[sysprof] Add forked copies of gtktreestore.[ch] and gtktreedatalist.[ch]



commit 6fc4ba4f45fa26b6695411cb3d29ecb41a527ee6
Author: Søren Sandmann Pedersen <ssp redhat com>
Date:   Mon Aug 17 04:15:29 2009 -0400

    Add forked copies of gtktreestore.[ch] and gtktreedatalist.[ch]

 Makefile.am       |    4 +
 footreedatalist.c |  555 +++++++++
 footreedatalist.h |   82 ++
 footreestore.c    | 3337 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 footreestore.h    |  159 +++
 5 files changed, 4137 insertions(+), 0 deletions(-)
---
diff --git a/Makefile.am b/Makefile.am
index 5ffd9ad..a0b5a58 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -41,6 +41,10 @@ if BUILD_GUI
 
 sysprof_SOURCES =				\
 	$(SYSPROF_CORE)				\
+	footreestore.c				\
+	footreestore.h				\
+	footreedatalist.h			\
+	footreedatalist.c			\
 	treeviewutils.h				\
 	treeviewutils.c				\
 	sysprof.c
diff --git a/footreedatalist.c b/footreedatalist.c
new file mode 100644
index 0000000..be169ba
--- /dev/null
+++ b/footreedatalist.c
@@ -0,0 +1,555 @@
+/* gtktreedatalist.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.
+ * 
+ * This file contains code shared between GtkTreeStore and GtkListStore.  Please
+ * do not use it.
+ */
+
+#include "footreedatalist.h"
+#include <string.h>
+
+/* node allocation
+ */
+FooTreeDataList *
+_foo_tree_data_list_alloc (void)
+{
+  FooTreeDataList *list;
+
+  list = g_slice_new0 (FooTreeDataList);
+
+  return list;
+}
+
+void
+_foo_tree_data_list_free (FooTreeDataList *list,
+			  GType           *column_headers)
+{
+  FooTreeDataList *tmp, *next;
+  gint i = 0;
+
+  tmp = list;
+
+  while (tmp)
+    {
+      next = tmp->next;
+      if (g_type_is_a (column_headers [i], G_TYPE_STRING))
+	g_free ((gchar *) tmp->data.v_pointer);
+      else if (g_type_is_a (column_headers [i], G_TYPE_OBJECT) && tmp->data.v_pointer != NULL)
+	g_object_unref (tmp->data.v_pointer);
+      else if (g_type_is_a (column_headers [i], G_TYPE_BOXED) && tmp->data.v_pointer != NULL)
+	g_boxed_free (column_headers [i], (gpointer) tmp->data.v_pointer);
+
+      g_slice_free (FooTreeDataList, tmp);
+      i++;
+      tmp = next;
+    }
+}
+
+gboolean
+_foo_tree_data_list_check_type (GType type)
+{
+  gint i = 0;
+  static const GType type_list[] =
+  {
+    G_TYPE_BOOLEAN,
+    G_TYPE_CHAR,
+    G_TYPE_UCHAR,
+    G_TYPE_INT,
+    G_TYPE_UINT,
+    G_TYPE_LONG,
+    G_TYPE_ULONG,
+    G_TYPE_INT64,
+    G_TYPE_UINT64,
+    G_TYPE_ENUM,
+    G_TYPE_FLAGS,
+    G_TYPE_FLOAT,
+    G_TYPE_DOUBLE,
+    G_TYPE_STRING,
+    G_TYPE_POINTER,
+    G_TYPE_BOXED,
+    G_TYPE_OBJECT,
+    G_TYPE_INVALID
+  };
+
+  if (! G_TYPE_IS_VALUE_TYPE (type))
+    return FALSE;
+
+
+  while (type_list[i] != G_TYPE_INVALID)
+    {
+      if (g_type_is_a (type, type_list[i]))
+	return TRUE;
+      i++;
+    }
+  return FALSE;
+}
+
+static inline GType
+get_fundamental_type (GType type)
+{
+  GType result;
+
+  result = G_TYPE_FUNDAMENTAL (type);
+
+  if (result == G_TYPE_INTERFACE)
+    {
+      if (g_type_is_a (type, G_TYPE_OBJECT))
+	result = G_TYPE_OBJECT;
+    }
+
+  return result;
+}
+void
+_foo_tree_data_list_node_to_value (FooTreeDataList *list,
+				   GType            type,
+				   GValue          *value)
+{
+  g_value_init (value, type);
+
+  switch (get_fundamental_type (type))
+    {
+    case G_TYPE_BOOLEAN:
+      g_value_set_boolean (value, (gboolean) list->data.v_int);
+      break;
+    case G_TYPE_CHAR:
+      g_value_set_char (value, (gchar) list->data.v_char);
+      break;
+    case G_TYPE_UCHAR:
+      g_value_set_uchar (value, (guchar) list->data.v_uchar);
+      break;
+    case G_TYPE_INT:
+      g_value_set_int (value, (gint) list->data.v_int);
+      break;
+    case G_TYPE_UINT:
+      g_value_set_uint (value, (guint) list->data.v_uint);
+      break;
+    case G_TYPE_LONG:
+      g_value_set_long (value, list->data.v_long);
+      break;
+    case G_TYPE_ULONG:
+      g_value_set_ulong (value, list->data.v_ulong);
+      break;
+    case G_TYPE_INT64:
+      g_value_set_int64 (value, list->data.v_int64);
+      break;
+    case G_TYPE_UINT64:
+      g_value_set_uint64 (value, list->data.v_uint64);
+      break;
+    case G_TYPE_ENUM:
+      g_value_set_enum (value, list->data.v_int);
+      break;
+    case G_TYPE_FLAGS:
+      g_value_set_flags (value, list->data.v_uint);
+      break;
+    case G_TYPE_FLOAT:
+      g_value_set_float (value, (gfloat) list->data.v_float);
+      break;
+    case G_TYPE_DOUBLE:
+      g_value_set_double (value, (gdouble) list->data.v_double);
+      break;
+    case G_TYPE_STRING:
+      g_value_set_string (value, (gchar *) list->data.v_pointer);
+      break;
+    case G_TYPE_POINTER:
+      g_value_set_pointer (value, (gpointer) list->data.v_pointer);
+      break;
+    case G_TYPE_BOXED:
+      g_value_set_boxed (value, (gpointer) list->data.v_pointer);
+      break;
+    case G_TYPE_OBJECT:
+      g_value_set_object (value, (GObject *) list->data.v_pointer);
+      break;
+    default:
+      g_warning ("%s: Unsupported type (%s) retrieved.", G_STRLOC, g_type_name (value->g_type));
+      break;
+    }
+}
+
+void
+_foo_tree_data_list_value_to_node (FooTreeDataList *list,
+				   GValue          *value)
+{
+  switch (get_fundamental_type (G_VALUE_TYPE (value)))
+    {
+    case G_TYPE_BOOLEAN:
+      list->data.v_int = g_value_get_boolean (value);
+      break;
+    case G_TYPE_CHAR:
+      list->data.v_char = g_value_get_char (value);
+      break;
+    case G_TYPE_UCHAR:
+      list->data.v_uchar = g_value_get_uchar (value);
+      break;
+    case G_TYPE_INT:
+      list->data.v_int = g_value_get_int (value);
+      break;
+    case G_TYPE_UINT:
+      list->data.v_uint = g_value_get_uint (value);
+      break;
+    case G_TYPE_LONG:
+      list->data.v_long = g_value_get_long (value);
+      break;
+    case G_TYPE_ULONG:
+      list->data.v_ulong = g_value_get_ulong (value);
+      break;
+    case G_TYPE_INT64:
+      list->data.v_int64 = g_value_get_int64 (value);
+      break;
+    case G_TYPE_UINT64:
+      list->data.v_uint64 = g_value_get_uint64 (value);
+      break;
+    case G_TYPE_ENUM:
+      list->data.v_int = g_value_get_enum (value);
+      break;
+    case G_TYPE_FLAGS:
+      list->data.v_uint = g_value_get_flags (value);
+      break;
+    case G_TYPE_POINTER:
+      list->data.v_pointer = g_value_get_pointer (value);
+      break;
+    case G_TYPE_FLOAT:
+      list->data.v_float = g_value_get_float (value);
+      break;
+    case G_TYPE_DOUBLE:
+      list->data.v_double = g_value_get_double (value);
+      break;
+    case G_TYPE_STRING:
+      g_free (list->data.v_pointer);
+      list->data.v_pointer = g_value_dup_string (value);
+      break;
+    case G_TYPE_OBJECT:
+      if (list->data.v_pointer)
+	g_object_unref (list->data.v_pointer);
+      list->data.v_pointer = g_value_dup_object (value);
+      break;
+    case G_TYPE_BOXED:
+      if (list->data.v_pointer)
+	g_boxed_free (G_VALUE_TYPE (value), list->data.v_pointer);
+      list->data.v_pointer = g_value_dup_boxed (value);
+      break;
+    default:
+      g_warning ("%s: Unsupported type (%s) stored.", G_STRLOC, g_type_name (G_VALUE_TYPE (value)));
+      break;
+    }
+}
+
+FooTreeDataList *
+_foo_tree_data_list_node_copy (FooTreeDataList *list,
+                               GType            type)
+{
+  FooTreeDataList *new_list;
+
+  g_return_val_if_fail (list != NULL, NULL);
+  
+  new_list = _foo_tree_data_list_alloc ();
+  new_list->next = NULL;
+
+  switch (get_fundamental_type (type))
+    {
+    case G_TYPE_BOOLEAN:
+    case G_TYPE_CHAR:
+    case G_TYPE_UCHAR:
+    case G_TYPE_INT:
+    case G_TYPE_UINT:
+    case G_TYPE_LONG:
+    case G_TYPE_ULONG:
+    case G_TYPE_INT64:
+    case G_TYPE_UINT64:
+    case G_TYPE_ENUM:
+    case G_TYPE_FLAGS:
+    case G_TYPE_POINTER:
+    case G_TYPE_FLOAT:
+    case G_TYPE_DOUBLE:
+      new_list->data = list->data;
+      break;
+    case G_TYPE_STRING:
+      new_list->data.v_pointer = g_strdup (list->data.v_pointer);
+      break;
+    case G_TYPE_OBJECT:
+    case G_TYPE_INTERFACE:
+      new_list->data.v_pointer = list->data.v_pointer;
+      if (new_list->data.v_pointer)
+	g_object_ref (new_list->data.v_pointer);
+      break;
+    case G_TYPE_BOXED:
+      if (list->data.v_pointer)
+	new_list->data.v_pointer = g_boxed_copy (type, list->data.v_pointer);
+      else
+	new_list->data.v_pointer = NULL;
+      break;
+    default:
+      g_warning ("Unsupported node type (%s) copied.", g_type_name (type));
+      break;
+    }
+
+  return new_list;
+}
+
+gint
+_foo_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;
+  const gchar *stra, *strb;
+
+  gtk_tree_model_get_value (model, a, column, &a_value);
+  gtk_tree_model_get_value (model, b, column, &b_value);
+
+  switch (get_fundamental_type (type))
+    {
+    case G_TYPE_BOOLEAN:
+      if (g_value_get_boolean (&a_value) < g_value_get_boolean (&b_value))
+	retval = -1;
+      else if (g_value_get_boolean (&a_value) == g_value_get_boolean (&b_value))
+	retval = 0;
+      else
+	retval = 1;
+      break;
+    case G_TYPE_CHAR:
+      if (g_value_get_char (&a_value) < g_value_get_char (&b_value))
+	retval = -1;
+      else if (g_value_get_char (&a_value) == g_value_get_char (&b_value))
+	retval = 0;
+      else
+	retval = 1;
+      break;
+    case G_TYPE_UCHAR:
+      if (g_value_get_uchar (&a_value) < g_value_get_uchar (&b_value))
+	retval = -1;
+      else if (g_value_get_uchar (&a_value) == g_value_get_uchar (&b_value))
+	retval = 0;
+      else
+	retval = 1;
+      break;
+    case G_TYPE_INT:
+      if (g_value_get_int (&a_value) < g_value_get_int (&b_value))
+	retval = -1;
+      else if (g_value_get_int (&a_value) == g_value_get_int (&b_value))
+	retval = 0;
+      else
+	retval = 1;
+      break;
+    case G_TYPE_UINT:
+      if (g_value_get_uint (&a_value) < g_value_get_uint (&b_value))
+	retval = -1;
+      else if (g_value_get_uint (&a_value) == g_value_get_uint (&b_value))
+	retval = 0;
+      else
+	retval = 1;
+      break;
+    case G_TYPE_LONG:
+      if (g_value_get_long (&a_value) < g_value_get_long (&b_value))
+	retval = -1;
+      else if (g_value_get_long (&a_value) == g_value_get_long (&b_value))
+	retval = 0;
+      else
+	retval = 1;
+      break;
+    case G_TYPE_ULONG:
+      if (g_value_get_ulong (&a_value) < g_value_get_ulong (&b_value))
+	retval = -1;
+      else if (g_value_get_ulong (&a_value) == g_value_get_ulong (&b_value))
+	retval = 0;
+      else
+	retval = 1;
+      break;
+    case G_TYPE_INT64:
+      if (g_value_get_int64 (&a_value) < g_value_get_int64 (&b_value))
+	retval = -1;
+      else if (g_value_get_int64 (&a_value) == g_value_get_int64 (&b_value))
+	retval = 0;
+      else
+	retval = 1;
+      break;
+    case G_TYPE_UINT64:
+      if (g_value_get_uint64 (&a_value) < g_value_get_uint64 (&b_value))
+	retval = -1;
+      else if (g_value_get_uint64 (&a_value) == g_value_get_uint64 (&b_value))
+	retval = 0;
+      else
+	retval = 1;
+      break;
+    case G_TYPE_ENUM:
+      /* this is somewhat bogus. */
+      if (g_value_get_enum (&a_value) < g_value_get_enum (&b_value))
+	retval = -1;
+      else if (g_value_get_enum (&a_value) == g_value_get_enum (&b_value))
+	retval = 0;
+      else
+	retval = 1;
+      break;
+    case G_TYPE_FLAGS:
+      /* this is even more bogus. */
+      if (g_value_get_flags (&a_value) < g_value_get_flags (&b_value))
+	retval = -1;
+      else if (g_value_get_flags (&a_value) == g_value_get_flags (&b_value))
+	retval = 0;
+      else
+	retval = 1;
+      break;
+    case G_TYPE_FLOAT:
+      if (g_value_get_float (&a_value) < g_value_get_float (&b_value))
+	retval = -1;
+      else if (g_value_get_float (&a_value) == g_value_get_float (&b_value))
+	retval = 0;
+      else
+	retval = 1;
+      break;
+    case G_TYPE_DOUBLE:
+      if (g_value_get_double (&a_value) < g_value_get_double (&b_value))
+	retval = -1;
+      else if (g_value_get_double (&a_value) == g_value_get_double (&b_value))
+	retval = 0;
+      else
+	retval = 1;
+      break;
+    case G_TYPE_STRING:
+      stra = g_value_get_string (&a_value);
+      strb = g_value_get_string (&b_value);
+      if (stra == NULL) stra = "";
+      if (strb == NULL) strb = "";
+      retval = g_utf8_collate (stra, strb);
+      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 *
+_foo_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_slice_new (GtkTreeDataSortHeader);
+
+      retval = g_list_prepend (retval, header);
+      header->sort_column_id = i;
+      header->func = _foo_tree_data_list_compare_func;
+      header->destroy = NULL;
+      header->data = GINT_TO_POINTER (i);
+    }
+  return g_list_reverse (retval);
+}
+
+void
+_foo_tree_data_list_header_free (GList *list)
+{
+  GList *tmp;
+
+  for (tmp = list; tmp; tmp = tmp->next)
+    {
+      GtkTreeDataSortHeader *header = (GtkTreeDataSortHeader *) tmp->data;
+
+      if (header->destroy)
+	{
+	  GDestroyNotify d = header->destroy;
+
+	  header->destroy = NULL;
+	  d (header->data);
+	}
+
+      g_slice_free (GtkTreeDataSortHeader, header);
+    }
+  g_list_free (list);
+}
+
+GtkTreeDataSortHeader *
+_foo_tree_data_list_get_header (GList   *header_list,
+				gint     sort_column_id)
+{
+  GtkTreeDataSortHeader *header = NULL;
+
+  for (; header_list; header_list = header_list->next)
+    {
+      header = (GtkTreeDataSortHeader*) header_list->data;
+      if (header->sort_column_id == sort_column_id)
+	return header;
+    }
+  return NULL;
+}
+
+
+GList *
+_foo_tree_data_list_set_header (GList                  *header_list,
+				gint                    sort_column_id,
+				GtkTreeIterCompareFunc  func,
+				gpointer                data,
+				GDestroyNotify          destroy)
+{
+  GList *list = header_list;
+  GtkTreeDataSortHeader *header = NULL;
+
+  for (; list; list = list->next)
+    {
+      header = (GtkTreeDataSortHeader*) list->data;
+      if (header->sort_column_id == sort_column_id)
+	break;
+      header = NULL;
+
+      if (list->next == NULL)
+	break;
+    }
+  
+  if (header == NULL)
+    {
+      header = g_slice_new0 (GtkTreeDataSortHeader);
+      header->sort_column_id = sort_column_id;
+      if (list)
+	list = g_list_append (list, header);
+      else
+	header_list = g_list_append (header_list, header);
+    }
+
+  if (header->destroy)
+    {
+      GDestroyNotify d = header->destroy;
+      
+      header->destroy = NULL;
+      d (header->data);
+    }
+  
+  header->func = func;
+  header->data = data;
+  header->destroy = destroy;
+
+  return header_list;
+}
diff --git a/footreedatalist.h b/footreedatalist.h
new file mode 100644
index 0000000..eb4274d
--- /dev/null
+++ b/footreedatalist.h
@@ -0,0 +1,82 @@
+/* gtktreedatalist.h
+ * 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.
