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 "gtksignal.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 GtkType
  46 gtk_tree_selection_get_type (void)
  47 {
  48   static GtkType 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 = g_type_register_static (G_TYPE_OBJECT, "GtkTreeSelection", &selection_info, 0);
  66     }
  67
  68   return selection_type;
  69 }
  70
  71 static void
  72 gtk_tree_selection_class_init (GtkTreeSelectionClass *class)
  73 {
  74   GObjectClass *object_class;
  75
  76   object_class = (GObjectClass*) class;
  77   parent_class = g_type_class_peek_parent (class);
  78
  79   object_class->finalize = gtk_tree_selection_finalize;
  80   class->changed = NULL;
  81
  82   tree_selection_signals[CHANGED] =
  83     gtk_signal_new ("changed",
  84                     GTK_RUN_FIRST,
  85                     GTK_CLASS_TYPE (object_class),
  86                     GTK_SIGNAL_OFFSET (GtkTreeSelectionClass, changed),
  87                     gtk_marshal_VOID__VOID,
  88                     GTK_TYPE_NONE, 0);
  89 }
  90
  91 static void
  92 gtk_tree_selection_init (GtkTreeSelection *selection)
  93 {
  94   selection->type = GTK_SELECTION_SINGLE;
  95 }
  96
  97 static void
  98 gtk_tree_selection_finalize (GObject *object)
  99 {
 100   if (GTK_TREE_SELECTION (object)->destroy)
 101     (* GTK_TREE_SELECTION (object)->destroy) (GTK_TREE_SELECTION (object)->user_data);
 102
 103   /* chain parent_class' handler */
 104   G_OBJECT_CLASS (parent_class)->finalize (object);
 105 }
 106
 107 /**
 108  * _gtk_tree_selection_new:
 109  *
 110  * Creates a new #GtkTreeSelection object.  This function should not be invoked,
 111  * as each #GtkTreeView will create it's own #GtkTreeSelection.
 112  *
 113  * Return value: A newly created #GtkTreeSelection object.
 114  **/
 115 GtkTreeSelection*
 116 _gtk_tree_selection_new (void)
 117 {
 118   GtkTreeSelection *selection;
 119
 120   selection = GTK_TREE_SELECTION (g_object_new (GTK_TYPE_TREE_SELECTION, NULL));
 121
 122   return selection;
 123 }
 124
 125 /**
 126  * _gtk_tree_selection_new_with_tree_view:
 127  * @tree_view: The #GtkTreeView.
 128  *
 129  * Creates a new #GtkTreeSelection object.  This function should not be invoked,
 130  * as each #GtkTreeView will create it's own #GtkTreeSelection.
 131  *
 132  * Return value: A newly created #GtkTreeSelection object.
 133  **/
 134 GtkTreeSelection*
 135 _gtk_tree_selection_new_with_tree_view (GtkTreeView *tree_view)
 136 {
 137   GtkTreeSelection *selection;
 138
 139   g_return_val_if_fail (GTK_IS_TREE_VIEW (tree_view), NULL);
 140
 141   selection = _gtk_tree_selection_new ();
 142   _gtk_tree_selection_set_tree_view (selection, tree_view);
 143
 144   return selection;
 145 }
 146
 147 /**
 148  * _gtk_tree_selection_set_tree_view:
 149  * @selection: A #GtkTreeSelection.
 150  * @tree_view: The #GtkTreeView.
 151  *
 152  * Sets the #GtkTreeView of @selection.  This function should not be invoked, as
 153  * it is used internally by #GtkTreeView.
 154  **/
 155 void
 156 _gtk_tree_selection_set_tree_view (GtkTreeSelection *selection,
 157                                    GtkTreeView      *tree_view)
 158 {
 159   g_return_if_fail (GTK_IS_TREE_SELECTION (selection));
 160   if (tree_view != NULL)
 161     g_return_if_fail (GTK_IS_TREE_VIEW (tree_view));
 162
 163   selection->tree_view = tree_view;
 164 }
 165
 166 /**
 167  * gtk_tree_selection_set_mode:
 168  * @selection: A #GtkTreeSelection.
 169  * @type: The selection mode
 170  *
 171  * Sets the selection mode of the @selection.  If the previous type was
 172  * #GTK_SELECTION_MULTIPLE and, then the anchor is kept selected, if it was
 173  * previously selected.
