talons

gtksctree.c (56122B)

---

 /*
  * Claws Mail -- a GTK based, lightweight, and fast e-mail client
  * Parts of this file:
  * Copyright (C) 1999-2012 Hiroyuki Yamamoto and the Claws Mail team
  *
  * Parts of this file from gtk/gtkctree.c and gtk/gtkclist.c:
  * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball, Josh MacDonald,
  * Copyright (C) 1997-1998 Jay Painter <jpaint@serv.net><jpaint@gimp.org>
  *
  * Parts of this file from gtkflist.c:
  * Copyright (C) 1999 The Free Software Foundation
  * Author: Federico Mena <federico@nuclecu.unam.mx>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation; either version 3 of the License, or
  * (at your option) any later version.
  *
  * This program 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 General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  *
  */
 
 #include <stdlib.h>
 
 #include "gtksctree.h"
 #include "claws-marshal.h"
 #include "prefs_common.h"
 #include "utils.h"
 #include "gtkutils.h"
 
 #define CLIST_UNFROZEN(clist)     (((GtkCMCList*) (clist))->freeze_count == 0)
 #define CLIST_REFRESH(clist)    G_STMT_START { \
   if (CLIST_UNFROZEN (clist)) \
     GTK_CMCLIST_GET_CLASS (clist)->refresh ((GtkCMCList*) (clist)); \
 } G_STMT_END
 #define CELL_SPACING               1
 #define CLIST_OPTIMUM_SIZE         64
 #define COLUMN_INSET               3
 #define PM_SIZE                    8
 #define TAB_SIZE                   (PM_SIZE + 6)
 #define ROW_TOP_YPIXEL(clist, row) (((clist)->row_height * (row)) + \
 				    (((row) + 1) * CELL_SPACING) + \
 				    (clist)->voffset)
 #define ROW_FROM_YPIXEL(clist, y)  (((y) - (clist)->voffset) / \
                                     ((clist)->row_height + CELL_SPACING))
 #define COLUMN_LEFT_XPIXEL(clist, col)  ((clist)->column[(col)].area.x \
                                     + (clist)->hoffset)
 #define COLUMN_LEFT(clist, column) ((clist)->column[(column)].area.x)
 
 enum {
 	ROW_POPUP_MENU,
 	EMPTY_POPUP_MENU,
 	OPEN_ROW,
 	START_DRAG,
 	LAST_SIGNAL
 };
 
 static void gtk_sctree_class_init (GtkSCTreeClass *class);
 static void gtk_sctree_init (GtkSCTree *sctree);
 
 static gint gtk_sctree_button_press (GtkWidget *widget, GdkEventButton *event);
 static gint gtk_sctree_button_release (GtkWidget *widget, GdkEventButton *event);
 static gint gtk_sctree_motion (GtkWidget *widget, GdkEventMotion *event);
 static void gtk_sctree_drag_begin (GtkWidget *widget, GdkDragContext *context);
 static void gtk_sctree_drag_end (GtkWidget *widget, GdkDragContext *context);
 static void gtk_sctree_drag_data_get (GtkWidget *widget, GdkDragContext *context,
 				     GtkSelectionData *data, guint info, guint time);
 static void gtk_sctree_drag_leave (GtkWidget *widget, GdkDragContext *context, guint time);
 static gboolean gtk_sctree_drag_motion (GtkWidget *widget, GdkDragContext *context,
 				       gint x, gint y, guint time);
 static gboolean gtk_sctree_drag_drop (GtkWidget *widget, GdkDragContext *context,
 				     gint x, gint y, guint time);
 static void gtk_sctree_drag_data_received (GtkWidget *widget, GdkDragContext *context,
 					  gint x, gint y, GtkSelectionData *data,
 					  guint info, guint time);
 
 static void gtk_sctree_clear (GtkCMCList *clist);
 static void gtk_sctree_real_unselect_all (GtkCMCList *clist);
 
 static void stree_sort (GtkCMCTree *ctree, GtkCMCTreeNode  *node, gpointer data);
 void gtk_sctree_sort_node (GtkCMCTree *ctree, GtkCMCTreeNode *node);
 void gtk_sctree_sort_recursive (GtkCMCTree *ctree, GtkCMCTreeNode *node);
 
 static void gtk_sctree_link (GtkCMCTree *ctree,
 			GtkCMCTreeNode  *node,
 			GtkCMCTreeNode  *parent,
 			GtkCMCTreeNode  *sibling,
 			gboolean       update_focus_row);
 
 static void gtk_sctree_unlink (GtkCMCTree      *ctree,
 			GtkCMCTreeNode  *node,
 			gboolean       update_focus_row);
 
 static void stree_update_level (GtkCMCTree      *ctree,
 			GtkCMCTreeNode  *node,
 			gpointer       data);
 
 static GtkCMCTreeNode * gtk_sctree_last_visible (GtkCMCTree     *ctree,
 					      GtkCMCTreeNode *node);
 static void gtk_sctree_real_tree_expand            (GtkCMCTree      *ctree,
 						 GtkCMCTreeNode  *node);
 static void gtk_sctree_real_tree_collapse          (GtkCMCTree      *ctree,
 						 GtkCMCTreeNode  *node);
 static void
 sreal_tree_move (GtkCMCTree     *ctree,
 		GtkCMCTreeNode *node,
 		GtkCMCTreeNode *new_parent,
 		GtkCMCTreeNode *new_sibling);
 
 static GtkCMCTreeClass *parent_class;
 
 static guint sctree_signals[LAST_SIGNAL];
 
 /**
  * gtk_sctree_get_type:
  * @void:
  *
  * Creates the GtkSCTree class and its type information
  *
  * Return value: The type ID for GtkSCTreeClass
  **/
 GType
 gtk_sctree_get_type (void)
 {
 	static GType sctree_type = 0;
 
 	if (!sctree_type) {
 		GTypeInfo sctree_info = {
 			sizeof (GtkSCTreeClass),
 
 			(GBaseInitFunc) NULL,
 			(GBaseFinalizeFunc) NULL,
 
 			(GClassInitFunc) gtk_sctree_class_init,
 			(GClassFinalizeFunc) NULL,
 			NULL,	/* class_data */
 
 			sizeof (GtkSCTree),
 			0,	/* n_preallocs */
 			(GInstanceInitFunc) gtk_sctree_init,
 
 			(const GTypeValueTable *) NULL	/* value table */
 		};
 
 		sctree_type = g_type_register_static (GTK_TYPE_CMCTREE, "GtkSCTree", &sctree_info, (GTypeFlags)0);
 	}
 
 	return sctree_type;
 }
 
 static void
 gtk_sctree_change_focus_row_expansion (GtkCMCTree          *ctree,
 			    GtkCMCTreeExpansionType action)
 {
   GtkCMCList *clist;
   GtkCMCTreeNode *node;
 
   cm_return_if_fail (GTK_IS_CMCTREE (ctree));
 
   clist = GTK_CMCLIST (ctree);
 
   if (gtkut_pointer_is_grabbed (GTK_WIDGET (ctree)) &&
       gtk_widget_has_grab (GTK_WIDGET(ctree)))
     return;
 
   if (!(node =
 	GTK_CMCTREE_NODE (g_list_nth (clist->row_list, clist->focus_row))) ||
       GTK_CMCTREE_ROW (node)->is_leaf || !(GTK_CMCTREE_ROW (node)->children))
     return;
 
   switch (action)
     {
     case GTK_CMCTREE_EXPANSION_EXPAND:
       if (GTK_SCTREE(ctree)->always_expand_recursively)
 	      gtk_cmctree_expand_recursive (ctree, node);
       else
 	      gtk_cmctree_expand (ctree, node);
 
       break;
     case GTK_CMCTREE_EXPANSION_EXPAND_RECURSIVE:
       gtk_cmctree_expand_recursive (ctree, node);
       break;
     case GTK_CMCTREE_EXPANSION_COLLAPSE:
       gtk_cmctree_collapse (ctree, node);
       break;
     case GTK_CMCTREE_EXPANSION_COLLAPSE_RECURSIVE:
       gtk_cmctree_collapse_recursive (ctree, node);
       break;
     case GTK_CMCTREE_EXPANSION_TOGGLE:
       if (GTK_SCTREE(ctree)->always_expand_recursively)
 	      gtk_cmctree_toggle_expansion_recursive (ctree, node);
       else
 	      gtk_cmctree_toggle_expansion (ctree, node);
       break;
     case GTK_CMCTREE_EXPANSION_TOGGLE_RECURSIVE:
       gtk_cmctree_toggle_expansion_recursive (ctree, node);
       break;
     }
 }
 
 static void gtk_sctree_finalize(GObject *object)
 {
 	GtkSCTree *sctree = GTK_SCTREE(object);
 	g_free(sctree->use_markup);
 	sctree->use_markup = NULL;
 	G_OBJECT_CLASS (parent_class)->finalize (object);
 }
 