+ */
+
+#ifndef __GTK_TREE_DATA_LIST_H__
+#define __GTK_TREE_DATA_LIST_H__
+
+#include <gtk/gtk.h>
+
+typedef struct _FooTreeDataList FooTreeDataList;
+struct _FooTreeDataList
+{
+  FooTreeDataList *next;
+
+  union {
+    gint	   v_int;
+    gint8          v_char;
+    guint8         v_uchar;
+    guint	   v_uint;
+    glong	   v_long;
+    gulong	   v_ulong;
+    gint64	   v_int64;
+    guint64        v_uint64;
+    gfloat	   v_float;
+    gdouble        v_double;
+    gpointer	   v_pointer;
+  } data;
+};
+
+typedef struct _GtkTreeDataSortHeader
+{
+  gint sort_column_id;
+  GtkTreeIterCompareFunc func;
+  gpointer data;
+  GDestroyNotify destroy;
+} GtkTreeDataSortHeader;
+
+FooTreeDataList *_foo_tree_data_list_alloc          (void);
+void             _foo_tree_data_list_free           (FooTreeDataList *list,
+						     GType           *column_headers);
+gboolean         _foo_tree_data_list_check_type     (GType            type);
+void             _foo_tree_data_list_node_to_value  (FooTreeDataList *list,
+						     GType            type,
+						     GValue          *value);
+void             _foo_tree_data_list_value_to_node  (FooTreeDataList *list,
+						     GValue          *value);
+
+FooTreeDataList *_foo_tree_data_list_node_copy      (FooTreeDataList *list,
+                                                     GType            type);
+
+/* Header code */
+gint                   _foo_tree_data_list_compare_func (GtkTreeModel *model,
+							 GtkTreeIter  *a,
+							 GtkTreeIter  *b,
+							 gpointer      user_data);
+GList *                _foo_tree_data_list_header_new  (gint          n_columns,
+							GType        *types);
+void                   _foo_tree_data_list_header_free (GList        *header_list);
+GtkTreeDataSortHeader *_foo_tree_data_list_get_header  (GList        *header_list,
+							gint          sort_column_id);
+GList                 *_foo_tree_data_list_set_header  (GList                  *header_list,
+							gint                    sort_column_id,
+							GtkTreeIterCompareFunc  func,
+							gpointer                data,
+							GDestroyNotify          destroy);
+
+#endif /* __GTK_TREE_DATA_LIST_H__ */
diff --git a/footreestore.c b/footreestore.c
new file mode 100644
index 0000000..e668401
--- /dev/null
+++ b/footreestore.c
@@ -0,0 +1,3337 @@
+/* gtktreestore.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 "config.h"
+#include <string.h>
+#include <gtk/gtk.h>
+#include <gobject/gvaluecollector.h>
+#include "footreedatalist.h"
+
+#define G_NODE(node) ((GNode *)node)
+#define GTK_TREE_STORE_IS_SORTED(tree) (((GtkTreeStore*)(tree))->sort_column_id != GTK_TREE_SORTABLE_UNSORTED_SORT_COLUMN_ID)
+#define VALID_ITER(iter, tree_store) ((iter)!= NULL && (iter)->user_data != NULL && ((GtkTreeStore*)(tree_store))->stamp == (iter)->stamp)
+
+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 void         gtk_tree_store_buildable_init  (GtkBuildableIface      *iface);
+static void         gtk_tree_store_finalize        (GObject           *object);
+static GtkTreeModelFlags 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,
+						    gint               index);
+static gboolean     gtk_tree_store_get_iter        (GtkTreeModel      *tree_model,
+						    GtkTreeIter       *iter,
+						    GtkTreePath       *path);
+static GtkTreePath *gtk_tree_store_get_path        (GtkTreeModel      *tree_model,
+						    GtkTreeIter       *iter);
+static void         gtk_tree_store_get_value       (GtkTreeModel      *tree_model,
+						    GtkTreeIter       *iter,
+						    gint               column,
+						    GValue            *value);
+static gboolean     gtk_tree_store_iter_next       (GtkTreeModel      *tree_model,
+						    GtkTreeIter       *iter);
+static gboolean     gtk_tree_store_iter_children   (GtkTreeModel      *tree_model,
+						    GtkTreeIter       *iter,
+						    GtkTreeIter       *parent);
+static gboolean     gtk_tree_store_iter_has_child  (GtkTreeModel      *tree_model,
+						    GtkTreeIter       *iter);
+static gint         gtk_tree_store_iter_n_children (GtkTreeModel      *tree_model,
+						    GtkTreeIter       *iter);
+static gboolean     gtk_tree_store_iter_nth_child  (GtkTreeModel      *tree_model,
+						    GtkTreeIter       *iter,
+						    GtkTreeIter       *parent,
+						    gint               n);
+static gboolean     gtk_tree_store_iter_parent     (GtkTreeModel      *tree_model,
+						    GtkTreeIter       *iter,
+						    GtkTreeIter       *child);
+
+
+static void gtk_tree_store_set_n_columns   (GtkTreeStore *tree_store,
+					    gint          n_columns);
+static void gtk_tree_store_set_column_type (GtkTreeStore *tree_store,
+					    gint          column,
+					    GType         type);
+
+static void gtk_tree_store_increment_stamp (GtkTreeStore  *tree_store);
+
+
+/* DND interfaces */
+static gboolean real_gtk_tree_store_row_draggable   (GtkTreeDragSource *drag_source,
+						   GtkTreePath       *path);
+static gboolean gtk_tree_store_drag_data_delete   (GtkTreeDragSource *drag_source,
+						   GtkTreePath       *path);
+static gboolean gtk_tree_store_drag_data_get      (GtkTreeDragSource *drag_source,
+						   GtkTreePath       *path,
+						   GtkSelectionData  *selection_data);
+static gboolean gtk_tree_store_drag_data_received (GtkTreeDragDest   *drag_dest,
+						   GtkTreePath       *dest,
+						   GtkSelectionData  *selection_data);
+static gboolean gtk_tree_store_row_drop_possible  (GtkTreeDragDest   *drag_dest,
+						   GtkTreePath       *dest_path,
+						   GtkSelectionData  *selection_data);
+
+/* Sortable Interfaces */
+
+static void     gtk_tree_store_sort                    (GtkTreeStore           *tree_store);
+static void     gtk_tree_store_sort_iter_changed       (GtkTreeStore           *tree_store,
+							GtkTreeIter            *iter,
+							gint                    column,
+							gboolean                emit_signal);
+static gboolean gtk_tree_store_get_sort_column_id      (GtkTreeSortable        *sortable,
+							gint                   *sort_column_id,
+							GtkSortType            *order);
+static void     gtk_tree_store_set_sort_column_id      (GtkTreeSortable        *sortable,
+							gint                    sort_column_id,
+							GtkSortType             order);
+static void     gtk_tree_store_set_sort_func           (GtkTreeSortable        *sortable,
+							gint                    sort_column_id,
+							GtkTreeIterCompareFunc  func,
+							gpointer                data,
+							GDestroyNotify          destroy);
+static void     gtk_tree_store_set_default_sort_func   (GtkTreeSortable        *sortable,
+							GtkTreeIterCompareFunc  func,
+							gpointer                data,
+							GDestroyNotify          destroy);
+static gboolean gtk_tree_store_has_default_sort_func   (GtkTreeSortable        *sortable);
+
+
+/* buildable */
+
+static gboolean gtk_tree_store_buildable_custom_tag_start (GtkBuildable  *buildable,
+							   GtkBuilder    *builder,
+							   GObject       *child,
+							   const gchar   *tagname,
+							   GMarkupParser *parser,
+							   gpointer      *data);
+static void     gtk_tree_store_buildable_custom_finished (GtkBuildable 	 *buildable,
+							  GtkBuilder   	 *builder,
+							  GObject      	 *child,
+							  const gchar  	 *tagname,
+							  gpointer     	  user_data);
+
+static void     validate_gnode                         (GNode *node);
+
+static void     gtk_tree_store_move                    (GtkTreeStore           *tree_store,
+                                                        GtkTreeIter            *iter,
+                                                        GtkTreeIter            *position,
+                                                        gboolean                before);
+
+
+static inline void
+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));
+    }
+}
+
+G_DEFINE_TYPE_WITH_CODE (GtkTreeStore, gtk_tree_store, G_TYPE_OBJECT,
+			 G_IMPLEMENT_INTERFACE (GTK_TYPE_TREE_MODEL,
+						gtk_tree_store_tree_model_init)
+			 G_IMPLEMENT_INTERFACE (GTK_TYPE_TREE_DRAG_SOURCE,
+						gtk_tree_store_drag_source_init)
+			 G_IMPLEMENT_INTERFACE (GTK_TYPE_TREE_DRAG_DEST,
+						gtk_tree_store_drag_dest_init)
+			 G_IMPLEMENT_INTERFACE (GTK_TYPE_TREE_SORTABLE,
+						gtk_tree_store_sortable_init)
+			 G_IMPLEMENT_INTERFACE (GTK_TYPE_BUILDABLE,
+						gtk_tree_store_buildable_init))
+
+static void
+gtk_tree_store_class_init (GtkTreeStoreClass *class)
+{
+  GObjectClass *object_class;
+
+  object_class = (GObjectClass *) class;
+
+  object_class->finalize = gtk_tree_store_finalize;
+}
+
+static void
+gtk_tree_store_tree_model_init (GtkTreeModelIface *iface)
+{
+  iface->get_flags = gtk_tree_store_get_flags;
+  iface->get_n_columns = gtk_tree_store_get_n_columns;
+  iface->get_column_type = gtk_tree_store_get_column_type;
+  iface->get_iter = gtk_tree_store_get_iter;
+  iface->get_path = gtk_tree_store_get_path;
+  iface->get_value = gtk_tree_store_get_value;
+  iface->iter_next = gtk_tree_store_iter_next;
+  iface->iter_children = gtk_tree_store_iter_children;
+  iface->iter_has_child = gtk_tree_store_iter_has_child;
+  iface->iter_n_children = gtk_tree_store_iter_n_children;
+  iface->iter_nth_child = gtk_tree_store_iter_nth_child;
+  iface->iter_parent = gtk_tree_store_iter_parent;
+}
+
+static void
+gtk_tree_store_drag_source_init (GtkTreeDragSourceIface *iface)
+{
+  iface->row_draggable = real_gtk_tree_store_row_draggable;
+  iface->drag_data_delete = gtk_tree_store_drag_data_delete;
+  iface->drag_data_get = gtk_tree_store_drag_data_get;
+}
+
+static void
+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 = gtk_tree_store_get_sort_column_id;
+  iface->set_sort_column_id = gtk_tree_store_set_sort_column_id;
+  iface->set_sort_func = gtk_tree_store_set_sort_func;
+  iface->set_default_sort_func = gtk_tree_store_set_default_sort_func;
+  iface->has_default_sort_func = gtk_tree_store_has_default_sort_func;
+}
+
+void
+gtk_tree_store_buildable_init (GtkBuildableIface *iface)
+{
+  iface->custom_tag_start = gtk_tree_store_buildable_custom_tag_start;
+  iface->custom_finished = gtk_tree_store_buildable_custom_finished;
+}
+
+static void
+gtk_tree_store_init (GtkTreeStore *tree_store)
+{
+  tree_store->root = g_node_new (NULL);
+  /* While the odds are against us getting 0...
+   */
+  do
+    {
+      tree_store->stamp = g_random_int ();
+    }
+  while (tree_store->stamp == 0);
+
+  tree_store->sort_list = NULL;
+  tree_store->sort_column_id = GTK_TREE_SORTABLE_UNSORTED_SORT_COLUMN_ID;
+  tree_store->columns_dirty = FALSE;
+}
+
+/**
+ * gtk_tree_store_new:
+ * @n_columns: number of columns in the tree store
+ * @Varargs: all #GType types for the columns, from first to last
+ *
+ * Creates a new tree store as with @n_columns columns each of the types passed
+ * in.  Note that only types derived from standard GObject fundamental types 
+ * are supported. 
+ *
+ * As an example, <literal>gtk_tree_store_new (3, G_TYPE_INT, G_TYPE_STRING,
+ * GDK_TYPE_PIXBUF);</literal> will create a new #GtkTreeStore with three columns, of type
+ * <type>int</type>, <type>string</type> and #GdkPixbuf respectively.
+ *
+ * Return value: a new #GtkTreeStore
+ **/
+GtkTreeStore *
+gtk_tree_store_new (gint n_columns,
+			       ...)
+{
+  GtkTreeStore *retval;
+  va_list args;
+  gint i;
+
+  g_return_val_if_fail (n_columns > 0, NULL);
+
+  retval = g_object_new (GTK_TYPE_TREE_STORE, NULL);
+  gtk_tree_store_set_n_columns (retval, n_columns);
+
+  va_start (args, n_columns);
+
+  for (i = 0; i < n_columns; i++)
+    {
+      GType type = va_arg (args, GType);
+      if (! _foo_tree_data_list_check_type (type))
+	{
+	  g_warning ("%s: Invalid type %s\n", G_STRLOC, g_type_name (type));
+	  g_object_unref (retval);
+          va_end (args);
+	  return NULL;
+	}
+      gtk_tree_store_set_column_type (retval, i, type);
+    }
+  va_end (args);
+
+  return retval;
+}
+/**
+ * gtk_tree_store_newv:
+ * @n_columns: number of columns in the tree store
+ * @types: an array of #GType types for the columns, from first to last
+ *
+ * Non vararg creation function.  Used primarily by language bindings.
+ *
+ * Return value: a new #GtkTreeStore
+ **/
+GtkTreeStore *
+gtk_tree_store_newv (gint   n_columns,
+		     GType *types)
+{
+  GtkTreeStore *retval;
+  gint i;
+
+  g_return_val_if_fail (n_columns > 0, NULL);
+
+  retval = g_object_new (GTK_TYPE_TREE_STORE, NULL);
+  gtk_tree_store_set_n_columns (retval, n_columns);
+
+   for (i = 0; i < n_columns; i++)
+    {
+      if (! _foo_tree_data_list_check_type (types[i]))
+	{
+	  g_warning ("%s: Invalid type %s\n", G_STRLOC, g_type_name (types[i]));
+	  g_object_unref (retval);
+	  return NULL;
+	}
+      gtk_tree_store_set_column_type (retval, i, types[i]);
+    }
+
+  return retval;
+}
+
+
+/**
+ * gtk_tree_store_set_column_types:
+ * @tree_store: A #GtkTreeStore
+ * @n_columns: Number of columns for the tree store
+ * @types: An array of #GType types, one for each column
+ * 
+ * This function is meant primarily for #GObjects that inherit from 
+ * #GtkTreeStore, and should only be used when constructing a new 
+ * #GtkTreeStore.  It will not function after a row has been added, 
+ * or a method on the #GtkTreeModel interface is called.
