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"
33 #define INITIALIZE_TREE_ITER(Iter) \
36 (Iter)->user_data = NULL; \
37 (Iter)->user_data2 = NULL; \
38 (Iter)->user_data3 = NULL; \
41 #define ROW_REF_DATA_STRING "gtk-tree-row-refs"
46 ROW_HAS_CHILD_TOGGLED,
52 static guint tree_model_signals[LAST_SIGNAL] = { 0 };
65 static void gtk_tree_model_base_init (gpointer g_class);
68 static void row_inserted_marshal (GClosure *closure,
69 GValue /* out */ *return_value,
71 const GValue *param_values,
72 gpointer invocation_hint,
73 gpointer marshal_data);
74 static void row_deleted_marshal (GClosure *closure,
75 GValue /* out */ *return_value,
77 const GValue *param_values,
78 gpointer invocation_hint,
79 gpointer marshal_data);
80 static void rows_reordered_marshal (GClosure *closure,
81 GValue /* out */ *return_value,
83 const GValue *param_values,
84 gpointer invocation_hint,
85 gpointer marshal_data);
87 static void gtk_tree_row_ref_inserted (RowRefList *refs,
90 static void gtk_tree_row_ref_deleted (RowRefList *refs,
92 static void gtk_tree_row_ref_reordered (RowRefList *refs,
98 gtk_tree_model_get_type (void)
100 static GType tree_model_type = 0;
102 if (! tree_model_type)
104 const GTypeInfo tree_model_info =
106 sizeof (GtkTreeModelIface), /* class_size */
107 gtk_tree_model_base_init, /* base_init */
108 NULL, /* base_finalize */
110 NULL, /* class_finalize */
111 NULL, /* class_data */
118 g_type_register_static (G_TYPE_INTERFACE, I_("GtkTreeModel"),
119 &tree_model_info, 0);
121 g_type_interface_add_prerequisite (tree_model_type, G_TYPE_OBJECT);
124 return tree_model_type;
128 gtk_tree_model_base_init (gpointer g_class)
130 static gboolean initialized = FALSE;
135 GType row_inserted_params[2];
136 GType row_deleted_params[1];
137 GType rows_reordered_params[3];
139 row_inserted_params[0] = GTK_TYPE_TREE_PATH | G_SIGNAL_TYPE_STATIC_SCOPE;
140 row_inserted_params[1] = GTK_TYPE_TREE_ITER;
142 row_deleted_params[0] = GTK_TYPE_TREE_PATH | G_SIGNAL_TYPE_STATIC_SCOPE;
144 rows_reordered_params[0] = GTK_TYPE_TREE_PATH | G_SIGNAL_TYPE_STATIC_SCOPE;
145 rows_reordered_params[1] = GTK_TYPE_TREE_ITER;
146 rows_reordered_params[2] = G_TYPE_POINTER;
149 * GtkTreeModel::row-changed:
150 * @tree_model: the #GtkTreeModel on which the signal is emitted
151 * @path: a #GtkTreePath identifying the changed row
152 * @iter: a valid #GtkTreeIter pointing to the changed row
154 * This signal is emitted when a row in the model has changed.
156 tree_model_signals[ROW_CHANGED] =
157 g_signal_new (I_("row-changed"),
160 G_STRUCT_OFFSET (GtkTreeModelIface, row_changed),
162 _gtk_marshal_VOID__BOXED_BOXED,
164 GTK_TYPE_TREE_PATH | G_SIGNAL_TYPE_STATIC_SCOPE,
167 /* We need to get notification about structure changes
168 * to update row references., so instead of using the
169 * standard g_signal_new() with an offset into our interface
170 * structure, we use a customs closures for the class
171 * closures (default handlers) that first update row references
172 * and then calls the function from the interface structure.
174 * The reason we don't simply update the row references from
175 * the wrapper functions (gtk_tree_model_row_inserted(), etc.)
176 * is to keep proper ordering with respect to signal handlers
177 * connected normally and after.
181 * GtkTreeModel::row-inserted:
182 * @tree_model: the #GtkTreeModel on which the signal is emitted
183 * @path: a #GtkTreePath identifying the new row
184 * @iter: a valid #GtkTreeIter pointing to the new row
186 * This signal is emitted when a new row has been inserted in the model.
188 * Note that the row may still be empty at this point, since
189 * it is a common pattern to first insert an empty row, and
190 * then fill it with the desired values.