 /* Standard class initialization function */
 static void
 gtk_sctree_class_init (GtkSCTreeClass *klass)
 {
 	GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
 	GtkWidgetClass *widget_class;
 	GtkCMCListClass *clist_class;
 	GtkCMCTreeClass *ctree_class;
 
 	widget_class = (GtkWidgetClass *) klass;
 	clist_class = (GtkCMCListClass *) klass;
 	ctree_class = (GtkCMCTreeClass *) klass;
 
 	parent_class = g_type_class_peek (gtk_cmctree_get_type ());
 
 	sctree_signals[ROW_POPUP_MENU] =
 		g_signal_new ("row_popup_menu",
 			      G_TYPE_FROM_CLASS (klass),
 			      G_SIGNAL_RUN_FIRST,
 			      G_STRUCT_OFFSET (GtkSCTreeClass, row_popup_menu),
 			      NULL, NULL,
 			      claws_marshal_VOID__POINTER,
 			      G_TYPE_NONE, 1,
 			      GDK_TYPE_EVENT);
 	sctree_signals[EMPTY_POPUP_MENU] =
 		g_signal_new ("empty_popup_menu",
 			      G_TYPE_FROM_CLASS (klass),
 			      G_SIGNAL_RUN_FIRST,
 			      G_STRUCT_OFFSET (GtkSCTreeClass, empty_popup_menu),
 			      NULL, NULL,
 			      claws_marshal_VOID__POINTER,
 			      G_TYPE_NONE, 1,
 			      GDK_TYPE_EVENT);
 	sctree_signals[OPEN_ROW] =
 		g_signal_new ("open_row",
 			      G_TYPE_FROM_CLASS (klass),
 			      G_SIGNAL_RUN_FIRST,
 			      G_STRUCT_OFFSET (GtkSCTreeClass, open_row),
 			      NULL, NULL,
 			      g_cclosure_marshal_VOID__VOID,
 			      G_TYPE_NONE, 0);
 	sctree_signals[START_DRAG] =
 		g_signal_new ("start_drag",
 			      G_TYPE_FROM_CLASS (klass),
 			      G_SIGNAL_RUN_FIRST,
 			      G_STRUCT_OFFSET (GtkSCTreeClass, start_drag),
 			      NULL, NULL,
 			      claws_marshal_VOID__INT_POINTER,
 			      G_TYPE_NONE, 2,
 			      G_TYPE_INT,
 			      GDK_TYPE_EVENT);
 
 	/* gtk_object_class_add_signals (object_class, sctree_signals, LAST_SIGNAL); */
 
 	clist_class->clear = gtk_sctree_clear;
 	clist_class->unselect_all = gtk_sctree_real_unselect_all;
         ctree_class->tree_collapse = gtk_sctree_real_tree_collapse;
 	ctree_class->tree_expand = gtk_sctree_real_tree_expand;
 	ctree_class->tree_move = sreal_tree_move;
 	ctree_class->change_focus_row_expansion = gtk_sctree_change_focus_row_expansion;
 
 	widget_class->button_press_event = gtk_sctree_button_press;
 	widget_class->button_release_event = gtk_sctree_button_release;
 	widget_class->motion_notify_event = gtk_sctree_motion;
 	widget_class->drag_begin = gtk_sctree_drag_begin;
 	widget_class->drag_end = gtk_sctree_drag_end;
 	widget_class->drag_data_get = gtk_sctree_drag_data_get;
 	widget_class->drag_leave = gtk_sctree_drag_leave;
 	widget_class->drag_motion = gtk_sctree_drag_motion;
 	widget_class->drag_drop = gtk_sctree_drag_drop;
 	widget_class->drag_data_received = gtk_sctree_drag_data_received;
 
 	gobject_class->finalize = gtk_sctree_finalize;
 }
 
 /* Standard object initialization function */
 static void
 gtk_sctree_init (GtkSCTree *sctree)
 {
 	sctree->anchor_row = NULL;
 
 	/* GtkCMCTree does not specify pointer motion by default */
 	gtk_widget_add_events (GTK_WIDGET (sctree), GDK_POINTER_MOTION_MASK);
 	gtk_widget_add_events (GTK_WIDGET (sctree), GDK_POINTER_MOTION_MASK);
 }
 
 /* Get information the specified row is selected. */
 
 static gboolean
 row_is_selected(GtkSCTree *sctree, gint row)
 {
 	GtkCMCListRow *clist_row;
 	clist_row =  g_list_nth (GTK_CMCLIST(sctree)->row_list, row)->data;
 	return clist_row ? clist_row->state == GTK_STATE_SELECTED : FALSE;
 }
 
 /* Selects the rows between the anchor to the specified row, inclusive.  */
 static void
 select_range (GtkSCTree *sctree, gint row)
 {
 	gint prev_row;
 	gint min, max;
 	gint i;
 	GList *node;
 	if (sctree->anchor_row == NULL) {
 		prev_row = row;
 		sctree->anchor_row = gtk_cmctree_node_nth(GTK_CMCTREE(sctree), row);
 	} else
 		prev_row = g_list_position(GTK_CMCLIST(sctree)->row_list,
 					   (GList *)sctree->anchor_row);
 
 	if (row < prev_row) {
 		min = row;
 		max = prev_row;
 		GTK_CMCLIST(sctree)->focus_row = min;
 	} else {
 		min = prev_row;
 		max = row;
 	}
 	sctree->selecting_range++;
 
 	if (max < min) {
 		int t = min;
 		min = max;
 		max = t;
 	}
 
 	if (max - min > 10)
 		gtk_cmclist_freeze(GTK_CMCLIST(sctree));
 
 	node = g_list_nth((GTK_CMCLIST(sctree))->row_list, min);
 	for (i = min; i < max; i++) {
 		if (node && GTK_CMCTREE_ROW (node)->row.selectable) {
 			g_signal_emit_by_name(G_OBJECT(sctree), "tree_select_row",
 				node, -1);
 		}
 		node = node->next;
 	}
 	if (max - min > 10)
 		gtk_cmclist_thaw(GTK_CMCLIST(sctree));
 
 
 	sctree->selecting_range--;
 	gtk_cmclist_select_row (GTK_CMCLIST (sctree), max, -1);
 }
 
 /* Handles row selection according to the specified modifier state */
 /* in certain cases, we arrive here from a function knowing the GtkCMCTreeNode, and having
  * already slowly found row using g_list_position. In which case, _node will be non-NULL
  * to avoid this function having to slowly find it with g_list_nth. */
 static void
 select_row (GtkSCTree *sctree, gint row, gint col, guint state, GtkCMCTreeNode *_node)
 {
 	gboolean range, additive;
 	cm_return_if_fail (sctree != NULL);
 	cm_return_if_fail (GTK_IS_SCTREE (sctree));
 
 	range = ((state & GDK_SHIFT_MASK) != 0) &&
 		(GTK_CMCLIST(sctree)->selection_mode != GTK_SELECTION_SINGLE) &&
 		(GTK_CMCLIST(sctree)->selection_mode != GTK_SELECTION_BROWSE);
 	additive = ((state & GDK_CONTROL_MASK) != 0) &&
 		   (GTK_CMCLIST(sctree)->selection_mode != GTK_SELECTION_SINGLE) &&
 		   (GTK_CMCLIST(sctree)->selection_mode != GTK_SELECTION_BROWSE);
 
 	if (!range && !additive && sctree->force_additive_sel)
 		additive = TRUE;
 
 	GTK_CMCLIST(sctree)->focus_row = row;
 
 	if (!additive) {
 		gtk_cmclist_unselect_all (GTK_CMCLIST (sctree));
 	}
 
 	if (!range) {
 		GtkCMCTreeNode *node;
 
 		node = _node ? _node : gtk_cmctree_node_nth (GTK_CMCTREE(sctree), row);
 
 		/*No need to manage overlapped list*/
 		if (additive) {
 			if (row_is_selected(sctree, row))
 				gtk_cmclist_unselect_row (GTK_CMCLIST (sctree), row, col);
 			else
 				g_signal_emit_by_name
 					(G_OBJECT (sctree),
 					 "tree_select_row", node, col);
 		} else {
 			g_signal_emit_by_name
 				(G_OBJECT (sctree),
 				 "tree_select_row", node, col);
 		}
 		sctree->anchor_row = node;
 	} else
 		select_range (sctree, row);
 }
 
 static gboolean
 sctree_is_hot_spot (GtkSCTree     *sctree,
 		   GtkCMCTreeNode *node,
 		   gint          row,
 		   gint          x,
 		   gint          y)
 {
   GtkCMCTreeRow *tree_row;
   GtkCMCList *clist;
   GtkCMCTree *ctree;
   gint xl, xmax;
   gint yu;
   gint hotspot_size;
 
   cm_return_val_if_fail (GTK_IS_SCTREE (sctree), FALSE);
   cm_return_val_if_fail (node != NULL, FALSE);
 
   clist = GTK_CMCLIST (sctree);
   ctree = GTK_CMCTREE (sctree);
 
   if (!clist->column[ctree->tree_column].visible ||
       ctree->expander_style == GTK_CMCTREE_EXPANDER_NONE)
     return FALSE;
 
   tree_row = GTK_CMCTREE_ROW (node);
   if (!tree_row->children)
     return FALSE;
 
   hotspot_size = clist->row_height-2;
   if (hotspot_size > clist->column[ctree->tree_column].area.width - 2)
 	hotspot_size = clist->column[ctree->tree_column].area.width - 2;
 
   if (!GTK_CMCLIST_ROW_HEIGHT_SET(GTK_CMCLIST(clist)))
      yu = (ROW_TOP_YPIXEL (clist, row) + (clist->row_height - hotspot_size) / 2 -
 	(clist->row_height - 1) % 2);
   else
      yu = (ROW_TOP_YPIXEL (clist, row) + (clist->row_height/2 - hotspot_size) / 2 -
 	(clist->row_height/2 - 1) % 2);
 
   if (clist->column[ctree->tree_column].justification == GTK_JUSTIFY_RIGHT)
     xl = clist->column[ctree->tree_column].area.x +
 	  clist->column[ctree->tree_column].area.width - 1 + clist->hoffset -
 	  (tree_row->level - 1) * ctree->tree_indent - hotspot_size;
   else
     xl = clist->column[ctree->tree_column].area.x + clist->hoffset +
 	  (tree_row->level - 1) * ctree->tree_indent;
 