+ **/
+void
+gtk_tree_store_set_column_types (GtkTreeStore *tree_store,
+				 gint          n_columns,
+				 GType        *types)
+{
+  gint i;
+
+  g_return_if_fail (GTK_IS_TREE_STORE (tree_store));
+  g_return_if_fail (tree_store->columns_dirty == 0);
+
+  gtk_tree_store_set_n_columns (tree_store, n_columns);
+   for (i = 0; i < n_columns; i++)
+    {
+      if (! _foo_tree_data_list_check_type (types[i]))
+	{
+	  g_warning ("%s: Invalid type %s\n", G_STRLOC, g_type_name (types[i]));
+	  continue;
+	}
+      gtk_tree_store_set_column_type (tree_store, i, types[i]);
+    }
+}
+
+static void
+gtk_tree_store_set_n_columns (GtkTreeStore *tree_store,
+			      gint          n_columns)
+{
+  GType *new_columns;
+
+  if (tree_store->n_columns == n_columns)
+    return;
+
+  new_columns = g_new0 (GType, n_columns);
+  if (tree_store->column_headers)
+    {
+      /* copy the old header orders over */
+      if (n_columns >= tree_store->n_columns)
+	memcpy (new_columns, tree_store->column_headers, tree_store->n_columns * sizeof (gchar *));
+      else
+	memcpy (new_columns, tree_store->column_headers, n_columns * sizeof (GType));
+
+      g_free (tree_store->column_headers);
+    }
+
+  if (tree_store->sort_list)
+    _foo_tree_data_list_header_free (tree_store->sort_list);
+
+  tree_store->sort_list = _foo_tree_data_list_header_new (n_columns, tree_store->column_headers);
+
+  tree_store->column_headers = new_columns;
+  tree_store->n_columns = n_columns;
+}
+
+/**
+ * gtk_tree_store_set_column_type:
+ * @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.
+ *
+ **/
+static void
+gtk_tree_store_set_column_type (GtkTreeStore *tree_store,
+				gint          column,
+				GType         type)
+{
+  if (!_foo_tree_data_list_check_type (type))
+    {
+      g_warning ("%s: Invalid type %s\n", G_STRLOC, g_type_name (type));
+      return;
+    }
+  tree_store->column_headers[column] = type;
+}
+
+static gboolean
+node_free (GNode *node, gpointer data)
+{
+  if (node->data)
+    _foo_tree_data_list_free (node->data, (GType*)data);
+  node->data = NULL;
+
+  return FALSE;
+}
+
+static void
+gtk_tree_store_finalize (GObject *object)
+{
+  GtkTreeStore *tree_store = GTK_TREE_STORE (object);
+
+  g_node_traverse (tree_store->root, G_POST_ORDER, G_TRAVERSE_ALL, -1,
+		   node_free, tree_store->column_headers);
+  g_node_destroy (tree_store->root);
+  _foo_tree_data_list_header_free (tree_store->sort_list);
+  g_free (tree_store->column_headers);
+
+  if (tree_store->default_sort_destroy)
+    {
+      GDestroyNotify d = tree_store->default_sort_destroy;
+
+      tree_store->default_sort_destroy = NULL;
+      d (tree_store->default_sort_data);
+      tree_store->default_sort_data = NULL;
+    }
+
+  /* must chain up */
+  G_OBJECT_CLASS (gtk_tree_store_parent_class)->finalize (object);
+}
+
+/* fulfill the GtkTreeModel requirements */
+/* NOTE: GtkTreeStore::root is a GNode, that acts as the parent node.  However,
+ * it is not visible to the tree or to the user., and the path "0" refers to the
+ * first child of GtkTreeStore::root.
+ */
+
+
+static GtkTreeModelFlags
+gtk_tree_store_get_flags (GtkTreeModel *tree_model)
+{
+  return GTK_TREE_MODEL_ITERS_PERSIST;
+}
+
+static gint
+gtk_tree_store_get_n_columns (GtkTreeModel *tree_model)
+{
+  GtkTreeStore *tree_store = (GtkTreeStore *) tree_model;
+
+  tree_store->columns_dirty = TRUE;
+
+  return tree_store->n_columns;
+}
+
+static GType
+gtk_tree_store_get_column_type (GtkTreeModel *tree_model,
+				gint          index)
+{
+  GtkTreeStore *tree_store = (GtkTreeStore *) tree_model;
+
+  g_return_val_if_fail (index < tree_store->n_columns, G_TYPE_INVALID);
+
+  tree_store->columns_dirty = TRUE;
+
+  return tree_store->column_headers[index];
+}
+
+static gboolean
+gtk_tree_store_get_iter (GtkTreeModel *tree_model,
+			 GtkTreeIter  *iter,
+			 GtkTreePath  *path)
+{
+  GtkTreeStore *tree_store = (GtkTreeStore *) tree_model;
+  GtkTreeIter parent;
+  gint *indices;
+  gint depth, i;
+
+  tree_store->columns_dirty = TRUE;
+
+  indices = gtk_tree_path_get_indices (path);
+  depth = gtk_tree_path_get_depth (path);
+
+  g_return_val_if_fail (depth > 0, FALSE);
+
+  parent.stamp = tree_store->stamp;
+  parent.user_data = tree_store->root;
+
+  if (!gtk_tree_store_iter_nth_child (tree_model, iter, &parent, indices[0]))
+    return FALSE;
+
+  for (i = 1; i < depth; i++)
+    {
+      parent = *iter;
+      if (!gtk_tree_store_iter_nth_child (tree_model, iter, &parent, indices[i]))
+	return FALSE;
+    }
+
+  return TRUE;
+}
+
+static GtkTreePath *
+gtk_tree_store_get_path (GtkTreeModel *tree_model,
+			 GtkTreeIter  *iter)
+{
+  GtkTreeStore *tree_store = (GtkTreeStore *) tree_model;
+  GtkTreePath *retval;
+  GNode *tmp_node;
+  gint i = 0;
+
+  g_return_val_if_fail (iter->user_data != NULL, NULL);
+  g_return_val_if_fail (iter->stamp == tree_store->stamp, NULL);
+
+  validate_tree (tree_store);
+
+  if (G_NODE (iter->user_data)->parent == NULL &&
+      G_NODE (iter->user_data) == tree_store->root)
+    return gtk_tree_path_new ();
+  g_assert (G_NODE (iter->user_data)->parent != NULL);
+
+  if (G_NODE (iter->user_data)->parent == G_NODE (tree_store->root))
+    {
+      retval = gtk_tree_path_new ();
+      tmp_node = G_NODE (tree_store->root)->children;
+    }
+  else
+    {
+      GtkTreeIter tmp_iter = *iter;
+
+      tmp_iter.user_data = G_NODE (iter->user_data)->parent;
+
+      retval = gtk_tree_store_get_path (tree_model, &tmp_iter);
+      tmp_node = G_NODE (iter->user_data)->parent->children;
+    }
+
+  if (retval == NULL)
+    return NULL;
+
+  if (tmp_node == NULL)
+    {
+      gtk_tree_path_free (retval);
+      return NULL;
+    }
+
+  for (; tmp_node; tmp_node = tmp_node->next)
+    {
+      if (tmp_node == G_NODE (iter->user_data))
+	break;
+      i++;
+    }
+
+  if (tmp_node == NULL)
+    {
+      /* We couldn't find node, meaning it's prolly not ours */
+      /* Perhaps I should do a g_return_if_fail here. */
+      gtk_tree_path_free (retval);
+      return NULL;
+    }
+
+  gtk_tree_path_append_index (retval, i);
+
+  return retval;
+}
+
+
+static void
+gtk_tree_store_get_value (GtkTreeModel *tree_model,
+			  GtkTreeIter  *iter,
+			  gint          column,
+			  GValue       *value)
+{
+  GtkTreeStore *tree_store = (GtkTreeStore *) tree_model;
+  FooTreeDataList *list;
+  gint tmp_column = column;
+
+  g_return_if_fail (column < tree_store->n_columns);
+  g_return_if_fail (VALID_ITER (iter, tree_store));
+
+  list = G_NODE (iter->user_data)->data;
+
+  while (tmp_column-- > 0 && list)
+    list = list->next;
+
+  if (list)
+    {
+      _foo_tree_data_list_node_to_value (list,
+					 tree_store->column_headers[column],
+					 value);
+    }
+  else
+    {
+      /* We want to return an initialized but empty (default) value */
+      g_value_init (value, tree_store->column_headers[column]);
+    }
+}
+
+static gboolean
+gtk_tree_store_iter_next (GtkTreeModel  *tree_model,
+			  GtkTreeIter   *iter)
+{
+  g_return_val_if_fail (iter->user_data != NULL, FALSE);
+  g_return_val_if_fail (iter->stamp == GTK_TREE_STORE (tree_model)->stamp, FALSE);
+
+  if (G_NODE (iter->user_data)->next)
+    {
+      iter->user_data = G_NODE (iter->user_data)->next;
+      return TRUE;
+    }
+  else
+    {
+      iter->stamp = 0;
+      return FALSE;
+    }
+}
+
+static gboolean
+gtk_tree_store_iter_children (GtkTreeModel *tree_model,
+			      GtkTreeIter  *iter,
+			      GtkTreeIter  *parent)
+{
+  GtkTreeStore *tree_store = (GtkTreeStore *) tree_model;
+  GNode *children;
+
+  if (parent)
+    g_return_val_if_fail (VALID_ITER (parent, tree_store), FALSE);
+
+  if (parent)
+    children = G_NODE (parent->user_data)->children;
+  else
+    children = G_NODE (tree_store->root)->children;
+
+  if (children)
+    {
+      iter->stamp = tree_store->stamp;
+      iter->user_data = children;
+      return TRUE;
+    }
+  else
+    {
+      iter->stamp = 0;
+      return FALSE;
+    }
+}
+
+static gboolean
+gtk_tree_store_iter_has_child (GtkTreeModel *tree_model,
+			       GtkTreeIter  *iter)
+{
+  g_return_val_if_fail (iter->user_data != NULL, FALSE);
+  g_return_val_if_fail (VALID_ITER (iter, tree_model), FALSE);
+
+  return G_NODE (iter->user_data)->children != NULL;
+}
+
+static gint
+gtk_tree_store_iter_n_children (GtkTreeModel *tree_model,
+				GtkTreeIter  *iter)
+{
+  GNode *node;
+  gint i = 0;
+
+  g_return_val_if_fail (iter == NULL || iter->user_data != NULL, 0);
+
+  if (iter == NULL)
+    node = G_NODE (GTK_TREE_STORE (tree_model)->root)->children;
+  else
+    node = G_NODE (iter->user_data)->children;
+
+  while (node)
+    {
+      i++;
+      node = node->next;
+    }
+
+  return i;
+}
+
+static gboolean
+gtk_tree_store_iter_nth_child (GtkTreeModel *tree_model,
+			       GtkTreeIter  *iter,
+			       GtkTreeIter  *parent,
+			       gint          n)
+{
+  GtkTreeStore *tree_store = (GtkTreeStore *) tree_model;
+  GNode *parent_node;
+  GNode *child;
+
+  g_return_val_if_fail (parent == NULL || parent->user_data != NULL, FALSE);
+
+  if (parent == NULL)
+    parent_node = tree_store->root;
+  else
+    parent_node = parent->user_data;
+
+  child = g_node_nth_child (parent_node, n);
+
+  if (child)
+    {
+      iter->user_data = child;
+      iter->stamp = tree_store->stamp;
+      return TRUE;
+    }
+  else
+    {
+      iter->stamp = 0;
+      return FALSE;
+    }
+}
+
+static gboolean
+gtk_tree_store_iter_parent (GtkTreeModel *tree_model,
+			    GtkTreeIter  *iter,
+			    GtkTreeIter  *child)
+{
+  GtkTreeStore *tree_store = (GtkTreeStore *) tree_model;
+  GNode *parent;
+
+  g_return_val_if_fail (iter != NULL, FALSE);
+  g_return_val_if_fail (VALID_ITER (child, tree_store), FALSE);
+
+  parent = G_NODE (child->user_data)->parent;
+
+  g_assert (parent != NULL);
+
+  if (parent != tree_store->root)
+    {
+      iter->user_data = parent;
+      iter->stamp = tree_store->stamp;
+      return TRUE;
+    }
+  else
+    {
+      iter->stamp = 0;
+      return FALSE;
+    }
+}
+
+
+/* Does not emit a signal */
+static gboolean
+gtk_tree_store_real_set_value (GtkTreeStore *tree_store,
+			       GtkTreeIter  *iter,
+			       gint          column,
+			       GValue       *value,
+			       gboolean      sort)
+{
+  FooTreeDataList *list;
+  FooTreeDataList *prev;
+  gint old_column = column;
+  GValue real_value = {0, };
+  gboolean converted = FALSE;
+  gboolean retval = FALSE;
+
+  if (! g_type_is_a (G_VALUE_TYPE (value), tree_store->column_headers[column]))
+    {
+      if (! (g_value_type_compatible (G_VALUE_TYPE (value), tree_store->column_headers[column]) &&
+	     g_value_type_compatible (tree_store->column_headers[column], G_VALUE_TYPE (value))))
+	{
+	  g_warning ("%s: Unable to convert from %s to %s\n",
+		     G_STRLOC,
+		     g_type_name (G_VALUE_TYPE (value)),
+		     g_type_name (tree_store->column_headers[column]));
+	  return retval;
+	}
+      if (!g_value_transform (value, &real_value))
+	{
+	  g_warning ("%s: Unable to make conversion from %s to %s\n",
+		     G_STRLOC,
+		     g_type_name (G_VALUE_TYPE (value)),
+		     g_type_name (tree_store->column_headers[column]));
+	  g_value_unset (&real_value);
+	  return retval;
+	}
+      converted = TRUE;
+    }
+
+  prev = list = G_NODE (iter->user_data)->data;
+
+  while (list != NULL)
+    {
+      if (column == 0)
+	{
+	  if (converted)
+	    _foo_tree_data_list_value_to_node (list, &real_value);
+	  else
+	    _foo_tree_data_list_value_to_node (list, value);
+	  retval = TRUE;
+	  if (converted)
+	    g_value_unset (&real_value);
+          if (sort && GTK_TREE_STORE_IS_SORTED (tree_store))
+            gtk_tree_store_sort_iter_changed (tree_store, iter, old_column, TRUE);
+	  return retval;
+	}
+
+      column--;
+      prev = list;
+      list = list->next;
+    }
+
+  if (G_NODE (iter->user_data)->data == NULL)
+    {
+      G_NODE (iter->user_data)->data = list = _foo_tree_data_list_alloc ();
+      list->next = NULL;
+    }
+  else
+    {
+      list = prev->next = _foo_tree_data_list_alloc ();
+      list->next = NULL;
+    }
+
+  while (column != 0)
+    {
+      list->next = _foo_tree_data_list_alloc ();
+      list = list->next;
+      list->next = NULL;
+      column --;
+    }
+
+  if (converted)
+    _foo_tree_data_list_value_to_node (list, &real_value);
+  else
+    _foo_tree_data_list_value_to_node (list, value);
+  
+  retval = TRUE;
+  if (converted)
+    g_value_unset (&real_value);
+
+  if (sort && GTK_TREE_STORE_IS_SORTED (tree_store))
+    gtk_tree_store_sort_iter_changed (tree_store, iter, old_column, TRUE);
+
+  return retval;
+}
+
+/**
+ * gtk_tree_store_set_value:
+ * @tree_store: a #GtkTreeStore
+ * @iter: A valid #GtkTreeIter for the row being modified
+ * @column: column number to modify
+ * @value: new value for the cell
+ *
+ * Sets the data in the cell specified by @iter and @column.
+ * The type of @value must be convertible to the type of the
+ * column.
