2 * Copyright (C) 2000 Red Hat, Inc., Jonathan Blandford <jrb@redhat.com>
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.
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.
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.
24 #include <glib/gprintf.h>
25 #include <gobject/gvaluecollector.h>
26 #include "gtktreemodel.h"
27 #include "gtktreeview.h"
28 #include "gtktreeprivate.h"
29 #include "gtkmarshalers.h"
34 #define INITIALIZE_TREE_ITER(Iter) \
37 (Iter)->user_data = NULL; \
38 (Iter)->user_data2 = NULL; \
39 (Iter)->user_data3 = NULL; \
42 #define ROW_REF_DATA_STRING "gtk-tree-row-refs"
47 ROW_HAS_CHILD_TOGGLED,
53 static guint tree_model_signals[LAST_SIGNAL] = { 0 };
66 static void gtk_tree_model_base_init (gpointer g_class);
69 static void row_inserted_marshal (GClosure *closure,
70 GValue /* out */ *return_value,
72 const GValue *param_values,
73 gpointer invocation_hint,
74 gpointer marshal_data);
75 static void row_deleted_marshal (GClosure *closure,
76 GValue /* out */ *return_value,
78 const GValue *param_values,
79 gpointer invocation_hint,
80 gpointer marshal_data);
81 static void rows_reordered_marshal (GClosure *closure,
82 GValue /* out */ *return_value,
84 const GValue *param_values,
85 gpointer invocation_hint,
86 gpointer marshal_data);
88 static void gtk_tree_row_ref_inserted (RowRefList *refs,
91 static void gtk_tree_row_ref_deleted (RowRefList *refs,
93 static void gtk_tree_row_ref_reordered (RowRefList *refs,
99 gtk_tree_model_get_type (void)
101 static GType tree_model_type = 0;
103 if (! tree_model_type)
105 const GTypeInfo tree_model_info =
107 sizeof (GtkTreeModelIface), /* class_size */
108 gtk_tree_model_base_init, /* base_init */
109 NULL, /* base_finalize */
111 NULL, /* class_finalize */
112 NULL, /* class_data */
119 g_type_register_static (G_TYPE_INTERFACE, I_("GtkTreeModel"),
120 &tree_model_info, 0);
122 g_type_interface_add_prerequisite (tree_model_type, G_TYPE_OBJECT);
125 return tree_model_type;
129 gtk_tree_model_base_init (gpointer g_class)
131 static gboolean initialized = FALSE;
136 GType row_inserted_params[2];
137 GType row_deleted_params[1];
138 GType rows_reordered_params[3];
140 row_inserted_params[0] = GTK_TYPE_TREE_PATH | G_SIGNAL_TYPE_STATIC_SCOPE;
141 row_inserted_params[1] = GTK_TYPE_TREE_ITER;
143 row_deleted_params[0] = GTK_TYPE_TREE_PATH | G_SIGNAL_TYPE_STATIC_SCOPE;
145 rows_reordered_params[0] = GTK_TYPE_TREE_PATH | G_SIGNAL_TYPE_STATIC_SCOPE;
146 rows_reordered_params[1] = GTK_TYPE_TREE_ITER;
147 rows_reordered_params[2] = G_TYPE_POINTER;
150 * GtkTreeModel::row-changed:
151 * @tree_model: the #GtkTreeModel on which the signal is emitted
152 * @path: a #GtkTreePath identifying the changed row
153 * @iter: a valid #GtkTreeIter pointing to the changed row
155 * This signal is emitted when a row in the model has changed.
157 tree_model_signals[ROW_CHANGED] =
158 g_signal_new (I_("row_changed"),
161 G_STRUCT_OFFSET (GtkTreeModelIface, row_changed),
163 _gtk_marshal_VOID__BOXED_BOXED,
165 GTK_TYPE_TREE_PATH | G_SIGNAL_TYPE_STATIC_SCOPE,
168 /* We need to get notification about structure changes
169 * to update row references., so instead of using the
170 * standard g_signal_new() with an offset into our interface
171 * structure, we use a customs closures for the class
172 * closures (default handlers) that first update row references
173 * and then calls the function from the interface structure.
175 * The reason we don't simply update the row references from
176 * the wrapper functions (gtk_tree_model_row_inserted(), etc.)
177 * is to keep proper ordering with respect to signal handlers
178 * connected normally and after.
182 * GtkTreeModel::row-inserted:
183 * @tree_model: the #GtkTreeModel on which the signal is emitted
184 * @path: a #GtkTreePath identifying the new row
185 * @iter: a valid #GtkTreeIter pointing to the new row
187 * This signal is emitted when a new row has been inserted in the model.
189 * Note that the row may still be empty at this point, since
190 * it is a common pattern to first insert an empty row, and
191 * then fill it with the desired values.
193 closure = g_closure_new_simple (sizeof (GClosure), NULL);
194 g_closure_set_marshal (closure, row_inserted_marshal);
195 tree_model_signals[ROW_INSERTED] =
196 g_signal_newv (I_("row_inserted"),
201 _gtk_marshal_VOID__BOXED_BOXED,
203 row_inserted_params);
206 * GtkTreeModel::row-has-child-toggled:
207 * @tree_model: the #GtkTreeModel on which the signal is emitted
208 * @path: a #GtkTreePath identifying the row
209 * @iter: a valid #GtkTreeIter pointing to the row
211 * This signal is emitted when a row has gotten the first child row or lost
212 * its last child row.
214 tree_model_signals[ROW_HAS_CHILD_TOGGLED] =
215 g_signal_new (I_("row_has_child_toggled"),
218 G_STRUCT_OFFSET (GtkTreeModelIface, row_has_child_toggled),
220 _gtk_marshal_VOID__BOXED_BOXED,
222 GTK_TYPE_TREE_PATH | G_SIGNAL_TYPE_STATIC_SCOPE,
226 * GtkTreeModel::row-deleted:
227 * @tree_model: the #GtkTreeModel on which the signal is emitted
228 * @path: a #GtkTreePath identifying the row
230 * This signal is emitted when a row has been deleted.
232 * Note that no iterator is passed to the signal handler,
233 * since the row is already deleted.
235 * Implementations of GtkTreeModel must emit row-deleted
236 * <emphasis>before</emphasis> removing the node from its
237 * internal data structures. This is because models and
238 * views which access and monitor this model might have
239 * references on the node which need to be released in the
240 * row-deleted handler.
242 closure = g_closure_new_simple (sizeof (GClosure), NULL);
243 g_closure_set_marshal (closure, row_deleted_marshal);
244 tree_model_signals[ROW_DELETED] =
245 g_signal_newv (I_("row_deleted"),
250 _gtk_marshal_VOID__BOXED,
255 * GtkTreeModel::rows-reordered:
256 * @tree_model: the #GtkTreeModel on which the signal is emitted
257 * @path: a #GtkTreePath identifying the tree node whose children
258 * have been reordered
259 * @iter: a valid #GtkTreeIter pointing to the node whose
261 * This signal is emitted when the children of a node in the #GtkTreeModel
262 * have been reordered.
264 * Note that this signal is <emphasis>not</emphasis> emitted
265 * when rows are reordered by DND, since this is implemented
266 * by removing and then reinserting the row.
