Pileus Git - ~andy/gtk/blob - gtk/gtktreeselection.c

   1 /* gtktreeselection.h
   2  * Copyright (C) 2000  Red Hat, Inc.,  Jonathan Blandford <jrb@redhat.com>
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Library General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Library General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Library General Public
  15  * License along with this library; if not, write to the
  16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  */
  19
  20 #include "gtktreeselection.h"
  21 #include "gtktreeprivate.h"
  22 #include "gtkrbtree.h"
  23 #include "gtkmarshalers.h"
  24
  25 static void gtk_tree_selection_init              (GtkTreeSelection      *selection);
  26 static void gtk_tree_selection_class_init        (GtkTreeSelectionClass *class);
  27
  28 static void gtk_tree_selection_finalize          (GObject               *object);
  29 static gint gtk_tree_selection_real_select_all   (GtkTreeSelection      *selection);
  30 static gint gtk_tree_selection_real_unselect_all (GtkTreeSelection      *selection);
  31 static gint gtk_tree_selection_real_select_node  (GtkTreeSelection      *selection,
  32                                                   GtkRBTree             *tree,
  33                                                   GtkRBNode             *node,
  34                                                   gboolean               select);
  35
  36 enum
  37 {
  38   CHANGED,
  39   LAST_SIGNAL
  40 };
  41
  42 static GObjectClass *parent_class = NULL;
  43 static guint tree_selection_signals [LAST_SIGNAL] = { 0 };
  44
  45 GType
  46 gtk_tree_selection_get_type (void)
  47 {
  48   static GType selection_type = 0;
  49
  50   if (!selection_type)
  51     {
  52       static const GTypeInfo selection_info =
  53       {
  54         sizeof (GtkTreeSelectionClass),
  55         NULL,           /* base_init */
  56         NULL,           /* base_finalize */
  57         (GClassInitFunc) gtk_tree_selection_class_init,
  58         NULL,           /* class_finalize */
  59         NULL,           /* class_data */
  60         sizeof (GtkTreeSelection),
  61         0,              /* n_preallocs */
  62         (GInstanceInitFunc) gtk_tree_selection_init
  63       };
  64
  65       selection_type =
  66         g_type_register_static (G_TYPE_OBJECT, "GtkTreeSelection",
  67                                 &selection_info, 0);
  68     }
  69
  70   return selection_type;
  71 }
  72
  73 static void
  74 gtk_tree_selection_class_init (GtkTreeSelectionClass *class)
  75 {
  76   GObjectClass *object_class;
  77
  78   object_class = (GObjectClass*) class;
  79   parent_class = g_type_class_peek_parent (class);
  80
  81   object_class->finalize = gtk_tree_selection_finalize;
  82   class->changed = NULL;
  83
  84   tree_selection_signals[CHANGED] =
  85     g_signal_new ("changed",
  86                   G_OBJECT_CLASS_TYPE (object_class),
  87                   G_SIGNAL_RUN_FIRST,
  88                   G_STRUCT_OFFSET (GtkTreeSelectionClass, changed),
  89                   NULL, NULL,
  90                   _gtk_marshal_VOID__VOID,
  91                   G_TYPE_NONE, 0);
  92 }
  93
  94 static void
  95 gtk_tree_selection_init (GtkTreeSelection *selection)
  96 {
  97   selection->type = GTK_SELECTION_SINGLE;
  98 }
  99
 100 static void
 101 gtk_tree_selection_finalize (GObject *object)
 102 {
 103   GtkTreeSelection *selection = GTK_TREE_SELECTION (object);
 104
 105   if (selection->destroy)
 106     {
 107       GtkDestroyNotify d = selection->destroy;
 108
 109       selection->destroy = NULL;
 110       d (selection->user_data);
 111     }
 112
 113   /* chain parent_class' handler */
 114   G_OBJECT_CLASS (parent_class)->finalize (object);
 115 }
 116
 117 /**
 118  * _gtk_tree_selection_new:
 119  *
 120  * Creates a new #GtkTreeSelection object.  This function should not be invoked,
 121  * as each #GtkTreeView will create it's own #GtkTreeSelection.
 122  *
 123  * Return value: A newly created #GtkTreeSelection object.
 124  **/
 125 GtkTreeSelection*
 126 _gtk_tree_selection_new (void)
 127 {
 128   GtkTreeSelection *selection;
 129
 130   selection = g_object_new (GTK_TYPE_TREE_SELECTION, NULL);
 131
 132   return selection;
 133 }
 134
 135 /**
 136  * _gtk_tree_selection_new_with_tree_view:
 137  * @tree_view: The #GtkTreeView.
 138  *
 139  * Creates a new #GtkTreeSelection object.  This function should not be invoked,
 140  * as each #GtkTreeView will create it's own #GtkTreeSelection.
 141  *
 142  * Return value: A newly created #GtkTreeSelection object.
 143  **/
 144 GtkTreeSelection*
 145 _gtk_tree_selection_new_with_tree_view (GtkTreeView *tree_view)
 146 {
 147   GtkTreeSelection *selection;
 148
 149   g_return_val_if_fail (GTK_IS_TREE_VIEW (tree_view), NULL);
 150
 151   selection = _gtk_tree_selection_new ();
 152   _gtk_tree_selection_set_tree_view (selection, tree_view);
 153
 154   return selection;
 155 }
 156
 157 /**
 158  * _gtk_tree_selection_set_tree_view:
 159  * @selection: A #GtkTreeSelection.
 160  * @tree_view: The #GtkTreeView.
 161  *
 162  * Sets the #GtkTreeView of @selection.  This function should not be invoked, as
 163  * it is used internally by #GtkTreeView.
 164  **/
 165 void
 166 _gtk_tree_selection_set_tree_view (GtkTreeSelection *selection,
 167                                    GtkTreeView      *tree_view)
 168 {
 169   g_return_if_fail (GTK_IS_TREE_SELECTION (selection));
 170   if (tree_view != NULL)
 171     g_return_if_fail (GTK_IS_TREE_VIEW (tree_view));
 172
 173   selection->tree_view = tree_view;
 174 }
 175
 176 /**
 177  * gtk_tree_selection_set_mode:
 178  * @selection: A #GtkTreeSelection.
 179  * @type: The selection mode
 180  *
 181  * Sets the selection mode of the @selection.  If the previous type was
 182  * #GTK_SELECTION_MULTIPLE, then the anchor is kept selected, if it was
 183  * previously selected.