+ *
+ **/
+void
+gtk_tree_store_set_value (GtkTreeStore *tree_store,
+			  GtkTreeIter  *iter,
+			  gint          column,
+			  GValue       *value)
+{
+  g_return_if_fail (GTK_IS_TREE_STORE (tree_store));
+  g_return_if_fail (VALID_ITER (iter, tree_store));
+  g_return_if_fail (column >= 0 && column < tree_store->n_columns);
+  g_return_if_fail (G_IS_VALUE (value));
+
+  if (gtk_tree_store_real_set_value (tree_store, iter, column, value, TRUE))
+    {
+      GtkTreePath *path;
+
+      path = gtk_tree_store_get_path (GTK_TREE_MODEL (tree_store), iter);
+      gtk_tree_model_row_changed (GTK_TREE_MODEL (tree_store), path, iter);
+      gtk_tree_path_free (path);
+    }
+}
+
+static GtkTreeIterCompareFunc
+gtk_tree_store_get_compare_func (GtkTreeStore *tree_store)
+{
+  GtkTreeIterCompareFunc func = NULL;
+
+  if (GTK_TREE_STORE_IS_SORTED (tree_store))
+    {
+      if (tree_store->sort_column_id != -1)
+	{
+	  GtkTreeDataSortHeader *header;
+	  header = _foo_tree_data_list_get_header (tree_store->sort_list,
+						   tree_store->sort_column_id);
+	  g_return_val_if_fail (header != NULL, NULL);
+	  g_return_val_if_fail (header->func != NULL, NULL);
+	  func = header->func;
+	}
+      else
+	{
+	  func = tree_store->default_sort_func;
+	}
+    }
+
+  return func;
+}
+
+static void
+gtk_tree_store_set_vector_internal (GtkTreeStore *tree_store,
+				    GtkTreeIter  *iter,
+				    gboolean     *emit_signal,
+				    gboolean     *maybe_need_sort,
+				    gint         *columns,
+				    GValue       *values,
+				    gint          n_values)
+{
+  gint i;
+  GtkTreeIterCompareFunc func = NULL;
+
+  func = gtk_tree_store_get_compare_func (tree_store);
+  if (func != _foo_tree_data_list_compare_func)
+    *maybe_need_sort = TRUE;
+
+  for (i = 0; i < n_values; i++)
+    {
+      *emit_signal = gtk_tree_store_real_set_value (tree_store, iter,
+						    columns[i], &values[i],
+						    FALSE) || *emit_signal;
+
+      if (func == _foo_tree_data_list_compare_func &&
+	  columns[i] == tree_store->sort_column_id)
+	*maybe_need_sort = TRUE;
+    }
+}
+
+static void
+gtk_tree_store_set_valist_internal (GtkTreeStore *tree_store,
+                                    GtkTreeIter  *iter,
+                                    gboolean     *emit_signal,
+                                    gboolean     *maybe_need_sort,
+                                    va_list       var_args)
+{
+  gint column;
+  GtkTreeIterCompareFunc func = NULL;
+
+  column = va_arg (var_args, gint);
+
+  func = gtk_tree_store_get_compare_func (tree_store);
+  if (func != _foo_tree_data_list_compare_func)
+    *maybe_need_sort = TRUE;
+
+  while (column != -1)
+    {
+      GValue value = { 0, };
+      gchar *error = NULL;
+
+      if (column < 0 || column >= tree_store->n_columns)
+	{
+	  g_warning ("%s: Invalid column number %d added to iter (remember to end your list of columns with a -1)", G_STRLOC, column);
+	  break;
+	}
+      g_value_init (&value, tree_store->column_headers[column]);
+
+      G_VALUE_COLLECT (&value, var_args, 0, &error);
+      if (error)
+	{
+	  g_warning ("%s: %s", G_STRLOC, error);
+	  g_free (error);
+
+ 	  /* we purposely leak the value here, it might not be
+	   * in a sane state if an error condition occoured
+	   */
+	  break;
+	}
+
+      *emit_signal = gtk_tree_store_real_set_value (tree_store,
+						    iter,
+						    column,
+						    &value,
+						    FALSE) || *emit_signal;
+
+      if (func == _foo_tree_data_list_compare_func &&
+	  column == tree_store->sort_column_id)
+	*maybe_need_sort = TRUE;
+
+      g_value_unset (&value);
+
+      column = va_arg (var_args, gint);
+    }
+}
+
+/**
+ * gtk_tree_store_set_valuesv:
+ * @tree_store: A #GtkTreeStore
+ * @iter: A valid #GtkTreeIter for the row being modified
+ * @columns: an array of column numbers
+ * @values: an array of GValues
+ * @n_values: the length of the @columns and @values arrays
+ *
+ * A variant of gtk_tree_store_set_valist() which takes
+ * the columns and values as two arrays, instead of varargs.  This
+ * function is mainly intended for language bindings or in case
+ * the number of columns to change is not known until run-time.
+ *
+ * Since: 2.12
+ **/
+void
+gtk_tree_store_set_valuesv (GtkTreeStore *tree_store,
+			    GtkTreeIter  *iter,
+			    gint         *columns,
+			    GValue       *values,
+			    gint          n_values)
+{
+  gboolean emit_signal = FALSE;
+  gboolean maybe_need_sort = FALSE;
+
+  g_return_if_fail (GTK_IS_TREE_STORE (tree_store));
+  g_return_if_fail (VALID_ITER (iter, tree_store));
+
+  gtk_tree_store_set_vector_internal (tree_store, iter,
+				      &emit_signal,
+				      &maybe_need_sort,
+				      columns, values, n_values);
+
+  if (maybe_need_sort && GTK_TREE_STORE_IS_SORTED (tree_store))
+    gtk_tree_store_sort_iter_changed (tree_store, iter, tree_store->sort_column_id, TRUE);
+
+  if (emit_signal)
+    {
+      GtkTreePath *path;
+
+      path = gtk_tree_store_get_path (GTK_TREE_MODEL (tree_store), iter);
+      gtk_tree_model_row_changed (GTK_TREE_MODEL (tree_store), path, iter);
+      gtk_tree_path_free (path);
+    }
+}
+
+/**
+ * gtk_tree_store_set_valist:
+ * @tree_store: A #GtkTreeStore
+ * @iter: A valid #GtkTreeIter for the row being modified
+ * @var_args: <type>va_list</type> of column/value pairs
+ *
+ * See gtk_tree_store_set(); this version takes a <type>va_list</type> for
+ * use by language bindings.
+ *
+ **/
+void
+gtk_tree_store_set_valist (GtkTreeStore *tree_store,
+                           GtkTreeIter  *iter,
+                           va_list       var_args)
+{
+  gboolean emit_signal = FALSE;
+  gboolean maybe_need_sort = FALSE;
+
+  g_return_if_fail (GTK_IS_TREE_STORE (tree_store));
+  g_return_if_fail (VALID_ITER (iter, tree_store));
+
+  gtk_tree_store_set_valist_internal (tree_store, iter,
+				      &emit_signal,
+				      &maybe_need_sort,
+				      var_args);
+
+  if (maybe_need_sort && GTK_TREE_STORE_IS_SORTED (tree_store))
+    gtk_tree_store_sort_iter_changed (tree_store, iter, tree_store->sort_column_id, TRUE);
+
+  if (emit_signal)
+    {
+      GtkTreePath *path;
+
+      path = gtk_tree_store_get_path (GTK_TREE_MODEL (tree_store), iter);
+      gtk_tree_model_row_changed (GTK_TREE_MODEL (tree_store), path, iter);
+      gtk_tree_path_free (path);
+    }
+}
+
+/**
+ * gtk_tree_store_set:
+ * @tree_store: A #GtkTreeStore
+ * @iter: A valid #GtkTreeIter for the row being modified
+ * @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. 
+ * The list is terminated by a -1. For example, to set column 0 with type
+ * %G_TYPE_STRING to "Foo", you would write 
+ * <literal>gtk_tree_store_set (store, iter, 0, "Foo", -1)</literal>.
+ * The value will be copied or referenced by the store if appropriate.
+ **/
+void
+gtk_tree_store_set (GtkTreeStore *tree_store,
+		    GtkTreeIter  *iter,
+		    ...)
+{
+  va_list var_args;
+
+  va_start (var_args, iter);
+  gtk_tree_store_set_valist (tree_store, iter, var_args);
+  va_end (var_args);
+}
+
+/**
+ * gtk_tree_store_remove:
+ * @tree_store: A #GtkTreeStore
+ * @iter: A valid #GtkTreeIter
+ * 
+ * Removes @iter from @tree_store.  After being removed, @iter is set to the
+ * next valid row at that level, or invalidated if it previously pointed to the
+ * last one.
+ *
+ * Return value: %TRUE if @iter is still valid, %FALSE if not.
+ **/
+gboolean
+gtk_tree_store_remove (GtkTreeStore *tree_store,
+		       GtkTreeIter  *iter)
+{
+  GtkTreePath *path;
+  GtkTreeIter new_iter = {0,};
+  GNode *parent;
+  GNode *next_node;
+
+  g_return_val_if_fail (GTK_IS_TREE_STORE (tree_store), FALSE);
+  g_return_val_if_fail (VALID_ITER (iter, tree_store), FALSE);
+
+  parent = G_NODE (iter->user_data)->parent;
+
+  g_assert (parent != NULL);
+  next_node = G_NODE (iter->user_data)->next;
+
+  if (G_NODE (iter->user_data)->data)
+    g_node_traverse (G_NODE (iter->user_data), G_POST_ORDER, G_TRAVERSE_ALL,
+		     -1, node_free, tree_store->column_headers);
+
+  path = gtk_tree_store_get_path (GTK_TREE_MODEL (tree_store), iter);
+  g_node_destroy (G_NODE (iter->user_data));
+
+  gtk_tree_model_row_deleted (GTK_TREE_MODEL (tree_store), path);
+
+  if (parent != G_NODE (tree_store->root))
+    {
+      /* child_toggled */
+      if (parent->children == NULL)
+	{
+	  gtk_tree_path_up (path);
+
+	  new_iter.stamp = tree_store->stamp;
+	  new_iter.user_data = parent;
+	  gtk_tree_model_row_has_child_toggled (GTK_TREE_MODEL (tree_store), path, &new_iter);
+	}
+    }
+  gtk_tree_path_free (path);
+
+  /* revalidate iter */
+  if (next_node != NULL)
+    {
+      iter->stamp = tree_store->stamp;
+      iter->user_data = next_node;
+      return TRUE;
+    }
+  else
+    {
+      iter->stamp = 0;
+      iter->user_data = NULL;
+    }
+
+  return FALSE;
+}
+
+/**
+ * gtk_tree_store_insert:
+ * @tree_store: A #GtkTreeStore
+ * @iter: An unset #GtkTreeIter to set to the new row
+ * @parent: A valid #GtkTreeIter, or %NULL
+ * @position: position to insert the new row
+ *
+ * Creates a new row at @position.  If parent is non-%NULL, then the row will be
+ * made a child of @parent.  Otherwise, the row will be created at the toplevel.
+ * If @position is larger than the number of rows at that level, then the new
+ * row will be inserted to the end of the list.  @iter will be changed to point
+ * to this new row.  The row will be empty after this function is called.  To
+ * fill in values, you need to call gtk_tree_store_set() or
+ * gtk_tree_store_set_value().
+ *
+ **/
+void
+gtk_tree_store_insert (GtkTreeStore *tree_store,
+		       GtkTreeIter  *iter,
+		       GtkTreeIter  *parent,
+		       gint          position)
+{
+  GtkTreePath *path;
+  GNode *parent_node;
+  GNode *new_node;
+
+  g_return_if_fail (GTK_IS_TREE_STORE (tree_store));
+  g_return_if_fail (iter != NULL);
+  if (parent)
+    g_return_if_fail (VALID_ITER (parent, tree_store));
+
+  if (parent)
+    parent_node = parent->user_data;
+  else
+    parent_node = tree_store->root;
+
+  tree_store->columns_dirty = TRUE;
+
+  new_node = g_node_new (NULL);
+
+  iter->stamp = tree_store->stamp;
+  iter->user_data = new_node;
+  g_node_insert (parent_node, position, new_node);
+
+  path = gtk_tree_store_get_path (GTK_TREE_MODEL (tree_store), iter);
+  gtk_tree_model_row_inserted (GTK_TREE_MODEL (tree_store), path, iter);
+
+  if (parent_node != tree_store->root)
+    {
+      if (new_node->prev == NULL && new_node->next == NULL)
+        {
+          gtk_tree_path_up (path);
+          gtk_tree_model_row_has_child_toggled (GTK_TREE_MODEL (tree_store), path, parent);
+        }
+    }
+
+  gtk_tree_path_free (path);
+
+  validate_tree ((GtkTreeStore*)tree_store);
+}
+
+/**
+ * gtk_tree_store_insert_before:
+ * @tree_store: A #GtkTreeStore
+ * @iter: An unset #GtkTreeIter to set to the new row
+ * @parent: A valid #GtkTreeIter, or %NULL
+ * @sibling: A valid #GtkTreeIter, or %NULL
+ *
+ * Inserts a new row before @sibling.  If @sibling is %NULL, then the row will
+ * be appended to @parent 's children.  If @parent and @sibling are %NULL, then
+ * the row will be appended to the toplevel.  If both @sibling and @parent are
+ * set, then @parent must be the parent of @sibling.  When @sibling is set,
+ * @parent is optional.
+ *
+ * @iter will be changed to point to this new row.  The row will be empty after
+ * this function is called.  To fill in values, you need to call
+ * gtk_tree_store_set() or gtk_tree_store_set_value().
+ *
+ **/
+void
+gtk_tree_store_insert_before (GtkTreeStore *tree_store,
+			      GtkTreeIter  *iter,
+			      GtkTreeIter  *parent,
+			      GtkTreeIter  *sibling)
+{
+  GtkTreePath *path;
+  GNode *parent_node = NULL;
+  GNode *new_node;
+
+  g_return_if_fail (GTK_IS_TREE_STORE (tree_store));
+  g_return_if_fail (iter != NULL);
+  if (parent != NULL)
+    g_return_if_fail (VALID_ITER (parent, tree_store));
+  if (sibling != NULL)
+    g_return_if_fail (VALID_ITER (sibling, tree_store));
+
+  if (parent == NULL && sibling == NULL)
+    parent_node = tree_store->root;
+  else if (parent == NULL)
+    parent_node = G_NODE (sibling->user_data)->parent;
+  else if (sibling == NULL)
+    parent_node = G_NODE (parent->user_data);
+  else
+    {
+      g_return_if_fail (G_NODE (sibling->user_data)->parent == G_NODE (parent->user_data));
+      parent_node = G_NODE (parent->user_data);
+    }
+
+  tree_store->columns_dirty = TRUE;
+
+  new_node = g_node_new (NULL);
+
+  g_node_insert_before (parent_node,
+			sibling ? G_NODE (sibling->user_data) : NULL,
+                        new_node);
+
+  iter->stamp = tree_store->stamp;
+  iter->user_data = new_node;
+
+  path = gtk_tree_store_get_path (GTK_TREE_MODEL (tree_store), iter);
+  gtk_tree_model_row_inserted (GTK_TREE_MODEL (tree_store), path, iter);
+
+  if (parent_node != tree_store->root)
+    {
+      if (new_node->prev == NULL && new_node->next == NULL)
+        {
+          GtkTreeIter parent_iter;
+
+          parent_iter.stamp = tree_store->stamp;
+          parent_iter.user_data = parent_node;
+
+          gtk_tree_path_up (path);
+          gtk_tree_model_row_has_child_toggled (GTK_TREE_MODEL (tree_store), path, &parent_iter);
+        }
+    }
+
+  gtk_tree_path_free (path);
+
+  validate_tree (tree_store);
+}
+
+/**
+ * gtk_tree_store_insert_after:
+ * @tree_store: A #GtkTreeStore
+ * @iter: An unset #GtkTreeIter to set to the new row
+ * @parent: A valid #GtkTreeIter, or %NULL
+ * @sibling: A valid #GtkTreeIter, or %NULL
+ *
+ * Inserts a new row after @sibling.  If @sibling is %NULL, then the row will be
+ * prepended to @parent 's children.  If @parent and @sibling are %NULL, then
+ * the row will be prepended to the toplevel.  If both @sibling and @parent are
+ * set, then @parent must be the parent of @sibling.  When @sibling is set,
+ * @parent is optional.
+ *
+ * @iter will be changed to point to this new row.  The row will be empty after
+ * this function is called.  To fill in values, you need to call
+ * gtk_tree_store_set() or gtk_tree_store_set_value().
+ *
+ **/
+void
+gtk_tree_store_insert_after (GtkTreeStore *tree_store,
+			     GtkTreeIter  *iter,
+			     GtkTreeIter  *parent,
+			     GtkTreeIter  *sibling)
+{
+  GtkTreePath *path;
+  GNode *parent_node;
+  GNode *new_node;
+
+  g_return_if_fail (GTK_IS_TREE_STORE (tree_store));
+  g_return_if_fail (iter != NULL);
+  if (parent != NULL)
+    g_return_if_fail (VALID_ITER (parent, tree_store));
+  if (sibling != NULL)
+    g_return_if_fail (VALID_ITER (sibling, tree_store));
+
+  if (parent == NULL && sibling == NULL)
+    parent_node = tree_store->root;
+  else if (parent == NULL)
+    parent_node = G_NODE (sibling->user_data)->parent;
+  else if (sibling == NULL)
+    parent_node = G_NODE (parent->user_data);
+  else
+    {
+      g_return_if_fail (G_NODE (sibling->user_data)->parent ==
+                        G_NODE (parent->user_data));
+      parent_node = G_NODE (parent->user_data);
+    }
+
+  tree_store->columns_dirty = TRUE;
+
+  new_node = g_node_new (NULL);
+
+  g_node_insert_after (parent_node,
+		       sibling ? G_NODE (sibling->user_data) : NULL,
+                       new_node);
+
+  iter->stamp = tree_store->stamp;
+  iter->user_data = new_node;
+
+  path = gtk_tree_store_get_path (GTK_TREE_MODEL (tree_store), iter);
+  gtk_tree_model_row_inserted (GTK_TREE_MODEL (tree_store), path, iter);
+
+  if (parent_node != tree_store->root)
+    {
+      if (new_node->prev == NULL && new_node->next == NULL)
+        {
+          GtkTreeIter parent_iter;
+
+          parent_iter.stamp = tree_store->stamp;
+          parent_iter.user_data = parent_node;
+
+          gtk_tree_path_up (path);
+          gtk_tree_model_row_has_child_toggled (GTK_TREE_MODEL (tree_store), path, &parent_iter);
+        }
+    }
+
+  gtk_tree_path_free (path);
+
+  validate_tree (tree_store);
+}
+
+/**
+ * gtk_tree_store_insert_with_values:
+ * @tree_store: A #GtkTreeStore
+ * @iter: An unset #GtkTreeIter to set the new row, or %NULL.
