new function to set/unset the selectable flag of a single row.

* gtk/gtkclist.c (gtk_clist_set_selectable): new function
  to set/unset the selectable flag of a single row.
  (gtk_clist_get_selectable): new function
  to get the state of the selectable flag

* gtk/gtkctree.c (gtk_ctree_node_set_selectable)
  (gtk_ctree_node_get_selectable): clist analogons

ChangeLog

@@ -1,3 +1,13 @@
+Fri Sep 11 15:25:10 1998  Lars Hamann  <lars@gtk.org>
+
+	* gtk/gtkclist.c (gtk_clist_set_selectable): new function
+	to set/unset the selectable flag of a single row.
+	(gtk_clist_get_selectable): new function 
+	to get the state of the selectable flag
+
+	* gtk/gtkctree.c (gtk_ctree_node_set_selectable)
+	(gtk_ctree_node_get_selectable): clist analogons
+	
 Thu Sep 10 17:04:03 1998  Raph Levien  <raph@gimp.org>
 
 	* gtk/testrgb.c (testrgb_rgb_test): Small changes to the test

ChangeLog.pre-2-0

@@ -1,3 +1,13 @@
+Fri Sep 11 15:25:10 1998  Lars Hamann  <lars@gtk.org>
+
+	* gtk/gtkclist.c (gtk_clist_set_selectable): new function
+	to set/unset the selectable flag of a single row.
+	(gtk_clist_get_selectable): new function 
+	to get the state of the selectable flag
+
+	* gtk/gtkctree.c (gtk_ctree_node_set_selectable)
+	(gtk_ctree_node_get_selectable): clist analogons
+	
 Thu Sep 10 17:04:03 1998  Raph Levien  <raph@gimp.org>
 
 	* gtk/testrgb.c (testrgb_rgb_test): Small changes to the test

ChangeLog.pre-2-10

@@ -1,3 +1,13 @@
+Fri Sep 11 15:25:10 1998  Lars Hamann  <lars@gtk.org>
+
+	* gtk/gtkclist.c (gtk_clist_set_selectable): new function
+	to set/unset the selectable flag of a single row.
+	(gtk_clist_get_selectable): new function 
+	to get the state of the selectable flag
+
+	* gtk/gtkctree.c (gtk_ctree_node_set_selectable)
+	(gtk_ctree_node_get_selectable): clist analogons
+	
 Thu Sep 10 17:04:03 1998  Raph Levien  <raph@gimp.org>
 
 	* gtk/testrgb.c (testrgb_rgb_test): Small changes to the test

ChangeLog.pre-2-2

@@ -1,3 +1,13 @@
+Fri Sep 11 15:25:10 1998  Lars Hamann  <lars@gtk.org>
+
+	* gtk/gtkclist.c (gtk_clist_set_selectable): new function
+	to set/unset the selectable flag of a single row.
+	(gtk_clist_get_selectable): new function 
+	to get the state of the selectable flag
+
+	* gtk/gtkctree.c (gtk_ctree_node_set_selectable)
+	(gtk_ctree_node_get_selectable): clist analogons
+	
 Thu Sep 10 17:04:03 1998  Raph Levien  <raph@gimp.org>
 
 	* gtk/testrgb.c (testrgb_rgb_test): Small changes to the test

ChangeLog.pre-2-4

@@ -1,3 +1,13 @@
+Fri Sep 11 15:25:10 1998  Lars Hamann  <lars@gtk.org>
+
+	* gtk/gtkclist.c (gtk_clist_set_selectable): new function
+	to set/unset the selectable flag of a single row.
+	(gtk_clist_get_selectable): new function 
+	to get the state of the selectable flag
+
+	* gtk/gtkctree.c (gtk_ctree_node_set_selectable)
+	(gtk_ctree_node_get_selectable): clist analogons
+	
 Thu Sep 10 17:04:03 1998  Raph Levien  <raph@gimp.org>
 