 184  **/
 185 void
 186 gtk_tree_selection_set_mode (GtkTreeSelection *selection,
 187                              GtkSelectionMode  type)
 188 {
 189   GtkTreeSelectionFunc tmp_func;
 190   g_return_if_fail (GTK_IS_TREE_SELECTION (selection));
 191
 192   if (selection->type == type)
 193     return;
 194
 195
 196   if (type == GTK_SELECTION_NONE)
 197     {
 198       /* We do this so that we unconditionally unset all rows
 199        */
 200       tmp_func = selection->user_func;
 201       selection->user_func = NULL;
 202       gtk_tree_selection_unselect_all (selection);
 203       selection->user_func = tmp_func;
 204
 205       gtk_tree_row_reference_free (selection->tree_view->priv->anchor);
 206       selection->tree_view->priv->anchor = NULL;
 207     }
 208   else if (type == GTK_SELECTION_SINGLE ||
 209            type == GTK_SELECTION_BROWSE)
 210     {
 211       GtkRBTree *tree = NULL;
 212       GtkRBNode *node = NULL;
 213       gint selected = FALSE;
 214       GtkTreePath *anchor_path = NULL;
 215
 216       if (selection->tree_view->priv->anchor)
 217         {
 218           anchor_path = gtk_tree_row_reference_get_path (selection->tree_view->priv->anchor);
 219
 220           if (anchor_path)
 221             {
 222               _gtk_tree_view_find_node (selection->tree_view,
 223                                         anchor_path,
 224                                         &tree,
 225                                         &node);
 226
 227               if (node && GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_IS_SELECTED))
 228                 selected = TRUE;
 229             }
 230         }
 231
 232       /* We do this so that we unconditionally unset all rows
 233        */
 234       tmp_func = selection->user_func;
 235       selection->user_func = NULL;
 236       gtk_tree_selection_unselect_all (selection);
 237       selection->user_func = tmp_func;
 238
 239       if (node && selected)
 240         _gtk_tree_selection_internal_select_node (selection,
 241                                                   node,
 242                                                   tree,
 243                                                   anchor_path,
 244                                                   0,
 245                                                   FALSE);
 246       if (anchor_path)
 247         gtk_tree_path_free (anchor_path);
 248     }
 249
 250   selection->type = type;
 251 }
 252
 253 /**
 254  * gtk_tree_selection_get_mode:
 255  * @selection: a #GtkTreeSelection
 256  *
 257  * Gets the selection mode for @selection. See
 258  * gtk_tree_selection_set_mode().
 259  *
 260  * Return value: the current selection mode
 261  **/
 262 GtkSelectionMode
 263 gtk_tree_selection_get_mode (GtkTreeSelection *selection)
 264 {
 265   g_return_val_if_fail (GTK_IS_TREE_SELECTION (selection), GTK_SELECTION_SINGLE);
 266
 267   return selection->type;
 268 }
 269
 270 /**
 271  * gtk_tree_selection_set_select_function:
 272  * @selection: A #GtkTreeSelection.
 273  * @func: The selection function.
 274  * @data: The selection function's data.
 275  * @destroy: The destroy function for user data.  May be NULL.
 276  *
 277  * Sets the selection function.  If set, this function is called before any node
 278  * is selected or unselected, giving some control over which nodes are selected.
 279  * The select function should return %TRUE if the state of the node may be toggled,
 280  * and %FALSE if the state of the node should be left unchanged.
 281  **/
 282 void
 283 gtk_tree_selection_set_select_function (GtkTreeSelection     *selection,
 284                                         GtkTreeSelectionFunc  func,
 285                                         gpointer              data,
 286                                         GtkDestroyNotify      destroy)
 287 {
 288   g_return_if_fail (GTK_IS_TREE_SELECTION (selection));
 289   g_return_if_fail (func != NULL);
 290
 291   if (selection->destroy)
 292     {
 293       GtkDestroyNotify d = selection->destroy;
 294
 295       selection->destroy = NULL;
 296       d (selection->user_data);
 297     }
 298
 299   selection->user_func = func;
 300   selection->user_data = data;
 301   selection->destroy = destroy;
 302 }
 303
 304 /**
 305  * gtk_tree_selection_get_user_data:
 306  * @selection: A #GtkTreeSelection.
 307  *
 308  * Returns the user data for the selection function.
 309  *
 310  * Return value: The user data.
 311  **/
 312 gpointer
 313 gtk_tree_selection_get_user_data (GtkTreeSelection *selection)
 314 {
 315   g_return_val_if_fail (GTK_IS_TREE_SELECTION (selection), NULL);
 316
 317   return selection->user_data;
 318 }
 319
 320 /**
 321  * gtk_tree_selection_get_tree_view:
 322  * @selection: A #GtkTreeSelection
 323  *
 324  * Returns the tree view associated with @selection.
 325  *
 326  * Return value: A #GtkTreeView
 327  **/
 328 GtkTreeView *
 329 gtk_tree_selection_get_tree_view (GtkTreeSelection *selection)
 330 {
 331   g_return_val_if_fail (GTK_IS_TREE_SELECTION (selection), NULL);
 332
 333   return selection->tree_view;
 334 }
 335
 336 /**
 337  * gtk_tree_selection_get_selected:
 338  * @selection: A #GtkTreeSelection.
 339  * @model: A pointer to set to the #GtkTreeModel, or NULL.
 340  * @iter: The #GtkTreeIter, or NULL.
 341  *
 342  * Sets @iter to the currently selected node if @selection is set to
 343  * #GTK_SELECTION_SINGLE or #GTK_SELECTION_BROWSE.  @iter may be NULL if you
 344  * just want to test if @selection has any selected nodes.  @model is filled
 345  * with the current model as a convenience.  This function will not work if you
 346  * use @selection is #GTK_SELECTION_MULTIPLE.
 347  *
 348  * Return value: TRUE, if there is a selected node.