 174  **/
 175 void
 176 gtk_tree_selection_set_mode (GtkTreeSelection *selection,
 177                              GtkSelectionMode  type)
 178 {
 179   g_return_if_fail (GTK_IS_TREE_SELECTION (selection));
 180
 181   if (selection->type == type)
 182     return;
 183
 184   if (type == GTK_SELECTION_SINGLE ||
 185       type == GTK_SELECTION_BROWSE)
 186     {
 187       GtkRBTree *tree = NULL;
 188       GtkRBNode *node = NULL;
 189       gint selected = FALSE;
 190
 191       if (selection->tree_view->priv->anchor)
 192         {
 193           GtkTreePath *anchor_path;
 194
 195           anchor_path = gtk_tree_row_reference_get_path (selection->tree_view->priv->anchor);
 196
 197           if (anchor_path)
 198             {
 199               _gtk_tree_view_find_node (selection->tree_view,
 200                                         anchor_path,
 201                                         &tree,
 202                                         &node);
 203
 204               if (node && GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_IS_SELECTED))
 205                 selected = TRUE;
 206
 207               gtk_tree_path_free (anchor_path);
 208             }
 209         }
 210       /* FIXME: if user_func is set, then it needs to unconditionally unselect
 211        * all.
 212        */
 213       gtk_tree_selection_unselect_all (selection);
 214
 215       /* FIXME are we properly emitting the selection_changed signal here? */
 216       if (node && selected)
 217         GTK_RBNODE_SET_FLAG (node, GTK_RBNODE_IS_SELECTED);
 218     }
 219   selection->type = type;
 220 }
 221
 222 /**
 223  * gtk_tree_selection_get_mode:
 224  * @selection: a #GtkTreeSelection
 225  *
 226  * Gets the selection mode for @selection. See
 227  * gtk_tree_selection_set_mode().
 228  *
 229  * Return value: the current selection mode
 230  **/
 231 GtkSelectionMode
 232 gtk_tree_selection_get_mode (GtkTreeSelection *selection)
 233 {
 234   g_return_val_if_fail (GTK_IS_TREE_SELECTION (selection), GTK_SELECTION_SINGLE);
 235
 236   return selection->type;
 237 }
 238
 239 /**
 240  * gtk_tree_selection_set_select_function:
 241  * @selection: A #GtkTreeSelection.
 242  * @func: The selection function.
 243  * @data: The selection function's data.
 244  * @destroy: The destroy function for user data.  May be NULL.
 245  *
 246  * Sets the selection function.  If set, this function is called before any node
 247  * is selected or unselected, giving some control over which nodes are selected.
 248  * The select function should return %TRUE if the state of the node may be toggled,
 249  * and %FALSE if the state of the node should be left unchanged.
 250  **/
 251 void
 252 gtk_tree_selection_set_select_function (GtkTreeSelection     *selection,
 253                                         GtkTreeSelectionFunc  func,
 254                                         gpointer              data,
 255                                         GtkDestroyNotify      destroy)
 256 {
 257   g_return_if_fail (GTK_IS_TREE_SELECTION (selection));
 258   g_return_if_fail (func != NULL);
 259
 260   selection->user_func = func;
 261   selection->user_data = data;
 262   selection->destroy = destroy;
 263 }
 264
 265 /**
 266  * gtk_tree_selection_get_user_data:
 267  * @selection: A #GtkTreeSelection.
 268  *
 269  * Returns the user data for the selection function.
 270  *
 271  * Return value: The user data.
 272  **/
 273 gpointer
 274 gtk_tree_selection_get_user_data (GtkTreeSelection *selection)
 275 {
 276   g_return_val_if_fail (GTK_IS_TREE_SELECTION (selection), NULL);
 277
 278   return selection->user_data;
 279 }
 280
 281 /**
 282  * gtk_tree_selection_get_tree_view:
 283  * @selection: A #GtkTreeSelection
 284  *
 285  * Returns the tree view associated with @selection.
 286  *
 287  * Return value: A #GtkTreeView
 288  **/
 289 GtkTreeView *
 290 gtk_tree_selection_get_tree_view (GtkTreeSelection *selection)
 291 {
 292   g_return_val_if_fail (GTK_IS_TREE_SELECTION (selection), NULL);
 293
 294   return selection->tree_view;
 295 }
 296
 297 /**
 298  * gtk_tree_selection_get_selected:
 299  * @selection: A #GtkTreeSelection.
 300  * @model: A pointer set to the #GtkTreeModel, or NULL.
 301  * @iter: The #GtkTreeIter, or NULL.