 	* gtk/testrgb.c (testrgb_rgb_test): Small changes to the test

ChangeLog.pre-2-6

@@ -1,3 +1,13 @@
+Fri Sep 11 15:25:10 1998  Lars Hamann  <lars@gtk.org>
+
+	* gtk/gtkclist.c (gtk_clist_set_selectable): new function
+	to set/unset the selectable flag of a single row.
+	(gtk_clist_get_selectable): new function 
+	to get the state of the selectable flag
+
+	* gtk/gtkctree.c (gtk_ctree_node_set_selectable)
+	(gtk_ctree_node_get_selectable): clist analogons
+	
 Thu Sep 10 17:04:03 1998  Raph Levien  <raph@gimp.org>
 
 	* gtk/testrgb.c (testrgb_rgb_test): Small changes to the test

ChangeLog.pre-2-8

@@ -1,3 +1,13 @@
+Fri Sep 11 15:25:10 1998  Lars Hamann  <lars@gtk.org>
+
+	* gtk/gtkclist.c (gtk_clist_set_selectable): new function
+	to set/unset the selectable flag of a single row.
+	(gtk_clist_get_selectable): new function 
+	to get the state of the selectable flag
+
+	* gtk/gtkctree.c (gtk_ctree_node_set_selectable)
+	(gtk_ctree_node_get_selectable): clist analogons
+	
 Thu Sep 10 17:04:03 1998  Raph Levien  <raph@gimp.org>
 
 	* gtk/testrgb.c (testrgb_rgb_test): Small changes to the test

gtk/gtkclist.c

@@ -1624,6 +1624,66 @@ gtk_clist_set_shift (GtkCList * clist,
     GTK_CLIST_CLASS_FW (clist)->draw_row (clist, NULL, row, clist_row);
 }
 
+void
+gtk_clist_set_selectable (GtkCList    *clist,
+			  gint         row,
+			  gboolean     selectable)
+{
+  GtkCListRow *clist_row;
+
+  g_return_if_fail (clist != NULL);
+  g_return_if_fail (GTK_IS_CLIST (clist));
+
+  if (row < 0 || row >= clist->rows)
+    return;
+
+  clist_row = (g_list_nth (clist->row_list, row))->data;
+
+  if (selectable == clist_row->selectable)
+    return;
+
+  clist_row->selectable = selectable;
+
+  if (!selectable && clist_row->state == GTK_STATE_SELECTED)
+    {
+      if (clist->anchor >= 0 &&
+	  clist->selection_mode == GTK_SELECTION_EXTENDED)
+	{
+	  if ((gdk_pointer_is_grabbed () && GTK_WIDGET_HAS_FOCUS (clist)))
+	    {
+	      GTK_CLIST_UNSET_FLAG (clist, CLIST_DRAG_SELECTION);
+	      gtk_grab_remove (GTK_WIDGET (clist));
+	      gdk_pointer_ungrab (GDK_CURRENT_TIME);
+	      if (clist->htimer)
+		{
+		  gtk_timeout_remove (clist->htimer);
+		  clist->htimer = 0;
+		}
+	      if (clist->vtimer)
+		{
+		  gtk_timeout_remove (clist->vtimer);
+		  clist->vtimer = 0;
+		}
+	    }
+	  GTK_CLIST_CLASS_FW (clist)->resync_selection (clist, NULL);
+	}
+      unselect_row (clist, row, -1, NULL);
+    }      
+}
+
+gboolean
+gtk_clist_get_selectable (GtkCList *clist,
+			  gint      row)
+{
+  g_return_val_if_fail (clist != NULL, FALSE);
+  g_return_val_if_fail (GTK_IS_CLIST (clist), FALSE);
+
+  if (row < 0 || row >= clist->rows)
+    return FALSE;
+
+  return GTK_CLIST_ROW (g_list_nth (clist->row_list, row))->selectable;
+}
+
 gint
 gtk_clist_append (GtkCList * clist,
 		  gchar * text[])
@@ -4010,7 +4070,7 @@ real_select_row (GtkCList * clist,
 
   clist_row = (g_list_nth (clist->row_list, row))->data;
 