 349  **/
 350 gboolean
 351 gtk_tree_selection_get_selected (GtkTreeSelection  *selection,
 352                                  GtkTreeModel     **model,
 353                                  GtkTreeIter       *iter)
 354 {
 355   GtkRBTree *tree;
 356   GtkRBNode *node;
 357   GtkTreePath *anchor_path;
 358   gboolean retval;
 359   gboolean found_node;
 360
 361   g_return_val_if_fail (GTK_IS_TREE_SELECTION (selection), FALSE);
 362   g_return_val_if_fail (selection->type != GTK_SELECTION_MULTIPLE, FALSE);
 363   g_return_val_if_fail (selection->tree_view != NULL, FALSE);
 364   g_return_val_if_fail (selection->tree_view->priv->model != NULL, FALSE);
 365
 366   if (model)
 367     *model = selection->tree_view->priv->model;
 368
 369   if (selection->tree_view->priv->anchor == NULL)
 370     return FALSE;
 371
 372   anchor_path = gtk_tree_row_reference_get_path (selection->tree_view->priv->anchor);
 373
 374   if (anchor_path == NULL)
 375     return FALSE;
 376
 377   retval = FALSE;
 378
 379   found_node = !_gtk_tree_view_find_node (selection->tree_view,
 380                                           anchor_path,
 381                                           &tree,
 382                                           &node);
 383
 384   if (found_node && GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_IS_SELECTED))
 385     {
 386       /* we only want to return the anchor if it exists in the rbtree and
 387        * is selected.
 388        */
 389       if (iter == NULL)
 390         retval = TRUE;
 391       else
 392         retval = gtk_tree_model_get_iter (selection->tree_view->priv->model,
 393                                           iter,
 394                                           anchor_path);
 395     }
 396   else
 397     {
 398       /* We don't want to return the anchor if it isn't actually selected.
 399        */
 400       retval = FALSE;
 401     }
 402
 403   gtk_tree_path_free (anchor_path);
 404
 405   return retval;
 406 }
 407
 408 /**
 409  * gtk_tree_selection_get_selected_rows:
 410  * @selection: A #GtkTreeSelection.
 411  * @model: A pointer to set to the #GtkTreeModel, or NULL.
 412  *
 413  * Creates a list of path of all selected rows. Additionally, if you are
 414  * planning on modifying the model after calling this function, you may
 415  * want to convert the returned list into a list of #GtkTreeRowReference<!-- -->s.
 416  * To do this, you can use gtk_tree_row_reference_new_proxy().
 417  *
 418  * To free the return value, use:
 419  * <informalexample><programlisting>
 420  * g_list_foreach (list, gtk_tree_path_free, NULL);
 421  * g_list_free (list);
 422  * </programlisting></informalexample>
 423  *
 424  * Return value: A #GList containing a #GtkTreePath for each selected row.
 425  **/
 426 GList *
 427 gtk_tree_selection_get_selected_rows (GtkTreeSelection   *selection,
 428                                       GtkTreeModel      **model)
 429 {
 430   GList *list = NULL;
 431   GtkRBTree *tree = NULL;
 432   GtkRBNode *node = NULL;
 433   GtkTreePath *path;
 434
 435   g_return_val_if_fail (GTK_IS_TREE_SELECTION (selection), NULL);
 436   g_return_val_if_fail (selection->tree_view != NULL, NULL);
 437   g_return_val_if_fail (selection->tree_view->priv->model != NULL, NULL);
 438
 439   if (selection->tree_view->priv->tree == NULL ||
 440       selection->tree_view->priv->tree->root == NULL)
 441     return NULL;
 442
 443   if (model)
 444     *model = selection->tree_view->priv->model;
 445
 446   if (selection->type == GTK_SELECTION_NONE)
 447     return NULL;
 448   else if (selection->type != GTK_SELECTION_MULTIPLE)
 449     {
 450       GtkTreeIter iter;
 451
 452       if (gtk_tree_selection_get_selected (selection, NULL, &iter))
 453         {
 454           GtkTreePath *path;
 455
 456           path = gtk_tree_model_get_path (*model, &iter);
 457           list = g_list_append (list, path);
 458
 459           return list;
 460         }
 461
 462       return NULL;
 463     }
 464
 465   tree = selection->tree_view->priv->tree;
 466   node = selection->tree_view->priv->tree->root;
 467
 468   while (node->left != tree->nil)
 469     node = node->left;
 470   path = gtk_tree_path_new_first ();
 471
 472   do
 473     {
 474       if (GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_IS_SELECTED))
 475         list = g_list_append (list, gtk_tree_path_copy (path));
 476
 477       if (node->children)
 478         {
 479           tree = node->children;
 480           node = tree->root;
 481
 482           while (node->left != tree->nil)
 483             node = node->left;
 484
 485           gtk_tree_path_append_index (path, 0);
 486         }
 487       else
 488         {
 489           gboolean done = FALSE;
 490
 491           do
 492             {
 493               node = _gtk_rbtree_next (tree, node);
 494               if (node != NULL)
 495                 {
 496                   done = TRUE;
 497                   gtk_tree_path_next (path);
 498                 }
 499               else
 500                 {
 501                   node = tree->parent_node;
 502                   tree = tree->parent_tree;
 503
 504                   if (!tree)
 505                     {
 506                       gtk_tree_path_free (path);
 507                       return list;
 508                     }
 509
 510                   gtk_tree_path_up (path);
 511                 }
 512             }
 513           while (!done);
 514         }
 515     }
 516   while (TRUE);
 517
 518   gtk_tree_path_free (path);
 519
 520   return list;
 521 }
 522
 523 static void
 524 gtk_tree_selection_count_selected_rows_helper (GtkRBTree *tree,
 525                                                GtkRBNode *node,
 526                                                gpointer   data)
 527 {
 528   gint *count = (gint *)data;
 529
 530   if (GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_IS_SELECTED))
 531     (*count)++;
 532
 533   if (node->children)
 534     _gtk_rbtree_traverse (node->children, node->children->root,
 535                           G_PRE_ORDER,
 536                           gtk_tree_selection_count_selected_rows_helper, data);
 537 }
 538
 539 /**
 540  * gtk_tree_selection_count_selected_rows:
 541  * @selection: A #GtkTreeSelection.
 542  *
 543  * Returns the number of rows that have been selected in @tree.
 544  *
 545  * Return value: The number of rows selected.