 302  *
 303  * Sets @iter to the currently selected node if @selection is set to
 304  * #GTK_SELECTION_SINGLE or #GTK_SELECTION_BROWSE.  @iter may be NULL if you
 305  * just want to test if @selection has any selected nodes.  @model is filled
 306  * with the current model as a convenience.  This function will not work if you
 307  * use @selection is #GTK_SELECTION_MULTIPLE.
 308  *
 309  * Return value: TRUE, if there is a selected node.
 310  **/
 311 gboolean
 312 gtk_tree_selection_get_selected (GtkTreeSelection  *selection,
 313                                  GtkTreeModel     **model,
 314                                  GtkTreeIter       *iter)
 315 {
 316   GtkRBTree *tree;
 317   GtkRBNode *node;
 318   GtkTreePath *anchor_path;
 319   gboolean retval;
 320
 321   g_return_val_if_fail (GTK_IS_TREE_SELECTION (selection), FALSE);
 322   g_return_val_if_fail (selection->type != GTK_SELECTION_MULTIPLE, FALSE);
 323   g_return_val_if_fail (selection->tree_view != NULL, FALSE);
 324   g_return_val_if_fail (selection->tree_view->priv->model != NULL, FALSE);
 325
 326   if (model)
 327     *model = selection->tree_view->priv->model;
 328
 329   if (selection->tree_view->priv->anchor == NULL)
 330     return FALSE;
 331
 332   anchor_path = gtk_tree_row_reference_get_path (selection->tree_view->priv->anchor);
 333
 334   if (anchor_path == NULL)
 335     return FALSE;
 336
 337   if (iter == NULL)
 338     {
 339       gtk_tree_path_free (anchor_path);
 340       return TRUE;
 341     }
 342
 343   retval = FALSE;
 344
 345   if (!_gtk_tree_view_find_node (selection->tree_view,
 346                                  anchor_path,
 347                                  &tree,
 348                                  &node) &&
 349       ! GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_IS_SELECTED))
 350     {
 351       /* We don't want to return the anchor if it isn't actually selected.
 352        */
 353       retval = FALSE;
 354     }
 355   else
 356     {
 357       retval = gtk_tree_model_get_iter (selection->tree_view->priv->model,
 358                                         iter,
 359                                         anchor_path);
 360     }
 361
 362   gtk_tree_path_free (anchor_path);
 363
 364   return retval;
 365 }
 366
 367 /**
 368  * gtk_tree_selection_selected_foreach:
 369  * @selection: A #GtkTreeSelection.
 370  * @func: The function to call for each selected node.
 371  * @data: user data to pass to the function.
 372  *
 373  * Calls a function for each selected node.
 374  **/
 375 void
 376 gtk_tree_selection_selected_foreach (GtkTreeSelection            *selection,
 377                                      GtkTreeSelectionForeachFunc  func,
 378                                      gpointer                     data)
 379 {
 380   GtkTreePath *path;
 381   GtkRBTree *tree;
 382   GtkRBNode *node;
 383   GtkTreeIter iter;
 384
 385   g_return_if_fail (GTK_IS_TREE_SELECTION (selection));
 386   g_return_if_fail (selection->tree_view != NULL);
 387   g_return_if_fail (selection->tree_view->priv->model != NULL);
 388
 389   if (func == NULL ||
 390       selection->tree_view->priv->tree == NULL ||
 391       selection->tree_view->priv->tree->root == NULL)
 392     return;
 393
 394   if (selection->type == GTK_SELECTION_SINGLE ||
 395       selection->type == GTK_SELECTION_BROWSE)
 396     {
 397       if (gtk_tree_row_reference_valid (selection->tree_view->priv->anchor))
 398         {
 399           path = gtk_tree_row_reference_get_path (selection->tree_view->priv->anchor);
 400           gtk_tree_model_get_iter (selection->tree_view->priv->model, &iter, path);
 401           (* func) (selection->tree_view->priv->model, path, &iter, data);
 402           gtk_tree_path_free (path);
 403         }
 404       return;
 405     }
 406
 407   tree = selection->tree_view->priv->tree;
 408   node = selection->tree_view->priv->tree->root;
 409
 410   while (node->left != tree->nil)
 411     node = node->left;
 412
 413   /* find the node internally */
 414   path = gtk_tree_path_new_root ();
 415   gtk_tree_model_get_iter (selection->tree_view->priv->model,
 416                            &iter, path);
 417
 418   do
 419     {
 420       if (GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_IS_SELECTED))
 421         (* func) (selection->tree_view->priv->model, path, &iter, data);
 422       if (node->children)
 423         {
 424           gboolean has_child;
 425           GtkTreeIter tmp;
 426
 427           tree = node->children;