268 closure = g_closure_new_simple (sizeof (GClosure), NULL);
269 g_closure_set_marshal (closure, rows_reordered_marshal);
270 tree_model_signals[ROWS_REORDERED] =
271 g_signal_newv (I_("rows_reordered"),
276 _gtk_marshal_VOID__BOXED_BOXED_POINTER,
278 rows_reordered_params);
284 row_inserted_marshal (GClosure *closure,
285 GValue /* out */ *return_value,
286 guint n_param_values,
287 const GValue *param_values,
288 gpointer invocation_hint,
289 gpointer marshal_data)
291 GtkTreeModelIface *iface;
293 void (* row_inserted_callback) (GtkTreeModel *tree_model,
295 GtkTreeIter *iter) = NULL;
297 GObject *model = g_value_get_object (param_values + 0);
298 GtkTreePath *path = (GtkTreePath *)g_value_get_boxed (param_values + 1);
299 GtkTreeIter *iter = (GtkTreeIter *)g_value_get_boxed (param_values + 2);
301 /* first, we need to update internal row references */
302 gtk_tree_row_ref_inserted ((RowRefList *)g_object_get_data (model, ROW_REF_DATA_STRING),
305 /* fetch the interface ->row_inserted implementation */
306 iface = GTK_TREE_MODEL_GET_IFACE (model);
307 row_inserted_callback = G_STRUCT_MEMBER (gpointer, iface,
308 G_STRUCT_OFFSET (GtkTreeModelIface,
311 /* Call that default signal handler, it if has been set */
312 if (row_inserted_callback)
313 row_inserted_callback (GTK_TREE_MODEL (model), path, iter);
317 row_deleted_marshal (GClosure *closure,
318 GValue /* out */ *return_value,
319 guint n_param_values,
320 const GValue *param_values,
321 gpointer invocation_hint,
322 gpointer marshal_data)
324 GtkTreeModelIface *iface;
325 void (* row_deleted_callback) (GtkTreeModel *tree_model,
326 GtkTreePath *path) = NULL;
327 GObject *model = g_value_get_object (param_values + 0);
328 GtkTreePath *path = (GtkTreePath *)g_value_get_boxed (param_values + 1);
331 /* first, we need to update internal row references */
332 gtk_tree_row_ref_deleted ((RowRefList *)g_object_get_data (model, ROW_REF_DATA_STRING),
335 /* fetch the interface ->row_deleted implementation */
336 iface = GTK_TREE_MODEL_GET_IFACE (model);
337 row_deleted_callback = G_STRUCT_MEMBER (gpointer, iface,
338 G_STRUCT_OFFSET (GtkTreeModelIface,
341 /* Call that default signal handler, it if has been set */
342 if (row_deleted_callback)
343 row_deleted_callback (GTK_TREE_MODEL (model), path);
347 rows_reordered_marshal (GClosure *closure,
348 GValue /* out */ *return_value,
349 guint n_param_values,
350 const GValue *param_values,
351 gpointer invocation_hint,
352 gpointer marshal_data)
354 GtkTreeModelIface *iface;
355 void (* rows_reordered_callback) (GtkTreeModel *tree_model,
360 GObject *model = g_value_get_object (param_values + 0);
361 GtkTreePath *path = (GtkTreePath *)g_value_get_boxed (param_values + 1);
362 GtkTreeIter *iter = (GtkTreeIter *)g_value_get_boxed (param_values + 2);
363 gint *new_order = (gint *)g_value_get_pointer (param_values + 3);
365 /* first, we need to update internal row references */
366 gtk_tree_row_ref_reordered ((RowRefList *)g_object_get_data (model, ROW_REF_DATA_STRING),
367 path, iter, new_order);
369 /* fetch the interface ->rows_reordered implementation */
370 iface = GTK_TREE_MODEL_GET_IFACE (model);
371 rows_reordered_callback = G_STRUCT_MEMBER (gpointer, iface,
372 G_STRUCT_OFFSET (GtkTreeModelIface,
375 /* Call that default signal handler, it if has been set */
376 if (rows_reordered_callback)
377 rows_reordered_callback (GTK_TREE_MODEL (model), path, iter, new_order);
383 * Creates a new #GtkTreePath. This structure refers to a row.
385 * Return value: A newly created #GtkTreePath.
387 /* GtkTreePath Operations */
389 gtk_tree_path_new (void)
392 retval = g_new (GtkTreePath, 1);
394 retval->indices = NULL;
400 * gtk_tree_path_new_from_string:
401 * @path: The string representation of a path.
403 * Creates a new #GtkTreePath initialized to @path. @path is expected to be a
404 * colon separated list of numbers. For example, the string "10:4:0" would
405 * create a path of depth 3 pointing to the 11th child of the root node, the 5th
406 * child of that 11th child, and the 1st child of that 5th child. If an invalid
407 * path string is passed in, %NULL is returned.
409 * Return value: A newly-created #GtkTreePath, or %NULL
412 gtk_tree_path_new_from_string (const gchar *path)
415 const gchar *orig_path = path;
419 g_return_val_if_fail (path != NULL, NULL);
420 g_return_val_if_fail (*path != '\000', NULL);
422 retval = gtk_tree_path_new ();
426 i = strtol (path, &ptr, 10);
429 g_warning (G_STRLOC ": Negative numbers in path %s passed to gtk_tree_path_new_from_string", orig_path);
430 gtk_tree_path_free (retval);
434 gtk_tree_path_append_index (retval, i);
438 if (ptr == path || *ptr != ':')
440 g_warning (G_STRLOC ": Invalid path %s passed to gtk_tree_path_new_from_string", orig_path);
441 gtk_tree_path_free (retval);
451 * gtk_tree_path_new_from_indices:
452 * @first_index: first integer
453 * @varargs: list of integers terminated by -1
455 * Creates a new path with @first_index and @varargs as indices.
457 * Return value: A newly created #GtkTreePath.
462 gtk_tree_path_new_from_indices (gint first_index,
469 path = gtk_tree_path_new ();
471 va_start (args, first_index);
476 gtk_tree_path_append_index (path, arg);
477 arg = va_arg (args, gint);
486 * gtk_tree_path_to_string:
487 * @path: A #GtkTreePath
489 * Generates a string representation of the path. This string is a ':'
490 * separated list of numbers. For example, "4:10:0:3" would be an acceptable return value for this string.
492 * Return value: A newly-allocated string. Must be freed with g_free().
495 gtk_tree_path_to_string (GtkTreePath *path)
497 gchar *retval, *ptr, *end;
500 g_return_val_if_fail (path != NULL, NULL);
502 if (path->depth == 0)
505 n = path->depth * 12;
506 ptr = retval = g_new0 (gchar, n);
508 g_snprintf (retval, end - ptr, "%d", path->indices[0]);
509 while (*ptr != '\000')
512 for (i = 1; i < path->depth; i++)
514 g_snprintf (ptr, end - ptr, ":%d", path->indices[i]);
515 while (*ptr != '\000')
523 * gtk_tree_path_new_first:
525 * Creates a new #GtkTreePath. The string representation of this path is "0"
527 * Return value: A new #GtkTreePath.
530 gtk_tree_path_new_first (void)
534 retval = gtk_tree_path_new ();
535 gtk_tree_path_append_index (retval, 0);
541 * gtk_tree_path_append_index:
542 * @path: A #GtkTreePath.
543 * @index_: The index.
545 * Appends a new index to a path. As a result, the depth of the path is
549 gtk_tree_path_append_index (GtkTreePath *path,
552 g_return_if_fail (path != NULL);
553 g_return_if_fail (index >= 0);
556 path->indices = g_realloc (path->indices, path->depth * sizeof(gint));
557 path->indices[path->depth - 1] = index;
561 * gtk_tree_path_prepend_index:
562 * @path: A #GtkTreePath.