 546  **/
 547 gint
 548 gtk_tree_selection_count_selected_rows (GtkTreeSelection *selection)
 549 {
 550   gint count = 0;
 551   GtkRBTree *tree;
 552   GtkRBNode *node;
 553
 554   g_return_val_if_fail (GTK_IS_TREE_SELECTION (selection), 0);
 555   g_return_val_if_fail (selection->tree_view != NULL, 0);
 556   g_return_val_if_fail (selection->tree_view->priv->model != NULL, 0);
 557
 558   if (selection->tree_view->priv->tree == NULL ||
 559       selection->tree_view->priv->tree->root == NULL)
 560     return 0;
 561
 562   if (selection->type == GTK_SELECTION_SINGLE ||
 563       selection->type == GTK_SELECTION_BROWSE)
 564     {
 565       if (gtk_tree_selection_get_selected (selection, NULL, NULL))
 566         return 1;
 567       else
 568         return 0;
 569     }
 570
 571   tree = selection->tree_view->priv->tree;
 572   node = selection->tree_view->priv->tree->root;
 573
 574   _gtk_rbtree_traverse (selection->tree_view->priv->tree,
 575                         selection->tree_view->priv->tree->root,
 576                         G_PRE_ORDER,
 577                         gtk_tree_selection_count_selected_rows_helper,
 578                         &count);
 579
 580   return count;
 581 }
 582
 583 /* gtk_tree_selection_selected_foreach helper */
 584 static void
 585 model_changed (gpointer data)
 586 {
 587   gboolean *stop = (gboolean *)data;
 588
 589   *stop = TRUE;
 590 }
 591
 592 /**
 593  * gtk_tree_selection_selected_foreach:
 594  * @selection: A #GtkTreeSelection.
 595  * @func: The function to call for each selected node.
 596  * @data: user data to pass to the function.
 597  *
 598  * Calls a function for each selected node. Note that you cannot modify
 599  * the tree or selection from within this function. As a result,
 600  * gtk_tree_selection_get_selected_rows() might be more useful.
 601  **/
 602 void
 603 gtk_tree_selection_selected_foreach (GtkTreeSelection            *selection,
 604                                      GtkTreeSelectionForeachFunc  func,
 605                                      gpointer                     data)
 606 {
 607   GtkTreePath *path;
 608   GtkRBTree *tree;
 609   GtkRBNode *node;
 610   GtkTreeIter iter;
 611
 612   guint inserted_id, deleted_id, reordered_id;
 613   gboolean stop = FALSE, has_next = FALSE, has_parent = FALSE;
 614
 615   g_return_if_fail (GTK_IS_TREE_SELECTION (selection));
 616   g_return_if_fail (selection->tree_view != NULL);
 617   g_return_if_fail (selection->tree_view->priv->model != NULL);
 618
 619   if (func == NULL ||
 620       selection->tree_view->priv->tree == NULL ||
 621       selection->tree_view->priv->tree->root == NULL)
 622     return;
 623
 624   if (selection->type == GTK_SELECTION_SINGLE ||
 625       selection->type == GTK_SELECTION_BROWSE)
 626     {
 627       if (gtk_tree_row_reference_valid (selection->tree_view->priv->anchor))
 628         {
 629           path = gtk_tree_row_reference_get_path (selection->tree_view->priv->anchor);
 630           gtk_tree_model_get_iter (selection->tree_view->priv->model, &iter, path);
 631           (* func) (selection->tree_view->priv->model, path, &iter, data);
 632           gtk_tree_path_free (path);
 633         }
 634       return;
 635     }
 636
 637   tree = selection->tree_view->priv->tree;
 638   node = selection->tree_view->priv->tree->root;
 639
 640   while (node->left != tree->nil)
 641     node = node->left;
 642
 643   /* connect to signals to monitor changes in treemodel */
 644   inserted_id = g_signal_connect_swapped (selection->tree_view->priv->model,
 645                                           "row_inserted",
 646                                           G_CALLBACK (model_changed),
 647                                           &stop);
 648   deleted_id = g_signal_connect_swapped (selection->tree_view->priv->model,
 649                                          "row_deleted",
 650                                          G_CALLBACK (model_changed),
 651                                          &stop);
 652   reordered_id = g_signal_connect_swapped (selection->tree_view->priv->model,
 653                                            "rows_reordered",
 654                                            G_CALLBACK (model_changed),
 655                                            &stop);
 656
 657   /* find the node internally */
 658   path = gtk_tree_path_new_first ();
 659   gtk_tree_model_get_iter (selection->tree_view->priv->model,
 660                            &iter, path);
 661
 662   do
 663     {
 664       if (GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_IS_SELECTED))
 665         (* func) (selection->tree_view->priv->model, path, &iter, data);
 666
 667       if (stop)
 668         goto out;
 669
 670       if (node->children)
 671         {
 672           gboolean has_child;
 673           GtkTreeIter tmp;
 674
 675           tree = node->children;
 676           node = tree->root;
 677           while (node->left != tree->nil)
 678             node = node->left;
 679           tmp = iter;
 680           has_child = gtk_tree_model_iter_children (selection->tree_view->priv->model, &iter, &tmp);
 681           gtk_tree_path_append_index (path, 0);
 682
 683           /* we do the sanity check at the bottom of this function */
 684           if (has_child)
 685             goto out;
 686         }
 687       else
 688         {
 689           gboolean done = FALSE;
 690           do
 691             {
 692               node = _gtk_rbtree_next (tree, node);
 693               if (node != NULL)
 694                 {
 695                   gboolean has_next;
 696
 697                   has_next = gtk_tree_model_iter_next (selection->tree_view->priv->model, &iter);
 698                   done = TRUE;
 699                   gtk_tree_path_next (path);
 700
 701                   /* Sanity Check! */
 702                   TREE_VIEW_INTERNAL_ASSERT_VOID (has_next);
 703                 }
 704               else
 705                 {
 706                   gboolean has_parent;
 707                   GtkTreeIter tmp_iter = iter;
 708
 709                   node = tree->parent_node;
 710                   tree = tree->parent_tree;
 711                   if (tree == NULL)
 712                     {
 713                       /* we've run out of tree */
 714                       /* We're done with this function */
 715
 716                       goto out;
 717                     }
 718
 719                   has_parent = gtk_tree_model_iter_parent (selection->tree_view->priv->model, &iter, &tmp_iter);
 720                   gtk_tree_path_up (path);
 721
 722                   /* we do the sanity check at the bottom of this function */
 723                   if (has_parent)
 724                     goto out;
 725                 }
 726             }
 727           while (!done);
 728         }
 729     }
 730   while (TRUE);
 731
 732 out:
 733   if (path)
 734     gtk_tree_path_free (path);
 735
 736   g_signal_handler_disconnect (selection->tree_view->priv->model,
 737                                inserted_id);
 738   g_signal_handler_disconnect (selection->tree_view->priv->model,
 739                                deleted_id);
 740   g_signal_handler_disconnect (selection->tree_view->priv->model,
 741                                reordered_id);
 742
 743   /* check if we have to spew a scary message */
 744   if (has_next)
 745     TREE_VIEW_INTERNAL_ASSERT_VOID (has_next);
 746   if (has_parent)
 747     TREE_VIEW_INTERNAL_ASSERT_VOID (has_parent);
 748   if (stop)
 749     g_warning
 750       ("The model has been modified from within gtk_tree_selection_foreach.\n"
 751        "This function is for observing the selections of the tree only.  If\n"
 752        "you are trying to get all selected items from the tree, try using\n"
 753        "gtk_tree_selection_get_selected_rows instead.\n");
 754 }
 755
 756 /**
 757  * gtk_tree_selection_select_path:
 758  * @selection: A #GtkTreeSelection.
