
 
   if (tree_view->priv->selection == NULL)
@@ -3985,7 +4003,6 @@ gtk_tree_view_get_selection (GtkTreeView *tree_view)
 GtkAdjustment *
 gtk_tree_view_get_hadjustment (GtkTreeView *tree_view)
 {
-  g_return_val_if_fail (tree_view != NULL, NULL);
   g_return_val_if_fail (GTK_IS_TREE_VIEW (tree_view), NULL);
 
   if (tree_view->priv->hadjustment == NULL)
@@ -4005,7 +4022,6 @@ void
 gtk_tree_view_set_hadjustment (GtkTreeView   *tree_view,
 			       GtkAdjustment *adjustment)
 {
-  g_return_if_fail (tree_view != NULL);
   g_return_if_fail (GTK_IS_TREE_VIEW (tree_view));
 
   gtk_tree_view_set_adjustments (tree_view,
@@ -4027,7 +4043,6 @@ gtk_tree_view_set_hadjustment (GtkTreeView   *tree_view,
 GtkAdjustment *
 gtk_tree_view_get_vadjustment (GtkTreeView *tree_view)
 {
-  g_return_val_if_fail (tree_view != NULL, NULL);
   g_return_val_if_fail (GTK_IS_TREE_VIEW (tree_view), NULL);
 
   if (tree_view->priv->vadjustment == NULL)
@@ -4047,7 +4062,6 @@ void
 gtk_tree_view_set_vadjustment (GtkTreeView   *tree_view,
 			       GtkAdjustment *adjustment)
 {
-  g_return_if_fail (tree_view != NULL);
   g_return_if_fail (GTK_IS_TREE_VIEW (tree_view));
 
   gtk_tree_view_set_adjustments (tree_view,
@@ -4072,7 +4086,6 @@ gtk_tree_view_set_adjustments (GtkTreeView   *tree_view,
 {
   gboolean need_adjust = FALSE;
 
-  g_return_if_fail (tree_view != NULL);
   g_return_if_fail (GTK_IS_TREE_VIEW (tree_view));
 
   if (hadj)
@@ -4138,7 +4151,6 @@ gtk_tree_view_set_adjustments (GtkTreeView   *tree_view,
 gboolean
 gtk_tree_view_get_headers_visible (GtkTreeView *tree_view)
 {
-  g_return_val_if_fail (tree_view != NULL, FALSE);
   g_return_val_if_fail (GTK_IS_TREE_VIEW (tree_view), FALSE);
 
   return GTK_TREE_VIEW_FLAG_SET (tree_view, GTK_TREE_VIEW_HEADERS_VISIBLE);
@@ -4159,7 +4171,6 @@ gtk_tree_view_set_headers_visible (GtkTreeView *tree_view,
   GList *list;
   GtkTreeViewColumn *column;
 
-  g_return_if_fail (tree_view != NULL);
   g_return_if_fail (GTK_IS_TREE_VIEW (tree_view));
 
   headers_visible = !! headers_visible;
@@ -4220,7 +4231,6 @@ gtk_tree_view_columns_autosize (GtkTreeView *tree_view)
   GList *list;
   GtkTreeViewColumn *column;
 
-  g_return_if_fail (tree_view != NULL);
   g_return_if_fail (GTK_IS_TREE_VIEW (tree_view));
 
   for (list = tree_view->priv->columns; list; list = list->next)
@@ -4249,7 +4259,6 @@ gtk_tree_view_set_headers_clickable (GtkTreeView *tree_view,
 {
   GList *list;
 
-  g_return_if_fail (tree_view != NULL);
   g_return_if_fail (GTK_IS_TREE_VIEW (tree_view));
   g_return_if_fail (tree_view->priv->model != NULL);
 
@@ -4272,9 +4281,7 @@ gint
 gtk_tree_view_append_column (GtkTreeView       *tree_view,
 			     GtkTreeViewColumn *column)
 {
-  g_return_val_if_fail (tree_view != NULL, -1);
   g_return_val_if_fail (GTK_IS_TREE_VIEW (tree_view), -1);
-  g_return_val_if_fail (column != NULL, -1);
   g_return_val_if_fail (GTK_IS_TREE_VIEW_COLUMN (column), -1);
   g_return_val_if_fail (column->tree_view == NULL, -1);
 
@@ -4295,16 +4302,13 @@ gint
 gtk_tree_view_remove_column (GtkTreeView       *tree_view,
                              GtkTreeViewColumn *column)
 {
-  g_return_val_if_fail (tree_view != NULL, -1);
   g_return_val_if_fail (GTK_IS_TREE_VIEW (tree_view), -1);
-  g_return_val_if_fail (column != NULL, -1);
   g_return_val_if_fail (GTK_IS_TREE_VIEW_COLUMN (column), -1);
   g_return_val_if_fail (column->tree_view == GTK_WIDGET (tree_view), -1);
 