 428           node = tree->root;
 429           while (node->left != tree->nil)
 430             node = node->left;
 431           tmp = iter;
 432           has_child = gtk_tree_model_iter_children (selection->tree_view->priv->model, &iter, &tmp);
 433           gtk_tree_path_append_index (path, 0);
 434           /* Sanity Check! */
 435           TREE_VIEW_INTERNAL_ASSERT_VOID (has_child);
 436         }
 437       else
 438         {
 439           gboolean done = FALSE;
 440           do
 441             {
 442               node = _gtk_rbtree_next (tree, node);
 443               if (node != NULL)
 444                 {
 445                   gboolean has_next;
 446
 447                   has_next = gtk_tree_model_iter_next (selection->tree_view->priv->model, &iter);
 448                   done = TRUE;
 449                   gtk_tree_path_next (path);
 450
 451                   /* Sanity Check! */
 452                   TREE_VIEW_INTERNAL_ASSERT_VOID (has_next);
 453                 }
 454               else
 455                 {
 456                   gboolean has_parent;
 457                   GtkTreeIter tmp_iter = iter;
 458
 459                   node = tree->parent_node;
 460                   tree = tree->parent_tree;
 461                   if (tree == NULL)
 462                     {
 463                       gtk_tree_path_free (path);
 464                       /* we've run out of tree */
 465                       /* We're done with this function */
 466                       return;
 467                     }
 468                   has_parent = gtk_tree_model_iter_parent (selection->tree_view->priv->model, &iter, &tmp_iter);
 469                   gtk_tree_path_up (path);
 470                   /* Sanity check */
 471                   TREE_VIEW_INTERNAL_ASSERT_VOID (has_parent);
 472                 }
 473             }
 474           while (!done);
 475         }
 476     }
 477   while (TRUE);
 478 }
 479
 480 /**
 481  * gtk_tree_selection_select_path:
 482  * @selection: A #GtkTreeSelection.
 483  * @path: The #GtkTreePath to be selected.
 484  *
 485  * Select the row at @path.
 486  **/
 487 void
 488 gtk_tree_selection_select_path (GtkTreeSelection *selection,
 489                                 GtkTreePath      *path)
 490 {
 491   GtkRBNode *node;
 492   GtkRBTree *tree;
 493   GdkModifierType state = 0;
 494
 495   g_return_if_fail (GTK_IS_TREE_SELECTION (selection));
 496   g_return_if_fail (selection->tree_view != NULL);
 497   g_return_if_fail (path != NULL);
 498
 499   _gtk_tree_view_find_node (selection->tree_view,
 500                             path,
 501                             &tree,
 502                             &node);
 503
 504   if (node == NULL || GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_IS_SELECTED))
 505     return;
 506
 507   if (selection->type == GTK_SELECTION_MULTIPLE)
 508     state = GDK_CONTROL_MASK;
 509
 510   _gtk_tree_selection_internal_select_node (selection,
 511                                             node,
 512                                             tree,
 513                                             path,
 514                                             state);
 515 }
 516
 517 /**
 518  * gtk_tree_selection_unselect_path:
 519  * @selection: A #GtkTreeSelection.
 520  * @path: The #GtkTreePath to be unselected.
 521  *
 522  * Unselects the row at @path.
 523  **/
 524 void
 525 gtk_tree_selection_unselect_path (GtkTreeSelection *selection,
 526                                   GtkTreePath      *path)
 527 {
 528   GtkRBNode *node;
 529   GtkRBTree *tree;
 530
 531   g_return_if_fail (GTK_IS_TREE_SELECTION (selection));
 532   g_return_if_fail (selection->tree_view != NULL);
 533   g_return_if_fail (path != NULL);
 534
 535   _gtk_tree_view_find_node (selection->tree_view,
 536                             path,
 537                             &tree,
 538                             &node);
 539
 540   if (node == NULL || !GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_IS_SELECTED))
 541     return;
 542
 543   _gtk_tree_selection_internal_select_node (selection,
 544                                             node,
 545                                             tree,
 546                                             path,
 547                                             GDK_CONTROL_MASK);
 548 }
 549
 550 /**
 551  * gtk_tree_selection_select_iter:
 552  * @selection: A #GtkTreeSelection.
 553  * @iter: The #GtkTreeIter to be selected.