192 closure = g_closure_new_simple (sizeof (GClosure), NULL);
193 g_closure_set_marshal (closure, row_inserted_marshal);
194 tree_model_signals[ROW_INSERTED] =
195 g_signal_newv (I_("row-inserted"),
200 _gtk_marshal_VOID__BOXED_BOXED,
202 row_inserted_params);
205 * GtkTreeModel::row-has-child-toggled:
206 * @tree_model: the #GtkTreeModel on which the signal is emitted
207 * @path: a #GtkTreePath identifying the row
208 * @iter: a valid #GtkTreeIter pointing to the row
210 * This signal is emitted when a row has gotten the first child row or lost
211 * its last child row.
213 tree_model_signals[ROW_HAS_CHILD_TOGGLED] =
214 g_signal_new (I_("row-has-child-toggled"),
217 G_STRUCT_OFFSET (GtkTreeModelIface, row_has_child_toggled),
219 _gtk_marshal_VOID__BOXED_BOXED,
221 GTK_TYPE_TREE_PATH | G_SIGNAL_TYPE_STATIC_SCOPE,
225 * GtkTreeModel::row-deleted:
226 * @tree_model: the #GtkTreeModel on which the signal is emitted
227 * @path: a #GtkTreePath identifying the row
229 * This signal is emitted when a row has been deleted.
231 * Note that no iterator is passed to the signal handler,
232 * since the row is already deleted.
234 * Implementations of GtkTreeModel must emit row-deleted
235 * <emphasis>before</emphasis> removing the node from its
236 * internal data structures. This is because models and
237 * views which access and monitor this model might have
238 * references on the node which need to be released in the
239 * row-deleted handler.
241 closure = g_closure_new_simple (sizeof (GClosure), NULL);
242 g_closure_set_marshal (closure, row_deleted_marshal);
243 tree_model_signals[ROW_DELETED] =
244 g_signal_newv (I_("row-deleted"),
249 _gtk_marshal_VOID__BOXED,
254 * GtkTreeModel::rows-reordered:
255 * @tree_model: the #GtkTreeModel on which the signal is emitted
256 * @path: a #GtkTreePath identifying the tree node whose children
257 * have been reordered
258 * @iter: a valid #GtkTreeIter pointing to the node whose
259 * @new_order: an array of integers mapping the current position of
260 * each child to its old position before the re-ordering,
261 * i.e. @new_order<literal>[newpos] = oldpos</literal>.
263 * This signal is emitted when the children of a node in the #GtkTreeModel
264 * have been reordered.
266 * Note that this signal is <emphasis>not</emphasis> emitted
267 * when rows are reordered by DND, since this is implemented
268 * by removing and then reinserting the row.
270 closure = g_closure_new_simple (sizeof (GClosure), NULL);
271 g_closure_set_marshal (closure, rows_reordered_marshal);
272 tree_model_signals[ROWS_REORDERED] =
273 g_signal_newv (I_("rows-reordered"),
278 _gtk_marshal_VOID__BOXED_BOXED_POINTER,
280 rows_reordered_params);
286 row_inserted_marshal (GClosure *closure,
287 GValue /* out */ *return_value,
288 guint n_param_values,
289 const GValue *param_values,
290 gpointer invocation_hint,
291 gpointer marshal_data)
293 GtkTreeModelIface *iface;
295 void (* row_inserted_callback) (GtkTreeModel *tree_model,
297 GtkTreeIter *iter) = NULL;
299 GObject *model = g_value_get_object (param_values + 0);
300 GtkTreePath *path = (GtkTreePath *)g_value_get_boxed (param_values + 1);
301 GtkTreeIter *iter = (GtkTreeIter *)g_value_get_boxed (param_values + 2);
303 /* first, we need to update internal row references */
304 gtk_tree_row_ref_inserted ((RowRefList *)g_object_get_data (model, ROW_REF_DATA_STRING),
307 /* fetch the interface ->row_inserted implementation */
308 iface = GTK_TREE_MODEL_GET_IFACE (model);
309 row_inserted_callback = G_STRUCT_MEMBER (gpointer, iface,
310 G_STRUCT_OFFSET (GtkTreeModelIface,
313 /* Call that default signal handler, it if has been set */
314 if (row_inserted_callback)
315 row_inserted_callback (GTK_TREE_MODEL (model), path, iter);
319 row_deleted_marshal (GClosure *closure,
320 GValue /* out */ *return_value,
321 guint n_param_values,
322 const GValue *param_values,
323 gpointer invocation_hint,
324 gpointer marshal_data)
326 GtkTreeModelIface *iface;
327 void (* row_deleted_callback) (GtkTreeModel *tree_model,
328 GtkTreePath *path) = NULL;
329 GObject *model = g_value_get_object (param_values + 0);
330 GtkTreePath *path = (GtkTreePath *)g_value_get_boxed (param_values + 1);
333 /* first, we need to update internal row references */