563 * @index_: The index.
565 * Prepends a new index to a path. As a result, the depth of the path is
569 gtk_tree_path_prepend_index (GtkTreePath *path,
575 new_indices = g_new (gint, path->depth);
577 if (path->indices == NULL)
579 path->indices = new_indices;
580 path->indices[0] = index;
583 memcpy (new_indices + 1, path->indices, (path->depth - 1)*sizeof (gint));
584 g_free (path->indices);
585 path->indices = new_indices;
586 path->indices[0] = index;
590 * gtk_tree_path_get_depth:
591 * @path: A #GtkTreePath.
593 * Returns the current depth of @path.
595 * Return value: The depth of @path
598 gtk_tree_path_get_depth (GtkTreePath *path)
600 g_return_val_if_fail (path != NULL, 0);
606 * gtk_tree_path_get_indices:
607 * @path: A #GtkTreePath.
609 * Returns the current indices of @path. This is an array of integers, each
610 * representing a node in a tree. This value should not be freed.
612 * Return value: The current indices, or %NULL.
615 gtk_tree_path_get_indices (GtkTreePath *path)
617 g_return_val_if_fail (path != NULL, NULL);
619 return path->indices;
623 * gtk_tree_path_free:
624 * @path: A #GtkTreePath.
629 gtk_tree_path_free (GtkTreePath *path)
634 g_free (path->indices);
639 * gtk_tree_path_copy:
640 * @path: A #GtkTreePath.
642 * Creates a new #GtkTreePath as a copy of @path.
644 * Return value: A new #GtkTreePath.
647 gtk_tree_path_copy (const GtkTreePath *path)
651 g_return_val_if_fail (path != NULL, NULL);
653 retval = g_new (GtkTreePath, 1);
654 retval->depth = path->depth;
655 retval->indices = g_new (gint, path->depth);
656 memcpy (retval->indices, path->indices, path->depth * sizeof (gint));
661 gtk_tree_path_get_type (void)
663 static GType our_type = 0;
666 our_type = g_boxed_type_register_static (I_("GtkTreePath"),
667 (GBoxedCopyFunc) gtk_tree_path_copy,
668 (GBoxedFreeFunc) gtk_tree_path_free);
674 * gtk_tree_path_compare:
675 * @a: A #GtkTreePath.
676 * @b: A #GtkTreePath to compare with.
678 * Compares two paths. If @a appears before @b in a tree, then -1 is returned.
679 * If @b appears before @a, then 1 is returned. If the two nodes are equal,
680 * then 0 is returned.
682 * Return value: The relative positions of @a and @b
685 gtk_tree_path_compare (const GtkTreePath *a,
686 const GtkTreePath *b)
690 g_return_val_if_fail (a != NULL, 0);
691 g_return_val_if_fail (b != NULL, 0);
692 g_return_val_if_fail (a->depth > 0, 0);
693 g_return_val_if_fail (b->depth > 0, 0);
697 if (a->indices[p] == b->indices[q])
699 return (a->indices[p] < b->indices[q]?-1:1);
701 while (++p < a->depth && ++q < b->depth);
702 if (a->depth == b->depth)
704 return (a->depth < b->depth?-1:1);
708 * gtk_tree_path_is_ancestor:
709 * @path: a #GtkTreePath
710 * @descendant: another #GtkTreePath
712 * Returns %TRUE if @descendant is a descendant of @path.
714 * Return value: %TRUE if @descendant is contained inside @path
717 gtk_tree_path_is_ancestor (GtkTreePath *path,
718 GtkTreePath *descendant)
722 g_return_val_if_fail (path != NULL, FALSE);
723 g_return_val_if_fail (descendant != NULL, FALSE);
725 /* can't be an ancestor if we're deeper */
726 if (path->depth >= descendant->depth)
730 while (i < path->depth)
732 if (path->indices[i] != descendant->indices[i])
741 * gtk_tree_path_is_descendant:
742 * @path: a #GtkTreePath
743 * @ancestor: another #GtkTreePath
745 * Returns %TRUE if @path is a descendant of @ancestor.
747 * Return value: %TRUE if @ancestor contains @path somewhere below it
750 gtk_tree_path_is_descendant (GtkTreePath *path,
751 GtkTreePath *ancestor)
755 g_return_val_if_fail (path != NULL, FALSE);
756 g_return_val_if_fail (ancestor != NULL, FALSE);
758 /* can't be a descendant if we're shallower in the tree */
759 if (path->depth <= ancestor->depth)
763 while (i < ancestor->depth)
765 if (path->indices[i] != ancestor->indices[i])
775 * gtk_tree_path_next:
776 * @path: A #GtkTreePath.
778 * Moves the @path to point to the next node at the current depth.
781 gtk_tree_path_next (GtkTreePath *path)
783 g_return_if_fail (path != NULL);
784 g_return_if_fail (path->depth > 0);
786 path->indices[path->depth - 1] ++;
790 * gtk_tree_path_prev:
791 * @path: A #GtkTreePath.
793 * Moves the @path to point to the previous node at the current depth,
796 * Return value: %TRUE if @path has a previous node, and the move was made.
799 gtk_tree_path_prev (GtkTreePath *path)
801 g_return_val_if_fail (path != NULL, FALSE);
803 if (path->depth == 0)
806 if (path->indices[path->depth - 1] == 0)
809 path->indices[path->depth - 1] -= 1;
816 * @path: A #GtkTreePath.
818 * Moves the @path to point to its parent node, if it has a parent.
820 * Return value: %TRUE if @path has a parent, and the move was made.
823 gtk_tree_path_up (GtkTreePath *path)
825 g_return_val_if_fail (path != NULL, FALSE);
827 if (path->depth == 0)
836 * gtk_tree_path_down:
837 * @path: A #GtkTreePath.
839 * Moves @path to point to the first child of the current path.
842 gtk_tree_path_down (GtkTreePath *path)
844 g_return_if_fail (path != NULL);
846 gtk_tree_path_append_index (path, 0);
850 * gtk_tree_iter_copy:
851 * @iter: A #GtkTreeIter.
853 * Creates a dynamically allocated tree iterator as a copy of @iter. This
854 * function is not intended for use in applications, because you can just copy
855 * the structs by value (<literal>GtkTreeIter new_iter = iter;</literal>). You
856 * must free this iter with gtk_tree_iter_free ().
858 * Return value: a newly-allocated copy of @iter.
861 gtk_tree_iter_copy (GtkTreeIter *iter)
865 g_return_val_if_fail (iter != NULL, NULL);
867 retval = g_new (GtkTreeIter, 1);
874 * gtk_tree_iter_free:
875 * @iter: A dynamically allocated tree iterator.
877 * Frees an iterator that has been allocated on the heap. This function is
878 * mainly used for language bindings.
881 gtk_tree_iter_free (GtkTreeIter *iter)
883 g_return_if_fail (iter != NULL);
889 gtk_tree_iter_get_type (void)
891 static GType our_type = 0;
894 our_type = g_boxed_type_register_static (I_("GtkTreeIter"),
895 (GBoxedCopyFunc) gtk_tree_iter_copy,
896 (GBoxedFreeFunc) gtk_tree_iter_free);
902 * gtk_tree_model_get_flags:
903 * @tree_model: A #GtkTreeModel.