 759  * @path: The #GtkTreePath to be selected.
 760  *
 761  * Select the row at @path.
 762  **/
 763 void
 764 gtk_tree_selection_select_path (GtkTreeSelection *selection,
 765                                 GtkTreePath      *path)
 766 {
 767   GtkRBNode *node;
 768   GtkRBTree *tree;
 769   GdkModifierType state = 0;
 770   gboolean ret;
 771
 772   g_return_if_fail (GTK_IS_TREE_SELECTION (selection));
 773   g_return_if_fail (selection->tree_view != NULL);
 774   g_return_if_fail (path != NULL);
 775
 776   ret = _gtk_tree_view_find_node (selection->tree_view,
 777                                   path,
 778                                   &tree,
 779                                   &node);
 780
 781   if (node == NULL || GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_IS_SELECTED) ||
 782       ret == TRUE)
 783     return;
 784
 785   if (selection->type == GTK_SELECTION_MULTIPLE)
 786     state = GDK_CONTROL_MASK;
 787
 788   _gtk_tree_selection_internal_select_node (selection,
 789                                             node,
 790                                             tree,
 791                                             path,
 792                                             state,
 793                                             FALSE);
 794 }
 795
 796 /**
 797  * gtk_tree_selection_unselect_path:
 798  * @selection: A #GtkTreeSelection.
 799  * @path: The #GtkTreePath to be unselected.
 800  *
 801  * Unselects the row at @path.
 802  **/
 803 void
 804 gtk_tree_selection_unselect_path (GtkTreeSelection *selection,
 805                                   GtkTreePath      *path)
 806 {
 807   GtkRBNode *node;
 808   GtkRBTree *tree;
 809   gboolean ret;
 810
 811   g_return_if_fail (GTK_IS_TREE_SELECTION (selection));
 812   g_return_if_fail (selection->tree_view != NULL);
 813   g_return_if_fail (path != NULL);
 814
 815   ret = _gtk_tree_view_find_node (selection->tree_view,
 816                                   path,
 817                                   &tree,
 818                                   &node);
 819
 820   if (node == NULL || !GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_IS_SELECTED) ||
 821       ret == TRUE)
 822     return;
 823
 824   _gtk_tree_selection_internal_select_node (selection,
 825                                             node,
 826                                             tree,
 827                                             path,
 828                                             GDK_CONTROL_MASK,
 829                                             TRUE);
 830 }
 831
 832 /**
 833  * gtk_tree_selection_select_iter:
 834  * @selection: A #GtkTreeSelection.
 835  * @iter: The #GtkTreeIter to be selected.
 836  *
 837  * Selects the specified iterator.
 838  **/
 839 void
 840 gtk_tree_selection_select_iter (GtkTreeSelection *selection,
 841                                 GtkTreeIter      *iter)
 842 {
 843   GtkTreePath *path;
 844
 845   g_return_if_fail (GTK_IS_TREE_SELECTION (selection));
 846   g_return_if_fail (selection->tree_view != NULL);
 847   g_return_if_fail (selection->tree_view->priv->model != NULL);
 848   g_return_if_fail (iter != NULL);
 849
 850   path = gtk_tree_model_get_path (selection->tree_view->priv->model,
 851                                   iter);
 852
 853   if (path == NULL)
 854     return;
 855
 856   gtk_tree_selection_select_path (selection, path);
 857   gtk_tree_path_free (path);
 858 }
 859
 860
 861 /**
 862  * gtk_tree_selection_unselect_iter:
 863  * @selection: A #GtkTreeSelection.
 864  * @iter: The #GtkTreeIter to be unselected.
 865  *
 866  * Unselects the specified iterator.
 867  **/
 868 void
 869 gtk_tree_selection_unselect_iter (GtkTreeSelection *selection,
 870                                   GtkTreeIter      *iter)
 871 {
 872   GtkTreePath *path;
 873
 874   g_return_if_fail (GTK_IS_TREE_SELECTION (selection));
 875   g_return_if_fail (selection->tree_view != NULL);
 876   g_return_if_fail (selection->tree_view->priv->model != NULL);
 877   g_return_if_fail (iter != NULL);
 878
 879   path = gtk_tree_model_get_path (selection->tree_view->priv->model,
 880                                   iter);
 881
 882   if (path == NULL)
 883     return;
 884
 885   gtk_tree_selection_unselect_path (selection, path);
 886   gtk_tree_path_free (path);
 887 }
 888
 889 /**
 890  * gtk_tree_selection_path_is_selected:
 891  * @selection: A #GtkTreeSelection.
 892  * @path: A #GtkTreePath to check selection on.
 893  *
 894  * Returns %TRUE if the row pointed to by @path is currently selected.  If @path
 895  * does not point to a valid location, %FALSE is returned
 896  *
 897  * Return value: %TRUE if @path is selected.
 898  **/
 899 gboolean
 900 gtk_tree_selection_path_is_selected (GtkTreeSelection *selection,
 901                                      GtkTreePath      *path)
 902 {
 903   GtkRBNode *node;
 904   GtkRBTree *tree;
 905   gboolean ret;
 906
 907   g_return_val_if_fail (GTK_IS_TREE_SELECTION (selection), FALSE);
 908   g_return_val_if_fail (path != NULL, FALSE);
 909   g_return_val_if_fail (selection->tree_view != NULL, FALSE);
 910   g_return_val_if_fail (selection->tree_view->priv->model != NULL, FALSE);
 911
 912   ret = _gtk_tree_view_find_node (selection->tree_view,
 913                                   path,
 914                                   &tree,
 915                                   &node);
 916
 917   if ((node == NULL) || !GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_IS_SELECTED) ||
 918       ret == TRUE)
 919     return FALSE;
 920
 921   return TRUE;
 922 }
 923
 924 /**
 925  * gtk_tree_selection_iter_is_selected:
 926  * @selection: A #GtkTreeSelection
 927  * @iter: A valid #GtkTreeIter
 928  *
 929  * Returns %TRUE if the row at @iter is currently selected.