334 gtk_tree_row_ref_deleted ((RowRefList *)g_object_get_data (model, ROW_REF_DATA_STRING),
337 /* fetch the interface ->row_deleted implementation */
338 iface = GTK_TREE_MODEL_GET_IFACE (model);
339 row_deleted_callback = G_STRUCT_MEMBER (gpointer, iface,
340 G_STRUCT_OFFSET (GtkTreeModelIface,
343 /* Call that default signal handler, it if has been set */
344 if (row_deleted_callback)
345 row_deleted_callback (GTK_TREE_MODEL (model), path);
349 rows_reordered_marshal (GClosure *closure,
350 GValue /* out */ *return_value,
351 guint n_param_values,
352 const GValue *param_values,
353 gpointer invocation_hint,
354 gpointer marshal_data)
356 GtkTreeModelIface *iface;
357 void (* rows_reordered_callback) (GtkTreeModel *tree_model,
362 GObject *model = g_value_get_object (param_values + 0);
363 GtkTreePath *path = (GtkTreePath *)g_value_get_boxed (param_values + 1);
364 GtkTreeIter *iter = (GtkTreeIter *)g_value_get_boxed (param_values + 2);
365 gint *new_order = (gint *)g_value_get_pointer (param_values + 3);
367 /* first, we need to update internal row references */
368 gtk_tree_row_ref_reordered ((RowRefList *)g_object_get_data (model, ROW_REF_DATA_STRING),
369 path, iter, new_order);
371 /* fetch the interface ->rows_reordered implementation */
372 iface = GTK_TREE_MODEL_GET_IFACE (model);
373 rows_reordered_callback = G_STRUCT_MEMBER (gpointer, iface,
374 G_STRUCT_OFFSET (GtkTreeModelIface,
377 /* Call that default signal handler, it if has been set */
378 if (rows_reordered_callback)
379 rows_reordered_callback (GTK_TREE_MODEL (model), path, iter, new_order);
385 * Creates a new #GtkTreePath. This structure refers to a row.
387 * Return value: A newly created #GtkTreePath.
389 /* GtkTreePath Operations */
391 gtk_tree_path_new (void)
394 retval = g_slice_new (GtkTreePath);
396 retval->indices = NULL;
402 * gtk_tree_path_new_from_string:
403 * @path: The string representation of a path.
405 * Creates a new #GtkTreePath initialized to @path. @path is expected to be a
406 * colon separated list of numbers. For example, the string "10:4:0" would
407 * create a path of depth 3 pointing to the 11th child of the root node, the 5th
408 * child of that 11th child, and the 1st child of that 5th child. If an invalid
409 * path string is passed in, %NULL is returned.
411 * Return value: A newly-created #GtkTreePath, or %NULL
414 gtk_tree_path_new_from_string (const gchar *path)
417 const gchar *orig_path = path;
421 g_return_val_if_fail (path != NULL, NULL);
422 g_return_val_if_fail (*path != '\000', NULL);
424 retval = gtk_tree_path_new ();
428 i = strtol (path, &ptr, 10);
431 g_warning (G_STRLOC ": Negative numbers in path %s passed to gtk_tree_path_new_from_string", orig_path);
432 gtk_tree_path_free (retval);
436 gtk_tree_path_append_index (retval, i);
440 if (ptr == path || *ptr != ':')
442 g_warning (G_STRLOC ": Invalid path %s passed to gtk_tree_path_new_from_string", orig_path);
443 gtk_tree_path_free (retval);
453 * gtk_tree_path_new_from_indices:
454 * @first_index: first integer
455 * @varargs: list of integers terminated by -1
457 * Creates a new path with @first_index and @varargs as indices.
459 * Return value: A newly created #GtkTreePath.
464 gtk_tree_path_new_from_indices (gint first_index,
471 path = gtk_tree_path_new ();
473 va_start (args, first_index);
478 gtk_tree_path_append_index (path, arg);
479 arg = va_arg (args, gint);
488 * gtk_tree_path_to_string:
489 * @path: A #GtkTreePath
491 * Generates a string representation of the path. This string is a ':'
492 * separated list of numbers. For example, "4:10:0:3" would be an acceptable return value for this string.
494 * Return value: A newly-allocated string. Must be freed with g_free().
497 gtk_tree_path_to_string (GtkTreePath *path)
499 gchar *retval, *ptr, *end;
502 g_return_val_if_fail (path != NULL, NULL);
504 if (path->depth == 0)
507 n = path->depth * 12;
508 ptr = retval = g_new0 (gchar, n);
510 g_snprintf (retval, end - ptr, "%d", path->indices[0]);
511 while (*ptr != '\000')
514 for (i = 1; i < path->depth; i++)
516 g_snprintf (ptr, end - ptr, ":%d", path->indices[i]);
517 while (*ptr != '\000')
525 * gtk_tree_path_new_first:
527 * Creates a new #GtkTreePath. The string representation of this path is "0"
529 * Return value: A new #GtkTreePath.