-  if (clist_row->state != GTK_STATE_NORMAL)
+  if (clist_row->state != GTK_STATE_NORMAL || !clist_row->selectable)
     return;
 
   clist_row->state = GTK_STATE_SELECTED;
@@ -4716,6 +4776,7 @@ row_new (GtkCList * clist)
 
   clist_row->fg_set = FALSE;
   clist_row->bg_set = FALSE;
+  clist_row->selectable = TRUE;
   clist_row->state = GTK_STATE_NORMAL;
   clist_row->data = NULL;
   clist_row->destroy = NULL;
@@ -4901,7 +4962,15 @@ gtk_clist_focus_in (GtkWidget     *widget,
 
   if (clist->selection_mode == GTK_SELECTION_BROWSE &&
       clist->selection == NULL && clist->focus_row > -1)
-    select_row (clist, clist->focus_row, -1, (GdkEvent *) event);
+    {
+      GList *list;
+
+      list = g_list_nth (clist->row_list, clist->focus_row);
+      if (list && GTK_CLIST_ROW (list)->selectable)
+	select_row (clist, clist->focus_row, -1, (GdkEvent *) event);
+      else
+	gtk_widget_draw_focus (widget);
+    }
   else
     gtk_widget_draw_focus (widget);
 
@@ -4970,10 +5039,8 @@ toggle_focus_row (GtkCList *clist)
     {
     case  GTK_SELECTION_SINGLE:
     case  GTK_SELECTION_MULTIPLE:
-      
       toggle_row (clist, clist->focus_row, 0, NULL);
       break;
-      
     case GTK_SELECTION_EXTENDED:
       g_list_free (clist->undo_selection);
       g_list_free (clist->undo_unselection);
@@ -4991,7 +5058,6 @@ toggle_focus_row (GtkCList *clist)
 
       GTK_CLIST_CLASS_FW (clist)->resync_selection (clist, NULL);
       break;
-      
     default:
       break;
     }
@@ -5267,7 +5333,6 @@ resync_selection (GtkCList *clist,
 
   if (clist->undo_selection)
     {
-
       list = clist->selection;
       clist->selection = clist->undo_selection;
       clist->selection_end = g_list_last (clist->selection);
@@ -5280,30 +5345,36 @@ resync_selection (GtkCList *clist,
 	  if (row < i || row > e)
 	    {
 	      clist_row = g_list_nth (clist->row_list, row)->data;
-	      clist_row->state = GTK_STATE_SELECTED;
+	      if (clist_row->selectable)
-	      unselect_row (clist, row, -1, event);
+		{
-	      clist->undo_selection = g_list_prepend
+		  clist_row->state = GTK_STATE_SELECTED;
-		(clist->undo_selection, GINT_TO_POINTER (row));
+		  unselect_row (clist, row, -1, event);
+		  clist->undo_selection = g_list_prepend
+		    (clist->undo_selection, GINT_TO_POINTER (row));
+		}
 	    }
 	}
     }    
 
   for (list = g_list_nth (clist->row_list, i); i <= e; i++, list = list->next)
-    if (g_list_find (clist->selection, GINT_TO_POINTER(i)))
+    if (GTK_CLIST_ROW (list)->selectable)
       {
-	if (GTK_CLIST_ROW (list)->state == GTK_STATE_NORMAL)
+	if (g_list_find (clist->selection, GINT_TO_POINTER(i)))
 	  {
-	    GTK_CLIST_ROW (list)->state = GTK_STATE_SELECTED;
+	    if (GTK_CLIST_ROW (list)->state == GTK_STATE_NORMAL)
-	    unselect_row (clist, i, -1, event);
+	      {
-	    clist->undo_selection = g_list_prepend (clist->undo_selection,
+		GTK_CLIST_ROW (list)->state = GTK_STATE_SELECTED;
-						    GINT_TO_POINTER (i));
+		unselect_row (clist, i, -1, event);
+		clist->undo_selection = g_list_prepend (clist->undo_selection,
+							GINT_TO_POINTER (i));
+	      }
+	  }
+	else if (GTK_CLIST_ROW (list)->state == GTK_STATE_SELECTED)
+	  {
+	    GTK_CLIST_ROW (list)->state = GTK_STATE_NORMAL;
+	    clist->undo_unselection = g_list_prepend (clist->undo_unselection,
+						      GINT_TO_POINTER (i));
 	  }
-      }
-    else if (GTK_CLIST_ROW (list)->state == GTK_STATE_SELECTED)
-      {
-	GTK_CLIST_ROW (list)->state = GTK_STATE_NORMAL;
-	clist->undo_unselection = g_list_prepend (clist->undo_unselection,
-						  GINT_TO_POINTER (i));
       }
 