 930  *
 931  * Return value: %TRUE, if @iter is selected
 932  **/
 933 gboolean
 934 gtk_tree_selection_iter_is_selected (GtkTreeSelection *selection,
 935                                      GtkTreeIter      *iter)
 936 {
 937   GtkTreePath *path;
 938   gboolean retval;
 939
 940   g_return_val_if_fail (GTK_IS_TREE_SELECTION (selection), FALSE);
 941   g_return_val_if_fail (iter != NULL, FALSE);
 942   g_return_val_if_fail (selection->tree_view != NULL, FALSE);
 943   g_return_val_if_fail (selection->tree_view->priv->model != NULL, FALSE);
 944
 945   path = gtk_tree_model_get_path (selection->tree_view->priv->model, iter);
 946   if (path == NULL)
 947     return FALSE;
 948
 949   retval = gtk_tree_selection_path_is_selected (selection, path);
 950   gtk_tree_path_free (path);
 951
 952   return retval;
 953 }
 954
 955
 956 /* Wish I was in python, right now... */
 957 struct _TempTuple {
 958   GtkTreeSelection *selection;
 959   gint dirty;
 960 };
 961
 962 static void
 963 select_all_helper (GtkRBTree  *tree,
 964                    GtkRBNode  *node,
 965                    gpointer    data)
 966 {
 967   struct _TempTuple *tuple = data;
 968
 969   if (node->children)
 970     _gtk_rbtree_traverse (node->children,
 971                           node->children->root,
 972                           G_PRE_ORDER,
 973                           select_all_helper,
 974                           data);
 975   if (!GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_IS_SELECTED))
 976     {
 977       tuple->dirty = gtk_tree_selection_real_select_node (tuple->selection, tree, node, TRUE) || tuple->dirty;
 978     }
 979 }
 980
 981
 982 /* We have a real_{un,}select_all function that doesn't emit the signal, so we
 983  * can use it in other places without fear of the signal being emitted.
 984  */
 985 static gint
 986 gtk_tree_selection_real_select_all (GtkTreeSelection *selection)
 987 {
 988   struct _TempTuple *tuple;
 989
 990   if (selection->tree_view->priv->tree == NULL)
 991     return FALSE;
 992
 993   /* Mark all nodes selected */
 994   tuple = g_new (struct _TempTuple, 1);
 995   tuple->selection = selection;
 996   tuple->dirty = FALSE;
 997
 998   _gtk_rbtree_traverse (selection->tree_view->priv->tree,
 999                         selection->tree_view->priv->tree->root,
1000                         G_PRE_ORDER,
1001                         select_all_helper,
1002                         tuple);
1003   if (tuple->dirty)
1004     {
1005       g_free (tuple);
1006       return TRUE;
1007     }
1008   g_free (tuple);
1009   return FALSE;
1010 }
1011
1012 /**
1013  * gtk_tree_selection_select_all:
1014  * @selection: A #GtkTreeSelection.
1015  *
1016  * Selects all the nodes.  @selection is must be set to #GTK_SELECTION_MULTIPLE
1017  * mode.
1018  **/
1019 void
1020 gtk_tree_selection_select_all (GtkTreeSelection *selection)
1021 {
1022   g_return_if_fail (GTK_IS_TREE_SELECTION (selection));
1023   g_return_if_fail (selection->tree_view != NULL);
1024   if (selection->tree_view->priv->tree == NULL)
1025     return;
1026   g_return_if_fail (selection->type == GTK_SELECTION_MULTIPLE);
1027
1028   if (gtk_tree_selection_real_select_all (selection))
1029     g_signal_emit (selection, tree_selection_signals[CHANGED], 0);
1030 }
1031
1032 static void
1033 unselect_all_helper (GtkRBTree  *tree,
1034                      GtkRBNode  *node,
1035                      gpointer    data)
1036 {
1037   struct _TempTuple *tuple = data;
1038
1039   if (node->children)
1040     _gtk_rbtree_traverse (node->children,
1041                           node->children->root,
1042                           G_PRE_ORDER,
1043                           unselect_all_helper,
1044                           data);
1045   if (GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_IS_SELECTED))
1046     {
1047       tuple->dirty = gtk_tree_selection_real_select_node (tuple->selection, tree, node, FALSE) || tuple->dirty;
1048     }
1049 }
1050
1051 static gint
1052 gtk_tree_selection_real_unselect_all (GtkTreeSelection *selection)
1053 {
1054   struct _TempTuple *tuple;
1055
1056   if (selection->type == GTK_SELECTION_SINGLE ||
1057       selection->type == GTK_SELECTION_BROWSE)
1058     {
1059       GtkRBTree *tree = NULL;
1060       GtkRBNode *node = NULL;
1061       GtkTreePath *anchor_path;
1062
1063       if (selection->tree_view->priv->anchor == NULL)
1064         return FALSE;
1065
1066       anchor_path = gtk_tree_row_reference_get_path (selection->tree_view->priv->anchor);
1067
1068       if (anchor_path == NULL)
1069         return FALSE;
1070
1071       _gtk_tree_view_find_node (selection->tree_view,
1072                                 anchor_path,
1073                                 &tree,
1074                                 &node);
1075
1076       gtk_tree_path_free (anchor_path);
1077
1078       if (tree == NULL)
1079         return FALSE;
1080
1081       if (GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_IS_SELECTED))
1082         {
1083           if (gtk_tree_selection_real_select_node (selection, tree, node, FALSE))
1084             {
1085               gtk_tree_row_reference_free (selection->tree_view->priv->anchor);
1086               selection->tree_view->priv->anchor = NULL;
1087               return TRUE;
1088             }
1089         }
1090       return FALSE;
1091     }
1092   else
1093     {
1094       tuple = g_new (struct _TempTuple, 1);
1095       tuple->selection = selection;
1096       tuple->dirty = FALSE;
1097
1098       _gtk_rbtree_traverse (selection->tree_view->priv->tree,
1099                             selection->tree_view->priv->tree->root,
1100                             G_PRE_ORDER,
1101                             unselect_all_helper,
1102                             tuple);
1103
1104       if (tuple->dirty)
1105         {
1106           g_free (tuple);
1107           return TRUE;
1108         }
1109       g_free (tuple);
1110       return FALSE;
1111     }
1112 }
1113
1114 /**
1115  * gtk_tree_selection_unselect_all:
1116  * @selection: A #GtkTreeSelection.