   _gtk_tree_view_column_unset_tree_view (column);
 
-  if (tree_view->priv->focus_column &&
-      GTK_TREE_VIEW_COLUMN (tree_view->priv->focus_column->data) == column)
+  if (tree_view->priv->focus_column == column)
     tree_view->priv->focus_column = NULL;
 
   tree_view->priv->columns = g_list_remove (tree_view->priv->columns, column);
@@ -4351,9 +4355,7 @@ gtk_tree_view_insert_column (GtkTreeView       *tree_view,
                              GtkTreeViewColumn *column,
                              gint               position)
 {
-  g_return_val_if_fail (tree_view != NULL, -1);
   g_return_val_if_fail (GTK_IS_TREE_VIEW (tree_view), -1);
-  g_return_val_if_fail (column != NULL, -1);
   g_return_val_if_fail (GTK_IS_TREE_VIEW_COLUMN (column), -1);
   g_return_val_if_fail (column->tree_view == NULL, -1);
 
@@ -4416,7 +4418,6 @@ gtk_tree_view_insert_column_with_attributes (GtkTreeView     *tree_view,
   va_list args;
   gint column_id;
 
-  g_return_val_if_fail (tree_view != NULL, -1);
   g_return_val_if_fail (GTK_IS_TREE_VIEW (tree_view), -1);
 
   column = gtk_tree_view_column_new ();
@@ -4457,7 +4458,6 @@ GtkTreeViewColumn *
 gtk_tree_view_get_column (GtkTreeView *tree_view,
 			  gint         n)
 {
-  g_return_val_if_fail (tree_view != NULL, NULL);
   g_return_val_if_fail (GTK_IS_TREE_VIEW (tree_view), NULL);
   g_return_val_if_fail (tree_view->priv->model != NULL, NULL);
 
@@ -4553,7 +4553,6 @@ gtk_tree_view_scroll_to_cell (GtkTreeView       *tree_view,
    * we do incremental reflow for trees
    */
 
-  g_return_if_fail (tree_view != NULL);
   g_return_if_fail (GTK_IS_TREE_VIEW (tree_view));
   g_return_if_fail (row_align >= 0.0);
   g_return_if_fail (row_align <= 1.0);
@@ -5050,7 +5049,6 @@ gtk_tree_view_expand_all_helper (GtkRBTree  *tree,
 void
 gtk_tree_view_expand_all (GtkTreeView *tree_view)
 {
-  g_return_if_fail (tree_view != NULL);
   g_return_if_fail (GTK_IS_TREE_VIEW (tree_view));
   g_return_if_fail (tree_view->priv->tree != NULL);
 
@@ -5101,7 +5099,6 @@ gtk_tree_view_collapse_all_helper (GtkRBTree  *tree,
 void
 gtk_tree_view_collapse_all (GtkTreeView *tree_view)
 {
-  g_return_if_fail (tree_view != NULL);
   g_return_if_fail (GTK_IS_TREE_VIEW (tree_view));
   g_return_if_fail (tree_view->priv->tree != NULL);
 
@@ -5140,7 +5137,6 @@ gtk_tree_view_expand_row (GtkTreeView *tree_view,
   GtkRBTree *tree;
   GtkRBNode *node;
 
-  g_return_val_if_fail (tree_view != NULL, FALSE);
   g_return_val_if_fail (GTK_IS_TREE_VIEW (tree_view), FALSE);
   g_return_val_if_fail (tree_view->priv->model != NULL, FALSE);
   g_return_val_if_fail (path != NULL, FALSE);
@@ -5193,7 +5189,6 @@ gtk_tree_view_collapse_row (GtkTreeView *tree_view,
   GtkRBNode *node;
   GtkTreeIter iter;
 
-  g_return_val_if_fail (tree_view != NULL, FALSE);
   g_return_val_if_fail (GTK_IS_TREE_VIEW (tree_view), FALSE);
   g_return_val_if_fail (tree_view->priv->tree != NULL, FALSE);
   g_return_val_if_fail (path != NULL, FALSE);
@@ -5243,7 +5238,6 @@ gtk_tree_view_get_visible_rect (GtkTreeView  *tree_view,
 {
   GtkWidget *widget;
 
-  g_return_if_fail (tree_view != NULL);
   g_return_if_fail (GTK_IS_TREE_VIEW (tree_view));
 
   widget = GTK_WIDGET (tree_view);