905 * Returns a set of flags supported by this interface. The flags are a bitwise
906 * combination of #GtkTreeModelFlags. The flags supported should not change
907 * during the lifecycle of the @tree_model.
909 * Return value: The flags supported by this interface.
912 gtk_tree_model_get_flags (GtkTreeModel *tree_model)
914 GtkTreeModelIface *iface;
916 g_return_val_if_fail (GTK_IS_TREE_MODEL (tree_model), 0);
918 iface = GTK_TREE_MODEL_GET_IFACE (tree_model);
919 if (iface->get_flags)
920 return (* iface->get_flags) (tree_model);
926 * gtk_tree_model_get_n_columns:
927 * @tree_model: A #GtkTreeModel.
929 * Returns the number of columns supported by @tree_model.
931 * Return value: The number of columns.
934 gtk_tree_model_get_n_columns (GtkTreeModel *tree_model)
936 GtkTreeModelIface *iface;
937 g_return_val_if_fail (GTK_IS_TREE_MODEL (tree_model), 0);
939 iface = GTK_TREE_MODEL_GET_IFACE (tree_model);
940 g_return_val_if_fail (iface->get_n_columns != NULL, 0);
942 return (* iface->get_n_columns) (tree_model);
946 * gtk_tree_model_get_column_type:
947 * @tree_model: A #GtkTreeModel.
948 * @index_: The column index.
950 * Returns the type of the column.
952 * Return value: The type of the column.
955 gtk_tree_model_get_column_type (GtkTreeModel *tree_model,
958 GtkTreeModelIface *iface;
960 g_return_val_if_fail (GTK_IS_TREE_MODEL (tree_model), G_TYPE_INVALID);
962 iface = GTK_TREE_MODEL_GET_IFACE (tree_model);
963 g_return_val_if_fail (iface->get_column_type != NULL, G_TYPE_INVALID);
964 g_return_val_if_fail (index >= 0, G_TYPE_INVALID);
966 return (* iface->get_column_type) (tree_model, index);
970 * gtk_tree_model_get_iter:
971 * @tree_model: A #GtkTreeModel.
972 * @iter: The uninitialized #GtkTreeIter.
973 * @path: The #GtkTreePath.
975 * Sets @iter to a valid iterator pointing to @path.
977 * Return value: %TRUE, if @iter was set.
980 gtk_tree_model_get_iter (GtkTreeModel *tree_model,
984 GtkTreeModelIface *iface;
986 g_return_val_if_fail (GTK_IS_TREE_MODEL (tree_model), FALSE);
987 g_return_val_if_fail (iter != NULL, FALSE);
988 g_return_val_if_fail (path != NULL, FALSE);
990 iface = GTK_TREE_MODEL_GET_IFACE (tree_model);
991 g_return_val_if_fail (iface->get_iter != NULL, FALSE);
992 g_return_val_if_fail (path->depth > 0, FALSE);
994 INITIALIZE_TREE_ITER (iter);
996 return (* iface->get_iter) (tree_model, iter, path);
1000 * gtk_tree_model_get_iter_from_string:
1001 * @tree_model: A #GtkTreeModel.
1002 * @iter: An uninitialized #GtkTreeIter.
1003 * @path_string: A string representation of a #GtkTreePath.
1005 * Sets @iter to a valid iterator pointing to @path_string, if it
1006 * exists. Otherwise, @iter is left invalid and %FALSE is returned.
1008 * Return value: %TRUE, if @iter was set.
1011 gtk_tree_model_get_iter_from_string (GtkTreeModel *tree_model,
1013 const gchar *path_string)
1018 g_return_val_if_fail (GTK_IS_TREE_MODEL (tree_model), FALSE);
1019 g_return_val_if_fail (iter != NULL, FALSE);
1020 g_return_val_if_fail (path_string != NULL, FALSE);
1022 path = gtk_tree_path_new_from_string (path_string);
1024 g_return_val_if_fail (path != NULL, FALSE);
1026 retval = gtk_tree_model_get_iter (tree_model, iter, path);
1027 gtk_tree_path_free (path);
1033 * gtk_tree_model_get_string_from_iter:
1034 * @tree_model: A #GtkTreeModel.
1035 * @iter: An #GtkTreeIter.
1037 * Generates a string representation of the iter. This string is a ':'
1038 * separated list of numbers. For example, "4:10:0:3" would be an
1039 * acceptable return value for this string.
1041 * Return value: A newly-allocated string. Must be freed with g_free().
1046 gtk_tree_model_get_string_from_iter (GtkTreeModel *tree_model,
1052 g_return_val_if_fail (GTK_IS_TREE_MODEL (tree_model), NULL);
1053 g_return_val_if_fail (iter != NULL, NULL);
1055 path = gtk_tree_model_get_path (tree_model, iter);
1057 g_return_val_if_fail (path != NULL, NULL);
1059 ret = gtk_tree_path_to_string (path);
1060 gtk_tree_path_free (path);
1066 * gtk_tree_model_get_iter_first:
1067 * @tree_model: A #GtkTreeModel.
1068 * @iter: The uninitialized #GtkTreeIter.
1070 * Initializes @iter with the first iterator in the tree (the one at the path
1071 * "0") and returns %TRUE. Returns %FALSE if the tree is empty.
1073 * Return value: %TRUE, if @iter was set.
1076 gtk_tree_model_get_iter_first (GtkTreeModel *tree_model,
1082 g_return_val_if_fail (GTK_IS_TREE_MODEL (tree_model), FALSE);
1083 g_return_val_if_fail (iter != NULL, FALSE);
1085 path = gtk_tree_path_new_first ();
1086 retval = gtk_tree_model_get_iter (tree_model, iter, path);
1087 gtk_tree_path_free (path);
1093 * gtk_tree_model_get_path:
1094 * @tree_model: A #GtkTreeModel.
1095 * @iter: The #GtkTreeIter.
1097 * Returns a newly-created #GtkTreePath referenced by @iter. This path should
1098 * be freed with gtk_tree_path_free().
1100 * Return value: a newly-created #GtkTreePath.
1103 gtk_tree_model_get_path (GtkTreeModel *tree_model,
1106 GtkTreeModelIface *iface;
1108 g_return_val_if_fail (GTK_IS_TREE_MODEL (tree_model), NULL);
1109 g_return_val_if_fail (iter != NULL, NULL);
1111 iface = GTK_TREE_MODEL_GET_IFACE (tree_model);
1112 g_return_val_if_fail (iface->get_path != NULL, NULL);
1114 return (* iface->get_path) (tree_model, iter);
1118 * gtk_tree_model_get_value:
1119 * @tree_model: A #GtkTreeModel.
1120 * @iter: The #GtkTreeIter.
1121 * @column: The column to lookup the value at.
1122 * @value: An empty #GValue to set.
1124 * Sets initializes and sets @value to that at @column. When done with @value,
1125 * g_value_unset() needs to be called to free any allocated memory.
1128 gtk_tree_model_get_value (GtkTreeModel *tree_model,
1133 GtkTreeModelIface *iface;
1135 g_return_if_fail (GTK_IS_TREE_MODEL (tree_model));
1136 g_return_if_fail (iter != NULL);
1137 g_return_if_fail (value != NULL);
1139 iface = GTK_TREE_MODEL_GET_IFACE (tree_model);
1140 g_return_if_fail (iface->get_value != NULL);
1142 (* iface->get_value) (tree_model, iter, column, value);
1146 * gtk_tree_model_iter_next:
1147 * @tree_model: A #GtkTreeModel.