 554  *
 555  * Selects the specified iterator.
 556  **/
 557 void
 558 gtk_tree_selection_select_iter (GtkTreeSelection *selection,
 559                                 GtkTreeIter      *iter)
 560 {
 561   GtkTreePath *path;
 562
 563   g_return_if_fail (GTK_IS_TREE_SELECTION (selection));
 564   g_return_if_fail (selection->tree_view != NULL);
 565   g_return_if_fail (selection->tree_view->priv->model != NULL);
 566   g_return_if_fail (iter != NULL);
 567
 568   path = gtk_tree_model_get_path (selection->tree_view->priv->model,
 569                                   iter);
 570
 571   if (path == NULL)
 572     return;
 573
 574   gtk_tree_selection_select_path (selection, path);
 575   gtk_tree_path_free (path);
 576 }
 577
 578
 579 /**
 580  * gtk_tree_selection_unselect_iter:
 581  * @selection: A #GtkTreeSelection.
 582  * @iter: The #GtkTreeIter to be unselected.
 583  *
 584  * Unselects the specified iterator.
 585  **/
 586 void
 587 gtk_tree_selection_unselect_iter (GtkTreeSelection *selection,
 588                                   GtkTreeIter      *iter)
 589 {
 590   GtkTreePath *path;
 591
 592   g_return_if_fail (GTK_IS_TREE_SELECTION (selection));
 593   g_return_if_fail (selection->tree_view != NULL);
 594   g_return_if_fail (selection->tree_view->priv->model != NULL);
 595   g_return_if_fail (iter != NULL);
 596
 597   path = gtk_tree_model_get_path (selection->tree_view->priv->model,
 598                                   iter);
 599
 600   if (path == NULL)
 601     return;
 602
 603   gtk_tree_selection_select_path (selection, path);
 604   gtk_tree_path_free (path);
 605 }
 606
 607 /* Wish I was in python, right now... */
 608 struct _TempTuple {
 609   GtkTreeSelection *selection;
 610   gint dirty;
 611 };
 612
 613 static void
 614 select_all_helper (GtkRBTree  *tree,
 615                    GtkRBNode  *node,
 616                    gpointer    data)
 617 {
 618   struct _TempTuple *tuple = data;
 619
 620   if (node->children)
 621     _gtk_rbtree_traverse (node->children,
 622                           node->children->root,
 623                           G_PRE_ORDER,
 624                           select_all_helper,
 625                           data);
 626   if (!GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_IS_SELECTED))
 627     {
 628       tuple->dirty = gtk_tree_selection_real_select_node (tuple->selection, tree, node, TRUE) || tuple->dirty;
 629     }
 630 }
 631
 632
 633 /* We have a real_{un,}select_all function that doesn't emit the signal, so we
 634  * can use it in other places without fear of the signal being emitted.
 635  */
 636 static gint
 637 gtk_tree_selection_real_select_all (GtkTreeSelection *selection)
 638 {
 639   struct _TempTuple *tuple;
 640
 641   if (selection->tree_view->priv->tree == NULL)
 642     return FALSE;
 643
 644   /* Mark all nodes selected */
 645   tuple = g_new (struct _TempTuple, 1);
 646   tuple->selection = selection;
 647   tuple->dirty = FALSE;
 648
 649   _gtk_rbtree_traverse (selection->tree_view->priv->tree,
 650                         selection->tree_view->priv->tree->root,
 651                         G_PRE_ORDER,
 652                         select_all_helper,
 653                         tuple);
 654   if (tuple->dirty)
 655     {
 656       g_free (tuple);
 657       return TRUE;
 658     }
 659   g_free (tuple);
 660   return FALSE;
 661 }
 662
 663 /**
 664  * gtk_tree_selection_select_all:
 665  * @selection: A #GtkTreeSelection.
 666  *
 667  * Selects all the nodes.  @selection is must be set to #GTK_SELECTION_MULTIPLE
 668  * mode.