532 gtk_tree_path_new_first (void)
536 retval = gtk_tree_path_new ();
537 gtk_tree_path_append_index (retval, 0);
543 * gtk_tree_path_append_index:
544 * @path: A #GtkTreePath.
545 * @index_: The index.
547 * Appends a new index to a path. As a result, the depth of the path is
551 gtk_tree_path_append_index (GtkTreePath *path,
554 g_return_if_fail (path != NULL);
555 g_return_if_fail (index >= 0);
558 path->indices = g_realloc (path->indices, path->depth * sizeof(gint));
559 path->indices[path->depth - 1] = index;
563 * gtk_tree_path_prepend_index:
564 * @path: A #GtkTreePath.
565 * @index_: The index.
567 * Prepends a new index to a path. As a result, the depth of the path is
571 gtk_tree_path_prepend_index (GtkTreePath *path,
577 new_indices = g_new (gint, path->depth);
579 if (path->indices == NULL)
581 path->indices = new_indices;
582 path->indices[0] = index;
585 memcpy (new_indices + 1, path->indices, (path->depth - 1)*sizeof (gint));
586 g_free (path->indices);
587 path->indices = new_indices;
588 path->indices[0] = index;
592 * gtk_tree_path_get_depth:
593 * @path: A #GtkTreePath.
595 * Returns the current depth of @path.
597 * Return value: The depth of @path
600 gtk_tree_path_get_depth (GtkTreePath *path)
602 g_return_val_if_fail (path != NULL, 0);
608 * gtk_tree_path_get_indices:
609 * @path: A #GtkTreePath.
611 * Returns the current indices of @path. This is an array of integers, each
612 * representing a node in a tree. This value should not be freed.
614 * Return value: The current indices, or %NULL.
617 gtk_tree_path_get_indices (GtkTreePath *path)
619 g_return_val_if_fail (path != NULL, NULL);
621 return path->indices;
625 * gtk_tree_path_get_indices_with_depth:
626 * @path: A #GtkTreePath.
627 * @depth: Number of elements returned in the integer array
629 * Returns the current indices of @path.
630 * This is an array of integers, each representing a node in a tree.
631 * It also returns the number of elements in the array.
632 * The array should not be freed.
634 * Return value: (array length=depth) (transfer none): The current indices, or %NULL.
639 gtk_tree_path_get_indices_with_depth (GtkTreePath *path, gint *depth)
641 g_return_val_if_fail (path != NULL, NULL);
644 *depth = path->depth;
646 return path->indices;
650 * gtk_tree_path_free:
651 * @path: A #GtkTreePath.
656 gtk_tree_path_free (GtkTreePath *path)
661 g_free (path->indices);
662 g_slice_free (GtkTreePath, path);
666 * gtk_tree_path_copy:
667 * @path: A #GtkTreePath.
669 * Creates a new #GtkTreePath as a copy of @path.
671 * Return value: A new #GtkTreePath.
674 gtk_tree_path_copy (const GtkTreePath *path)
678 g_return_val_if_fail (path != NULL, NULL);
680 retval = g_slice_new (GtkTreePath);
681 retval->depth = path->depth;
682 retval->indices = g_new (gint, path->depth);
683 memcpy (retval->indices, path->indices, path->depth * sizeof (gint));
687 G_DEFINE_BOXED_TYPE (GtkTreePath, gtk_tree_path,
692 * gtk_tree_path_compare:
693 * @a: A #GtkTreePath.
694 * @b: A #GtkTreePath to compare with.
696 * Compares two paths. If @a appears before @b in a tree, then -1 is returned.
697 * If @b appears before @a, then 1 is returned. If the two nodes are equal,
698 * then 0 is returned.
700 * Return value: The relative positions of @a and @b
703 gtk_tree_path_compare (const GtkTreePath *a,
704 const GtkTreePath *b)
708 g_return_val_if_fail (a != NULL, 0);
709 g_return_val_if_fail (b != NULL, 0);
710 g_return_val_if_fail (a->depth > 0, 0);
711 g_return_val_if_fail (b->depth > 0, 0);
715 if (a->indices[p] == b->indices[q])
717 return (a->indices[p] < b->indices[q]?-1:1);
719 while (++p < a->depth && ++q < b->depth);
720 if (a->depth == b->depth)
722 return (a->depth < b->depth?-1:1);
726 * gtk_tree_path_is_ancestor:
727 * @path: a #GtkTreePath
728 * @descendant: another #GtkTreePath
730 * Returns %TRUE if @descendant is a descendant of @path.