   for (list = clist->undo_unselection; list; list = list->next)
@@ -5397,12 +5468,13 @@ update_extended_selection (GtkCList *clist,
     {
       for (i = s1, list = g_list_nth (clist->row_list, i); i <= e1;
 	   i++, list = list->next)
-	{
+	if (GTK_CLIST_ROW (list)->selectable)
-	  if (GTK_CLIST_CLASS_FW (clist)->selection_find (clist, i, list))
+	  {
-            GTK_CLIST_ROW (list)->state = GTK_STATE_SELECTED;
+	    if (GTK_CLIST_CLASS_FW (clist)->selection_find (clist, i, list))
-          else
+	      GTK_CLIST_ROW (list)->state = GTK_STATE_SELECTED;
-            GTK_CLIST_ROW (list)->state = GTK_STATE_NORMAL;
+	    else
-	}
+	      GTK_CLIST_ROW (list)->state = GTK_STATE_NORMAL;
+	  }
 
       top = ROW_TOP_YPIXEL (clist, clist->focus_row);
 
@@ -5434,7 +5506,8 @@ update_extended_selection (GtkCList *clist,
     {
       for (i = s2, list = g_list_nth (clist->row_list, i); i <= e2;
 	   i++, list = list->next)
-	if (GTK_CLIST_ROW (list)->state != clist->anchor_state)
+	if (GTK_CLIST_ROW (list)->selectable &&
+	    GTK_CLIST_ROW (list)->state != clist->anchor_state)
 	  GTK_CLIST_ROW (list)->state = clist->anchor_state;
 
       top = ROW_TOP_YPIXEL (clist, clist->focus_row);
@@ -5459,7 +5532,7 @@ update_extended_selection (GtkCList *clist,
 	gtk_clist_moveto (clist, clist->focus_row, -1, 1, 0);
 
       y2 = ROW_TOP_YPIXEL (clist, s2);
-      h2 = (e2-s2+1) * (clist->row_height + CELL_SPACING);
+      h2 = (e2 - s2 + 1) * (clist->row_height + CELL_SPACING);
     }
 
   area.y = MAX (0, MIN (y1, y2));
@@ -5947,7 +6020,8 @@ fake_unselect_all (GtkCList * clist,
 
   if (row >= 0 && (work = g_list_nth (clist->row_list, row)))
     {
-      if (GTK_CLIST_ROW (work)->state == GTK_STATE_NORMAL)
+      if (GTK_CLIST_ROW (work)->state == GTK_STATE_NORMAL &&
+	  GTK_CLIST_ROW (work)->selectable)
 	{
 	  GTK_CLIST_ROW (work)->state = GTK_STATE_SELECTED;
 	  
@@ -5982,7 +6056,8 @@ fake_toggle_row (GtkCList *clist,
 {
   GList *work;
 
-  if (!(work = g_list_nth (clist->row_list, row)))
+  if (!(work = g_list_nth (clist->row_list, row))||
+      !GTK_CLIST_ROW (work)->selectable)
     return;
   
   if (GTK_CLIST_ROW (work)->state == GTK_STATE_NORMAL)

gtk/gtkclist.h

@@ -275,8 +275,9 @@ struct _GtkCListRow
   gpointer data;
   GtkDestroyNotify destroy;
   
-  gint fg_set : 1;
+  gint fg_set     : 1;
-  gint bg_set : 1;
+  gint bg_set     : 1;
+  gint selectable : 1;
 };
 