   xmax = xl + hotspot_size;
   return (x >= xl && x <= xmax && y >= yu && y <= yu + hotspot_size);
 }
 
 gboolean
 gtk_sctree_is_hot_spot (GtkSCTree *ctree,
 		       gint      x,
 		       gint      y)
 {
   GtkCMCTreeNode *node;
   gint column;
   gint row;
 
   cm_return_val_if_fail (GTK_IS_SCTREE (ctree), FALSE);
 
   if (gtk_cmclist_get_selection_info (GTK_CMCLIST (ctree), x, y, &row, &column))
     if ((node = GTK_CMCTREE_NODE(g_list_nth (GTK_CMCLIST (ctree)->row_list, row))))
       return sctree_is_hot_spot (ctree, node, row, x, y);
 
   return FALSE;
 }
 
 /* Our handler for button_press events.  We override all of GtkCMCList's broken
  * behavior.
  */
 static gint
 gtk_sctree_button_press (GtkWidget *widget, GdkEventButton *event)
 {
 	GtkSCTree *sctree;
 	GtkCMCList *clist;
 	gboolean on_row;
 	gint row;
 	gint col;
 	gint retval;
 
 	cm_return_val_if_fail (widget != NULL, FALSE);
 	cm_return_val_if_fail (GTK_IS_SCTREE (widget), FALSE);
 	cm_return_val_if_fail (event != NULL, FALSE);
 
 	sctree = GTK_SCTREE (widget);
 	clist = GTK_CMCLIST (widget);
 	retval = FALSE;
 
 	if (event->window != clist->clist_window)
 		return (* GTK_WIDGET_CLASS (parent_class)->button_press_event) (widget, event);
 
 	on_row = gtk_cmclist_get_selection_info (clist, event->x, event->y, &row, &col);
 
 	if (on_row && !gtk_widget_has_focus(widget))
 		gtk_widget_grab_focus (widget);
 
 	if (gtk_sctree_is_hot_spot (GTK_SCTREE(sctree), event->x, event->y)) {
 		GtkCMCTreeNode *node = gtk_cmctree_node_nth(GTK_CMCTREE(sctree), row);
 		if (GTK_CMCTREE_ROW (node)->expanded)
 			gtk_cmctree_collapse(GTK_CMCTREE(sctree), node);
 		else if (GTK_SCTREE(sctree)->always_expand_recursively)
 			gtk_cmctree_expand_recursive (GTK_CMCTREE(sctree), node);
 		else
 			gtk_cmctree_expand(GTK_CMCTREE(sctree), node);
 		return TRUE;
 	}
 
 	switch (event->type) {
 	case GDK_BUTTON_PRESS:
 		if (event->button == 1 || event->button == 2) {
 			if (event->button == 2)
 				event->state &= ~(GDK_SHIFT_MASK | GDK_CONTROL_MASK);
 			if (on_row) {
 				/* Save the mouse info for DnD */
 				sctree->dnd_press_button = event->button;
 				sctree->dnd_press_x = event->x;
 				sctree->dnd_press_y = event->y;
 
 				/* Handle selection */
 				if ((row_is_selected (sctree, row)
 				     && !(event->state & (GDK_CONTROL_MASK | GDK_SHIFT_MASK)))
 				    || ((event->state & GDK_CONTROL_MASK)
 					&& !(event->state & GDK_SHIFT_MASK))) {
 					sctree->dnd_select_pending = TRUE;
 					sctree->dnd_select_pending_state = event->state;
 					sctree->dnd_select_pending_row = row;
 				} else {
 					select_row (sctree, row, col, event->state, NULL);
 				}
 			} else {
 				gtk_cmclist_unselect_all (clist);
 			}
 
 			retval = TRUE;
 		} else if (event->button == 3) {
 			/* Emit *_popup_menu signal*/
 			if (on_row) {
 				if (!row_is_selected(sctree,row))
 					select_row (sctree, row, col, 0, NULL);
 				g_signal_emit (G_OBJECT (sctree),
 						 sctree_signals[ROW_POPUP_MENU],
 						 0, event);
 			} else {
 				gtk_cmclist_unselect_all(clist);
 				g_signal_emit (G_OBJECT (sctree),
 						 sctree_signals[EMPTY_POPUP_MENU],
 						 0, event);
 			}
 			retval = TRUE;
 		}
 
 		break;
 
 	case GDK_2BUTTON_PRESS:
 		if (event->button != 1)
 			break;
 
 		sctree->dnd_select_pending = FALSE;
 		sctree->dnd_select_pending_state = 0;
 
 		if (on_row)
 			g_signal_emit (G_OBJECT (sctree),
 				       sctree_signals[OPEN_ROW], 0);
 
 		retval = TRUE;
 		break;
 
 	default:
 		break;
 	}
 
 	return retval;
 }
 
 /* Our handler for button_release events.  We override all of GtkCMCList's broken
  * behavior.
  */
 static gint
 gtk_sctree_button_release (GtkWidget *widget, GdkEventButton *event)
 {
 	GtkSCTree *sctree;
 	GtkCMCList *clist;
 	gint on_row;
 	gint row, col;
 	gint retval;
 
 	cm_return_val_if_fail (widget != NULL, FALSE);
 	cm_return_val_if_fail (GTK_IS_SCTREE (widget), FALSE);
 	cm_return_val_if_fail (event != NULL, FALSE);
 
 	sctree = GTK_SCTREE (widget);
 	clist = GTK_CMCLIST (widget);
 	retval = FALSE;
 
 	if (event->window != clist->clist_window)
 		return (* GTK_WIDGET_CLASS (parent_class)->button_release_event) (widget, event);
 
 	on_row = gtk_cmclist_get_selection_info (clist, event->x, event->y, &row, &col);
 
 	if (!(event->button == 1 || event->button == 2))
 		return FALSE;
 
 	sctree->dnd_press_button = 0;
 	sctree->dnd_press_x = 0;
 	sctree->dnd_press_y = 0;
 
 	if (on_row) {
 		if (sctree->dnd_select_pending) {
 			select_row (sctree, row, col, sctree->dnd_select_pending_state, NULL);
 			sctree->dnd_select_pending = FALSE;
 			sctree->dnd_select_pending_state = 0;
 		}
 
 		retval = TRUE;
 	}
 
 	return retval;
 }
 
 /* Our handler for motion_notify events.  We override all of GtkCMCList's broken
  * behavior.
  */
 static gint
 gtk_sctree_motion (GtkWidget *widget, GdkEventMotion *event)
 {
 	GtkSCTree *sctree;
 	GtkCMCList *clist;
 
 	cm_return_val_if_fail (widget != NULL, FALSE);
 	cm_return_val_if_fail (GTK_IS_SCTREE (widget), FALSE);
 	cm_return_val_if_fail (event != NULL, FALSE);
 
 	sctree = GTK_SCTREE (widget);
 	clist = GTK_CMCLIST (widget);
 
 	if (event->window != clist->clist_window)
 		return (* GTK_WIDGET_CLASS (parent_class)->motion_notify_event) (widget, event);
 
 	if (!((sctree->dnd_press_button == 1 && (event->state & GDK_BUTTON1_MASK))
 	      || (sctree->dnd_press_button == 2 && (event->state & GDK_BUTTON2_MASK))))
 		return FALSE;
 
 	/* This is the same threshold value that is used in gtkdnd.c */
 	int threshold = 3;
 	if (MAX (ABS (sctree->dnd_press_x - event->x),
 		 ABS (sctree->dnd_press_y - event->y)) <= threshold)
 		return FALSE;
 
 	/* Handle any pending selections */
 
 	if (sctree->dnd_select_pending) {
 		if (!row_is_selected(sctree,sctree->dnd_select_pending_row))
 			select_row (sctree,
 				    sctree->dnd_select_pending_row,
 				    -1,
 				    sctree->dnd_select_pending_state,
 				    NULL);
 
 		sctree->dnd_select_pending = FALSE;
 		sctree->dnd_select_pending_state = 0;
 	}
 
 	g_signal_emit (G_OBJECT (sctree),
 		       sctree_signals[START_DRAG],
 		       0,
 		       sctree->dnd_press_button,
 		       event);
 	return TRUE;
 }
 
 /* We override the drag_begin signal to do nothing */
 static void
 gtk_sctree_drag_begin (GtkWidget *widget, GdkDragContext *context)
 {
 	/* nothing */
 }
 
 /* We override the drag_end signal to do nothing */
 static void
 gtk_sctree_drag_end (GtkWidget *widget, GdkDragContext *context)
 {
 	/* nothing */
 }
 
 /* We override the drag_data_get signal to do nothing */
 static void
 gtk_sctree_drag_data_get (GtkWidget *widget, GdkDragContext *context,
 				     GtkSelectionData *data, guint info, guint time)
 {
 	/* nothing */
 }
 
 /* We override the drag_leave signal to do nothing */
 static void
 gtk_sctree_drag_leave (GtkWidget *widget, GdkDragContext *context, guint time)
 {
 	/* nothing */
 }
 
 /* We override the drag_motion signal to do nothing */
 static gboolean
 gtk_sctree_drag_motion (GtkWidget *widget, GdkDragContext *context,
 				   gint x, gint y, guint time)
 {
 	return FALSE;
 }
 
 /* We override the drag_drop signal to do nothing */
 static gboolean
 gtk_sctree_drag_drop (GtkWidget *widget, GdkDragContext *context,
 				 gint x, gint y, guint time)
 {
 	return FALSE;
 }
 
 /* We override the drag_data_received signal to do nothing */
 static void
 gtk_sctree_drag_data_received (GtkWidget *widget, GdkDragContext *context,
 					  gint x, gint y, GtkSelectionData *data,
 					  guint info, guint time)
 {
 	/* nothing */
 }
 