732 * Return value: %TRUE if @descendant is contained inside @path
735 gtk_tree_path_is_ancestor (GtkTreePath *path,
736 GtkTreePath *descendant)
740 g_return_val_if_fail (path != NULL, FALSE);
741 g_return_val_if_fail (descendant != NULL, FALSE);
743 /* can't be an ancestor if we're deeper */
744 if (path->depth >= descendant->depth)
748 while (i < path->depth)
750 if (path->indices[i] != descendant->indices[i])
759 * gtk_tree_path_is_descendant:
760 * @path: a #GtkTreePath
761 * @ancestor: another #GtkTreePath
763 * Returns %TRUE if @path is a descendant of @ancestor.
765 * Return value: %TRUE if @ancestor contains @path somewhere below it
768 gtk_tree_path_is_descendant (GtkTreePath *path,
769 GtkTreePath *ancestor)
773 g_return_val_if_fail (path != NULL, FALSE);
774 g_return_val_if_fail (ancestor != NULL, FALSE);
776 /* can't be a descendant if we're shallower in the tree */
777 if (path->depth <= ancestor->depth)
781 while (i < ancestor->depth)
783 if (path->indices[i] != ancestor->indices[i])
793 * gtk_tree_path_next:
794 * @path: A #GtkTreePath.
796 * Moves the @path to point to the next node at the current depth.
799 gtk_tree_path_next (GtkTreePath *path)
801 g_return_if_fail (path != NULL);
802 g_return_if_fail (path->depth > 0);
804 path->indices[path->depth - 1] ++;
808 * gtk_tree_path_prev:
809 * @path: A #GtkTreePath.
811 * Moves the @path to point to the previous node at the current depth,
814 * Return value: %TRUE if @path has a previous node, and the move was made.
817 gtk_tree_path_prev (GtkTreePath *path)
819 g_return_val_if_fail (path != NULL, FALSE);
821 if (path->depth == 0)
824 if (path->indices[path->depth - 1] == 0)
827 path->indices[path->depth - 1] -= 1;
834 * @path: A #GtkTreePath.
836 * Moves the @path to point to its parent node, if it has a parent.
838 * Return value: %TRUE if @path has a parent, and the move was made.
841 gtk_tree_path_up (GtkTreePath *path)
843 g_return_val_if_fail (path != NULL, FALSE);
845 if (path->depth == 0)
854 * gtk_tree_path_down:
855 * @path: A #GtkTreePath.
857 * Moves @path to point to the first child of the current path.
860 gtk_tree_path_down (GtkTreePath *path)
862 g_return_if_fail (path != NULL);
864 gtk_tree_path_append_index (path, 0);
868 * gtk_tree_iter_copy:
869 * @iter: A #GtkTreeIter.
871 * Creates a dynamically allocated tree iterator as a copy of @iter.
872 * This function is not intended for use in applications, because you
873 * can just copy the structs by value
874 * (<literal>GtkTreeIter new_iter = iter;</literal>).
875 * You must free this iter with gtk_tree_iter_free().
877 * Return value: a newly-allocated copy of @iter.
880 gtk_tree_iter_copy (GtkTreeIter *iter)
884 g_return_val_if_fail (iter != NULL, NULL);
886 retval = g_slice_new (GtkTreeIter);
893 * gtk_tree_iter_free:
894 * @iter: A dynamically allocated tree iterator.
896 * Frees an iterator that has been allocated by gtk_tree_iter_copy().
897 * This function is mainly used for language bindings.
900 gtk_tree_iter_free (GtkTreeIter *iter)
902 g_return_if_fail (iter != NULL);
904 g_slice_free (GtkTreeIter, iter);
907 G_DEFINE_BOXED_TYPE (GtkTreeIter, gtk_tree_iter,
912 * gtk_tree_model_get_flags:
913 * @tree_model: A #GtkTreeModel.
915 * Returns a set of flags supported by this interface. The flags are a bitwise
916 * combination of #GtkTreeModelFlags. The flags supported should not change
917 * during the lifecycle of the @tree_model.
919 * Return value: The flags supported by this interface.
922 gtk_tree_model_get_flags (GtkTreeModel *tree_model)
924 GtkTreeModelIface *iface;
926 g_return_val_if_fail (GTK_IS_TREE_MODEL (tree_model), 0);
928 iface = GTK_TREE_MODEL_GET_IFACE (tree_model);
929 if (iface->get_flags)
930 return (* iface->get_flags) (tree_model);
936 * gtk_tree_model_get_n_columns:
937 * @tree_model: A #GtkTreeModel.
939 * Returns the number of columns supported by @tree_model.