 /* Cell Structures */
@@ -518,6 +519,13 @@ void gtk_clist_set_shift (GtkCList *clist,
 			  gint      vertical,
 			  gint      horizontal);
 
+/* set/get selectable flag of a single row */
+void gtk_clist_set_selectable (GtkCList *clist,
+			       gint      row,
+			       gboolean  selectable);
+gboolean gtk_clist_get_selectable (GtkCList *clist,
+				   gint      row);
+
 /* append returns the index of the row you just added, making
  * it easier to append and modify a row
  */

gtk/gtkctree.c

@@ -3239,7 +3239,8 @@ tree_select (GtkCTree     *ctree,
 	     GtkCTreeNode *node, 
 	     gpointer      data)
 {
-  if (node && GTK_CTREE_ROW (node)->row.state != GTK_STATE_SELECTED)
+  if (node && GTK_CTREE_ROW (node)->row.state != GTK_STATE_SELECTED &&
+      GTK_CTREE_ROW (node)->row.selectable)
     gtk_signal_emit (GTK_OBJECT (ctree), ctree_signals[TREE_SELECT_ROW],
 		     node, -1);
 }
@@ -3315,11 +3316,12 @@ row_new (GtkCTree *ctree)
 
   GTK_CELL_PIXTEXT (ctree_row->row.cell[ctree->tree_column])->text = NULL;
 
-  ctree_row->row.fg_set  = FALSE;
+  ctree_row->row.fg_set     = FALSE;
-  ctree_row->row.bg_set  = FALSE;
+  ctree_row->row.bg_set     = FALSE;
-  ctree_row->row.state   = GTK_STATE_NORMAL;
+  ctree_row->row.selectable = TRUE;
-  ctree_row->row.data    = NULL;
+  ctree_row->row.state      = GTK_STATE_NORMAL;
-  ctree_row->row.destroy = NULL;
+  ctree_row->row.data       = NULL;
+  ctree_row->row.destroy    = NULL;
 
   ctree_row->level         = 0;
   ctree_row->expanded      = FALSE;
@@ -3379,7 +3381,8 @@ real_select_row (GtkCList *clist,
   g_return_if_fail (clist != NULL);
   g_return_if_fail (GTK_IS_CTREE (clist));
   
-  if ((node = g_list_nth (clist->row_list, row)))
+  if ((node = g_list_nth (clist->row_list, row)) &&
+      GTK_CTREE_ROW (node)->row.selectable)
     gtk_signal_emit (GTK_OBJECT (clist), ctree_signals[TREE_SELECT_ROW],
 		     node, column);
 }
@@ -3413,7 +3416,8 @@ real_tree_select (GtkCTree     *ctree,
   g_return_if_fail (ctree != NULL);
   g_return_if_fail (GTK_IS_CTREE (ctree));
 
-  if (!node || GTK_CTREE_ROW (node)->row.state == GTK_STATE_SELECTED)
+  if (!node || GTK_CTREE_ROW (node)->row.state == GTK_STATE_SELECTED ||
+      !GTK_CTREE_ROW (node)->row.selectable)
     return;
 
   clist = GTK_CLIST (ctree);
@@ -3502,13 +3506,14 @@ tree_toggle_selection (GtkCTree     *ctree,
       if (node && GTK_CTREE_ROW (node)->row.state == GTK_STATE_SELECTED)
 	gtk_signal_emit (GTK_OBJECT (ctree), ctree_signals[TREE_UNSELECT_ROW], 
 			 node, column);
-      else if (node)
+      else if (node && GTK_CTREE_ROW (node)->row.selectable)
 	gtk_signal_emit (GTK_OBJECT (ctree), ctree_signals[TREE_SELECT_ROW], 
 			 node, column);
       break;
 