 /* Our handler for the clear signal of the clist.  We have to reset the anchor
  * to null.
  */
 static void
 gtk_sctree_clear (GtkCMCList *clist)
 {
 	GtkSCTree *sctree;
 
 	cm_return_if_fail (clist != NULL);
 	cm_return_if_fail (GTK_IS_SCTREE (clist));
 
 	sctree = GTK_SCTREE (clist);
 	sctree->anchor_row = NULL;
 
 	if (((GtkCMCListClass *)parent_class)->clear)
 		(* ((GtkCMCListClass *)parent_class)->clear) (clist);
 }
 
 static void
 gtk_sctree_real_unselect_all (GtkCMCList *clist)
 {
 	GtkSCTree *sctree;
 	gboolean should_freeze = FALSE;
 
 	cm_return_if_fail (clist != NULL);
 	cm_return_if_fail (GTK_IS_SCTREE (clist));
 
 	sctree = GTK_SCTREE (clist);
 
 	if (sc_g_list_bigger(GTK_CMCLIST(sctree)->selection, 10)) {
 		should_freeze = TRUE;
 		sctree->selecting_range++;
 		gtk_cmclist_freeze (GTK_CMCLIST (sctree));
 	}
 
 	if (((GtkCMCListClass *)parent_class)->unselect_all)
 		(* ((GtkCMCListClass *)parent_class)->unselect_all) (clist);
 
 	if (should_freeze) {
 		gtk_cmclist_thaw (GTK_CMCLIST (sctree));
 		sctree->selecting_range--;
 	}
 }
 
 static void
 gtk_sctree_column_auto_resize (GtkCMCList    *clist,
 		    GtkCMCListRow *clist_row,
 		    gint         column,
 		    gint         old_width)
 {
   /* resize column if needed for auto_resize */
   GtkRequisition requisition;
 
   if (!clist->column[column].auto_resize ||
       GTK_CMCLIST_AUTO_RESIZE_BLOCKED (clist))
     return;
 
   if (clist_row)
     GTK_CMCLIST_GET_CLASS (clist)->cell_size_request (clist, clist_row,
 						   column, &requisition);
   else
     requisition.width = 0;
 
   if (requisition.width > clist->column[column].width)
     gtk_cmclist_set_column_width (clist, column, requisition.width);
   else if (requisition.width < old_width &&
 	   old_width == clist->column[column].width)
     {
       GList *list;
       GtkRequisition button_req;
       gint new_width;
 
       /* run a "gtk_cmclist_optimal_column_width" but break, if
        * the column doesn't shrink */
       if (GTK_CMCLIST_SHOW_TITLES (clist) && clist->column[column].button)
         {
 	gtk_widget_get_requisition (clist->column[column].button, &button_req);
 	new_width = (button_req.width -
 		     (CELL_SPACING + (2 * COLUMN_INSET)));
         }
       else
 	new_width = 0;
 
       for (list = clist->row_list; list; list = list->next)
 	{
 	  GTK_CMCLIST_GET_CLASS (clist)->cell_size_request
 	    (clist, GTK_CMCLIST_ROW (list), column, &requisition);
 	  new_width = MAX (new_width, requisition.width);
 	  if (new_width == clist->column[column].width)
 	    break;
 	}
       if (new_width < clist->column[column].width)
 	gtk_cmclist_set_column_width (clist, column, new_width);
     }
 }
 
 static void
 gtk_sctree_auto_resize_columns (GtkCMCList *clist)
 {
   gint i;
 
   if (GTK_CMCLIST_AUTO_RESIZE_BLOCKED (clist))
     return;
 
   for (i = 0; i < clist->columns; i++)
     gtk_sctree_column_auto_resize (clist, NULL, i, clist->column[i].width);
 }
 
 static void
 gtk_sctree_real_tree_collapse (GtkCMCTree     *ctree,
 		    GtkCMCTreeNode *node)
 {
   GtkCMCList *clist;
   GtkCMCTreeNode *work;
   GtkRequisition requisition;
   gboolean visible;
   gint level;
 
   cm_return_if_fail (GTK_IS_CMCTREE (ctree));
 
   if (!node || !GTK_CMCTREE_ROW (node)->expanded ||
       GTK_CMCTREE_ROW (node)->is_leaf)
     return;
 
   clist = GTK_CMCLIST (ctree);
 
   GTK_CMCLIST_GET_CLASS (clist)->resync_selection (clist, NULL);
 
   GTK_CMCTREE_ROW (node)->expanded = FALSE;
   level = GTK_CMCTREE_ROW (node)->level;
 
   visible = gtk_cmctree_is_viewable (ctree, node);
   /* get cell width if tree_column is auto resized */
   if (visible && clist->column[ctree->tree_column].auto_resize &&
       !GTK_CMCLIST_AUTO_RESIZE_BLOCKED (clist))
     GTK_CMCLIST_GET_CLASS (clist)->cell_size_request
       (clist, &GTK_CMCTREE_ROW (node)->row, ctree->tree_column, &requisition);
 
   /* unref/unset opened pixbuf */
   if (GTK_CMCELL_PIXTEXT
       (GTK_CMCTREE_ROW (node)->row.cell[ctree->tree_column])->pixbuf)
     {
       g_object_unref
 	(GTK_CMCELL_PIXTEXT
 	 (GTK_CMCTREE_ROW (node)->row.cell[ctree->tree_column])->pixbuf);
 
       GTK_CMCELL_PIXTEXT
 	(GTK_CMCTREE_ROW (node)->row.cell[ctree->tree_column])->pixbuf = NULL;
     }
 
   /* set/ref closed pixbuf */
   if (GTK_CMCTREE_ROW (node)->pixbuf_closed)
     {
       GTK_CMCELL_PIXTEXT
 	(GTK_CMCTREE_ROW (node)->row.cell[ctree->tree_column])->pixbuf =
 	g_object_ref (GTK_CMCTREE_ROW (node)->pixbuf_closed);
     }
 
   work = GTK_CMCTREE_ROW (node)->children;
   if (work)
     {
       gint tmp = 0;
       gint row;
       GList *list;
 
       while (work && GTK_CMCTREE_ROW (work)->level > level)
 	{
 	  work = GTK_CMCTREE_NODE_NEXT (work);
 	  tmp++;
 	}
 
       if (work)
 	{
 	  list = (GList *)node;
 	  list->next = (GList *)work;
 	  list = (GList *)GTK_CMCTREE_NODE_PREV (work);
 	  list->next = NULL;
 	  list = (GList *)work;
 	  list->prev = (GList *)node;
 	}
       else
 	{
 	  list = (GList *)node;
 	  list->next = NULL;
 	  clist->row_list_end = (GList *)node;
 	}
 
       if (visible)
 	{
 	  /* resize auto_resize columns if needed */
 	  gtk_sctree_auto_resize_columns (clist);
 
 	  if (!GTK_SCTREE(clist)->sorting) {
 		  row = g_list_position (clist->row_list, (GList *)node);
 		  if (row < clist->focus_row)
 		    clist->focus_row -= tmp;
 	  }
 	  clist->rows -= tmp;
 	  CLIST_REFRESH (clist);
 	}
     }
   else if (visible && clist->column[ctree->tree_column].auto_resize &&
 	   !GTK_CMCLIST_AUTO_RESIZE_BLOCKED (clist))
     /* resize tree_column if needed */
     gtk_sctree_column_auto_resize (clist, &GTK_CMCTREE_ROW (node)->row, ctree->tree_column,
 			requisition.width);
 
 }
 
 
 GtkWidget *gtk_sctree_new_with_titles (gint columns, gint tree_column,
 				       gchar *titles[])
 {
 	GtkWidget *widget;
 
 	cm_return_val_if_fail (columns > 0, NULL);
 	cm_return_val_if_fail (tree_column >= 0, NULL);
 
 	if (tree_column >= columns) {
 		g_warning("wrong tree column");
 		tree_column = 0;
 	}
 
 	widget = gtk_widget_new (TYPE_GTK_SCTREE,
 				 "n_columns", columns,
 				 "tree_column", tree_column,
 				 NULL);
 	if (titles) {
 		GtkCMCList *clist = GTK_CMCLIST (widget);
 		guint i;
 
 		for (i = 0; i < columns; i++)
 			gtk_cmclist_set_column_title (clist, i, titles[i]);
 		gtk_cmclist_column_titles_show (clist);
 	}
 
 	GTK_SCTREE(widget)->show_stripes = TRUE;
 	GTK_SCTREE(widget)->always_expand_recursively = TRUE;
 	GTK_SCTREE(widget)->force_additive_sel = FALSE;
 