 669  **/
 670 void
 671 gtk_tree_selection_select_all (GtkTreeSelection *selection)
 672 {
 673   g_return_if_fail (GTK_IS_TREE_SELECTION (selection));
 674   g_return_if_fail (selection->tree_view != NULL);
 675   if (selection->tree_view->priv->tree == NULL)
 676     return;
 677   g_return_if_fail (selection->type == GTK_SELECTION_MULTIPLE);
 678
 679   if (gtk_tree_selection_real_select_all (selection))
 680     g_signal_emit (G_OBJECT (selection), tree_selection_signals[CHANGED], 0);
 681 }
 682
 683 static void
 684 unselect_all_helper (GtkRBTree  *tree,
 685                      GtkRBNode  *node,
 686                      gpointer    data)
 687 {
 688   struct _TempTuple *tuple = data;
 689
 690   if (node->children)
 691     _gtk_rbtree_traverse (node->children,
 692                           node->children->root,
 693                           G_PRE_ORDER,
 694                           unselect_all_helper,
 695                           data);
 696   if (GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_IS_SELECTED))
 697     {
 698       tuple->dirty = gtk_tree_selection_real_select_node (tuple->selection, tree, node, FALSE) || tuple->dirty;
 699     }
 700 }
 701
 702 static gint
 703 gtk_tree_selection_real_unselect_all (GtkTreeSelection *selection)
 704 {
 705   struct _TempTuple *tuple;
 706
 707   if (selection->type == GTK_SELECTION_SINGLE ||
 708       selection->type == GTK_SELECTION_BROWSE)
 709     {
 710       GtkRBTree *tree = NULL;
 711       GtkRBNode *node = NULL;
 712       GtkTreePath *anchor_path;
 713
 714       if (selection->tree_view->priv->anchor == NULL)
 715         return FALSE;
 716
 717       anchor_path = gtk_tree_row_reference_get_path (selection->tree_view->priv->anchor);
 718
 719       if (anchor_path == NULL)
 720         return FALSE;
 721
 722       _gtk_tree_view_find_node (selection->tree_view,
 723                                 anchor_path,
 724                                 &tree,
 725                                 &node);
 726
 727       gtk_tree_path_free (anchor_path);
 728
 729       if (tree == NULL)
 730         return FALSE;
 731
 732       if (GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_IS_SELECTED))
 733         {
 734           if (gtk_tree_selection_real_select_node (selection, tree, node, FALSE))
 735             {
 736               gtk_tree_row_reference_free (selection->tree_view->priv->anchor);
 737               selection->tree_view->priv->anchor = NULL;
 738               return TRUE;
 739             }
 740         }
 741       return FALSE;
 742     }
 743   else
 744     {
 745       tuple = g_new (struct _TempTuple, 1);
 746       tuple->selection = selection;
 747       tuple->dirty = FALSE;
 748
 749       _gtk_rbtree_traverse (selection->tree_view->priv->tree,
 750                             selection->tree_view->priv->tree->root,
 751                             G_PRE_ORDER,
 752                             unselect_all_helper,
 753                             tuple);
 754
 755       if (tuple->dirty)
 756         {
 757           g_free (tuple);
 758           return TRUE;
 759         }
 760       g_free (tuple);
 761       return FALSE;
 762     }
 763 }
 764
 765 /**
 766  * gtk_tree_selection_unselect_all:
 767  * @selection: A #GtkTreeSelection.
 768  *
 769  * Unselects all the nodes.
 770  **/
 771 void
 772 gtk_tree_selection_unselect_all (GtkTreeSelection *selection)
 773 {
 774   g_return_if_fail (GTK_IS_TREE_SELECTION (selection));
 775   g_return_if_fail (selection->tree_view != NULL);
 776   if (selection->tree_view->priv->tree == NULL)
 777     return;
 778
 779   if (selection->tree_view->priv->tree == NULL)
 780     return;
 781
 782   if (gtk_tree_selection_real_unselect_all (selection))
 783     g_signal_emit (G_OBJECT (selection), tree_selection_signals[CHANGED], 0);
 784 }
 785
 786 static gint
 787 gtk_tree_selection_real_select_range (GtkTreeSelection *selection,
 788                                       GtkTreePath      *start_path,
 789                                       GtkTreePath      *end_path)
 790 {
 791   GtkRBNode *start_node, *end_node;
 792   GtkRBTree *start_tree, *end_tree;
 793   gboolean dirty = FALSE;
 794
 795   switch (gtk_tree_path_compare (start_path, end_path))
 796     {
 797     case 1:
 798       _gtk_tree_view_find_node (selection->tree_view,
 799                                 end_path,
 800                                 &start_tree,
 801                                 &start_node);
 802       _gtk_tree_view_find_node (selection->tree_view,
 803                                 start_path,
 804                                 &end_tree,
 805                                 &end_node);
 806       break;
 807     case 0:
 808       _gtk_tree_view_find_node (selection->tree_view,
 809                                 start_path,
 810                                 &start_tree,
 811                                 &start_node);
 812       end_tree = start_tree;
 813       end_node = start_node;
 814       break;
 815     case -1:
 816       _gtk_tree_view_find_node (selection->tree_view,
 817                                 start_path,
 818                                 &start_tree,
 819                                 &start_node);
 820       _gtk_tree_view_find_node (selection->tree_view,
 821                                 end_path,
 822                                 &end_tree,
 823                                 &end_node);
 824       break;
 825     }
 826
 827   g_return_val_if_fail (start_node != NULL, FALSE);
 828   g_return_val_if_fail (end_node != NULL, FALSE);
 829
 830   do
 831     {
 832       dirty |= gtk_tree_selection_real_select_node (selection, start_tree, start_node, TRUE);
 833
 834       if (start_node == end_node)
 835         break;
 836
 837       if (start_node->children)
 838         {
 839           start_tree = start_node->children;
 840           start_node = start_tree->root;
 841           while (start_node->left != start_tree->nil)
 842             start_node = start_node->left;
 843         }
 844       else
 845         {
 846           _gtk_rbtree_next_full (start_tree, start_node, &start_tree, &start_node);
 847           if (start_tree == NULL)
 848             {
 849               /* we just ran out of tree.  That means someone passed in bogus values.