     case GTK_SELECTION_BROWSE:
-      if (node && GTK_CTREE_ROW (node)->row.state == GTK_STATE_NORMAL)
+      if (node && GTK_CTREE_ROW (node)->row.state == GTK_STATE_NORMAL &&
+	  GTK_CTREE_ROW (node)->row.selectable)
 	gtk_signal_emit (GTK_OBJECT (ctree), ctree_signals[TREE_SELECT_ROW], 
 			 node, column);
       break;
@@ -3523,7 +3528,8 @@ select_row_recursive (GtkCTree     *ctree,
 		      GtkCTreeNode *node, 
 		      gpointer      data)
 {
-  if (!node || GTK_CTREE_ROW (node)->row.state == GTK_STATE_SELECTED)
+  if (!node || GTK_CTREE_ROW (node)->row.state == GTK_STATE_SELECTED ||
+      !GTK_CTREE_ROW (node)->row.selectable)
     return;
 
   GTK_CLIST (ctree)->undo_unselection = 
@@ -4553,8 +4559,9 @@ gtk_ctree_select (GtkCTree     *ctree,
   g_return_if_fail (GTK_IS_CTREE (ctree));
   g_return_if_fail (node != NULL);
 
-  gtk_signal_emit (GTK_OBJECT (ctree), ctree_signals[TREE_SELECT_ROW],
+  if (GTK_CTREE_ROW (node)->row.selectable)
-		   node, -1);
+    gtk_signal_emit (GTK_OBJECT (ctree), ctree_signals[TREE_SELECT_ROW],
+		     node, -1);
 }
 
 void
@@ -4799,6 +4806,60 @@ gtk_ctree_node_set_shift (GtkCTree     *ctree,
   tree_draw_node (ctree, node);
 }
 
+void
+gtk_ctree_node_set_selectable (GtkCTree     *ctree,
+			       GtkCTreeNode *node,
+			       gboolean     selectable)
+{
+  g_return_if_fail (ctree != NULL);
+  g_return_if_fail (GTK_IS_CTREE (ctree));
+  g_return_if_fail (node != NULL);
+
+  if (selectable == GTK_CTREE_ROW (node)->row.selectable)
+    return;
+
+  GTK_CTREE_ROW (node)->row.selectable = selectable;
+
+  if (!selectable && GTK_CTREE_ROW (node)->row.state == GTK_STATE_SELECTED)
+    {
+      GtkCList *clist;
+
+      clist = GTK_CLIST (ctree);
+
+      if (clist->anchor >= 0 &&
+	  clist->selection_mode == GTK_SELECTION_EXTENDED)
+	{
+	  if ((gdk_pointer_is_grabbed () && GTK_WIDGET_HAS_FOCUS (clist)))
+	    {
+	      GTK_CLIST_UNSET_FLAG (clist, CLIST_DRAG_SELECTION);
+	      gtk_grab_remove (GTK_WIDGET (clist));
+	      gdk_pointer_ungrab (GDK_CURRENT_TIME);
+	      if (clist->htimer)
+		{
+		  gtk_timeout_remove (clist->htimer);
+		  clist->htimer = 0;
+		}
+	      if (clist->vtimer)
+		{
+		  gtk_timeout_remove (clist->vtimer);
+		  clist->vtimer = 0;
+		}
+	    }
+	  GTK_CLIST_CLASS_FW (clist)->resync_selection (clist, NULL);
+	}
+      gtk_ctree_unselect (ctree, node);
+    }      
+}
+
+gboolean
+gtk_ctree_node_get_selectable (GtkCTree     *ctree,
+			       GtkCTreeNode *node)
+{
+  g_return_val_if_fail (node != NULL, FALSE);
+
+  return GTK_CTREE_ROW (node)->row.selectable;
+}
+
 GtkCellType 
 gtk_ctree_node_get_cell_type (GtkCTree     *ctree,
 			      GtkCTreeNode *node,
@@ -5327,7 +5388,8 @@ fake_unselect_all (GtkCList *clist,
 
   if (row >= 0 && (focus_node = g_list_nth (clist->row_list, row)))
     {
-      if (GTK_CTREE_ROW (focus_node)->row.state == GTK_STATE_NORMAL)
+      if (GTK_CTREE_ROW (focus_node)->row.state == GTK_STATE_NORMAL &&
+	  GTK_CTREE_ROW (focus_node)->row.selectable)
 	{
 	  GTK_CTREE_ROW (focus_node)->row.state = GTK_STATE_SELECTED;
 	  