1117  *
1118  * Unselects all the nodes.
1119  **/
1120 void
1121 gtk_tree_selection_unselect_all (GtkTreeSelection *selection)
1122 {
1123   g_return_if_fail (GTK_IS_TREE_SELECTION (selection));
1124   g_return_if_fail (selection->tree_view != NULL);
1125   if (selection->tree_view->priv->tree == NULL)
1126     return;
1127
1128   if (selection->tree_view->priv->tree == NULL)
1129     return;
1130
1131   if (gtk_tree_selection_real_unselect_all (selection))
1132     g_signal_emit (selection, tree_selection_signals[CHANGED], 0);
1133 }
1134
1135 enum
1136 {
1137   RANGE_SELECT,
1138   RANGE_UNSELECT
1139 };
1140
1141 static gint
1142 gtk_tree_selection_real_modify_range (GtkTreeSelection *selection,
1143                                       gint              mode,
1144                                       GtkTreePath      *start_path,
1145                                       GtkTreePath      *end_path)
1146 {
1147   GtkRBNode *start_node, *end_node;
1148   GtkRBTree *start_tree, *end_tree;
1149   gboolean dirty = FALSE;
1150
1151   switch (gtk_tree_path_compare (start_path, end_path))
1152     {
1153     case 1:
1154       _gtk_tree_view_find_node (selection->tree_view,
1155                                 end_path,
1156                                 &start_tree,
1157                                 &start_node);
1158       _gtk_tree_view_find_node (selection->tree_view,
1159                                 start_path,
1160                                 &end_tree,
1161                                 &end_node);
1162       break;
1163     case 0:
1164       _gtk_tree_view_find_node (selection->tree_view,
1165                                 start_path,
1166                                 &start_tree,
1167                                 &start_node);
1168       end_tree = start_tree;
1169       end_node = start_node;
1170       break;
1171     case -1:
1172       _gtk_tree_view_find_node (selection->tree_view,
1173                                 start_path,
1174                                 &start_tree,
1175                                 &start_node);
1176       _gtk_tree_view_find_node (selection->tree_view,
1177                                 end_path,
1178                                 &end_tree,
1179                                 &end_node);
1180       break;
1181     }
1182
1183   g_return_val_if_fail (start_node != NULL, FALSE);
1184   g_return_val_if_fail (end_node != NULL, FALSE);
1185
1186   do
1187     {
1188       dirty |= gtk_tree_selection_real_select_node (selection, start_tree, start_node, (mode == RANGE_SELECT)?TRUE:FALSE);
1189
1190       if (start_node == end_node)
1191         break;
1192
1193       if (start_node->children)
1194         {
1195           start_tree = start_node->children;
1196           start_node = start_tree->root;
1197           while (start_node->left != start_tree->nil)
1198             start_node = start_node->left;
1199         }
1200       else
1201         {
1202           _gtk_rbtree_next_full (start_tree, start_node, &start_tree, &start_node);
1203           if (start_tree == NULL)
1204             {
1205               /* we just ran out of tree.  That means someone passed in bogus values.
1206                */
1207               return dirty;
1208             }
1209         }
1210     }
1211   while (TRUE);
1212
1213   return dirty;
1214 }
1215
1216 /**
1217  * gtk_tree_selection_select_range:
1218  * @selection: A #GtkTreeSelection.
1219  * @start_path: The initial node of the range.
1220  * @end_path: The final node of the range.
1221  *
1222  * Selects a range of nodes, determined by @start_path and @end_path inclusive.
1223  **/
1224 void
1225 gtk_tree_selection_select_range (GtkTreeSelection *selection,
1226                                  GtkTreePath      *start_path,
1227                                  GtkTreePath      *end_path)
1228 {
1229   g_return_if_fail (GTK_IS_TREE_SELECTION (selection));
1230   g_return_if_fail (selection->tree_view != NULL);
1231
1232   if (gtk_tree_selection_real_modify_range (selection, RANGE_SELECT, start_path, end_path))
1233     g_signal_emit (selection, tree_selection_signals[CHANGED], 0);
1234 }
1235
1236 /**
1237  * gtk_tree_selection_unselect_range:
1238  * @selection: A #GtkTreeSelection.
1239  * @start_path: The initial node of the range.
1240  * @end_path: The initial node of the range.
1241  *
1242  * Unselects a range of nodes, determined by @start_path and @end_path
1243  * inclusive.
1244  **/
1245 void
1246 gtk_tree_selection_unselect_range (GtkTreeSelection *selection,
1247                                    GtkTreePath      *start_path,
1248                                    GtkTreePath      *end_path)
1249 {
1250   g_return_if_fail (GTK_IS_TREE_SELECTION (selection));
1251   g_return_if_fail (selection->tree_view != NULL);
1252
1253   if (gtk_tree_selection_real_modify_range (selection, RANGE_UNSELECT, start_path, end_path))
1254     g_signal_emit (selection, tree_selection_signals[CHANGED], 0);
1255 }
1256
1257 /* Called internally by gtktreeview.c It handles actually selecting the tree.
1258  */
1259
1260 /*
1261  * docs about the 'override_browse_mode', we set this flag when we want to
1262  * unset select the node and override the select browse mode behaviour (that is
1263  * 'one node should *always* be selected').