1148 * @iter: The #GtkTreeIter.
1150 * Sets @iter to point to the node following it at the current level. If there
1151 * is no next @iter, %FALSE is returned and @iter is set to be invalid.
1153 * Return value: %TRUE if @iter has been changed to the next node.
1156 gtk_tree_model_iter_next (GtkTreeModel *tree_model,
1159 GtkTreeModelIface *iface;
1161 g_return_val_if_fail (GTK_IS_TREE_MODEL (tree_model), FALSE);
1162 g_return_val_if_fail (iter != NULL, FALSE);
1164 iface = GTK_TREE_MODEL_GET_IFACE (tree_model);
1165 g_return_val_if_fail (iface->iter_next != NULL, FALSE);
1167 return (* iface->iter_next) (tree_model, iter);
1171 * gtk_tree_model_iter_children:
1172 * @tree_model: A #GtkTreeModel.
1173 * @iter: The new #GtkTreeIter to be set to the child.
1174 * @parent: The #GtkTreeIter, or %NULL
1176 * Sets @iter to point to the first child of @parent. If @parent has no
1177 * children, %FALSE is returned and @iter is set to be invalid. @parent
1178 * will remain a valid node after this function has been called.
1180 * If @parent is %NULL returns the first node, equivalent to
1181 * <literal>gtk_tree_model_get_iter_first (tree_model, iter);</literal>
1183 * Return value: %TRUE, if @child has been set to the first child.
1186 gtk_tree_model_iter_children (GtkTreeModel *tree_model,
1188 GtkTreeIter *parent)
1190 GtkTreeModelIface *iface;
1192 g_return_val_if_fail (GTK_IS_TREE_MODEL (tree_model), FALSE);
1193 g_return_val_if_fail (iter != NULL, FALSE);
1195 iface = GTK_TREE_MODEL_GET_IFACE (tree_model);
1196 g_return_val_if_fail (iface->iter_children != NULL, FALSE);
1198 INITIALIZE_TREE_ITER (iter);
1200 return (* iface->iter_children) (tree_model, iter, parent);
1204 * gtk_tree_model_iter_has_child:
1205 * @tree_model: A #GtkTreeModel.
1206 * @iter: The #GtkTreeIter to test for children.
1208 * Returns %TRUE if @iter has children, %FALSE otherwise.
1210 * Return value: %TRUE if @iter has children.
1213 gtk_tree_model_iter_has_child (GtkTreeModel *tree_model,
1216 GtkTreeModelIface *iface;
1218 g_return_val_if_fail (GTK_IS_TREE_MODEL (tree_model), FALSE);
1219 g_return_val_if_fail (iter != NULL, FALSE);
1221 iface = GTK_TREE_MODEL_GET_IFACE (tree_model);
1222 g_return_val_if_fail (iface->iter_has_child != NULL, FALSE);
1224 return (* iface->iter_has_child) (tree_model, iter);
1228 * gtk_tree_model_iter_n_children:
1229 * @tree_model: A #GtkTreeModel.
1230 * @iter: The #GtkTreeIter, or %NULL.
1232 * Returns the number of children that @iter has. As a special case, if @iter
1233 * is %NULL, then the number of toplevel nodes is returned.
1235 * Return value: The number of children of @iter.
1238 gtk_tree_model_iter_n_children (GtkTreeModel *tree_model,
1241 GtkTreeModelIface *iface;
1243 g_return_val_if_fail (GTK_IS_TREE_MODEL (tree_model), 0);
1245 iface = GTK_TREE_MODEL_GET_IFACE (tree_model);
1246 g_return_val_if_fail (iface->iter_n_children != NULL, 0);
1248 return (* iface->iter_n_children) (tree_model, iter);
1252 * gtk_tree_model_iter_nth_child:
1253 * @tree_model: A #GtkTreeModel.
1254 * @iter: The #GtkTreeIter to set to the nth child.
1255 * @parent: The #GtkTreeIter to get the child from, or %NULL.
1256 * @n: Then index of the desired child.
1258 * Sets @iter to be the child of @parent, using the given index. The first
1259 * index is 0. If @n is too big, or @parent has no children, @iter is set
1260 * to an invalid iterator and %FALSE is returned. @parent will remain a valid
1261 * node after this function has been called. As a special case, if @parent is
1262 * %NULL, then the @n<!-- -->th root node is set.
1264 * Return value: %TRUE, if @parent has an @n<!-- -->th child.
1267 gtk_tree_model_iter_nth_child (GtkTreeModel *tree_model,
1269 GtkTreeIter *parent,
1272 GtkTreeModelIface *iface;
1274 g_return_val_if_fail (GTK_IS_TREE_MODEL (tree_model), FALSE);
1275 g_return_val_if_fail (iter != NULL, FALSE);
1276 g_return_val_if_fail (n >= 0, FALSE);
1278 iface = GTK_TREE_MODEL_GET_IFACE (tree_model);
1279 g_return_val_if_fail (iface->iter_nth_child != NULL, FALSE);
1281 INITIALIZE_TREE_ITER (iter);
1283 return (* iface->iter_nth_child) (tree_model, iter, parent, n);
1287 * gtk_tree_model_iter_parent:
1288 * @tree_model: A #GtkTreeModel
1289 * @iter: The new #GtkTreeIter to set to the parent.
1290 * @child: The #GtkTreeIter.
1292 * Sets @iter to be the parent of @child. If @child is at the toplevel, and
1293 * doesn't have a parent, then @iter is set to an invalid iterator and %FALSE
1294 * is returned. @child will remain a valid node after this function has been
1297 * Return value: %TRUE, if @iter is set to the parent of @child.
1300 gtk_tree_model_iter_parent (GtkTreeModel *tree_model,
1304 GtkTreeModelIface *iface;
1306 g_return_val_if_fail (GTK_IS_TREE_MODEL (tree_model), FALSE);
1307 g_return_val_if_fail (iter != NULL, FALSE);
1308 g_return_val_if_fail (child != NULL, FALSE);
1310 iface = GTK_TREE_MODEL_GET_IFACE (tree_model);
1311 g_return_val_if_fail (iface->iter_parent != NULL, FALSE);
1313 INITIALIZE_TREE_ITER (iter);
1315 return (* iface->iter_parent) (tree_model, iter, child);
1319 * gtk_tree_model_ref_node:
1320 * @tree_model: A #GtkTreeModel.
1321 * @iter: The #GtkTreeIter.
1323 * Lets the tree ref the node. This is an optional method for models to
1324 * implement. To be more specific, models may ignore this call as it exists
1325 * primarily for performance reasons.
1327 * This function is primarily meant as a way for views to let caching model
1328 * know when nodes are being displayed (and hence, whether or not to cache that
1329 * node.) For example, a file-system based model would not want to keep the
1330 * entire file-hierarchy in memory, just the sections that are currently being
1331 * displayed by every current view.
1333 * A model should be expected to be able to get an iter independent of its
1337 gtk_tree_model_ref_node (GtkTreeModel *tree_model,
1340 GtkTreeModelIface *iface;
1342 g_return_if_fail (GTK_IS_TREE_MODEL (tree_model));
1344 iface = GTK_TREE_MODEL_GET_IFACE (tree_model);
1345 if (iface->ref_node)
1346 (* iface->ref_node) (tree_model, iter);
1350 * gtk_tree_model_unref_node:
1351 * @tree_model: A #GtkTreeModel.
1352 * @iter: The #GtkTreeIter.