 	GTK_SCTREE(widget)->use_markup = g_new0(gboolean, columns);
 
 	return widget;
 }
 
 void gtk_sctree_set_use_markup		    (GtkSCTree		*sctree,
 					     int		 column,
 					     gboolean		 markup)
 {
 	gint columns = 0;
 	GValue value = { 0 };
 
 	cm_return_if_fail(GTK_IS_SCTREE(sctree));
 
 	g_value_init (&value, G_TYPE_INT);
 	g_object_get_property (G_OBJECT (sctree), "n-columns", &value);
 	columns = g_value_get_int (&value);
 	g_value_unset (&value);
 
 	cm_return_if_fail(column < columns);
 
 	sctree->use_markup[column] = markup;
 }
 
 void gtk_sctree_select (GtkSCTree *sctree, GtkCMCTreeNode *node)
 {
 	select_row(sctree,
 		   g_list_position(GTK_CMCLIST(sctree)->row_list, (GList *)node),
 		   -1, 0, node);
 }
 
 void gtk_sctree_select_with_state (GtkSCTree *sctree, GtkCMCTreeNode *node, int state)
 {
 	select_row(sctree,
 		   g_list_position(GTK_CMCLIST(sctree)->row_list, (GList *)node),
 		   -1, state, node);
 }
 
 void gtk_sctree_unselect_all (GtkSCTree *sctree)
 {
 	gtk_cmclist_unselect_all(GTK_CMCLIST(sctree));
 	sctree->anchor_row = NULL;
 }
 
 void gtk_sctree_set_anchor_row (GtkSCTree *sctree, GtkCMCTreeNode *node)
 {
 	sctree->anchor_row = node;
 }
 
 void gtk_sctree_remove_node (GtkSCTree *sctree, GtkCMCTreeNode *node)
 {
 	if (sctree->anchor_row == node)
 		sctree->anchor_row = NULL;
 	gtk_cmctree_remove_node(GTK_CMCTREE(sctree), node);
 }
 
 void gtk_sctree_set_stripes(GtkSCTree  *sctree, gboolean show_stripes)
 {
 	sctree->show_stripes = show_stripes;
 }
 
 void gtk_sctree_set_recursive_expand(GtkSCTree  *sctree, gboolean rec_exp)
 {
 	sctree->always_expand_recursively = rec_exp;
 }
 
 /***********************************************************
  *             Tree sorting functions                      *
  ***********************************************************/
 
 static void sink(GtkCMCList *clist, GPtrArray *numbers, gint root, gint bottom)
 {
 	gint j, k ;
 	GtkCMCTreeNode *temp;
 
 	j = 2 * root;
 	k = j + 1;
 
 	/* find the maximum element of numbers[root],
 	   numbers[2*root] and numbers[2*root+1] */
 	if (j <= bottom) {
 		if (clist->compare( clist, GTK_CMCTREE_ROW (g_ptr_array_index(numbers, root)),
 				    GTK_CMCTREE_ROW(g_ptr_array_index( numbers, j))) >= 0)
 			j = root;
 		if (k <= bottom)
 			if (clist->compare( clist, GTK_CMCTREE_ROW (g_ptr_array_index(numbers, k)),
 					    GTK_CMCTREE_ROW (g_ptr_array_index( numbers, j))) > 0)
 				j = k;
 		/* if numbers[root] wasn't the maximum element then
 		   sink again */
 		if (root != j) {
 			temp = g_ptr_array_index( numbers,root);
 			g_ptr_array_index( numbers, root) = g_ptr_array_index( numbers, j);
 			g_ptr_array_index( numbers, j) = temp;
 			sink( clist, numbers, j, bottom);
 		}
 	}
 }
 
 static void heap_sort(GtkCMCList *clist, GPtrArray *numbers, gint array_size)
 {
 	gint i;
 	GtkCMCTreeNode *temp;
 
 	/* build the Heap */
 	for (i = (array_size / 2); i >= 1; i--)
 		sink( clist, numbers, i, array_size);
 	/* output the Heap */
 	for (i = array_size; i >= 2; i--) {
 		temp = g_ptr_array_index( numbers, 1);
 		g_ptr_array_index( numbers, 1) = g_ptr_array_index( numbers, i);
 		g_ptr_array_index( numbers, i) = temp;
 		sink( clist, numbers, 1, i-1);
 	}
 }
 
 static void
 stree_sort (GtkCMCTree    *ctree,
 	   GtkCMCTreeNode *node,
 	   gpointer      data)
 {
 	GtkCMCTreeNode *list_start, *work, *next;
 	GPtrArray *row_array, *viewable_array;
 	GtkCMCList *clist;
 	gint i;
 
 	clist = GTK_CMCLIST (ctree);
 
 	if (node)
 		work = GTK_CMCTREE_ROW (node)->children;
 	else
 		work = GTK_CMCTREE_NODE (clist->row_list);
 
 	row_array = g_ptr_array_new();
 	viewable_array = g_ptr_array_new();
 
 	if (work) {
 		g_ptr_array_add( row_array, NULL);
 		while (work) {
 			/* add all rows to row_array */
 			g_ptr_array_add( row_array, work);
 			if (GTK_CMCTREE_ROW (work)->parent && gtk_cmctree_is_viewable( ctree, work))
 				g_ptr_array_add( viewable_array, GTK_CMCTREE_ROW (work)->parent);
 			next = GTK_CMCTREE_ROW (work)->sibling;
 			gtk_sctree_unlink( ctree, work, FALSE);
 			work = next;
 		}
 
 		heap_sort( clist, row_array, (row_array->len)-1);
 
 		if (node)
 			list_start = GTK_CMCTREE_ROW (node)->children;
 		else
 			list_start = GTK_CMCTREE_NODE (clist->row_list);
 
 		if (clist->sort_type == GTK_SORT_ASCENDING) {
 			for (i=(row_array->len)-1; i>=1; i--) {
 				work = g_ptr_array_index( row_array, i);
 				gtk_sctree_link( ctree, work, node, list_start, FALSE);
 				list_start = work;
 				/* insert work at the beginning of the list */
 			}
 		} else {
 			for (i=1; i<row_array->len; i++) {
 				work = g_ptr_array_index( row_array, i);
 				gtk_sctree_link( ctree, work, node, list_start, FALSE);
 				list_start = work;
 				/* insert work at the beginning of the list */
 			}
 		}
 
 		for (i=0; i<viewable_array->len; i++) {
 			gtk_cmctree_expand( ctree, g_ptr_array_index( viewable_array, i));
 		}
 
 	}
 	g_ptr_array_free( row_array, TRUE);
 	g_ptr_array_free( viewable_array, TRUE);
 }
 
 void
 gtk_sctree_sort_recursive (GtkCMCTree     *ctree,
 			  GtkCMCTreeNode *node)
 {
 	GtkCMCList *clist;
 	GtkCMCTreeNode *focus_node = NULL;
 
 	cm_return_if_fail (ctree != NULL);
 	cm_return_if_fail (GTK_IS_CMCTREE (ctree));
 
 	clist = GTK_CMCLIST (ctree);
 
 	gtk_cmclist_freeze (clist);
 
 	if (clist->selection_mode == GTK_SELECTION_MULTIPLE) {
 		GTK_CMCLIST_GET_CLASS (clist)->resync_selection (clist, NULL);
 
 		g_list_free (clist->undo_selection);
 		g_list_free (clist->undo_unselection);
 		clist->undo_selection = NULL;
 		clist->undo_unselection = NULL;
 	}
 
 	if (!node || (node && gtk_cmctree_is_viewable (ctree, node)))
 		focus_node = GTK_CMCTREE_NODE (g_list_nth (clist->row_list, clist->focus_row));
 
 	GTK_SCTREE(ctree)->sorting = TRUE;
 
 	gtk_cmctree_post_recursive (ctree, node, GTK_CMCTREE_FUNC (stree_sort), NULL);
 
 	if (!node)
 		stree_sort (ctree, NULL, NULL);
 
 	GTK_SCTREE(ctree)->sorting = FALSE;
 
 	if (focus_node) {
 		clist->focus_row = g_list_position (clist->row_list,(GList *)focus_node);
 		clist->undo_anchor = clist->focus_row;
 	}
 
 	gtk_cmclist_thaw (clist);
 }
 
 void
 gtk_sctree_sort_node (GtkCMCTree     *ctree,
 		     GtkCMCTreeNode *node)
 {
 	GtkCMCList *clist;
 	GtkCMCTreeNode *focus_node = NULL;
 
 	cm_return_if_fail (ctree != NULL);
 	cm_return_if_fail (GTK_IS_CMCTREE (ctree));
 
 	clist = GTK_CMCLIST (ctree);
 
 	gtk_cmclist_freeze (clist);
 
 	if (clist->selection_mode == GTK_SELECTION_MULTIPLE) {
 		GTK_CMCLIST_GET_CLASS (clist)->resync_selection (clist, NULL);
 
 		g_list_free (clist->undo_selection);
 		g_list_free (clist->undo_unselection);
 		clist->undo_selection = NULL;
 		clist->undo_unselection = NULL;
 	}
 
 	if (!node || (node && gtk_cmctree_is_viewable (ctree, node)))
 		focus_node = GTK_CMCTREE_NODE (g_list_nth (clist->row_list, clist->focus_row));
 
 	GTK_SCTREE(ctree)->sorting = TRUE;
 
 	stree_sort (ctree, node, NULL);
 
 	GTK_SCTREE(ctree)->sorting = FALSE;
 
 	if (focus_node) {
 		clist->focus_row = g_list_position (clist->row_list,(GList *)focus_node);
 		clist->undo_anchor = clist->focus_row;
 	}
 
 	gtk_cmclist_thaw (clist);
 }
 
 /************************************************************************/
 
 static void
 gtk_sctree_unlink (GtkCMCTree     *ctree,
 		  GtkCMCTreeNode *node,
                   gboolean      update_focus_row)
 {
 	GtkCMCList *clist;
 	gint rows;
 	gint level;
 	gint visible;
 	GtkCMCTreeNode *work;
 	GtkCMCTreeNode *parent;
 	GList *list;
 
 	cm_return_if_fail (ctree != NULL);
 	cm_return_if_fail (GTK_IS_CMCTREE (ctree));
 	cm_return_if_fail (node != NULL);
 
 	clist = GTK_CMCLIST (ctree);
 
 	if (update_focus_row && clist->selection_mode == GTK_SELECTION_MULTIPLE) {
 		GTK_CMCLIST_GET_CLASS (clist)->resync_selection (clist, NULL);
 
 		g_list_free (clist->undo_selection);
 		g_list_free (clist->undo_unselection);
 		clist->undo_selection = NULL;
 		clist->undo_unselection = NULL;
 	}
 
 	visible = gtk_cmctree_is_viewable (ctree, node);
 