941 * Return value: The number of columns.
944 gtk_tree_model_get_n_columns (GtkTreeModel *tree_model)
946 GtkTreeModelIface *iface;
947 g_return_val_if_fail (GTK_IS_TREE_MODEL (tree_model), 0);
949 iface = GTK_TREE_MODEL_GET_IFACE (tree_model);
950 g_return_val_if_fail (iface->get_n_columns != NULL, 0);
952 return (* iface->get_n_columns) (tree_model);
956 * gtk_tree_model_get_column_type:
957 * @tree_model: A #GtkTreeModel.
958 * @index_: The column index.
960 * Returns the type of the column.
962 * Return value: (transfer none): The type of the column.
965 gtk_tree_model_get_column_type (GtkTreeModel *tree_model,
968 GtkTreeModelIface *iface;
970 g_return_val_if_fail (GTK_IS_TREE_MODEL (tree_model), G_TYPE_INVALID);
972 iface = GTK_TREE_MODEL_GET_IFACE (tree_model);
973 g_return_val_if_fail (iface->get_column_type != NULL, G_TYPE_INVALID);
974 g_return_val_if_fail (index >= 0, G_TYPE_INVALID);
976 return (* iface->get_column_type) (tree_model, index);
980 * gtk_tree_model_get_iter:
981 * @tree_model: A #GtkTreeModel.
982 * @iter: (out): The uninitialized #GtkTreeIter.
983 * @path: The #GtkTreePath.
985 * Sets @iter to a valid iterator pointing to @path.
987 * Return value: %TRUE, if @iter was set.
990 gtk_tree_model_get_iter (GtkTreeModel *tree_model,
994 GtkTreeModelIface *iface;
996 g_return_val_if_fail (GTK_IS_TREE_MODEL (tree_model), FALSE);
997 g_return_val_if_fail (iter != NULL, FALSE);
998 g_return_val_if_fail (path != NULL, FALSE);
1000 iface = GTK_TREE_MODEL_GET_IFACE (tree_model);
1001 g_return_val_if_fail (iface->get_iter != NULL, FALSE);
1002 g_return_val_if_fail (path->depth > 0, FALSE);
1004 INITIALIZE_TREE_ITER (iter);
1006 return (* iface->get_iter) (tree_model, iter, path);
1010 * gtk_tree_model_get_iter_from_string:
1011 * @tree_model: A #GtkTreeModel.
1012 * @iter: (out): An uninitialized #GtkTreeIter.
1013 * @path_string: A string representation of a #GtkTreePath.
1015 * Sets @iter to a valid iterator pointing to @path_string, if it
1016 * exists. Otherwise, @iter is left invalid and %FALSE is returned.
1018 * Return value: %TRUE, if @iter was set.
1021 gtk_tree_model_get_iter_from_string (GtkTreeModel *tree_model,
1023 const gchar *path_string)
1028 g_return_val_if_fail (GTK_IS_TREE_MODEL (tree_model), FALSE);
1029 g_return_val_if_fail (iter != NULL, FALSE);
1030 g_return_val_if_fail (path_string != NULL, FALSE);
1032 path = gtk_tree_path_new_from_string (path_string);
1034 g_return_val_if_fail (path != NULL, FALSE);
1036 retval = gtk_tree_model_get_iter (tree_model, iter, path);
1037 gtk_tree_path_free (path);
1043 * gtk_tree_model_get_string_from_iter:
1044 * @tree_model: A #GtkTreeModel.
1045 * @iter: An #GtkTreeIter.
1047 * Generates a string representation of the iter. This string is a ':'
1048 * separated list of numbers. For example, "4:10:0:3" would be an
1049 * acceptable return value for this string.
1051 * Return value: A newly-allocated string. Must be freed with g_free().
1056 gtk_tree_model_get_string_from_iter (GtkTreeModel *tree_model,
1062 g_return_val_if_fail (GTK_IS_TREE_MODEL (tree_model), NULL);
1063 g_return_val_if_fail (iter != NULL, NULL);
1065 path = gtk_tree_model_get_path (tree_model, iter);
1067 g_return_val_if_fail (path != NULL, NULL);
1069 ret = gtk_tree_path_to_string (path);
1070 gtk_tree_path_free (path);
1076 * gtk_tree_model_get_iter_first:
1077 * @tree_model: A #GtkTreeModel.
1078 * @iter: (out): The uninitialized #GtkTreeIter.
1080 * Initializes @iter with the first iterator in the tree (the one at the path
1081 * "0") and returns %TRUE. Returns %FALSE if the tree is empty.
1083 * Return value: %TRUE, if @iter was set.