1354 * Lets the tree unref the node. This is an optional method for models to
1355 * implement. To be more specific, models may ignore this call as it exists
1356 * primarily for performance reasons.
1358 * For more information on what this means, see gtk_tree_model_ref_node().
1359 * Please note that nodes that are deleted are not unreffed.
1362 gtk_tree_model_unref_node (GtkTreeModel *tree_model,
1365 GtkTreeModelIface *iface;
1367 g_return_if_fail (GTK_IS_TREE_MODEL (tree_model));
1368 g_return_if_fail (iter != NULL);
1370 iface = GTK_TREE_MODEL_GET_IFACE (tree_model);
1371 if (iface->unref_node)
1372 (* iface->unref_node) (tree_model, iter);
1376 * gtk_tree_model_get:
1377 * @tree_model: a #GtkTreeModel
1378 * @iter: a row in @tree_model
1379 * @Varargs: pairs of column number and value return locations, terminated by -1
1381 * Gets the value of one or more cells in the row referenced by @iter.
1382 * The variable argument list should contain integer column numbers,
1383 * each column number followed by a place to store the value being
1384 * retrieved. The list is terminated by a -1. For example, to get a
1385 * value from column 0 with type %G_TYPE_STRING, you would
1386 * write: <literal>gtk_tree_model_get (model, iter, 0, &place_string_here, -1)</literal>,
1387 * where <literal>place_string_here</literal> is a <type>gchar*</type> to be
1388 * filled with the string.
1389 * If appropriate, the returned values have to be freed or unreferenced.
1393 gtk_tree_model_get (GtkTreeModel *tree_model,
1399 g_return_if_fail (GTK_IS_TREE_MODEL (tree_model));
1400 g_return_if_fail (iter != NULL);
1402 va_start (var_args, iter);
1403 gtk_tree_model_get_valist (tree_model, iter, var_args);
1408 * gtk_tree_model_get_valist:
1409 * @tree_model: a #GtkTreeModel
1410 * @iter: a row in @tree_model
1411 * @var_args: <type>va_list</type> of column/return location pairs
1413 * See gtk_tree_model_get(), this version takes a <type>va_list</type>
1414 * for language bindings to use.
1417 gtk_tree_model_get_valist (GtkTreeModel *tree_model,
1423 g_return_if_fail (GTK_IS_TREE_MODEL (tree_model));
1424 g_return_if_fail (iter != NULL);
1426 column = va_arg (var_args, gint);
1428 while (column != -1)
1430 GValue value = { 0, };
1431 gchar *error = NULL;
1433 if (column >= gtk_tree_model_get_n_columns (tree_model))
1435 g_warning ("%s: Invalid column number %d accessed (remember to end your list of columns with a -1)", G_STRLOC, column);
1439 gtk_tree_model_get_value (GTK_TREE_MODEL (tree_model), iter, column, &value);
1441 G_VALUE_LCOPY (&value, var_args, 0, &error);
1444 g_warning ("%s: %s", G_STRLOC, error);
1447 /* we purposely leak the value here, it might not be
1448 * in a sane state if an error condition occoured
1453 g_value_unset (&value);
1455 column = va_arg (var_args, gint);
1460 * gtk_tree_model_row_changed:
1461 * @tree_model: A #GtkTreeModel
1462 * @path: A #GtkTreePath pointing to the changed row
1463 * @iter: A valid #GtkTreeIter pointing to the changed row
1465 * Emits the "row_changed" signal on @tree_model.
1468 gtk_tree_model_row_changed (GtkTreeModel *tree_model,
1472 g_return_if_fail (GTK_IS_TREE_MODEL (tree_model));
1473 g_return_if_fail (path != NULL);
1474 g_return_if_fail (iter != NULL);
1476 g_signal_emit (tree_model, tree_model_signals[ROW_CHANGED], 0, path, iter);
1480 * gtk_tree_model_row_inserted:
1481 * @tree_model: A #GtkTreeModel
1482 * @path: A #GtkTreePath pointing to the inserted row
1483 * @iter: A valid #GtkTreeIter pointing to the inserted row
1485 * Emits the "row_inserted" signal on @tree_model
1488 gtk_tree_model_row_inserted (GtkTreeModel *tree_model,
1492 g_return_if_fail (GTK_IS_TREE_MODEL (tree_model));
1493 g_return_if_fail (path != NULL);
1494 g_return_if_fail (iter != NULL);
1496 g_signal_emit (tree_model, tree_model_signals[ROW_INSERTED], 0, path, iter);
1500 * gtk_tree_model_row_has_child_toggled:
1501 * @tree_model: A #GtkTreeModel
1502 * @path: A #GtkTreePath pointing to the changed row
1503 * @iter: A valid #GtkTreeIter pointing to the changed row
1505 * Emits the "row_has_child_toggled" signal on @tree_model. This should be
1506 * called by models after the child state of a node changes.
1509 gtk_tree_model_row_has_child_toggled (GtkTreeModel *tree_model,
1513 g_return_if_fail (GTK_IS_TREE_MODEL (tree_model));
1514 g_return_if_fail (path != NULL);
1515 g_return_if_fail (iter != NULL);
1517 g_signal_emit (tree_model, tree_model_signals[ROW_HAS_CHILD_TOGGLED], 0, path, iter);
1521 * gtk_tree_model_row_deleted:
1522 * @tree_model: A #GtkTreeModel
1523 * @path: A #GtkTreePath pointing to the previous location of the deleted row.
1525 * Emits the "row_deleted" signal on @tree_model. This should be called by
1526 * models after a row has been removed. The location pointed to by @path
1527 * should be the location that the row previously was at. It may not be a
1528 * valid location anymore.
1531 gtk_tree_model_row_deleted (GtkTreeModel *tree_model,
1534 g_return_if_fail (GTK_IS_TREE_MODEL (tree_model));
1535 g_return_if_fail (path != NULL);
1537 g_signal_emit (tree_model, tree_model_signals[ROW_DELETED], 0, path);
1541 * gtk_tree_model_rows_reordered:
1542 * @tree_model: A #GtkTreeModel
1543 * @path: A #GtkTreePath pointing to the tree node whose children have been
1545 * @iter: A valid #GtkTreeIter pointing to the node whose children have been
1546 * reordered, or %NULL if the depth of @path is 0.
1547 * @new_order: an array of integers mapping the current position of each child
1548 * to its old position before the re-ordering,
1549 * i.e. @new_order<literal>[newpos] = oldpos</literal>.
1551 * Emits the "rows_reordered" signal on @tree_model. This should be called by
1552 * models when their rows have been reordered.
1555 gtk_tree_model_rows_reordered (GtkTreeModel *tree_model,
1560 g_return_if_fail (GTK_IS_TREE_MODEL (tree_model));
1561 g_return_if_fail (new_order != NULL);
1563 g_signal_emit (tree_model, tree_model_signals[ROWS_REORDERED], 0, path, iter, new_order);
1568 gtk_tree_model_foreach_helper (GtkTreeModel *model,
1571 GtkTreeModelForeachFunc func,
1578 if ((* func) (model, path, iter, user_data))
1581 if (gtk_tree_model_iter_children (model, &child, iter))
1583 gtk_tree_path_down (path);
1584 if (gtk_tree_model_foreach_helper (model, &child, path, func, user_data))
1586 gtk_tree_path_up (path);
1589 gtk_tree_path_next (path);
1591 while (gtk_tree_model_iter_next (model, iter));
1597 * gtk_tree_model_foreach:
1598 * @model: A #GtkTreeModel
1599 * @func: A function to be called on each row
1600 * @user_data: User data to passed to func.