+ * @parent: A valid #GtkTreeIter, or %NULL
+ * @position: position to insert the new row
+ * @Varargs: pairs of column number and value, terminated with -1
+ *
+ * Creates a new row at @position.  @iter will be changed to point to this
+ * new row.  If @position is larger than the number of rows on the list, then
+ * the new row will be appended to the list.  The row will be filled with
+ * the values given to this function.
+ *
+ * Calling
+ * <literal>gtk_tree_store_insert_with_values (tree_store, iter, position, ...)</literal>
+ * has the same effect as calling
+ * |[
+ * gtk_tree_store_insert (tree_store, iter, position);
+ * gtk_tree_store_set (tree_store, iter, ...);
+ * ]|
+ * with the different that the former will only emit a row_inserted signal,
+ * while the latter will emit row_inserted, row_changed and if the tree store
+ * is sorted, rows_reordered.  Since emitting the rows_reordered signal
+ * repeatedly can affect the performance of the program,
+ * gtk_tree_store_insert_with_values() should generally be preferred when
+ * inserting rows in a sorted tree store.
+ *
+ * Since: 2.10
+ */
+void
+gtk_tree_store_insert_with_values (GtkTreeStore *tree_store,
+				   GtkTreeIter  *iter,
+				   GtkTreeIter  *parent,
+				   gint          position,
+				   ...)
+{
+  GtkTreePath *path;
+  GNode *parent_node;
+  GNode *new_node;
+  GtkTreeIter tmp_iter;
+  va_list var_args;
+  gboolean changed = FALSE;
+  gboolean maybe_need_sort = FALSE;
+
+  g_return_if_fail (GTK_IS_TREE_STORE (tree_store));
+
+  if (!iter)
+    iter = &tmp_iter;
+
+  if (parent)
+    g_return_if_fail (VALID_ITER (parent, tree_store));
+
+  if (parent)
+    parent_node = parent->user_data;
+  else
+    parent_node = tree_store->root;
+
+  tree_store->columns_dirty = TRUE;
+
+  new_node = g_node_new (NULL);
+
+  iter->stamp = tree_store->stamp;
+  iter->user_data = new_node;
+  g_node_insert (parent_node, position, new_node);
+
+  va_start (var_args, position);
+  gtk_tree_store_set_valist_internal (tree_store, iter,
+				      &changed, &maybe_need_sort,
+				      var_args);
+  va_end (var_args);
+
+  if (maybe_need_sort && GTK_TREE_STORE_IS_SORTED (tree_store))
+    gtk_tree_store_sort_iter_changed (tree_store, iter, tree_store->sort_column_id, FALSE);
+
+  path = gtk_tree_store_get_path (GTK_TREE_MODEL (tree_store), iter);
+  gtk_tree_model_row_inserted (GTK_TREE_MODEL (tree_store), path, iter);
+
+  if (parent_node != tree_store->root)
+    {
+      if (new_node->prev == NULL && new_node->next == NULL)
+        {
+	  gtk_tree_path_up (path);
+	  gtk_tree_model_row_has_child_toggled (GTK_TREE_MODEL (tree_store), path, parent);
+	}
+    }
+
+  gtk_tree_path_free (path);
+
+  validate_tree ((GtkTreeStore *)tree_store);
+}
+
+/**
+ * gtk_tree_store_insert_with_valuesv:
+ * @tree_store: A #GtkTreeStore
+ * @iter: An unset #GtkTreeIter to set the new row, or %NULL.
+ * @parent: A valid #GtkTreeIter, or %NULL
+ * @position: position to insert the new row
+ * @columns: an array of column numbers
+ * @values: an array of GValues
+ * @n_values: the length of the @columns and @values arrays
+ *
+ * A variant of gtk_tree_store_insert_with_values() which takes
+ * the columns and values as two arrays, instead of varargs.  This
+ * function is mainly intended for language bindings.
+ *
+ * Since: 2.10
+ */
+void
+gtk_tree_store_insert_with_valuesv (GtkTreeStore *tree_store,
+				    GtkTreeIter  *iter,
+				    GtkTreeIter  *parent,
+				    gint          position,
+				    gint         *columns,
+				    GValue       *values,
+				    gint          n_values)
+{
+  GtkTreePath *path;
+  GNode *parent_node;
+  GNode *new_node;
+  GtkTreeIter tmp_iter;
+  gboolean changed = FALSE;
+  gboolean maybe_need_sort = FALSE;
+
+  g_return_if_fail (GTK_IS_TREE_STORE (tree_store));
+
+  if (!iter)
+    iter = &tmp_iter;
+
+  if (parent)
+    g_return_if_fail (VALID_ITER (parent, tree_store));
+
+  if (parent)
+    parent_node = parent->user_data;
+  else
+    parent_node = tree_store->root;
+
+  tree_store->columns_dirty = TRUE;
+
+  new_node = g_node_new (NULL);
+
+  iter->stamp = tree_store->stamp;
+  iter->user_data = new_node;
+  g_node_insert (parent_node, position, new_node);
+
+  gtk_tree_store_set_vector_internal (tree_store, iter,
+				      &changed, &maybe_need_sort,
+				      columns, values, n_values);
+
+  if (maybe_need_sort && GTK_TREE_STORE_IS_SORTED (tree_store))
+    gtk_tree_store_sort_iter_changed (tree_store, iter, tree_store->sort_column_id, FALSE);
+
+  path = gtk_tree_store_get_path (GTK_TREE_MODEL (tree_store), iter);
+  gtk_tree_model_row_inserted (GTK_TREE_MODEL (tree_store), path, iter);
+
+  if (parent_node != tree_store->root)
+    {
+      if (new_node->prev == NULL && new_node->next == NULL)
+        {
+	  gtk_tree_path_up (path);
+	  gtk_tree_model_row_has_child_toggled (GTK_TREE_MODEL (tree_store), path, parent);
+	}
+    }
+
+  gtk_tree_path_free (path);
+
+  validate_tree ((GtkTreeStore *)tree_store);
+}
+
+/**
+ * gtk_tree_store_prepend:
+ * @tree_store: A #GtkTreeStore
+ * @iter: An unset #GtkTreeIter to set to the prepended row
+ * @parent: A valid #GtkTreeIter, or %NULL
+ * 
+ * Prepends a new row to @tree_store.  If @parent is non-%NULL, then it will prepend
+ * the new row before the first child of @parent, otherwise it will prepend a row
+ * to the top level.  @iter will be changed to point to this new row.  The row
+ * will be empty after this function is called.  To fill in values, you need to
+ * call gtk_tree_store_set() or gtk_tree_store_set_value().
+ **/
+void
+gtk_tree_store_prepend (GtkTreeStore *tree_store,
+			GtkTreeIter  *iter,
+			GtkTreeIter  *parent)
+{
+  GNode *parent_node;
+
+  g_return_if_fail (GTK_IS_TREE_STORE (tree_store));
+  g_return_if_fail (iter != NULL);
+  if (parent != NULL)
+    g_return_if_fail (VALID_ITER (parent, tree_store));
+
+  tree_store->columns_dirty = TRUE;
+
+  if (parent == NULL)
+    parent_node = tree_store->root;
+  else
+    parent_node = parent->user_data;
+
+  if (parent_node->children == NULL)
+    {
+      GtkTreePath *path;
+      
+      iter->stamp = tree_store->stamp;
+      iter->user_data = g_node_new (NULL);
+
+      g_node_prepend (parent_node, G_NODE (iter->user_data));
+
+      path = gtk_tree_store_get_path (GTK_TREE_MODEL (tree_store), iter);
+      gtk_tree_model_row_inserted (GTK_TREE_MODEL (tree_store), path, iter);
+
+      if (parent_node != tree_store->root)
+	{
+	  gtk_tree_path_up (path);
+	  gtk_tree_model_row_has_child_toggled (GTK_TREE_MODEL (tree_store), path, parent);
+	}
+      gtk_tree_path_free (path);
+    }
+  else
+    {
+      gtk_tree_store_insert_after (tree_store, iter, parent, NULL);
+    }
+
+  validate_tree (tree_store);
+}
+
+/**
+ * gtk_tree_store_append:
+ * @tree_store: A #GtkTreeStore
+ * @iter: An unset #GtkTreeIter to set to the appended row
+ * @parent: A valid #GtkTreeIter, or %NULL
+ * 
+ * Appends a new row to @tree_store.  If @parent is non-%NULL, then it will append the
+ * new row after the last child of @parent, otherwise it will append a row to
+ * the top level.  @iter will be changed to point to this new row.  The row will
+ * be empty after this function is called.  To fill in values, you need to call
+ * gtk_tree_store_set() or gtk_tree_store_set_value().
+ **/
+void
+gtk_tree_store_append (GtkTreeStore *tree_store,
+		       GtkTreeIter  *iter,
+		       GtkTreeIter  *parent)
+{
+  GNode *parent_node;
+
+  g_return_if_fail (GTK_IS_TREE_STORE (tree_store));
+  g_return_if_fail (iter != NULL);
+  if (parent != NULL)
+    g_return_if_fail (VALID_ITER (parent, tree_store));
+
+  if (parent == NULL)
+    parent_node = tree_store->root;
+  else
+    parent_node = parent->user_data;
+
+  tree_store->columns_dirty = TRUE;
+
+  if (parent_node->children == NULL)
+    {
+      GtkTreePath *path;
+
+      iter->stamp = tree_store->stamp;
+      iter->user_data = g_node_new (NULL);
+
+      g_node_append (parent_node, G_NODE (iter->user_data));
+
+      path = gtk_tree_store_get_path (GTK_TREE_MODEL (tree_store), iter);
+      gtk_tree_model_row_inserted (GTK_TREE_MODEL (tree_store), path, iter);
+
+      if (parent_node != tree_store->root)
+	{
+	  gtk_tree_path_up (path);
+	  gtk_tree_model_row_has_child_toggled (GTK_TREE_MODEL (tree_store), path, parent);
+	}
+      gtk_tree_path_free (path);
+    }
+  else
+    {
+      gtk_tree_store_insert_before (tree_store, iter, parent, NULL);
+    }
+
+  validate_tree (tree_store);
+}
+
+/**
+ * gtk_tree_store_is_ancestor:
+ * @tree_store: A #GtkTreeStore
+ * @iter: A valid #GtkTreeIter
+ * @descendant: A valid #GtkTreeIter
+ * 
+ * Returns %TRUE if @iter is an ancestor of @descendant.  That is, @iter is the
+ * parent (or grandparent or great-grandparent) of @descendant.
+ * 
+ * Return value: %TRUE, if @iter is an ancestor of @descendant
+ **/
+gboolean
+gtk_tree_store_is_ancestor (GtkTreeStore *tree_store,
+			    GtkTreeIter  *iter,
+			    GtkTreeIter  *descendant)
+{
+  g_return_val_if_fail (GTK_IS_TREE_STORE (tree_store), FALSE);
+  g_return_val_if_fail (VALID_ITER (iter, tree_store), FALSE);
+  g_return_val_if_fail (VALID_ITER (descendant, tree_store), FALSE);
+
+  return g_node_is_ancestor (G_NODE (iter->user_data),
+			     G_NODE (descendant->user_data));
+}
+
+
+/**
+ * gtk_tree_store_iter_depth:
+ * @tree_store: A #GtkTreeStore
+ * @iter: A valid #GtkTreeIter
+ * 
+ * Returns the depth of @iter.  This will be 0 for anything on the root level, 1
+ * for anything down a level, etc.
+ * 
+ * Return value: The depth of @iter
+ **/
+gint
+gtk_tree_store_iter_depth (GtkTreeStore *tree_store,
+			   GtkTreeIter  *iter)
+{
+  g_return_val_if_fail (GTK_IS_TREE_STORE (tree_store), 0);
+  g_return_val_if_fail (VALID_ITER (iter, tree_store), 0);
+
+  return g_node_depth (G_NODE (iter->user_data)) - 2;
+}
+
+/* simple ripoff from g_node_traverse_post_order */
+static gboolean
+gtk_tree_store_clear_traverse (GNode        *node,
+			       GtkTreeStore *store)
+{
+  GtkTreeIter iter;
+
+  if (node->children)
+    {
+      GNode *child;
+
+      child = node->children;
+      while (child)
+        {
+	  register GNode *current;
+
+	  current = child;
+	  child = current->next;
+	  if (gtk_tree_store_clear_traverse (current, store))
+	    return TRUE;
+	}
+
+      if (node->parent)
+        {
+	  iter.stamp = store->stamp;
+	  iter.user_data = node;
+
+	  gtk_tree_store_remove (store, &iter);
+	}
+    }
+  else if (node->parent)
+    {
+      iter.stamp = store->stamp;
+      iter.user_data = node;
+
+      gtk_tree_store_remove (store, &iter);
+    }
+
+  return FALSE;
+}
+
+static void
+gtk_tree_store_increment_stamp (GtkTreeStore *tree_store)
+{
+  do
+    {
+      tree_store->stamp++;
+    }
+  while (tree_store->stamp == 0);
+}
+
+/**
+ * gtk_tree_store_clear:
+ * @tree_store: a #GtkTreeStore
+ * 
+ * Removes all rows from @tree_store
+ **/
+void
+gtk_tree_store_clear (GtkTreeStore *tree_store)
+{
+  g_return_if_fail (GTK_IS_TREE_STORE (tree_store));
+
+  gtk_tree_store_clear_traverse (tree_store->root, tree_store);
+  gtk_tree_store_increment_stamp (tree_store);
+}
+
+static gboolean
+gtk_tree_store_iter_is_valid_helper (GtkTreeIter *iter,
+				     GNode       *first)
+{
+  GNode *node;
+
+  node = first;
+
+  do
+    {
+      if (node == iter->user_data)
+	return TRUE;
+
+      if (node->children)
+	if (gtk_tree_store_iter_is_valid_helper (iter, node->children))
+	  return TRUE;
+
+      node = node->next;
+    }
+  while (node);
+
+  return FALSE;
+}
+
+/**
+ * gtk_tree_store_iter_is_valid:
+ * @tree_store: A #GtkTreeStore.
+ * @iter: A #GtkTreeIter.
+ *
+ * WARNING: This function is slow. Only use it for debugging and/or testing
+ * purposes.
+ *
+ * Checks if the given iter is a valid iter for this #GtkTreeStore.
+ *
+ * Return value: %TRUE if the iter is valid, %FALSE if the iter is invalid.
+ *
+ * Since: 2.2
+ **/
+gboolean
+gtk_tree_store_iter_is_valid (GtkTreeStore *tree_store,
+                              GtkTreeIter  *iter)
+{
+  g_return_val_if_fail (GTK_IS_TREE_STORE (tree_store), FALSE);
+  g_return_val_if_fail (iter != NULL, FALSE);
+
+  if (!VALID_ITER (iter, tree_store))
+    return FALSE;
+
+  return gtk_tree_store_iter_is_valid_helper (iter, tree_store->root);
+}
+
+/* DND */
+
+
+static gboolean real_gtk_tree_store_row_draggable (GtkTreeDragSource *drag_source,
+                                                   GtkTreePath       *path)
+{
+  return TRUE;
+}
+               
+static gboolean
+gtk_tree_store_drag_data_delete (GtkTreeDragSource *drag_source,
+                                 GtkTreePath       *path)
+{
+  GtkTreeIter iter;
+
+  if (gtk_tree_store_get_iter (GTK_TREE_MODEL (drag_source),
+                               &iter,
+                               path))
+    {
+      gtk_tree_store_remove (GTK_TREE_STORE (drag_source),
+                             &iter);
+      return TRUE;
+    }
+  else
+    {
+      return FALSE;
+    }
+}
+
+static gboolean
+gtk_tree_store_drag_data_get (GtkTreeDragSource *drag_source,
+                              GtkTreePath       *path,
+                              GtkSelectionData  *selection_data)
+{
+  /* Note that we don't need to handle the GTK_TREE_MODEL_ROW
+   * target, because the default handler does it for us, but
+   * we do anyway for the convenience of someone maybe overriding the
+   * default handler.