 	/* clist->row_list_end unlinked ? */
 	if (visible && (GTK_CMCTREE_NODE_NEXT (node) == NULL ||
 	   (GTK_CMCTREE_ROW (node)->children && gtk_cmctree_is_ancestor (ctree, node,
 	    GTK_CMCTREE_NODE (clist->row_list_end)))))
 		clist->row_list_end = (GList *) (GTK_CMCTREE_NODE_PREV (node));
 
 	/* update list */
 	rows = 0;
 	level = GTK_CMCTREE_ROW (node)->level;
 	work = GTK_CMCTREE_NODE_NEXT (node);
 	while (work && GTK_CMCTREE_ROW (work)->level > level) {
 		work = GTK_CMCTREE_NODE_NEXT (work);
 		rows++;
 	}
 
 	if (visible) {
 		clist->rows -= (rows + 1);
 
 		if (update_focus_row) {
 			gint pos;
 			pos = g_list_position (clist->row_list, (GList *)node);
 			if (pos + rows < clist->focus_row)
 				clist->focus_row -= (rows + 1);
 			else if (pos <= clist->focus_row) {
 				if (!GTK_CMCTREE_ROW (node)->sibling)
 					clist->focus_row = MAX (pos - 1, 0);
 				else
 					clist->focus_row = pos;
 
 				clist->focus_row = MIN (clist->focus_row, clist->rows - 1);
 			}
 			clist->undo_anchor = clist->focus_row;
 		}
 	}
 
 	if (work) {
 		list = (GList *)GTK_CMCTREE_NODE_PREV (work);
 		list->next = NULL;
 		list = (GList *)work;
 		list->prev = (GList *)GTK_CMCTREE_NODE_PREV (node);
 	}
 
 	if (GTK_CMCTREE_NODE_PREV (node) &&
 	    GTK_CMCTREE_NODE_NEXT (GTK_CMCTREE_NODE_PREV (node)) == node) {
 		list = (GList *)GTK_CMCTREE_NODE_PREV (node);
 		list->next = (GList *)work;
 	}
 
 	/* update tree */
 	parent = GTK_CMCTREE_ROW (node)->parent;
 	if (parent) {
 		if (GTK_CMCTREE_ROW (parent)->children == node) {
 			GTK_CMCTREE_ROW (parent)->children = GTK_CMCTREE_ROW (node)->sibling;
 		}
 		else {
 			GtkCMCTreeNode *sibling;
 
 			sibling = GTK_CMCTREE_ROW (parent)->children;
 			while (GTK_CMCTREE_ROW (sibling)->sibling != node)
 				sibling = GTK_CMCTREE_ROW (sibling)->sibling;
 			GTK_CMCTREE_ROW (sibling)->sibling = GTK_CMCTREE_ROW (node)->sibling;
 		}
 	}
 	else {
 		if (clist->row_list == (GList *)node)
 			clist->row_list = (GList *) (GTK_CMCTREE_ROW (node)->sibling);
 		else {
 			GtkCMCTreeNode *sibling;
 
 			sibling = GTK_CMCTREE_NODE (clist->row_list);
 			while (GTK_CMCTREE_ROW (sibling)->sibling != node)
 				sibling = GTK_CMCTREE_ROW (sibling)->sibling;
 			GTK_CMCTREE_ROW (sibling)->sibling = GTK_CMCTREE_ROW (node)->sibling;
 		}
 	}
 }
 
 static void
 gtk_sctree_link (GtkCMCTree     *ctree,
 		GtkCMCTreeNode *node,
 		GtkCMCTreeNode *parent,
 		GtkCMCTreeNode *sibling,
 		gboolean      update_focus_row)
 {
 	GtkCMCList *clist;
 	GList *list_end;
 	GList *list;
 	GList *work;
 	gboolean visible = FALSE;
 	gint rows = 0;
 
 	if (sibling)
 		cm_return_if_fail (GTK_CMCTREE_ROW (sibling)->parent == parent);
 	cm_return_if_fail (node != NULL);
 	cm_return_if_fail (node != sibling);
 	cm_return_if_fail (node != parent);
 
 	clist = GTK_CMCLIST (ctree);
 
 	if (update_focus_row && clist->selection_mode == GTK_SELECTION_MULTIPLE) {
 		GTK_CMCLIST_GET_CLASS (clist)->resync_selection (clist, NULL);
 
 		g_list_free (clist->undo_selection);
 		g_list_free (clist->undo_unselection);
 		clist->undo_selection = NULL;
 		clist->undo_unselection = NULL;
 	}
 
 	for (rows = 1, list_end = (GList *)node; list_end->next;
 	     list_end = list_end->next)
 		rows++;
 
 	GTK_CMCTREE_ROW (node)->parent = parent;
 	GTK_CMCTREE_ROW (node)->sibling = sibling;
 
 	if (!parent || (parent && (gtk_cmctree_is_viewable (ctree, parent) &&
 	    GTK_CMCTREE_ROW (parent)->expanded))) {
 		visible = TRUE;
 		clist->rows += rows;
 	}
 
 	if (parent)
 		work = (GList *)(GTK_CMCTREE_ROW (parent)->children);
 	else
 		work = clist->row_list;
 
 	if (sibling) {
 		if (work != (GList *)sibling) {
 			while (GTK_CMCTREE_ROW (work)->sibling != sibling)
 				work = (GList *)(GTK_CMCTREE_ROW (work)->sibling);
 			GTK_CMCTREE_ROW (work)->sibling = node;
 		}
 
 		if (sibling == GTK_CMCTREE_NODE (clist->row_list))
 		clist->row_list = (GList *) node;
 		if (GTK_CMCTREE_NODE_PREV (sibling) &&
 		    GTK_CMCTREE_NODE_NEXT (GTK_CMCTREE_NODE_PREV (sibling)) == sibling) {
 			list = (GList *)GTK_CMCTREE_NODE_PREV (sibling);
 			list->next = (GList *)node;
 		}
 
 		list = (GList *)node;
 		list->prev = (GList *)GTK_CMCTREE_NODE_PREV (sibling);
 		list_end->next = (GList *)sibling;
 		list = (GList *)sibling;
 		list->prev = list_end;
 		if (parent && GTK_CMCTREE_ROW (parent)->children == sibling)
 			GTK_CMCTREE_ROW (parent)->children = node;
 	}
 	else {
 		if (work) {
 			/* find sibling */
 			while (GTK_CMCTREE_ROW (work)->sibling)
 			work = (GList *)(GTK_CMCTREE_ROW (work)->sibling);
 			GTK_CMCTREE_ROW (work)->sibling = node;
 
 			/* find last visible child of sibling */
 			work = (GList *) gtk_sctree_last_visible (ctree,
 			       GTK_CMCTREE_NODE (work));
 
 			list_end->next = work->next;
 			if (work->next)
 				work->next->prev = list_end;
 			work->next = (GList *)node;
 			list = (GList *)node;
 			list->prev = work;
 		}
 		else {
 			if (parent) {
 				GTK_CMCTREE_ROW (parent)->children = node;
 				list = (GList *)node;
 				list->prev = (GList *)parent;
 				if (GTK_CMCTREE_ROW (parent)->expanded) {
 					list_end->next = (GList *)GTK_CMCTREE_NODE_NEXT (parent);
 					if (GTK_CMCTREE_NODE_NEXT(parent)) {
 						list = (GList *)GTK_CMCTREE_NODE_NEXT (parent);
 						list->prev = list_end;
 					}
 					list = (GList *)parent;
 					list->next = (GList *)node;
 				}
 				else
 					list_end->next = NULL;
 			}
 			else {
 				clist->row_list = (GList *)node;
 				list = (GList *)node;
 				list->prev = NULL;
 				list_end->next = NULL;
 			}
 		}
 	}
 
 	gtk_cmctree_pre_recursive (ctree, node, stree_update_level, NULL);
 
 	if (clist->row_list_end == NULL ||
 	    clist->row_list_end->next == (GList *)node)
 		clist->row_list_end = list_end;
 
 	if (visible && update_focus_row) {
 		gint pos;
 		pos = g_list_position (clist->row_list, (GList *)node);
 
 		if (pos <= clist->focus_row) {
 			clist->focus_row += rows;
 			clist->undo_anchor = clist->focus_row;
 		}
 	}
 }
 
 static void
 stree_update_level (GtkCMCTree     *ctree,
 		   GtkCMCTreeNode *node,
 		   gpointer      data)
 {
 	if (!node)
 		return;
 
 	if (GTK_CMCTREE_ROW (node)->parent)
 		GTK_CMCTREE_ROW (node)->level =
 		GTK_CMCTREE_ROW (GTK_CMCTREE_ROW (node)->parent)->level + 1;
 	else
 		GTK_CMCTREE_ROW (node)->level = 1;
 }
 
 static GtkCMCTreeNode *
 gtk_sctree_last_visible (GtkCMCTree     *ctree,
 			GtkCMCTreeNode *node)
 {
 	GtkCMCTreeNode *work;
 
 	if (!node)
 		return NULL;
 
 	work = GTK_CMCTREE_ROW (node)->children;
 
 	if (!work || !GTK_CMCTREE_ROW (node)->expanded)
 		return node;
 
 	while (GTK_CMCTREE_ROW (work)->sibling)
 		work = GTK_CMCTREE_ROW (work)->sibling;
 
 	return gtk_sctree_last_visible (ctree, work);
 }
 
 static void
 sset_node_info (GtkCMCTree     *ctree,
 	       GtkCMCTreeNode *node,
 	       const gchar  *text,
 	       guint8        spacing,
 	       GdkPixbuf    *pixbuf_closed,
 	       GdkPixbuf    *pixbuf_opened,
 	       gboolean      is_leaf,
 	       gboolean      expanded)
 {
   if (GTK_CMCTREE_ROW (node)->pixbuf_opened)
     {
       g_object_unref (GTK_CMCTREE_ROW (node)->pixbuf_opened);
     }
   if (GTK_CMCTREE_ROW (node)->pixbuf_closed)
     {
       g_object_unref (GTK_CMCTREE_ROW (node)->pixbuf_closed);
     }
 