1602 * Calls func on each node in model in a depth-first fashion.
1603 * If @func returns %TRUE, then the tree ceases to be walked, and
1604 * gtk_tree_model_foreach() returns.
1607 gtk_tree_model_foreach (GtkTreeModel *model,
1608 GtkTreeModelForeachFunc func,
1614 g_return_if_fail (GTK_IS_TREE_MODEL (model));
1615 g_return_if_fail (func != NULL);
1617 path = gtk_tree_path_new_first ();
1618 if (gtk_tree_model_get_iter (model, &iter, path) == FALSE)
1620 gtk_tree_path_free (path);
1624 gtk_tree_model_foreach_helper (model, &iter, path, func, user_data);
1625 gtk_tree_path_free (path);
1630 * GtkTreeRowReference
1633 static void gtk_tree_row_reference_unref_path (GtkTreePath *path,
1634 GtkTreeModel *model,
1639 gtk_tree_row_reference_get_type (void)
1641 static GType our_type = 0;
1644 our_type = g_boxed_type_register_static (I_("GtkTreeRowReference"),
1645 (GBoxedCopyFunc) gtk_tree_row_reference_copy,
1646 (GBoxedFreeFunc) gtk_tree_row_reference_free);
1652 struct _GtkTreeRowReference
1655 GtkTreeModel *model;
1661 release_row_references (gpointer data)
1663 RowRefList *refs = data;
1664 GSList *tmp_list = NULL;
1666 tmp_list = refs->list;
1667 while (tmp_list != NULL)
1669 GtkTreeRowReference *reference = tmp_list->data;
1671 if (reference->proxy == (GObject *)reference->model)
1672 reference->model = NULL;
1673 reference->proxy = NULL;
1675 /* we don't free the reference, users are responsible for that. */
1677 tmp_list = g_slist_next (tmp_list);
1680 g_slist_free (refs->list);
1685 gtk_tree_row_ref_inserted (RowRefList *refs,
1694 /* This function corrects the path stored in the reference to
1695 * account for an insertion. Note that it's called _after_ the insertion
1696 * with the path to the newly-inserted row. Which means that
1697 * the inserted path is in a different "coordinate system" than
1698 * the old path (e.g. if the inserted path was just before the old path,
1699 * then inserted path and old path will be the same, and old path must be
1703 tmp_list = refs->list;
1705 while (tmp_list != NULL)
1707 GtkTreeRowReference *reference = tmp_list->data;
1709 if (reference->path == NULL)
1712 if (reference->path->depth >= path->depth)
1715 gboolean ancestor = TRUE;
1717 for (i = 0; i < path->depth - 1; i ++)
1719 if (path->indices[i] != reference->path->indices[i])
1725 if (ancestor == FALSE)
1728 if (path->indices[path->depth-1] <= reference->path->indices[path->depth-1])
1729 reference->path->indices[path->depth-1] += 1;
1732 tmp_list = g_slist_next (tmp_list);
1737 gtk_tree_row_ref_deleted (RowRefList *refs,
1745 /* This function corrects the path stored in the reference to
1746 * account for an deletion. Note that it's called _after_ the
1747 * deletion with the old path of the just-deleted row. Which means
1748 * that the deleted path is the same now-defunct "coordinate system"
1749 * as the path saved in the reference, which is what we want to fix.
1752 tmp_list = refs->list;
1754 while (tmp_list != NULL)
1756 GtkTreeRowReference *reference = tmp_list->data;
1758 if (reference->path)
1762 if (path->depth > reference->path->depth)
1764 for (i = 0; i < path->depth - 1; i++)
1766 if (path->indices[i] != reference->path->indices[i])
1770 /* We know it affects us. */
1771 if (path->indices[i] == reference->path->indices[i])
1773 if (reference->path->depth > path->depth)
1774 /* some parent was deleted, trying to unref any node
1775 * between the deleted parent and the node the reference
1776 * is pointing to is bad, as those nodes are already gone.
1778 gtk_tree_row_reference_unref_path (reference->path, reference->model, path->depth - 1);
1780 gtk_tree_row_reference_unref_path (reference->path, reference->model, reference->path->depth - 1);
1781 gtk_tree_path_free (reference->path);
1782 reference->path = NULL;
1784 else if (path->indices[i] < reference->path->indices[i])
1786 reference->path->indices[path->depth-1]-=1;
1791 tmp_list = g_slist_next (tmp_list);
1796 gtk_tree_row_ref_reordered (RowRefList *refs,
1807 tmp_list = refs->list;
1809 while (tmp_list != NULL)
1811 GtkTreeRowReference *reference = tmp_list->data;
1813 length = gtk_tree_model_iter_n_children (GTK_TREE_MODEL (reference->model), iter);
1818 if ((reference->path) &&
1819 (gtk_tree_path_is_ancestor (path, reference->path)))
1821 gint ref_depth = gtk_tree_path_get_depth (reference->path);
1822 gint depth = gtk_tree_path_get_depth (path);
1824 if (ref_depth > depth)
1827 gint *indices = gtk_tree_path_get_indices (reference->path);
1829 for (i = 0; i < length; i++)
1831 if (new_order[i] == indices[depth])
1840 tmp_list = g_slist_next (tmp_list);
1844 /* We do this recursively so that we can unref children nodes before their parent */
1846 gtk_tree_row_reference_unref_path_helper (GtkTreePath *path,
1847 GtkTreeModel *model,
1848 GtkTreeIter *parent_iter,
1854 if (depth == current_depth)
1857 gtk_tree_model_iter_nth_child (model, &iter, parent_iter, path->indices[current_depth]);
1858 gtk_tree_row_reference_unref_path_helper (path, model, &iter, depth, current_depth + 1);
1859 gtk_tree_model_unref_node (model, &iter);
1863 gtk_tree_row_reference_unref_path (GtkTreePath *path,
1864 GtkTreeModel *model,
1872 gtk_tree_model_iter_nth_child (model, &iter, NULL, path->indices[0]);
1873 gtk_tree_row_reference_unref_path_helper (path, model, &iter, depth, 1);
1874 gtk_tree_model_unref_node (model, &iter);
1878 * gtk_tree_row_reference_new:
1879 * @model: A #GtkTreeModel
1880 * @path: A valid #GtkTreePath to monitor
1882 * Creates a row reference based on @path. This reference will keep pointing
1883 * to the node pointed to by @path, so long as it exists. It listens to all
1884 * signals emitted by @model, and updates its path appropriately. If @path
1885 * isn't a valid path in @model, then %NULL is returned.
1887 * Return value: A newly allocated #GtkTreeRowReference, or %NULL
1889 GtkTreeRowReference *
1890 gtk_tree_row_reference_new (GtkTreeModel *model,
1893 g_return_val_if_fail (GTK_IS_TREE_MODEL (model), NULL);
1894 g_return_val_if_fail (path != NULL, NULL);
1896 /* We use the model itself as the proxy object; and call
1897 * gtk_tree_row_reference_inserted(), etc, in the
1898 * class closure (default handler) marshalers for the signal.