+   */
+
+  if (gtk_tree_set_row_drag_data (selection_data,
+				  GTK_TREE_MODEL (drag_source),
+				  path))
+    {
+      return TRUE;
+    }
+  else
+    {
+      /* FIXME handle text targets at least. */
+    }
+
+  return FALSE;
+}
+
+static void
+copy_node_data (GtkTreeStore *tree_store,
+                GtkTreeIter  *src_iter,
+                GtkTreeIter  *dest_iter)
+{
+  FooTreeDataList *dl = G_NODE (src_iter->user_data)->data;
+  FooTreeDataList *copy_head = NULL;
+  FooTreeDataList *copy_prev = NULL;
+  FooTreeDataList *copy_iter = NULL;
+  GtkTreePath *path;
+  gint col;
+
+  col = 0;
+  while (dl)
+    {
+      copy_iter = _foo_tree_data_list_node_copy (dl, tree_store->column_headers[col]);
+
+      if (copy_head == NULL)
+        copy_head = copy_iter;
+
+      if (copy_prev)
+        copy_prev->next = copy_iter;
+
+      copy_prev = copy_iter;
+
+      dl = dl->next;
+      ++col;
+    }
+
+  G_NODE (dest_iter->user_data)->data = copy_head;
+
+  path = gtk_tree_store_get_path (GTK_TREE_MODEL (tree_store), dest_iter);
+  gtk_tree_model_row_changed (GTK_TREE_MODEL (tree_store), path, dest_iter);
+  gtk_tree_path_free (path);
+}
+
+static void
+recursive_node_copy (GtkTreeStore *tree_store,
+                     GtkTreeIter  *src_iter,
+                     GtkTreeIter  *dest_iter)
+{
+  GtkTreeIter child;
+  GtkTreeModel *model;
+
+  model = GTK_TREE_MODEL (tree_store);
+
+  copy_node_data (tree_store, src_iter, dest_iter);
+
+  if (gtk_tree_store_iter_children (model,
+                                    &child,
+                                    src_iter))
+    {
+      /* Need to create children and recurse. Note our
+       * dependence on persistent iterators here.
+       */
+      do
+        {
+          GtkTreeIter copy;
+
+          /* Gee, a really slow algorithm... ;-) FIXME */
+          gtk_tree_store_append (tree_store,
+                                 &copy,
+                                 dest_iter);
+
+          recursive_node_copy (tree_store, &child, &copy);
+        }
+      while (gtk_tree_store_iter_next (model, &child));
+    }
+}
+
+static gboolean
+gtk_tree_store_drag_data_received (GtkTreeDragDest   *drag_dest,
+                                   GtkTreePath       *dest,
+                                   GtkSelectionData  *selection_data)
+{
+  GtkTreeModel *tree_model;
+  GtkTreeStore *tree_store;
+  GtkTreeModel *src_model = NULL;
+  GtkTreePath *src_path = NULL;
+  gboolean retval = FALSE;
+
+  tree_model = GTK_TREE_MODEL (drag_dest);
+  tree_store = GTK_TREE_STORE (drag_dest);
+
+  validate_tree (tree_store);
+
+  if (gtk_tree_get_row_drag_data (selection_data,
+				  &src_model,
+				  &src_path) &&
+      src_model == tree_model)
+    {
+      /* Copy the given row to a new position */
+      GtkTreeIter src_iter;
+      GtkTreeIter dest_iter;
+      GtkTreePath *prev;
+
+      if (!gtk_tree_store_get_iter (src_model,
+                                    &src_iter,
+                                    src_path))
+        {
+          goto out;
+        }
+
+      /* 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);
+          if (gtk_tree_path_up (parent) &&
+	      gtk_tree_path_get_depth (parent) > 0)
+            {
+              gtk_tree_store_get_iter (tree_model,
+                                       &dest_parent,
+                                       parent);
+              dest_parent_p = &dest_parent;
+            }
+          gtk_tree_path_free (parent);
+          parent = NULL;
+
+          gtk_tree_store_prepend (tree_store,
+                                  &dest_iter,
+                                  dest_parent_p);
+
+          retval = TRUE;
+        }
+      else
+        {
+          if (gtk_tree_store_get_iter (tree_model, &dest_iter, prev))
+            {
+              GtkTreeIter tmp_iter = dest_iter;
+
+              gtk_tree_store_insert_after (tree_store, &dest_iter, NULL,
+                                           &tmp_iter);
+
+              retval = TRUE;
+            }
+        }
+
+      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,
+                               &src_iter,
+                               &dest_iter);
+        }
+    }
+  else
+    {
+      /* FIXME maybe add some data targets eventually, or handle text
+       * targets in the simple case.
+       */
+
+    }
+
+ out:
+
+  if (src_path)
+    gtk_tree_path_free (src_path);
+
+  return retval;
+}
+
+static gboolean
+gtk_tree_store_row_drop_possible (GtkTreeDragDest  *drag_dest,
+                                  GtkTreePath      *dest_path,
+				  GtkSelectionData *selection_data)
+{
+  GtkTreeModel *src_model = NULL;
+  GtkTreePath *src_path = NULL;
+  GtkTreePath *tmp = NULL;
+  gboolean retval = FALSE;
+  
+  /* don't accept drops if the tree has been sorted */
+  if (GTK_TREE_STORE_IS_SORTED (drag_dest))
+    return FALSE;
+
+  if (!gtk_tree_get_row_drag_data (selection_data,
+				   &src_model,
+				   &src_path))
+    goto out;
+    
+  /* can only drag to ourselves */
+  if (src_model != GTK_TREE_MODEL (drag_dest))
+    goto out;
+
+  /* Can't drop into ourself. */
+  if (gtk_tree_path_is_ancestor (src_path,
+                                 dest_path))
+    goto out;
+
+  /* Can't drop if dest_path's parent doesn't exist */
+  {
+    GtkTreeIter iter;
+
+    if (gtk_tree_path_get_depth (dest_path) > 1)
+      {
+	tmp = gtk_tree_path_copy (dest_path);
+	gtk_tree_path_up (tmp);
+	
+	if (!gtk_tree_store_get_iter (GTK_TREE_MODEL (drag_dest),
+				      &iter, tmp))
+	  goto out;
+      }
+  }
+  
+  /* Can otherwise drop anywhere. */
+  retval = TRUE;
+
+ out:
+
+  if (src_path)
+    gtk_tree_path_free (src_path);
+  if (tmp)
+    gtk_tree_path_free (tmp);
+
+  return retval;
+}
+
+/* Sorting and reordering */
+typedef struct _SortTuple
+{
+  gint offset;
+  GNode *node;
+} SortTuple;
+
+/* Reordering */
+static gint
+gtk_tree_store_reorder_func (gconstpointer a,
+			     gconstpointer b,
+			     gpointer      user_data)
+{
+  SortTuple *a_reorder;
+  SortTuple *b_reorder;
+
+  a_reorder = (SortTuple *)a;
+  b_reorder = (SortTuple *)b;
+
+  if (a_reorder->offset < b_reorder->offset)
+    return -1;
+  if (a_reorder->offset > b_reorder->offset)
+    return 1;
+
+  return 0;
+}
+
+/**
+ * gtk_tree_store_reorder:
+ * @tree_store: A #GtkTreeStore.
+ * @parent: A #GtkTreeIter.
+ * @new_order: an array of integers mapping the new position of each child
+ *      to its old position before the re-ordering,
+ *      i.e. @new_order<literal>[newpos] = oldpos</literal>.
+ *
+ * Reorders the children of @parent in @tree_store to follow the order
+ * indicated by @new_order. Note that this function only works with
+ * unsorted stores.
+ *
+ * Since: 2.2
+ **/
+void
+gtk_tree_store_reorder (GtkTreeStore *tree_store,
+			GtkTreeIter  *parent,
+			gint         *new_order)
+{
+  gint i, length = 0;
+  GNode *level, *node;
+  GtkTreePath *path;
+  SortTuple *sort_array;
+
+  g_return_if_fail (GTK_IS_TREE_STORE (tree_store));
+  g_return_if_fail (!GTK_TREE_STORE_IS_SORTED (tree_store));
+  g_return_if_fail (parent == NULL || VALID_ITER (parent, tree_store));
+  g_return_if_fail (new_order != NULL);
+
+  if (!parent)
+    level = G_NODE (tree_store->root)->children;
+  else
+    level = G_NODE (parent->user_data)->children;
+
+  /* count nodes */
+  node = level;
+  while (node)
+    {
+      length++;
+      node = node->next;
+    }
+
+  /* set up sortarray */
+  sort_array = g_new (SortTuple, length);
+
+  node = level;
+  for (i = 0; i < length; i++)
+    {
+      sort_array[new_order[i]].offset = i;
+      sort_array[i].node = node;
+
+      node = node->next;
+    }
+
+  g_qsort_with_data (sort_array,
+		     length,
+		     sizeof (SortTuple),
+		     gtk_tree_store_reorder_func,
+		     NULL);
+
+  /* fix up level */
+  for (i = 0; i < length - 1; i++)
+    {
+      sort_array[i].node->next = sort_array[i+1].node;
+      sort_array[i+1].node->prev = sort_array[i].node;
+    }
+
+  sort_array[length-1].node->next = NULL;
+  sort_array[0].node->prev = NULL;
+  if (parent)
+    G_NODE (parent->user_data)->children = sort_array[0].node;
+  else
+    G_NODE (tree_store->root)->children = sort_array[0].node;
+
+  /* emit signal */
+  if (parent)
+    path = gtk_tree_store_get_path (GTK_TREE_MODEL (tree_store), parent);
+  else
+    path = gtk_tree_path_new ();
+  gtk_tree_model_rows_reordered (GTK_TREE_MODEL (tree_store), path,
+				 parent, new_order);
+  gtk_tree_path_free (path);
+  g_free (sort_array);
+}
+
+/**
+ * gtk_tree_store_swap:
+ * @tree_store: A #GtkTreeStore.
+ * @a: A #GtkTreeIter.
+ * @b: Another #GtkTreeIter.
+ *
+ * Swaps @a and @b in the same level of @tree_store. Note that this function
+ * only works with unsorted stores.
+ *
+ * Since: 2.2
+ **/
+void
+gtk_tree_store_swap (GtkTreeStore *tree_store,
+		     GtkTreeIter  *a,
+		     GtkTreeIter  *b)
+{
+  GNode *tmp, *node_a, *node_b, *parent_node;
+  GNode *a_prev, *a_next, *b_prev, *b_next;
+  gint i, a_count, b_count, length, *order;
+  GtkTreePath *path_a, *path_b;
+  GtkTreeIter parent;
+
+  g_return_if_fail (GTK_IS_TREE_STORE (tree_store));
+  g_return_if_fail (VALID_ITER (a, tree_store));
+  g_return_if_fail (VALID_ITER (b, tree_store));
+
+  node_a = G_NODE (a->user_data);
+  node_b = G_NODE (b->user_data);
+
+  /* basic sanity checking */
+  if (node_a == node_b)
+    return;
+
+  path_a = gtk_tree_store_get_path (GTK_TREE_MODEL (tree_store), a);
+  path_b = gtk_tree_store_get_path (GTK_TREE_MODEL (tree_store), b);
+
+  g_return_if_fail (path_a && path_b);
+
+  gtk_tree_path_up (path_a);
+  gtk_tree_path_up (path_b);
+
+  if (gtk_tree_path_get_depth (path_a) == 0
+      || gtk_tree_path_get_depth (path_b) == 0)
+    {
+      if (gtk_tree_path_get_depth (path_a) != gtk_tree_path_get_depth (path_b))
+        {
+          gtk_tree_path_free (path_a);
+          gtk_tree_path_free (path_b);
+                                                                                
+          g_warning ("Given children are not in the same level\n");
+          return;
+        }
+      parent_node = G_NODE (tree_store->root);
+    }
+  else
+    {
+      if (gtk_tree_path_compare (path_a, path_b))
+        {
+          gtk_tree_path_free (path_a);
+          gtk_tree_path_free (path_b);
+                                                                                
+          g_warning ("Given children don't have a common parent\n");
+          return;
+        }
+      gtk_tree_store_get_iter (GTK_TREE_MODEL (tree_store), &parent,
+                               path_a);
+      parent_node = G_NODE (parent.user_data);
+    }
+  gtk_tree_path_free (path_b);
+
+  /* old links which we have to keep around */
+  a_prev = node_a->prev;
+  a_next = node_a->next;
+
+  b_prev = node_b->prev;
+  b_next = node_b->next;
+
+  /* fix up links if the nodes are next to eachother */
+  if (a_prev == node_b)
+    a_prev = node_a;
+  if (a_next == node_b)
+    a_next = node_a;
+
+  if (b_prev == node_a)
+    b_prev = node_b;
+  if (b_next == node_a)
+    b_next = node_b;
+
+  /* counting nodes */
+  tmp = parent_node->children;
+  i = a_count = b_count = 0;
+  while (tmp)
+    {
+      if (tmp == node_a)
+	a_count = i;
+      if (tmp == node_b)
+	b_count = i;
+
+      tmp = tmp->next;
+      i++;
+    }
+  length = i;
+
+  /* hacking the tree */
+  if (!a_prev)
+    parent_node->children = node_b;
+  else
+    a_prev->next = node_b;
+
+  if (a_next)
+    a_next->prev = node_b;
+
+  if (!b_prev)
+    parent_node->children = node_a;
+  else
+    b_prev->next = node_a;
+
+  if (b_next)
+    b_next->prev = node_a;
+
+  node_a->prev = b_prev;
+  node_a->next = b_next;
+
+  node_b->prev = a_prev;
+  node_b->next = a_next;
+
+  /* emit signal */
+  order = g_new (gint, length);
+  for (i = 0; i < length; i++)
+    if (i == a_count)
+      order[i] = b_count;
+    else if (i == b_count)
+      order[i] = a_count;
+    else
+      order[i] = i;
+
+  gtk_tree_model_rows_reordered (GTK_TREE_MODEL (tree_store), path_a,
+				 parent_node == tree_store->root 
+				 ? NULL : &parent, order);
+  gtk_tree_path_free (path_a);
+  g_free (order);
+}
+
+/* WARNING: this function is *incredibly* fragile. Please smashtest after
+ * making changes here.
+ *	-Kris
+ */
+static void
+gtk_tree_store_move (GtkTreeStore *tree_store,
+                     GtkTreeIter  *iter,
+		     GtkTreeIter  *position,
+		     gboolean      before)
+{
+  GNode *parent, *node, *a, *b, *tmp, *tmp_a, *tmp_b;
+  gint old_pos, new_pos, length, i, *order;
+  GtkTreePath *path = NULL, *tmppath, *pos_path = NULL;
+  GtkTreeIter parent_iter, dst_a, dst_b;
+  gint depth = 0;
+  gboolean handle_b = TRUE;
+
+  g_return_if_fail (GTK_IS_TREE_STORE (tree_store));
+  g_return_if_fail (!GTK_TREE_STORE_IS_SORTED (tree_store));
+  g_return_if_fail (VALID_ITER (iter, tree_store));
+  if (position)
+    g_return_if_fail (VALID_ITER (position, tree_store));
+
+  a = b = NULL;
+
+  /* sanity checks */
+  if (position)
+    {
+      path = gtk_tree_store_get_path (GTK_TREE_MODEL (tree_store), iter);
+      pos_path = gtk_tree_store_get_path (GTK_TREE_MODEL (tree_store),
+	                                  position);
+
+      /* if before:
+       *   moving the iter before path or "path + 1" doesn't make sense
+       * else
+       *   moving the iter before path or "path - 1" doesn't make sense
+       */
+      if (!gtk_tree_path_compare (path, pos_path))
+	goto free_paths_and_out;
+
+      if (before)
+        gtk_tree_path_next (path);
+      else
+        gtk_tree_path_prev (path);
+
+      if (!gtk_tree_path_compare (path, pos_path))
+	goto free_paths_and_out;
+
+      if (before)
+        gtk_tree_path_prev (path);
+      else
+        gtk_tree_path_next (path);
+
+      if (gtk_tree_path_get_depth (path) != gtk_tree_path_get_depth (pos_path))
+        {
+          g_warning ("Given children are not in the same level\n");
+
+	  goto free_paths_and_out;
+        }
+
+      tmppath = gtk_tree_path_copy (pos_path);
+      gtk_tree_path_up (path);
+      gtk_tree_path_up (tmppath);
+
+      if (gtk_tree_path_get_depth (path) > 0 &&
+	  gtk_tree_path_compare (path, tmppath))
+        {
+          g_warning ("Given children are not in the same level\n");
+
+          gtk_tree_path_free (tmppath);
+	  goto free_paths_and_out;
+        }
+
+      gtk_tree_path_free (tmppath);
+    }
+
+  if (!path)
+    {
+      path = gtk_tree_store_get_path (GTK_TREE_MODEL (tree_store), iter);
+      gtk_tree_path_up (path);
+    }
+
+  depth = gtk_tree_path_get_depth (path);
+
+  if (depth)
+    {
+      gtk_tree_store_get_iter (GTK_TREE_MODEL (tree_store), 
+			       &parent_iter, path);
+
+      parent = G_NODE (parent_iter.user_data);
+    }
+  else
+    parent = G_NODE (tree_store->root);
+
+  /* yes, I know that this can be done shorter, but I'm doing it this way
+   * so the code is also maintainable
+   */
+
+  if (before && position)
+    {
+      b = G_NODE (position->user_data);
+
+      if (gtk_tree_path_get_indices (pos_path)[gtk_tree_path_get_depth (pos_path) - 1] > 0)
+        {
+          gtk_tree_path_prev (pos_path);
+          if (gtk_tree_store_get_iter (GTK_TREE_MODEL (tree_store), 
+				       &dst_a, pos_path))
+            a = G_NODE (dst_a.user_data);
+          else
+            a = NULL;
+          gtk_tree_path_next (pos_path);
+	}
+
+      /* if b is NULL, a is NULL too -- we are at the beginning of the list
+       * yes and we leak memory here ...