   GTK_CMCTREE_ROW (node)->pixbuf_opened = NULL;
   GTK_CMCTREE_ROW (node)->pixbuf_closed = NULL;
 
   if (pixbuf_closed)
     {
       GTK_CMCTREE_ROW (node)->pixbuf_closed = g_object_ref (pixbuf_closed);
     }
   if (pixbuf_opened)
     {
       GTK_CMCTREE_ROW (node)->pixbuf_opened = g_object_ref (pixbuf_opened);
     }
 
   GTK_CMCTREE_ROW (node)->is_leaf  = is_leaf;
   GTK_CMCTREE_ROW (node)->expanded = (is_leaf) ? FALSE : expanded;
 
   if (GTK_CMCTREE_ROW (node)->expanded)
     gtk_cmctree_node_set_pixtext (ctree, node, ctree->tree_column,
 				text, spacing, pixbuf_opened);
   else
     gtk_cmctree_node_set_pixtext (ctree, node, ctree->tree_column,
 				text, spacing, pixbuf_closed);
 }
 
 static GtkCMCTreeRow *
 srow_new (GtkCMCTree *ctree)
 {
   GtkCMCList *clist;
   GtkCMCTreeRow *ctree_row;
   int i;
 
   clist = GTK_CMCLIST (ctree);
   ctree_row = g_slice_new (GtkCMCTreeRow);
   ctree_row->row.cell = g_slice_alloc (sizeof (GtkCMCell) * clist->columns);
   for (i = 0; i < clist->columns; i++)
     {
       ctree_row->row.cell[i].type = GTK_CMCELL_EMPTY;
       ctree_row->row.cell[i].vertical = 0;
       ctree_row->row.cell[i].horizontal = 0;
       ctree_row->row.cell[i].style = NULL;
     }
 
   GTK_CMCELL_PIXTEXT (ctree_row->row.cell[ctree->tree_column])->text = NULL;
 
   ctree_row->row.fg_set     = FALSE;
   ctree_row->row.bg_set     = FALSE;
   ctree_row->row.style      = NULL;
   ctree_row->row.selectable = TRUE;
   ctree_row->row.state      = GTK_STATE_NORMAL;
   ctree_row->row.data       = NULL;
   ctree_row->row.destroy    = NULL;
 
   ctree_row->level         = 0;
   ctree_row->expanded      = FALSE;
   ctree_row->parent        = NULL;
   ctree_row->sibling       = NULL;
   ctree_row->children      = NULL;
   ctree_row->pixbuf_closed = NULL;
   ctree_row->pixbuf_opened = NULL;
 
   return ctree_row;
 }
 
 static void
 srow_delete (GtkCMCTree    *ctree,
 	    GtkCMCTreeRow *ctree_row)
 {
   GtkCMCList *clist;
   gint i;
 
   clist = GTK_CMCLIST (ctree);
 
   for (i = 0; i < clist->columns; i++)
     {
       GTK_CMCLIST_GET_CLASS (clist)->set_cell_contents
 	(clist, &(ctree_row->row), i, GTK_CMCELL_EMPTY, NULL, 0, NULL);
       if (ctree_row->row.cell[i].style)
 	{
 	  if (gtk_widget_get_realized (GTK_WIDGET(ctree)))
 	    gtk_style_detach (ctree_row->row.cell[i].style);
 	  g_object_unref (ctree_row->row.cell[i].style);
 	}
     }
 
   if (ctree_row->row.style)
     {
       if (gtk_widget_get_realized (GTK_WIDGET(ctree)))
 	gtk_style_detach (ctree_row->row.style);
       g_object_unref (ctree_row->row.style);
     }
 
   if (ctree_row->pixbuf_closed)
     {
       g_object_unref (ctree_row->pixbuf_closed);
     }
 
   if (ctree_row->pixbuf_opened)
     {
       g_object_unref (ctree_row->pixbuf_opened);
     }
 
   if (ctree_row->row.destroy)
     {
       GDestroyNotify dnotify = ctree_row->row.destroy;
       gpointer ddata = ctree_row->row.data;
 
       ctree_row->row.destroy = NULL;
       ctree_row->row.data = NULL;
 
       dnotify (ddata);
     }
 
   g_slice_free1 (sizeof (GtkCMCell) * clist->columns, ctree_row->row.cell);
   g_slice_free (GtkCMCTreeRow, ctree_row);
 }
 
 static void
 stree_delete_row (GtkCMCTree     *ctree,
 		 GtkCMCTreeNode *node,
 		 gpointer      data)
 {
   srow_delete (ctree, GTK_CMCTREE_ROW (node));
   g_list_free_1 ((GList *)node);
 }
 
 static void
 gtk_sctree_real_tree_expand (GtkCMCTree     *ctree,
 		  GtkCMCTreeNode *node)
 {
   GtkCMCList *clist;
   GtkCMCTreeNode *work;
   GtkRequisition requisition;
   gboolean visible;
 
   cm_return_if_fail (GTK_IS_CMCTREE (ctree));
 
   if (!node || GTK_CMCTREE_ROW (node)->expanded || GTK_CMCTREE_ROW (node)->is_leaf)
     return;
 
   clist = GTK_CMCLIST (ctree);
 
   GTK_CMCLIST_GET_CLASS (clist)->resync_selection (clist, NULL);
 
   GTK_CMCTREE_ROW (node)->expanded = TRUE;
 
   visible = gtk_cmctree_is_viewable (ctree, node);
   /* get cell width if tree_column is auto resized */
   if (visible && clist->column[ctree->tree_column].auto_resize &&
       !GTK_CMCLIST_AUTO_RESIZE_BLOCKED (clist))
     GTK_CMCLIST_GET_CLASS (clist)->cell_size_request
       (clist, &GTK_CMCTREE_ROW (node)->row, ctree->tree_column, &requisition);
 
   /* unref/unset closed pixbuf */
   if (GTK_CMCELL_PIXTEXT
       (GTK_CMCTREE_ROW (node)->row.cell[ctree->tree_column])->pixbuf)
     {
       g_object_unref
 	(GTK_CMCELL_PIXTEXT
 	 (GTK_CMCTREE_ROW (node)->row.cell[ctree->tree_column])->pixbuf);
 
       GTK_CMCELL_PIXTEXT
 	(GTK_CMCTREE_ROW (node)->row.cell[ctree->tree_column])->pixbuf = NULL;
     }
 
   /* set/ref opened pixbuf */
   if (GTK_CMCTREE_ROW (node)->pixbuf_opened)
     {
       GTK_CMCELL_PIXTEXT
 	(GTK_CMCTREE_ROW (node)->row.cell[ctree->tree_column])->pixbuf =
 	g_object_ref (GTK_CMCTREE_ROW (node)->pixbuf_opened);
     }
 
 
   work = GTK_CMCTREE_ROW (node)->children;
   if (work)
     {
       GList *list = (GList *)work;
       gint *cell_width = NULL;
       gint tmp = 0;
       gint row;
       gint i;
 
       if (visible && !GTK_CMCLIST_AUTO_RESIZE_BLOCKED (clist))
 	{
 	  cell_width = g_new0 (gint, clist->columns);
 	  if (clist->column[ctree->tree_column].auto_resize)
 	      cell_width[ctree->tree_column] = requisition.width;
 
 	  while (work)
 	    {
 	      /* search maximum cell widths of auto_resize columns */
 	      for (i = 0; i < clist->columns; i++)
 		if (clist->column[i].auto_resize)
 		  {
 		    GTK_CMCLIST_GET_CLASS (clist)->cell_size_request
 		      (clist, &GTK_CMCTREE_ROW (work)->row, i, &requisition);
 		    cell_width[i] = MAX (requisition.width, cell_width[i]);
 		  }
 
 	      list = (GList *)work;
 	      work = GTK_CMCTREE_NODE_NEXT (work);
 	      tmp++;
 	    }
 	}
       else
 	while (work)
 	  {
 	    list = (GList *)work;
 	    work = GTK_CMCTREE_NODE_NEXT (work);
 	    tmp++;
 	  }
 
       list->next = (GList *)GTK_CMCTREE_NODE_NEXT (node);
 
       if (GTK_CMCTREE_NODE_NEXT (node))
 	{
 	  GList *tmp_list;
 
 	  if (clist->row_list_end == list)
 	      clist->row_list_end = g_list_last(list);
 
 	  tmp_list = (GList *)GTK_CMCTREE_NODE_NEXT (node);
 	  tmp_list->prev = list;
 	}
       else
 	clist->row_list_end = list;
 
       list = (GList *)node;
       list->next = (GList *)(GTK_CMCTREE_ROW (node)->children);
 
       if (visible && !GTK_CMCLIST_AUTO_RESIZE_BLOCKED (clist))
 	{
 	  /* resize auto_resize columns if needed */
 	  for (i = 0; i < clist->columns; i++)
 	    if (clist->column[i].auto_resize &&
 		cell_width[i] > clist->column[i].width)
 	      gtk_cmclist_set_column_width (clist, i, cell_width[i]);
 	  g_free (cell_width);
 
 	  if (!GTK_SCTREE(ctree)->sorting) {
 		  /* update focus_row position */
 		  row = g_list_position (clist->row_list, (GList *)node);
 		  if (row < clist->focus_row)
 		    clist->focus_row += tmp;
 	  }
 	  clist->rows += tmp;
 	  CLIST_REFRESH (clist);
 	}
     }
   else if (visible && clist->column[ctree->tree_column].auto_resize)
     /* resize tree_column if needed */
     gtk_sctree_column_auto_resize (clist, &GTK_CMCTREE_ROW (node)->row, ctree->tree_column,
 			requisition.width);
 