1086 gtk_tree_model_get_iter_first (GtkTreeModel *tree_model,
1092 g_return_val_if_fail (GTK_IS_TREE_MODEL (tree_model), FALSE);
1093 g_return_val_if_fail (iter != NULL, FALSE);
1095 path = gtk_tree_path_new_first ();
1096 retval = gtk_tree_model_get_iter (tree_model, iter, path);
1097 gtk_tree_path_free (path);
1103 * gtk_tree_model_get_path:
1104 * @tree_model: A #GtkTreeModel.
1105 * @iter: The #GtkTreeIter.
1107 * Returns a newly-created #GtkTreePath referenced by @iter. This path should
1108 * be freed with gtk_tree_path_free().
1110 * Return value: a newly-created #GtkTreePath.
1113 gtk_tree_model_get_path (GtkTreeModel *tree_model,
1116 GtkTreeModelIface *iface;
1118 g_return_val_if_fail (GTK_IS_TREE_MODEL (tree_model), NULL);
1119 g_return_val_if_fail (iter != NULL, NULL);
1121 iface = GTK_TREE_MODEL_GET_IFACE (tree_model);
1122 g_return_val_if_fail (iface->get_path != NULL, NULL);
1124 return (* iface->get_path) (tree_model, iter);
1128 * gtk_tree_model_get_value:
1129 * @tree_model: A #GtkTreeModel.
1130 * @iter: The #GtkTreeIter.
1131 * @column: The column to lookup the value at.
1132 * @value: (out) (transfer none): An empty #GValue to set.
1134 * Initializes and sets @value to that at @column.
1135 * When done with @value, g_value_unset() needs to be called
1136 * to free any allocated memory.
1139 gtk_tree_model_get_value (GtkTreeModel *tree_model,
1144 GtkTreeModelIface *iface;
1146 g_return_if_fail (GTK_IS_TREE_MODEL (tree_model));
1147 g_return_if_fail (iter != NULL);
1148 g_return_if_fail (value != NULL);
1150 iface = GTK_TREE_MODEL_GET_IFACE (tree_model);
1151 g_return_if_fail (iface->get_value != NULL);
1153 (* iface->get_value) (tree_model, iter, column, value);
1157 * gtk_tree_model_iter_next:
1158 * @tree_model: A #GtkTreeModel.
1159 * @iter: (in): The #GtkTreeIter.
1161 * Sets @iter to point to the node following it at the current level. If there
1162 * is no next @iter, %FALSE is returned and @iter is set to be invalid.
1164 * Return value: %TRUE if @iter has been changed to the next node.
1167 gtk_tree_model_iter_next (GtkTreeModel *tree_model,
1170 GtkTreeModelIface *iface;
1172 g_return_val_if_fail (GTK_IS_TREE_MODEL (tree_model), FALSE);
1173 g_return_val_if_fail (iter != NULL, FALSE);
1175 iface = GTK_TREE_MODEL_GET_IFACE (tree_model);
1176 g_return_val_if_fail (iface->iter_next != NULL, FALSE);
1178 return (* iface->iter_next) (tree_model, iter);
1182 * gtk_tree_model_iter_children:
1183 * @tree_model: A #GtkTreeModel.
1184 * @iter: (out): The new #GtkTreeIter to be set to the child.
1185 * @parent: (allow-none): The #GtkTreeIter, or %NULL
1187 * Sets @iter to point to the first child of @parent. If @parent has no
1188 * children, %FALSE is returned and @iter is set to be invalid. @parent
1189 * will remain a valid node after this function has been called.
1191 * If @parent is %NULL returns the first node, equivalent to
1192 * <literal>gtk_tree_model_get_iter_first (tree_model, iter);</literal>
1194 * Return value: %TRUE, if @child has been set to the first child.
1197 gtk_tree_model_iter_children (GtkTreeModel *tree_model,
1199 GtkTreeIter *parent)
1201 GtkTreeModelIface *iface;
1203 g_return_val_if_fail (GTK_IS_TREE_MODEL (tree_model), FALSE);
1204 g_return_val_if_fail (iter != NULL, FALSE);
1206 iface = GTK_TREE_MODEL_GET_IFACE (tree_model);
1207 g_return_val_if_fail (iface->iter_children != NULL, FALSE);
1209 INITIALIZE_TREE_ITER (iter);
1211 return (* iface->iter_children) (tree_model, iter, parent);
1215 * gtk_tree_model_iter_has_child:
1216 * @tree_model: A #GtkTreeModel.
1217 * @iter: The #GtkTreeIter to test for children.
1219 * Returns %TRUE if @iter has children, %FALSE otherwise.
1221 * Return value: %TRUE if @iter has children.