+       */
+      g_return_if_fail (b);
+    }
+  else if (before && !position)
+    {
+      /* move before without position is appending */
+      a = NULL;
+      b = NULL;
+    }
+  else /* !before */
+    {
+      if (position)
+        a = G_NODE (position->user_data);
+      else
+        a = NULL;
+
+      if (position)
+        {
+          gtk_tree_path_next (pos_path);
+          if (gtk_tree_store_get_iter (GTK_TREE_MODEL (tree_store), &dst_b, pos_path))
+             b = G_NODE (dst_b.user_data);
+          else
+             b = NULL;
+          gtk_tree_path_prev (pos_path);
+	}
+      else
+        {
+	  /* move after without position is prepending */
+	  if (depth)
+	    gtk_tree_store_iter_children (GTK_TREE_MODEL (tree_store), &dst_b,
+	                                  &parent_iter);
+	  else
+	    gtk_tree_store_iter_children (GTK_TREE_MODEL (tree_store), &dst_b,
+		                          NULL);
+
+	  b = G_NODE (dst_b.user_data);
+	}
+
+      /* if a is NULL, b is NULL too -- we are at the end of the list
+       * yes and we leak memory here ...
+       */
+      if (position)
+        g_return_if_fail (a);
+    }
+
+  /* counting nodes */
+  tmp = parent->children;
+
+  length = old_pos = 0;
+  while (tmp)
+    {
+      if (tmp == iter->user_data)
+	old_pos = length;
+
+      tmp = tmp->next;
+      length++;
+    }
+
+  /* remove node from list */
+  node = G_NODE (iter->user_data);
+  tmp_a = node->prev;
+  tmp_b = node->next;
+
+  if (tmp_a)
+    tmp_a->next = tmp_b;
+  else
+    parent->children = tmp_b;
+
+  if (tmp_b)
+    tmp_b->prev = tmp_a;
+
+  /* and reinsert the node */
+  if (a)
+    {
+      tmp = a->next;
+
+      a->next = node;
+      node->next = tmp;
+      node->prev = a;
+    }
+  else if (!a && !before)
+    {
+      tmp = parent->children;
+
+      node->prev = NULL;
+      parent->children = node;
+
+      node->next = tmp;
+      if (tmp) 
+	tmp->prev = node;
+
+      handle_b = FALSE;
+    }
+  else if (!a && before)
+    {
+      if (!position)
+        {
+          node->parent = NULL;
+          node->next = node->prev = NULL;
+
+          /* before with sibling = NULL appends */
+          g_node_insert_before (parent, NULL, node);
+	}
+      else
+        {
+	  node->parent = NULL;
+	  node->next = node->prev = NULL;
+
+	  /* after with sibling = NULL prepends */
+	  g_node_insert_after (parent, NULL, node);
+	}
+
+      handle_b = FALSE;
+    }
+
+  if (handle_b)
+    {
+      if (b)
+        {
+          tmp = b->prev;
+
+          b->prev = node;
+          node->prev = tmp;
+          node->next = b;
+        }
+      else if (!(!a && before)) /* !a && before is completely handled above */
+        node->next = NULL;
+    }
+
+  /* emit signal */
+  if (position)
+    new_pos = gtk_tree_path_get_indices (pos_path)[gtk_tree_path_get_depth (pos_path)-1];
+  else if (before)
+    {
+      if (depth)
+        new_pos = gtk_tree_store_iter_n_children (GTK_TREE_MODEL (tree_store),
+	                                          &parent_iter) - 1;
+      else
+	new_pos = gtk_tree_store_iter_n_children (GTK_TREE_MODEL (tree_store),
+	                                          NULL) - 1;
+    }
+  else
+    new_pos = 0;
+
+  if (new_pos > old_pos)
+    {
+      if (before && position)
+        new_pos--;
+    }
+  else
+    {
+      if (!before && position)
+        new_pos++;
+    }
+
+  order = g_new (gint, length);
+  if (new_pos > old_pos)
+    {
+      for (i = 0; i < length; i++)
+        if (i < old_pos)
+          order[i] = i;
+        else if (i >= old_pos && i < new_pos)
+          order[i] = i + 1;
+        else if (i == new_pos)
+          order[i] = old_pos;
+        else
+	  order[i] = i;
+    }
+  else
+    {
+      for (i = 0; i < length; i++)
+        if (i == new_pos)
+	  order[i] = old_pos;
+        else if (i > new_pos && i <= old_pos)
+	  order[i] = i - 1;
+	else
+	  order[i] = i;
+    }
+
+  if (depth)
+    {
+      tmppath = gtk_tree_store_get_path (GTK_TREE_MODEL (tree_store), 
+					 &parent_iter);
+      gtk_tree_model_rows_reordered (GTK_TREE_MODEL (tree_store),
+				     tmppath, &parent_iter, order);
+    }
+  else
+    {
+      tmppath = gtk_tree_path_new ();
+      gtk_tree_model_rows_reordered (GTK_TREE_MODEL (tree_store),
+				     tmppath, NULL, order);
+    }
+
+  gtk_tree_path_free (tmppath);
+  gtk_tree_path_free (path);
+  if (position)
+    gtk_tree_path_free (pos_path);
+  g_free (order);
+
+  return;
+
+free_paths_and_out:
+  gtk_tree_path_free (path);
+  gtk_tree_path_free (pos_path);
+}
+
+/**
+ * gtk_tree_store_move_before:
+ * @tree_store: A #GtkTreeStore.
+ * @iter: A #GtkTreeIter.
+ * @position: A #GtkTreeIter or %NULL.
+ *
+ * Moves @iter in @tree_store to the position before @position. @iter and
+ * @position should be in the same level. Note that this function only
+ * works with unsorted stores. If @position is %NULL, @iter will be
+ * moved to the end of the level.
+ *
+ * Since: 2.2
+ **/
+void
+gtk_tree_store_move_before (GtkTreeStore *tree_store,
+                            GtkTreeIter  *iter,
+			    GtkTreeIter  *position)
+{
+  gtk_tree_store_move (tree_store, iter, position, TRUE);
+}
+
+/**
+ * gtk_tree_store_move_after:
+ * @tree_store: A #GtkTreeStore.
+ * @iter: A #GtkTreeIter.
+ * @position: A #GtkTreeIter.
+ *
+ * Moves @iter in @tree_store to the position after @position. @iter and
+ * @position should be in the same level. Note that this function only
+ * works with unsorted stores. If @position is %NULL, @iter will be moved
+ * to the start of the level.
+ *
+ * Since: 2.2
+ **/
+void
+gtk_tree_store_move_after (GtkTreeStore *tree_store,
+                           GtkTreeIter  *iter,
+			   GtkTreeIter  *position)
+{
+  gtk_tree_store_move (tree_store, iter, position, FALSE);
+}
+
+/* Sorting */
+static gint
+gtk_tree_store_compare_func (gconstpointer a,
+			     gconstpointer b,
+			     gpointer      user_data)
+{
+  GtkTreeStore *tree_store = user_data;
+  GNode *node_a;
+  GNode *node_b;
+  GtkTreeIterCompareFunc func;
+  gpointer data;
+
+  GtkTreeIter iter_a;
+  GtkTreeIter iter_b;
+  gint retval;
+
+  if (tree_store->sort_column_id != -1)
+    {
+      GtkTreeDataSortHeader *header;
+
+      header = _foo_tree_data_list_get_header (tree_store->sort_list,
+					       tree_store->sort_column_id);
+      g_return_val_if_fail (header != NULL, 0);
+      g_return_val_if_fail (header->func != NULL, 0);
+
+      func = header->func;
+      data = header->data;
+    }
+  else
+    {
+      g_return_val_if_fail (tree_store->default_sort_func != NULL, 0);
+      func = tree_store->default_sort_func;
+      data = tree_store->default_sort_data;
+    }
+
+  node_a = ((SortTuple *) a)->node;
+  node_b = ((SortTuple *) b)->node;
+
+  iter_a.stamp = tree_store->stamp;
+  iter_a.user_data = node_a;
+  iter_b.stamp = tree_store->stamp;
+  iter_b.user_data = node_b;
+
+  retval = (* func) (GTK_TREE_MODEL (user_data), &iter_a, &iter_b, data);
+
+  if (tree_store->order == GTK_SORT_DESCENDING)
+    {
+      if (retval > 0)
+	retval = -1;
+      else if (retval < 0)
+	retval = 1;
+    }
+  return retval;
+}
+
+static void
+gtk_tree_store_sort_helper (GtkTreeStore *tree_store,
+			    GNode        *parent,
+			    gboolean      recurse)
+{
+  GtkTreeIter iter;
+  GArray *sort_array;
+  GNode *node;
+  GNode *tmp_node;
+  gint list_length;
+  gint i;
+  gint *new_order;
+  GtkTreePath *path;
+
+  node = parent->children;
+  if (node == NULL || node->next == NULL)
+    {
+      if (recurse && node && node->children)
+        gtk_tree_store_sort_helper (tree_store, node, TRUE);
+
+      return;
+    }
+
+  list_length = 0;
+  for (tmp_node = node; tmp_node; tmp_node = tmp_node->next)
+    list_length++;
+
+  sort_array = g_array_sized_new (FALSE, FALSE, sizeof (SortTuple), list_length);
+
+  i = 0;
+  for (tmp_node = node; tmp_node; tmp_node = tmp_node->next)
+    {
+      SortTuple tuple;
+
+      tuple.offset = i;
+      tuple.node = tmp_node;
+      g_array_append_val (sort_array, tuple);
+      i++;
+    }
+
+  /* Sort the array */
+  g_array_sort_with_data (sort_array, gtk_tree_store_compare_func, tree_store);
+
+  for (i = 0; i < list_length - 1; i++)
+    {
+      g_array_index (sort_array, SortTuple, i).node->next =
+	g_array_index (sort_array, SortTuple, i + 1).node;
+      g_array_index (sort_array, SortTuple, i + 1).node->prev =
+	g_array_index (sort_array, SortTuple, i).node;
+    }
+  g_array_index (sort_array, SortTuple, list_length - 1).node->next = NULL;
+  g_array_index (sort_array, SortTuple, 0).node->prev = NULL;
+  parent->children = g_array_index (sort_array, SortTuple, 0).node;
+
+  /* Let the world know about our new order */
+  new_order = g_new (gint, list_length);
+  for (i = 0; i < list_length; i++)
+    new_order[i] = g_array_index (sort_array, SortTuple, i).offset;
+
+  iter.stamp = tree_store->stamp;
+  iter.user_data = parent;
+  path = gtk_tree_store_get_path (GTK_TREE_MODEL (tree_store), &iter);
+  gtk_tree_model_rows_reordered (GTK_TREE_MODEL (tree_store),
+				 path, &iter, new_order);
+  gtk_tree_path_free (path);
+  g_free (new_order);
+  g_array_free (sort_array, TRUE);
+
+  if (recurse)
+    {
+      for (tmp_node = parent->children; tmp_node; tmp_node = tmp_node->next)
+	{
+	  if (tmp_node->children)
+	    gtk_tree_store_sort_helper (tree_store, tmp_node, TRUE);
+	}
+    }
+}
+
+static void
+gtk_tree_store_sort (GtkTreeStore *tree_store)
+{
+  if (!GTK_TREE_STORE_IS_SORTED (tree_store))
+    return;
+
+  if (tree_store->sort_column_id != -1)
+    {
+      GtkTreeDataSortHeader *header = NULL;
+
+      header = _foo_tree_data_list_get_header (tree_store->sort_list, 
+					       tree_store->sort_column_id);
+
+      /* We want to make sure that we have a function */
+      g_return_if_fail (header != NULL);
+      g_return_if_fail (header->func != NULL);
+    }
+  else
+    {
+      g_return_if_fail (tree_store->default_sort_func != NULL);
+    }
+
+  gtk_tree_store_sort_helper (tree_store, G_NODE (tree_store->root), TRUE);
+}
+
+static void
+gtk_tree_store_sort_iter_changed (GtkTreeStore *tree_store,
+				  GtkTreeIter  *iter,
+				  gint          column,
+				  gboolean      emit_signal)
+{
+  GNode *prev = NULL;
+  GNode *next = NULL;
+  GNode *node;
+  GtkTreePath *tmp_path;
+  GtkTreeIter tmp_iter;
+  gint cmp_a = 0;
+  gint cmp_b = 0;
+  gint i;
+  gint old_location;
+  gint new_location;
+  gint *new_order;
+  gint length;
+  GtkTreeIterCompareFunc func;
+  gpointer data;
+
+  g_return_if_fail (G_NODE (iter->user_data)->parent != NULL);
+
+  tmp_iter.stamp = tree_store->stamp;
+  if (tree_store->sort_column_id != -1)
+    {
+      GtkTreeDataSortHeader *header;
+      header = _foo_tree_data_list_get_header (tree_store->sort_list,
+					       tree_store->sort_column_id);
+      g_return_if_fail (header != NULL);
+      g_return_if_fail (header->func != NULL);
+      func = header->func;
+      data = header->data;
+    }
+  else
+    {
+      g_return_if_fail (tree_store->default_sort_func != NULL);
+      func = tree_store->default_sort_func;
+      data = tree_store->default_sort_data;
+    }
+
+  /* If it's the built in function, we don't sort. */
+  if (func == _foo_tree_data_list_compare_func &&
+      tree_store->sort_column_id != column)
+    return;
+
+  old_location = 0;
+  node = G_NODE (iter->user_data)->parent->children;
+  /* First we find the iter, its prev, and its next */
+  while (node)
+    {
+      if (node == G_NODE (iter->user_data))
+	break;
+      old_location++;
+      node = node->next;
+    }
+  g_assert (node != NULL);
+
+  prev = node->prev;
+  next = node->next;
+
+  /* Check the common case, where we don't need to sort it moved. */
+  if (prev != NULL)
+    {
+      tmp_iter.user_data = prev;
+      cmp_a = (* func) (GTK_TREE_MODEL (tree_store), &tmp_iter, iter, data);
+    }
+
+  if (next != NULL)
+    {
+      tmp_iter.user_data = next;
+      cmp_b = (* func) (GTK_TREE_MODEL (tree_store), iter, &tmp_iter, data);
+    }
+
+  if (tree_store->order == GTK_SORT_DESCENDING)
+    {
+      if (cmp_a < 0)
+	cmp_a = 1;
+      else if (cmp_a > 0)
+	cmp_a = -1;
+
+      if (cmp_b < 0)
+	cmp_b = 1;
+      else if (cmp_b > 0)
+	cmp_b = -1;
+    }
+
+  if (prev == NULL && cmp_b <= 0)
+    return;
+  else if (next == NULL && cmp_a <= 0)
+    return;
+  else if (prev != NULL && next != NULL &&
+	   cmp_a <= 0 && cmp_b <= 0)
+    return;
+
+  /* We actually need to sort it */
+  /* First, remove the old link. */
+
+  if (prev)
+    prev->next = next;
+  else
+    node->parent->children = next;
+
+  if (next)
+    next->prev = prev;
+
+  node->prev = NULL;
+  node->next = NULL;
+
+  /* FIXME: as an optimization, we can potentially start at next */
+  prev = NULL;
+  node = node->parent->children;
+  new_location = 0;
+  tmp_iter.user_data = node;
+  if (tree_store->order == GTK_SORT_DESCENDING)
+    cmp_a = (* func) (GTK_TREE_MODEL (tree_store), &tmp_iter, iter, data);
+  else
+    cmp_a = (* func) (GTK_TREE_MODEL (tree_store), iter, &tmp_iter, data);
+
+  while ((node->next) && (cmp_a > 0))
+    {
+      prev = node;
+      node = node->next;
+      new_location++;
+      tmp_iter.user_data = node;
+      if (tree_store->order == GTK_SORT_DESCENDING)
+	cmp_a = (* func) (GTK_TREE_MODEL (tree_store), &tmp_iter, iter, data);
+      else
+	cmp_a = (* func) (GTK_TREE_MODEL (tree_store), iter, &tmp_iter, data);
+    }
+
+  if ((!node->next) && (cmp_a > 0))
+    {
+      new_location++;
+      node->next = G_NODE (iter->user_data);
+      node->next->prev = node;
+    }
+  else if (prev)
+    {
+      prev->next = G_NODE (iter->user_data);
+      prev->next->prev = prev;
+      G_NODE (iter->user_data)->next = node;
+      G_NODE (iter->user_data)->next->prev = G_NODE (iter->user_data);