 }
 
 GtkCMCTreeNode *
 gtk_sctree_insert_node (GtkCMCTree     *ctree,
 		       GtkCMCTreeNode *parent,
 		       GtkCMCTreeNode *sibling,
 		       gchar        *text[],
 		       guint8        spacing,
 		       GdkPixbuf    *pixbuf_closed,
 		       GdkPixbuf    *pixbuf_opened,
 		       gboolean      is_leaf,
 		       gboolean      expanded)
 {
   GtkCMCList *clist;
   GtkCMCTreeRow *new_row;
   GtkCMCTreeNode *node;
   GList *list;
   gint i;
 
   cm_return_val_if_fail (GTK_IS_CMCTREE (ctree), NULL);
   if (sibling)
     cm_return_val_if_fail (GTK_CMCTREE_ROW (sibling)->parent == parent, NULL);
 
   if (parent && GTK_CMCTREE_ROW (parent)->is_leaf)
     return NULL;
 
   clist = GTK_CMCLIST (ctree);
 
   /* create the row */
   new_row = srow_new (ctree);
   list = g_list_alloc ();
   list->data = new_row;
   node = GTK_CMCTREE_NODE (list);
 
   if (text)
     for (i = 0; i < clist->columns; i++)
       if (text[i] && i != ctree->tree_column)
 	GTK_CMCLIST_GET_CLASS (clist)->set_cell_contents
 	  (clist, &(new_row->row), i, GTK_CMCELL_TEXT, text[i], 0, NULL);
 
   sset_node_info (ctree, node, text ?
 		 text[ctree->tree_column] : NULL, spacing, pixbuf_closed,
 		 pixbuf_opened, is_leaf, expanded);
 
   /* sorted insertion */
   if (GTK_CMCLIST_AUTO_SORT (clist))
     {
       if (parent)
 	sibling = GTK_CMCTREE_ROW (parent)->children;
       else
 	sibling = GTK_CMCTREE_NODE (clist->row_list);
 
       while (sibling && clist->compare
 	     (clist, GTK_CMCTREE_ROW (node), GTK_CMCTREE_ROW (sibling)) > 0)
 	sibling = GTK_CMCTREE_ROW (sibling)->sibling;
     }
 
   gtk_sctree_link (ctree, node, parent, sibling, FALSE);
 
   if (text && !GTK_CMCLIST_AUTO_RESIZE_BLOCKED (clist) &&
       gtk_cmctree_is_viewable (ctree, node))
     {
       for (i = 0; i < clist->columns; i++)
 	if (clist->column[i].auto_resize)
 	  gtk_sctree_column_auto_resize (clist, &(new_row->row), i, 0);
     }
 
   if (clist->rows == 1)
     {
       clist->focus_row = 0;
       if (clist->selection_mode == GTK_SELECTION_BROWSE)
 	gtk_sctree_select (GTK_SCTREE(ctree), node);
     }
 
 
   CLIST_REFRESH (clist);
 
   return node;
 }
 
 GtkCMCTreeNode *
 gtk_sctree_insert_gnode (GtkCMCTree          *ctree,
 			GtkCMCTreeNode      *parent,
 			GtkCMCTreeNode      *sibling,
 			GNode             *gnode,
 			GtkCMCTreeGNodeFunc  func,
 			gpointer           data)
 {
   GtkCMCList *clist;
   GtkCMCTreeNode *cnode = NULL;
   GtkCMCTreeNode *child = NULL;
   GtkCMCTreeNode *new_child;
   GList *list;
   GNode *work;
   guint depth = 1;
 
   cm_return_val_if_fail (GTK_IS_CMCTREE (ctree), NULL);
   cm_return_val_if_fail (gnode != NULL, NULL);
   cm_return_val_if_fail (func != NULL, NULL);
   if (sibling)
     cm_return_val_if_fail (GTK_CMCTREE_ROW (sibling)->parent == parent, NULL);
 
   clist = GTK_CMCLIST (ctree);
 
   if (parent)
     depth = GTK_CMCTREE_ROW (parent)->level + 1;
 
   list = g_list_alloc ();
   list->data = srow_new (ctree);
   cnode = GTK_CMCTREE_NODE (list);
 
   gtk_cmclist_freeze (clist);
 
   sset_node_info (ctree, cnode, "", 0, NULL, NULL, TRUE, FALSE);
 
   if (!func (ctree, depth, gnode, cnode, data))
     {
       stree_delete_row (ctree, cnode, NULL);
       gtk_cmclist_thaw (clist);
       return NULL;
     }
 
   if (GTK_CMCLIST_AUTO_SORT (clist))
     {
       if (parent)
 	sibling = GTK_CMCTREE_ROW (parent)->children;
       else
 	sibling = GTK_CMCTREE_NODE (clist->row_list);
 
       while (sibling && clist->compare
 	     (clist, GTK_CMCTREE_ROW (cnode), GTK_CMCTREE_ROW (sibling)) > 0)
 	sibling = GTK_CMCTREE_ROW (sibling)->sibling;
     }
 
   gtk_sctree_link (ctree, cnode, parent, sibling, FALSE);
 
   for (work = g_node_last_child (gnode); work; work = work->prev)
     {
       new_child = gtk_sctree_insert_gnode (ctree, cnode, child,
 					  work, func, data);
       if (new_child)
 	child = new_child;
     }
 
   gtk_cmclist_thaw (clist);
 
   return cnode;
 }
 
 static void
 sreal_tree_move (GtkCMCTree     *ctree,
 		GtkCMCTreeNode *node,
 		GtkCMCTreeNode *new_parent,
 		GtkCMCTreeNode *new_sibling)
 {
   GtkCMCList *clist;
   GtkCMCTreeNode *work;
   gboolean visible = FALSE;
 
   cm_return_if_fail (ctree != NULL);
   cm_return_if_fail (node != NULL);
   cm_return_if_fail (!new_sibling ||
 		    GTK_CMCTREE_ROW (new_sibling)->parent == new_parent);
 
   if (new_parent && GTK_CMCTREE_ROW (new_parent)->is_leaf)
     return;
 
   /* new_parent != child of child */
   for (work = new_parent; work; work = GTK_CMCTREE_ROW (work)->parent)
     if (work == node)
       return;
 
   clist = GTK_CMCLIST (ctree);
 
   visible = gtk_cmctree_is_viewable (ctree, node);
 
   if (clist->selection_mode == GTK_SELECTION_MULTIPLE)
     {
       GTK_CMCLIST_GET_CLASS (clist)->resync_selection (clist, NULL);
 
       g_list_free (clist->undo_selection);
       g_list_free (clist->undo_unselection);
       clist->undo_selection = NULL;
       clist->undo_unselection = NULL;
     }
 
   if (GTK_CMCLIST_AUTO_SORT (clist))
     {
       if (new_parent == GTK_CMCTREE_ROW (node)->parent)
 	return;
 
       if (new_parent)
 	new_sibling = GTK_CMCTREE_ROW (new_parent)->children;
       else
 	new_sibling = GTK_CMCTREE_NODE (clist->row_list);
 
       while (new_sibling && clist->compare
 	     (clist, GTK_CMCTREE_ROW (node), GTK_CMCTREE_ROW (new_sibling)) > 0)
 	new_sibling = GTK_CMCTREE_ROW (new_sibling)->sibling;
     }
 
   if (new_parent == GTK_CMCTREE_ROW (node)->parent &&
       new_sibling == GTK_CMCTREE_ROW (node)->sibling)
     return;
 
   gtk_cmclist_freeze (clist);
 
   work = NULL;
 
   if (!GTK_SCTREE(ctree)->sorting && gtk_cmctree_is_viewable (ctree, node))
     work = GTK_CMCTREE_NODE (g_list_nth (clist->row_list, clist->focus_row));
 
   gtk_sctree_unlink (ctree, node, FALSE);
   gtk_sctree_link (ctree, node, new_parent, new_sibling, FALSE);
 
   if (!GTK_SCTREE(ctree)->sorting && work)
     {
       while (work &&  !gtk_cmctree_is_viewable (ctree, work))
 	work = GTK_CMCTREE_ROW (work)->parent;
       clist->focus_row = g_list_position (clist->row_list, (GList *)work);
       clist->undo_anchor = clist->focus_row;
     }
 
   if (clist->column[ctree->tree_column].auto_resize &&
       !GTK_CMCLIST_AUTO_RESIZE_BLOCKED (clist) &&
       (visible || gtk_cmctree_is_viewable (ctree, node)))
     gtk_cmclist_set_column_width
       (clist, ctree->tree_column,
        gtk_cmclist_optimal_column_width (clist, ctree->tree_column));
 
   gtk_cmclist_thaw (clist);
 }
 
 void gtk_sctree_set_column_tooltip	    (GtkSCTree		*sctree,
 					     int		 column,
 					     const gchar 	*tip)
 {
 	CLAWS_SET_TIP(GTK_CMCLIST(sctree)->column[column].button,
 			tip);
 }