 850                */
 851               return dirty;
 852             }
 853         }
 854     }
 855   while (TRUE);
 856
 857   return dirty;
 858 }
 859
 860 /**
 861  * gtk_tree_selection_select_range:
 862  * @selection: A #GtkTreeSelection.
 863  * @start_path: The initial node of the range.
 864  * @end_path: The final node of the range.
 865  *
 866  * Selects a range of nodes, determined by @start_path and @end_path inclusive.
 867  **/
 868 void
 869 gtk_tree_selection_select_range (GtkTreeSelection *selection,
 870                                  GtkTreePath      *start_path,
 871                                  GtkTreePath      *end_path)
 872 {
 873   g_return_if_fail (GTK_IS_TREE_SELECTION (selection));
 874   g_return_if_fail (selection->tree_view != NULL);
 875
 876   if (gtk_tree_selection_real_select_range (selection, start_path, end_path))
 877     g_signal_emit (G_OBJECT (selection), tree_selection_signals[CHANGED], 0);
 878 }
 879
 880 /* Called internally by gtktreeview.c It handles actually selecting the tree.
 881  */
 882 void
 883 _gtk_tree_selection_internal_select_node (GtkTreeSelection *selection,
 884                                           GtkRBNode        *node,
 885                                           GtkRBTree        *tree,
 886                                           GtkTreePath      *path,
 887                                           GdkModifierType   state)
 888 {
 889   gint flags;
 890   gint dirty = FALSE;
 891   GtkTreePath *anchor_path = NULL;
 892
 893
 894   if (selection->tree_view->priv->anchor)
 895     anchor_path = gtk_tree_row_reference_get_path (selection->tree_view->priv->anchor);
 896
 897   if (selection->type == GTK_SELECTION_SINGLE ||
 898       selection->type == GTK_SELECTION_BROWSE)
 899     {
 900       /* Did we try to select the same node again? */
 901       if (selection->type == GTK_SELECTION_SINGLE &&
 902           anchor_path && gtk_tree_path_compare (path, anchor_path) == 0)
 903         {
 904           if ((state & GDK_CONTROL_MASK) == GDK_CONTROL_MASK)
 905             {
 906               dirty = gtk_tree_selection_real_unselect_all (selection);
 907             }
 908         }
 909       else
 910         {
 911           /* FIXME: We only want to select the new node if we can unselect the
 912            * old one, and we can select the new one.  We are currently
 913            * unselecting the old one first, then trying the new one. */
 914           if (anchor_path)
 915             {
 916               dirty = gtk_tree_selection_real_unselect_all (selection);
 917               if (dirty)
 918                 {
 919                   if (selection->tree_view->priv->anchor)
 920                     gtk_tree_row_reference_free (selection->tree_view->priv->anchor);
 921                   if (gtk_tree_selection_real_select_node (selection, tree, node, TRUE))
 922                     {
 923                       selection->tree_view->priv->anchor =
 924                         gtk_tree_row_reference_new_proxy (G_OBJECT (selection->tree_view), selection->tree_view->priv->model, path);
 925                     }
 926                 }
 927             }
 928           else
 929             {
 930               if (gtk_tree_selection_real_select_node (selection, tree, node, TRUE))
 931                 {
 932                   dirty = TRUE;
 933                   selection->tree_view->priv->anchor =
 934                     gtk_tree_row_reference_new_proxy (G_OBJECT (selection->tree_view), selection->tree_view->priv->model, path);
 935                 }
 936             }
 937         }
 938     }
 939   else if (selection->type == GTK_SELECTION_MULTIPLE)
 940     {
 941       if (((state & GDK_SHIFT_MASK) == GDK_SHIFT_MASK) && (anchor_path == NULL))
 942         {
 943           if (selection->tree_view->priv->anchor)