@@ -5410,7 +5472,7 @@ resync_selection (GtkCList *clist, GdkEvent *event)
 	      if (row >= i && row <= e)
 		unselect = FALSE;
 	    }
-	  if (unselect)
+	  if (unselect && GTK_CTREE_ROW (node)->row.selectable)
 	    {
 	      GTK_CTREE_ROW (node)->row.state = GTK_STATE_SELECTED;
 	      gtk_ctree_unselect (ctree, node);
@@ -5423,21 +5485,24 @@ resync_selection (GtkCList *clist, GdkEvent *event)
 
   for (node = GTK_CTREE_NODE (g_list_nth (clist->row_list, i)); i <= e;
        i++, node = GTK_CTREE_NODE_NEXT (node))
-    if (g_list_find (clist->selection, node))
+    if (GTK_CTREE_ROW (node)->row.selectable)
       {
-	if (GTK_CTREE_ROW (node)->row.state == GTK_STATE_NORMAL)
+	if (g_list_find (clist->selection, node))
 	  {
-	    GTK_CTREE_ROW (node)->row.state = GTK_STATE_SELECTED;
+	    if (GTK_CTREE_ROW (node)->row.state == GTK_STATE_NORMAL)
-	    gtk_ctree_unselect (ctree, node);
+	      {
-	    clist->undo_selection = g_list_prepend (clist->undo_selection,
+		GTK_CTREE_ROW (node)->row.state = GTK_STATE_SELECTED;
-						    node);
+		gtk_ctree_unselect (ctree, node);
+		clist->undo_selection = g_list_prepend (clist->undo_selection,
+							node);
+	      }
+	  }
+	else if (GTK_CTREE_ROW (node)->row.state == GTK_STATE_SELECTED)
+	  {
+	    GTK_CTREE_ROW (node)->row.state = GTK_STATE_NORMAL;
+	    clist->undo_unselection = g_list_prepend (clist->undo_unselection,
+						      node);
 	  }
-      }
-    else if (GTK_CTREE_ROW (node)->row.state == GTK_STATE_SELECTED)
-      {
-	GTK_CTREE_ROW (node)->row.state = GTK_STATE_NORMAL;
-	clist->undo_unselection = g_list_prepend (clist->undo_unselection,
-						  node);
       }
 
   for (list = clist->undo_unselection; list; list = list->next)
@@ -5471,10 +5536,12 @@ real_undo_selection (GtkCList *clist)
   ctree = GTK_CTREE (clist);
 
   for (work = clist->undo_selection; work; work = work->next)
-    gtk_ctree_select (ctree, GTK_CTREE_NODE (work->data));
+    if (GTK_CTREE_ROW (work->data)->row.selectable)
+      gtk_ctree_select (ctree, GTK_CTREE_NODE (work->data));
 
   for (work = clist->undo_unselection; work; work = work->next)
-    gtk_ctree_unselect (ctree, GTK_CTREE_NODE (work->data));
+    if (GTK_CTREE_ROW (work->data)->row.selectable)
+      gtk_ctree_unselect (ctree, GTK_CTREE_NODE (work->data));
 
   if (GTK_WIDGET_HAS_FOCUS (clist) && clist->focus_row != clist->undo_anchor)
     {

gtk/gtkctree.h

@@ -321,6 +321,11 @@ void gtk_ctree_node_set_shift                    (GtkCTree     *ctree,
 						  gint          column,
 						  gint          vertical,
 						  gint          horizontal);
+void gtk_ctree_node_set_selectable               (GtkCTree     *ctree,
+						  GtkCTreeNode *node,
+						  gboolean      selectable);
+gboolean gtk_ctree_node_get_selectable           (GtkCTree     *ctree,
+						  GtkCTreeNode *node);
 GtkCellType gtk_ctree_node_get_cell_type         (GtkCTree     *ctree,
 						  GtkCTreeNode *node,
 						  gint          column);