1900 return gtk_tree_row_reference_new_proxy (G_OBJECT (model), model, path);
1904 * gtk_tree_row_reference_new_proxy:
1905 * @proxy: A proxy #GObject
1906 * @model: A #GtkTreeModel
1907 * @path: A valid #GtkTreePath to monitor
1909 * You do not need to use this function. Creates a row reference based on
1910 * @path. This reference will keep pointing to the node pointed to by @path,
1911 * so long as it exists. If @path isn't a valid path in @model, then %NULL is
1912 * returned. However, unlike references created with
1913 * gtk_tree_row_reference_new(), it does not listen to the model for changes.
1914 * The creator of the row reference must do this explicitly using
1915 * gtk_tree_row_reference_inserted(), gtk_tree_row_reference_deleted(),
1916 * gtk_tree_row_reference_reordered().
1918 * These functions must be called exactly once per proxy when the
1919 * corresponding signal on the model is emitted. This single call
1920 * updates all row references for that proxy. Since built-in GTK+
1921 * objects like #GtkTreeView already use this mechanism internally,
1922 * using them as the proxy object will produce unpredictable results.
1923 * Further more, passing the same object as @model and @proxy
1924 * doesn't work for reasons of internal implementation.
1926 * This type of row reference is primarily meant by structures that need to
1927 * carefully monitor exactly when a row reference updates itself, and is not
1928 * generally needed by most applications.
1930 * Return value: A newly allocated #GtkTreeRowReference, or %NULL
1932 GtkTreeRowReference *
1933 gtk_tree_row_reference_new_proxy (GObject *proxy,
1934 GtkTreeModel *model,
1937 GtkTreeRowReference *reference;
1939 GtkTreeIter parent_iter;
1942 g_return_val_if_fail (G_IS_OBJECT (proxy), NULL);
1943 g_return_val_if_fail (GTK_IS_TREE_MODEL (model), NULL);
1944 g_return_val_if_fail (path != NULL, NULL);
1945 g_return_val_if_fail (path->depth > 0, NULL);
1947 /* check that the path is valid */
1948 if (gtk_tree_model_get_iter (model, &parent_iter, path) == FALSE)
1951 /* Now we want to ref every node */
1952 gtk_tree_model_iter_nth_child (model, &parent_iter, NULL, path->indices[0]);
1953 gtk_tree_model_ref_node (model, &parent_iter);
1955 for (i = 1; i < path->depth; i++)
1958 gtk_tree_model_iter_nth_child (model, &iter, &parent_iter, path->indices[i]);
1959 gtk_tree_model_ref_node (model, &iter);
1963 /* Make the row reference */
1964 reference = g_new (GtkTreeRowReference, 1);
1966 g_object_ref (proxy);
1967 g_object_ref (model);
1968 reference->proxy = proxy;
1969 reference->model = model;
1970 reference->path = gtk_tree_path_copy (path);
1972 refs = g_object_get_data (G_OBJECT (proxy), ROW_REF_DATA_STRING);
1976 refs = g_new (RowRefList, 1);
1979 g_object_set_data_full (G_OBJECT (proxy),
1980 I_(ROW_REF_DATA_STRING),
1981 refs, release_row_references);
1984 refs->list = g_slist_prepend (refs->list, reference);
1990 * gtk_tree_row_reference_get_path:
1991 * @reference: A #GtkTreeRowReference
1993 * Returns a path that the row reference currently points to, or %NULL if the
1994 * path pointed to is no longer valid.
1996 * Return value: A current path, or %NULL.
1999 gtk_tree_row_reference_get_path (GtkTreeRowReference *reference)
2001 g_return_val_if_fail (reference != NULL, NULL);
2003 if (reference->proxy == NULL)
2006 if (reference->path == NULL)
2009 return gtk_tree_path_copy (reference->path);
2013 * gtk_tree_row_reference_get_model:
2014 * @reference: A #GtkTreeRowReference
2016 * Returns the model that the row reference is monitoring.
2018 * Return value: the model
2023 gtk_tree_row_reference_get_model (GtkTreeRowReference *reference)
2025 g_return_val_if_fail (reference != NULL, NULL);
2027 return reference->model;
2031 * gtk_tree_row_reference_valid:
2032 * @reference: A #GtkTreeRowReference, or %NULL
2034 * Returns %TRUE if the @reference is non-%NULL and refers to a current valid
2037 * Return value: %TRUE if @reference points to a valid path.
2040 gtk_tree_row_reference_valid (GtkTreeRowReference *reference)
2042 if (reference == NULL || reference->path == NULL)
2050 * gtk_tree_row_reference_copy:
2051 * @reference: a #GtkTreeRowReference
2053 * Copies a #GtkTreeRowReference.
2055 * Return value: a copy of @reference.
2059 GtkTreeRowReference *
2060 gtk_tree_row_reference_copy (GtkTreeRowReference *reference)
2062 return gtk_tree_row_reference_new_proxy (reference->proxy,
2068 * gtk_tree_row_reference_free:
2069 * @reference: A #GtkTreeRowReference, or %NULL
2071 * Free's @reference. @reference may be %NULL.
2074 gtk_tree_row_reference_free (GtkTreeRowReference *reference)
2078 if (reference == NULL)
2081 refs = g_object_get_data (G_OBJECT (reference->proxy), ROW_REF_DATA_STRING);
2085 g_warning (G_STRLOC": bad row reference, proxy has no outstanding row references");
2089 refs->list = g_slist_remove (refs->list, reference);
2091 if (refs->list == NULL)
2093 g_object_set_data (G_OBJECT (reference->proxy),
2094 I_(ROW_REF_DATA_STRING),
2098 if (reference->path)
2100 gtk_tree_row_reference_unref_path (reference->path, reference->model, reference->path->depth);
2101 gtk_tree_path_free (reference->path);
2104 g_object_unref (reference->proxy);
2105 g_object_unref (reference->model);
2110 * gtk_tree_row_reference_inserted:
2111 * @proxy: A #GObject
2112 * @path: The row position that was inserted
2114 * Lets a set of row reference created by gtk_tree_row_reference_new_proxy()
2115 * know that the model emitted the "row_inserted" signal.
2118 gtk_tree_row_reference_inserted (GObject *proxy,
2121 g_return_if_fail (G_IS_OBJECT (proxy));
2123 gtk_tree_row_ref_inserted ((RowRefList *)g_object_get_data (proxy, ROW_REF_DATA_STRING), path, NULL);
2127 * gtk_tree_row_reference_deleted:
2128 * @proxy: A #GObject
2129 * @path: The path position that was deleted
2131 * Lets a set of row reference created by gtk_tree_row_reference_new_proxy()
2132 * know that the model emitted the "row_deleted" signal.
2135 gtk_tree_row_reference_deleted (GObject *proxy,
2138 g_return_if_fail (G_IS_OBJECT (proxy));
2140 gtk_tree_row_ref_deleted ((RowRefList *)g_object_get_data (proxy, ROW_REF_DATA_STRING), path);
2144 * gtk_tree_row_reference_reordered:
2145 * @proxy: A #GObject
2146 * @path: The parent path of the reordered signal
2147 * @iter: The iter pointing to the parent of the reordered
2148 * @new_order: The new order of rows
2150 * Lets a set of row reference created by gtk_tree_row_reference_new_proxy()
2151 * know that the model emitted the "rows_reordered" signal.
2154 gtk_tree_row_reference_reordered (GObject *proxy,
2159 g_return_if_fail (G_IS_OBJECT (proxy));
2161 gtk_tree_row_ref_reordered ((RowRefList *)g_object_get_data (proxy, ROW_REF_DATA_STRING), path, iter, new_order);
2164 #define __GTK_TREE_MODEL_C__
2165 #include "gtkaliasdef.c"