1264  */
1265 void
1266 _gtk_tree_selection_internal_select_node (GtkTreeSelection *selection,
1267                                           GtkRBNode        *node,
1268                                           GtkRBTree        *tree,
1269                                           GtkTreePath      *path,
1270                                           GdkModifierType   state,
1271                                           gboolean          override_browse_mode)
1272 {
1273   gint flags;
1274   gint dirty = FALSE;
1275   GtkTreePath *anchor_path = NULL;
1276
1277   if (selection->type == GTK_SELECTION_NONE)
1278     return;
1279
1280   if (selection->tree_view->priv->anchor)
1281     anchor_path = gtk_tree_row_reference_get_path (selection->tree_view->priv->anchor);
1282
1283   if (selection->type == GTK_SELECTION_SINGLE ||
1284       selection->type == GTK_SELECTION_BROWSE)
1285     {
1286       /* just unselect */
1287       if (selection->type == GTK_SELECTION_BROWSE && override_browse_mode)
1288         {
1289           dirty = gtk_tree_selection_real_unselect_all (selection);
1290         }
1291       /* Did we try to select the same node again? */
1292       else if (selection->type == GTK_SELECTION_SINGLE &&
1293                anchor_path && gtk_tree_path_compare (path, anchor_path) == 0)
1294         {
1295           if ((state & GDK_CONTROL_MASK) == GDK_CONTROL_MASK)
1296             {
1297               dirty = gtk_tree_selection_real_unselect_all (selection);
1298             }
1299         }
1300       else
1301         {
1302           if (anchor_path)
1303             {
1304               /* We only want to select the new node if we can unselect the old one,
1305                * and we can select the new one. */
1306               if (selection->user_func)
1307                 {
1308                   if ((*selection->user_func) (selection, selection->tree_view->priv->model, path,
1309                                                GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_IS_SELECTED),
1310                                                selection->user_data))
1311                     dirty = TRUE;
1312                 }
1313               else
1314                 {
1315                   dirty = TRUE;
1316                 }
1317
1318               /* if dirty is FALSE, we weren't able to select the new one, otherwise, we try to
1319                * unselect the new one
1320                */
1321               if (dirty)
1322                 dirty = gtk_tree_selection_real_unselect_all (selection);
1323
1324               /* if dirty is TRUE at this point, we successfully unselected the
1325                * old one, and can then select the new one */
1326               if (dirty)
1327                 {
1328                   if (selection->tree_view->priv->anchor)
1329                     gtk_tree_row_reference_free (selection->tree_view->priv->anchor);
1330                   if (gtk_tree_selection_real_select_node (selection, tree, node, TRUE))
1331                     {
1332                       selection->tree_view->priv->anchor =
1333                         gtk_tree_row_reference_new_proxy (G_OBJECT (selection->tree_view), selection->tree_view->priv->model, path);
1334                     }
1335                 }
1336             }
1337           else
1338             {
1339               if (gtk_tree_selection_real_select_node (selection, tree, node, TRUE))
1340                 {
1341                   dirty = TRUE;
1342                   if (selection->tree_view->priv->anchor)
1343                     gtk_tree_row_reference_free (selection->tree_view->priv->anchor);
1344
1345                   selection->tree_view->priv->anchor =
1346                     gtk_tree_row_reference_new_proxy (G_OBJECT (selection->tree_view), selection->tree_view->priv->model, path);
1347                 }
1348             }
1349         }
1350     }
1351   else if (selection->type == GTK_SELECTION_MULTIPLE)
1352     {
1353       if (((state & GDK_SHIFT_MASK) == GDK_SHIFT_MASK) && (anchor_path == NULL))
1354         {
1355           if (selection->tree_view->priv->anchor)
1356             gtk_tree_row_reference_free (selection->tree_view->priv->anchor);
1357
1358           selection->tree_view->priv->anchor =
1359             gtk_tree_row_reference_new_proxy (G_OBJECT (selection->tree_view), selection->tree_view->priv->model, path);
1360           dirty = gtk_tree_selection_real_select_node (selection, tree, node, TRUE);
1361         }
1362       else if ((state & (GDK_CONTROL_MASK|GDK_SHIFT_MASK)) == (GDK_SHIFT_MASK|GDK_CONTROL_MASK))
1363         {
1364           gtk_tree_selection_select_range (selection,
1365                                            anchor_path,
1366                                            path);
1367         }
1368       else if ((state & GDK_CONTROL_MASK) == GDK_CONTROL_MASK)
1369         {
1370           flags = node->flags;
1371           if (selection->tree_view->priv->anchor)
1372             gtk_tree_row_reference_free (selection->tree_view->priv->anchor);
1373
1374           selection->tree_view->priv->anchor =
1375             gtk_tree_row_reference_new_proxy (G_OBJECT (selection->tree_view), selection->tree_view->priv->model, path);
1376
1377           if ((flags & GTK_RBNODE_IS_SELECTED) == GTK_RBNODE_IS_SELECTED)
1378             dirty |= gtk_tree_selection_real_select_node (selection, tree, node, FALSE);
1379           else
1380             dirty |= gtk_tree_selection_real_select_node (selection, tree, node, TRUE);
1381         }
1382       else if ((state & GDK_SHIFT_MASK) == GDK_SHIFT_MASK)
1383         {
1384           dirty = gtk_tree_selection_real_unselect_all (selection);
1385           dirty |= gtk_tree_selection_real_modify_range (selection,
1386                                                          RANGE_SELECT,
1387                                                          anchor_path,
1388                                                          path);
1389         }
1390       else
1391         {
1392           dirty = gtk_tree_selection_real_unselect_all (selection);
1393
1394           if (selection->tree_view->priv->anchor)
1395             gtk_tree_row_reference_free (selection->tree_view->priv->anchor);
1396
1397           selection->tree_view->priv->anchor =
1398             gtk_tree_row_reference_new_proxy (G_OBJECT (selection->tree_view), selection->tree_view->priv->model, path);
1399
1400           dirty |= gtk_tree_selection_real_select_node (selection, tree, node, TRUE);
1401         }
1402     }
1403
1404   if (anchor_path)
1405     gtk_tree_path_free (anchor_path);
1406
1407   if (dirty)
1408     g_signal_emit (selection, tree_selection_signals[CHANGED], 0);
1409 }
1410
1411 /* NOTE: Any {un,}selection ever done _MUST_ be done through this function!
1412  */
1413
1414 static gint
1415 gtk_tree_selection_real_select_node (GtkTreeSelection *selection,
1416                                      GtkRBTree        *tree,
1417                                      GtkRBNode        *node,
1418                                      gboolean          select)
1419 {
1420   gboolean selected = FALSE;
1421   GtkTreePath *path = NULL;
1422
1423   select = !! select;
1424
1425   if (GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_IS_SELECTED) != select)
1426     {
1427       path = _gtk_tree_view_find_path (selection->tree_view, tree, node);
1428       if (selection->user_func)
1429         {
1430           if ((*selection->user_func) (selection, selection->tree_view->priv->model, path,
1431                                        GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_IS_SELECTED),
1432                                        selection->user_data))
1433             selected = TRUE;
1434         }
1435       else
1436         selected = TRUE;
1437       gtk_tree_path_free (path);
1438     }
1439
1440   if (selected == TRUE)
1441     {
1442       node->flags ^= GTK_RBNODE_IS_SELECTED;
1443
1444       _gtk_tree_view_queue_draw_node (selection->tree_view, tree, node, NULL);
1445
1446       return TRUE;
1447     }
1448
1449   return FALSE;
1450 }
1451