+    }
+  else
+    {
+      G_NODE (iter->user_data)->next = G_NODE (iter->user_data)->parent->children;
+      G_NODE (iter->user_data)->next->prev = G_NODE (iter->user_data);
+      G_NODE (iter->user_data)->parent->children = G_NODE (iter->user_data);
+    }
+
+  if (!emit_signal)
+    return;
+
+  /* Emit the reordered signal. */
+  length = g_node_n_children (node->parent);
+  new_order = g_new (int, length);
+  if (old_location < new_location)
+    for (i = 0; i < length; i++)
+      {
+	if (i < old_location ||
+	    i > new_location)
+	  new_order[i] = i;
+	else if (i >= old_location &&
+		 i < new_location)
+	  new_order[i] = i + 1;
+	else if (i == new_location)
+	  new_order[i] = old_location;
+      }
+  else
+    for (i = 0; i < length; i++)
+      {
+	if (i < new_location ||
+	    i > old_location)
+	  new_order[i] = i;
+	else if (i > new_location &&
+		 i <= old_location)
+	  new_order[i] = i - 1;
+	else if (i == new_location)
+	  new_order[i] = old_location;
+      }
+
+  tmp_iter.user_data = node->parent;
+  tmp_path = gtk_tree_store_get_path (GTK_TREE_MODEL (tree_store), &tmp_iter);
+
+  gtk_tree_model_rows_reordered (GTK_TREE_MODEL (tree_store),
+				 tmp_path, &tmp_iter,
+				 new_order);
+
+  gtk_tree_path_free (tmp_path);
+  g_free (new_order);
+}
+
+
+static gboolean
+gtk_tree_store_get_sort_column_id (GtkTreeSortable  *sortable,
+				   gint             *sort_column_id,
+				   GtkSortType      *order)
+{
+  GtkTreeStore *tree_store = (GtkTreeStore *) sortable;
+
+  if (sort_column_id)
+    * sort_column_id = tree_store->sort_column_id;
+  if (order)
+    * order = tree_store->order;
+
+  if (tree_store->sort_column_id == GTK_TREE_SORTABLE_DEFAULT_SORT_COLUMN_ID ||
+      tree_store->sort_column_id == GTK_TREE_SORTABLE_UNSORTED_SORT_COLUMN_ID)
+    return FALSE;
+
+  return TRUE;
+}
+
+static void
+gtk_tree_store_set_sort_column_id (GtkTreeSortable  *sortable,
+				   gint              sort_column_id,
+				   GtkSortType       order)
+{
+  GtkTreeStore *tree_store = (GtkTreeStore *) sortable;
+
+  
+  if ((tree_store->sort_column_id == sort_column_id) &&
+      (tree_store->order == order))
+    return;
+
+  if (sort_column_id != GTK_TREE_SORTABLE_UNSORTED_SORT_COLUMN_ID)
+    {
+      if (sort_column_id != GTK_TREE_SORTABLE_DEFAULT_SORT_COLUMN_ID)
+	{
+	  GtkTreeDataSortHeader *header = NULL;
+
+	  header = _foo_tree_data_list_get_header (tree_store->sort_list, 
+						   sort_column_id);
+
+	  /* We want to make sure that we have a function */
+	  g_return_if_fail (header != NULL);
+	  g_return_if_fail (header->func != NULL);
+	}
+      else
+	{
+	  g_return_if_fail (tree_store->default_sort_func != NULL);
+	}
+    }
+
+  tree_store->sort_column_id = sort_column_id;
+  tree_store->order = order;
+
+  gtk_tree_sortable_sort_column_changed (sortable);
+
+  gtk_tree_store_sort (tree_store);
+}
+
+static void
+gtk_tree_store_set_sort_func (GtkTreeSortable        *sortable,
+			      gint                    sort_column_id,
+			      GtkTreeIterCompareFunc  func,
+			      gpointer                data,
+			      GDestroyNotify          destroy)
+{
+  GtkTreeStore *tree_store = (GtkTreeStore *) sortable;
+
+  tree_store->sort_list = _foo_tree_data_list_set_header (tree_store->sort_list, 
+							  sort_column_id, 
+							  func, data, destroy);
+
+  if (tree_store->sort_column_id == sort_column_id)
+    gtk_tree_store_sort (tree_store);
+}
+
+static void
+gtk_tree_store_set_default_sort_func (GtkTreeSortable        *sortable,
+				      GtkTreeIterCompareFunc  func,
+				      gpointer                data,
+				      GDestroyNotify          destroy)
+{
+  GtkTreeStore *tree_store = (GtkTreeStore *) sortable;
+
+  if (tree_store->default_sort_destroy)
+    {
+      GDestroyNotify d = tree_store->default_sort_destroy;
+
+      tree_store->default_sort_destroy = NULL;
+      d (tree_store->default_sort_data);
+    }
+
+  tree_store->default_sort_func = func;
+  tree_store->default_sort_data = data;
+  tree_store->default_sort_destroy = destroy;
+
+  if (tree_store->sort_column_id == GTK_TREE_SORTABLE_DEFAULT_SORT_COLUMN_ID)
+    gtk_tree_store_sort (tree_store);
+}
+
+static gboolean
+gtk_tree_store_has_default_sort_func (GtkTreeSortable *sortable)
+{
+  GtkTreeStore *tree_store = (GtkTreeStore *) sortable;
+
+  return (tree_store->default_sort_func != NULL);
+}
+
+static void
+validate_gnode (GNode* node)
+{
+  GNode *iter;
+
+  iter = node->children;
+  while (iter != NULL)
+    {
+      g_assert (iter->parent == node);
+      if (iter->prev)
+        g_assert (iter->prev->next == iter);
+      validate_gnode (iter);
+      iter = iter->next;
+    }
+}
+
+/* GtkBuildable custom tag implementation
+ *
+ * <columns>
+ *   <column type="..."/>
+ *   <column type="..."/>
+ * </columns>
+ */
+typedef struct {
+  GtkBuilder *builder;
+  GObject *object;
+  GSList *items;
+} GSListSubParserData;
+
+static void
+tree_model_start_element (GMarkupParseContext *context,
+			  const gchar         *element_name,
+			  const gchar        **names,
+			  const gchar        **values,
+			  gpointer            user_data,
+			  GError            **error)
+{
+  guint i;
+  GSListSubParserData *data = (GSListSubParserData*)user_data;
+
+  for (i = 0; names[i]; i++)
+    {
+      if (strcmp (names[i], "type") == 0)
+	data->items = g_slist_prepend (data->items, g_strdup (values[i]));
+    }
+}
+
+static void
+tree_model_end_element (GMarkupParseContext *context,
+			const gchar         *element_name,
+			gpointer             user_data,
+			GError             **error)
+{
+  GSListSubParserData *data = (GSListSubParserData*)user_data;
+
+  g_assert(data->builder);
+
+  if (strcmp (element_name, "columns") == 0)
+    {
+      GSList *l;
+      GType *types;
+      int i;
+      GType type;
+
+      data = (GSListSubParserData*)user_data;
+      data->items = g_slist_reverse (data->items);
+      types = g_new0 (GType, g_slist_length (data->items));
+
+      for (l = data->items, i = 0; l; l = l->next, i++)
+        {
+          type = gtk_builder_get_type_from_name (data->builder, l->data);
+          if (type == G_TYPE_INVALID)
+            {
+              g_warning ("Unknown type %s specified in treemodel %s",
+                         (const gchar*)l->data,
+                         gtk_buildable_get_name (GTK_BUILDABLE (data->object)));
+              continue;
+            }
+          types[i] = type;
+
+          g_free (l->data);
+        }
+
+      gtk_tree_store_set_column_types (GTK_TREE_STORE (data->object), i, types);
+
+      g_free (types);
+    }
+  else if (strcmp (element_name, "column") == 0)
+    ;
+}
+
+static const GMarkupParser tree_model_parser =
+  {
+    tree_model_start_element,
+    tree_model_end_element
+  };
+
+
+static gboolean
+gtk_tree_store_buildable_custom_tag_start (GtkBuildable  *buildable,
+					   GtkBuilder    *builder,
+					   GObject       *child,
+					   const gchar   *tagname,
+					   GMarkupParser *parser,
+					   gpointer      *data)
+{
+  GSListSubParserData *parser_data;
+
+  if (child)
+    return FALSE;
+
+  if (strcmp (tagname, "columns") == 0)
+    {
+      parser_data = g_slice_new0 (GSListSubParserData);
+      parser_data->builder = builder;
+      parser_data->items = NULL;
+      parser_data->object = G_OBJECT (buildable);
+
+      *parser = tree_model_parser;
+      *data = parser_data;
+      return TRUE;
+    }
+
+  return FALSE;
+}
+
+static void
+gtk_tree_store_buildable_custom_finished (GtkBuildable *buildable,
+					  GtkBuilder   *builder,
+					  GObject      *child,
+					  const gchar  *tagname,
+					  gpointer      user_data)
+{
+  GSListSubParserData *data;
+
+  if (strcmp (tagname, "columns"))
+    return;
+
+  data = (GSListSubParserData*)user_data;
+
+  g_slist_free (data->items);
+  g_slice_free (GSListSubParserData, data);
+}
diff --git a/footreestore.h b/footreestore.h
new file mode 100644
index 0000000..b47b1ec
--- /dev/null
+++ b/footreestore.h
@@ -0,0 +1,159 @@
+/* gtktreestore.h
+ * 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.
+ */
+
+#if defined(GTK_DISABLE_SINGLE_INCLUDES) && !defined (__GTK_H_INSIDE__) && !defined (GTK_COMPILATION)
+#error "Only <gtk/gtk.h> can be included directly."
+#endif
+
+#ifndef __GTK_TREE_STORE_H__
+#define __GTK_TREE_STORE_H__
+
+#include <gdkconfig.h>
+#include <gtk/gtktreemodel.h>
+#include <gtk/gtktreesortable.h>
+#include <stdarg.h>
+
+
+G_BEGIN_DECLS
+
+
+#define GTK_TYPE_TREE_STORE			(gtk_tree_store_get_type ())
+#define GTK_TREE_STORE(obj)			(G_TYPE_CHECK_INSTANCE_CAST ((obj), GTK_TYPE_TREE_STORE, GtkTreeStore))
+#define GTK_TREE_STORE_CLASS(klass)		(G_TYPE_CHECK_CLASS_CAST ((klass), GTK_TYPE_TREE_STORE, GtkTreeStoreClass))
+#define GTK_IS_TREE_STORE(obj)			(G_TYPE_CHECK_INSTANCE_TYPE ((obj), GTK_TYPE_TREE_STORE))
+#define GTK_IS_TREE_STORE_CLASS(klass)		(G_TYPE_CHECK_CLASS_TYPE ((klass), GTK_TYPE_TREE_STORE))
+#define GTK_TREE_STORE_GET_CLASS(obj)		(G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_TREE_STORE, GtkTreeStoreClass))
+
+typedef struct _GtkTreeStore       GtkTreeStore;
+typedef struct _GtkTreeStoreClass  GtkTreeStoreClass;
+
+struct _GtkTreeStore
+{
+  GObject parent;
+
+  gint GSEAL (stamp);
+  gpointer GSEAL (root);
+  gpointer GSEAL (last);
+  gint GSEAL (n_columns);
+  gint GSEAL (sort_column_id);
+  GList *GSEAL (sort_list);
+  GtkSortType GSEAL (order);
+  GType *GSEAL (column_headers);
+  GtkTreeIterCompareFunc GSEAL (default_sort_func);
+  gpointer GSEAL (default_sort_data);
+  GDestroyNotify GSEAL (default_sort_destroy);
+  guint GSEAL (columns_dirty) : 1;
+};
+
+struct _GtkTreeStoreClass
+{
+  GObjectClass parent_class;
+
+  /* Padding for future expansion */
+  void (*_gtk_reserved1) (void);
+  void (*_gtk_reserved2) (void);
+  void (*_gtk_reserved3) (void);
+  void (*_gtk_reserved4) (void);
+};
+
+
+GType         gtk_tree_store_get_type         (void) G_GNUC_CONST;
+GtkTreeStore *gtk_tree_store_new              (gint          n_columns,
+					       ...);
+GtkTreeStore *gtk_tree_store_newv             (gint          n_columns,
+					       GType        *types);
+void          gtk_tree_store_set_column_types (GtkTreeStore *tree_store,
+					       gint          n_columns,
+					       GType        *types);
+
+/* NOTE: use gtk_tree_model_get to get values from a GtkTreeStore */
+
+void          gtk_tree_store_set_value        (GtkTreeStore *tree_store,
+					       GtkTreeIter  *iter,
+					       gint          column,
+					       GValue       *value);
+void          gtk_tree_store_set              (GtkTreeStore *tree_store,
+					       GtkTreeIter  *iter,
+					       ...);
+void          gtk_tree_store_set_valuesv      (GtkTreeStore *tree_store,
+					       GtkTreeIter  *iter,
+					       gint         *columns,
+					       GValue       *values,
+					       gint          n_values);
+void          gtk_tree_store_set_valist       (GtkTreeStore *tree_store,
+					       GtkTreeIter  *iter,
+					       va_list       var_args);
+gboolean      gtk_tree_store_remove           (GtkTreeStore *tree_store,
+					       GtkTreeIter  *iter);
+void          gtk_tree_store_insert           (GtkTreeStore *tree_store,
+					       GtkTreeIter  *iter,
+					       GtkTreeIter  *parent,
+					       gint          position);
+void          gtk_tree_store_insert_before    (GtkTreeStore *tree_store,
+					       GtkTreeIter  *iter,
+					       GtkTreeIter  *parent,
+					       GtkTreeIter  *sibling);
+void          gtk_tree_store_insert_after     (GtkTreeStore *tree_store,
+					       GtkTreeIter  *iter,
+					       GtkTreeIter  *parent,
+					       GtkTreeIter  *sibling);
+void          gtk_tree_store_insert_with_values (GtkTreeStore *tree_store,
+						 GtkTreeIter  *iter,
+						 GtkTreeIter  *parent,
+						 gint          position,
+						 ...);
+void          gtk_tree_store_insert_with_valuesv (GtkTreeStore *tree_store,
+						  GtkTreeIter  *iter,
+						  GtkTreeIter  *parent,
+						  gint          position,
+						  gint         *columns,
+						  GValue       *values,
+						  gint          n_values);
+void          gtk_tree_store_prepend          (GtkTreeStore *tree_store,
+					       GtkTreeIter  *iter,
+					       GtkTreeIter  *parent);
+void          gtk_tree_store_append           (GtkTreeStore *tree_store,
+					       GtkTreeIter  *iter,
+					       GtkTreeIter  *parent);
+gboolean      gtk_tree_store_is_ancestor      (GtkTreeStore *tree_store,
+					       GtkTreeIter  *iter,
+					       GtkTreeIter  *descendant);
+gint          gtk_tree_store_iter_depth       (GtkTreeStore *tree_store,
+					       GtkTreeIter  *iter);
+void          gtk_tree_store_clear            (GtkTreeStore *tree_store);
+gboolean      gtk_tree_store_iter_is_valid    (GtkTreeStore *tree_store,
+                                               GtkTreeIter  *iter);
+void          gtk_tree_store_reorder          (GtkTreeStore *tree_store,
+                                               GtkTreeIter  *parent,
+                                               gint         *new_order);
+void          gtk_tree_store_swap             (GtkTreeStore *tree_store,
+                                               GtkTreeIter  *a,
+                                               GtkTreeIter  *b);
+void          gtk_tree_store_move_before      (GtkTreeStore *tree_store,
+                                               GtkTreeIter  *iter,
+                                               GtkTreeIter  *position);
+void          gtk_tree_store_move_after       (GtkTreeStore *tree_store,
+                                               GtkTreeIter  *iter,
+                                               GtkTreeIter  *position);
+
+
+G_END_DECLS
+
+
+#endif /* __GTK_TREE_STORE_H__ */



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