 944             gtk_tree_row_reference_free (selection->tree_view->priv->anchor);
 945
 946           selection->tree_view->priv->anchor =
 947             gtk_tree_row_reference_new_proxy (G_OBJECT (selection->tree_view), selection->tree_view->priv->model, path);
 948           dirty = gtk_tree_selection_real_select_node (selection, tree, node, TRUE);
 949         }
 950       else if ((state & (GDK_CONTROL_MASK|GDK_SHIFT_MASK)) == (GDK_SHIFT_MASK|GDK_CONTROL_MASK))
 951         {
 952           gtk_tree_selection_select_range (selection,
 953                                            anchor_path,
 954                                            path);
 955         }
 956       else if ((state & GDK_CONTROL_MASK) == GDK_CONTROL_MASK)
 957         {
 958           flags = node->flags;
 959           if (selection->tree_view->priv->anchor)
 960             gtk_tree_row_reference_free (selection->tree_view->priv->anchor);
 961
 962           selection->tree_view->priv->anchor =
 963             gtk_tree_row_reference_new_proxy (G_OBJECT (selection->tree_view), selection->tree_view->priv->model, path);
 964
 965           if ((flags & GTK_RBNODE_IS_SELECTED) == GTK_RBNODE_IS_SELECTED)
 966             dirty |= gtk_tree_selection_real_select_node (selection, tree, node, FALSE);
 967           else
 968             dirty |= gtk_tree_selection_real_select_node (selection, tree, node, TRUE);
 969         }
 970       else if ((state & GDK_SHIFT_MASK) == GDK_SHIFT_MASK)
 971         {
 972           dirty = gtk_tree_selection_real_unselect_all (selection);
 973           dirty |= gtk_tree_selection_real_select_range (selection,
 974                                                          anchor_path,
 975                                                          path);
 976         }
 977       else
 978         {
 979           dirty = gtk_tree_selection_real_unselect_all (selection);
 980
 981           if (selection->tree_view->priv->anchor)
 982             gtk_tree_row_reference_free (selection->tree_view->priv->anchor);
 983
 984           selection->tree_view->priv->anchor =
 985             gtk_tree_row_reference_new_proxy (G_OBJECT (selection->tree_view), selection->tree_view->priv->model, path);
 986
 987           dirty |= gtk_tree_selection_real_select_node (selection, tree, node, TRUE);
 988         }
 989     }
 990
 991   if (anchor_path)
 992     gtk_tree_path_free (anchor_path);
 993
 994   if (dirty)
 995     g_signal_emit (G_OBJECT (selection), tree_selection_signals[CHANGED], 0);
 996 }
 997
 998 /* NOTE: Any {un,}selection ever done _MUST_ be done through this function!
 999  */
1000
1001 static gint
1002 gtk_tree_selection_real_select_node (GtkTreeSelection *selection,
1003                                      GtkRBTree        *tree,
1004                                      GtkRBNode        *node,
1005                                      gboolean          select)
1006 {
1007   gboolean selected = FALSE;
1008   GtkTreePath *path = NULL;
1009
1010   if (GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_IS_SELECTED) != select)
1011     {
1012       path = _gtk_tree_view_find_path (selection->tree_view, tree, node);
1013       if (selection->user_func)
1014         {
1015           if ((*selection->user_func) (selection, selection->tree_view->priv->model, path,
1016                                        GTK_RBNODE_FLAG_SET (node, GTK_RBNODE_IS_SELECTED),
1017                                        selection->user_data))
1018             selected = TRUE;
1019         }
1020       else
1021         selected = TRUE;
1022       gtk_tree_path_free (path);
1023     }
1024
1025   if (selected == TRUE)
1026     {
1027       node->flags ^= GTK_RBNODE_IS_SELECTED;
1028
1029       /* FIXME: just draw the one node*/
1030       gtk_widget_queue_draw (GTK_WIDGET (selection->tree_view));
1031       return TRUE;
1032     }
1033
1034   return FALSE;
1035 }
1036