1224 gtk_tree_model_iter_has_child (GtkTreeModel *tree_model,
1227 GtkTreeModelIface *iface;
1229 g_return_val_if_fail (GTK_IS_TREE_MODEL (tree_model), FALSE);
1230 g_return_val_if_fail (iter != NULL, FALSE);
1232 iface = GTK_TREE_MODEL_GET_IFACE (tree_model);
1233 g_return_val_if_fail (iface->iter_has_child != NULL, FALSE);
1235 return (* iface->iter_has_child) (tree_model, iter);
1239 * gtk_tree_model_iter_n_children:
1240 * @tree_model: A #GtkTreeModel.
1241 * @iter: (allow-none): The #GtkTreeIter, or %NULL.
1243 * Returns the number of children that @iter has. As a special case, if @iter
1244 * is %NULL, then the number of toplevel nodes is returned.
1246 * Return value: The number of children of @iter.
1249 gtk_tree_model_iter_n_children (GtkTreeModel *tree_model,
1252 GtkTreeModelIface *iface;
1254 g_return_val_if_fail (GTK_IS_TREE_MODEL (tree_model), 0);
1256 iface = GTK_TREE_MODEL_GET_IFACE (tree_model);
1257 g_return_val_if_fail (iface->iter_n_children != NULL, 0);
1259 return (* iface->iter_n_children) (tree_model, iter);
1263 * gtk_tree_model_iter_nth_child:
1264 * @tree_model: A #GtkTreeModel.
1265 * @iter: (out): The #GtkTreeIter to set to the nth child.
1266 * @parent: (allow-none): The #GtkTreeIter to get the child from, or %NULL.
1267 * @n: Then index of the desired child.
1269 * Sets @iter to be the child of @parent, using the given index. The first
1270 * index is 0. If @n is too big, or @parent has no children, @iter is set
1271 * to an invalid iterator and %FALSE is returned. @parent will remain a valid
1272 * node after this function has been called. As a special case, if @parent is
1273 * %NULL, then the @n<!-- -->th root node is set.
1275 * Return value: %TRUE, if @parent has an @n<!-- -->th child.
1278 gtk_tree_model_iter_nth_child (GtkTreeModel *tree_model,
1280 GtkTreeIter *parent,
1283 GtkTreeModelIface *iface;
1285 g_return_val_if_fail (GTK_IS_TREE_MODEL (tree_model), FALSE);
1286 g_return_val_if_fail (iter != NULL, FALSE);
1287 g_return_val_if_fail (n >= 0, FALSE);
1289 iface = GTK_TREE_MODEL_GET_IFACE (tree_model);
1290 g_return_val_if_fail (iface->iter_nth_child != NULL, FALSE);
1292 INITIALIZE_TREE_ITER (iter);
1294 return (* iface->iter_nth_child) (tree_model, iter, parent, n);
1298 * gtk_tree_model_iter_parent:
1299 * @tree_model: A #GtkTreeModel
1300 * @iter: (out): The new #GtkTreeIter to set to the parent.
1301 * @child: The #GtkTreeIter.
1303 * Sets @iter to be the parent of @child. If @child is at the toplevel, and
1304 * doesn't have a parent, then @iter is set to an invalid iterator and %FALSE
1305 * is returned. @child will remain a valid node after this function has been
1308 * Return value: %TRUE, if @iter is set to the parent of @child.
1311 gtk_tree_model_iter_parent (GtkTreeModel *tree_model,
1315 GtkTreeModelIface *iface;
1317 g_return_val_if_fail (GTK_IS_TREE_MODEL (tree_model), FALSE);
1318 g_return_val_if_fail (iter != NULL, FALSE);
1319 g_return_val_if_fail (child != NULL, FALSE);
1321 iface = GTK_TREE_MODEL_GET_IFACE (tree_model);
1322 g_return_val_if_fail (iface->iter_parent != NULL, FALSE);
1324 INITIALIZE_TREE_ITER (iter);
1326 return (* iface->iter_parent) (tree_model, iter, child);
1330 * gtk_tree_model_ref_node:
1331 * @tree_model: A #GtkTreeModel.
1332 * @iter: The #GtkTreeIter.
1334 * Lets the tree ref the node. This is an optional method for models to
1335 * implement. To be more specific, models may ignore this call as it exists
1336 * primarily for performance reasons.
1338 * This function is primarily meant as a way for views to let caching model
1339 * know when nodes are being displayed (and hence, whether or not to cache that
1340 * node.) For example, a file-system based model would not want to keep the
1341 * entire file-hierarchy in memory, just the sections that are currently being
1342 * displayed by every current view.
1344 * A model should be expected to be able to get an iter independent of its
1348 gtk_tree_model_ref_node (GtkTreeModel *tree_model,
1351 GtkTreeModelIface *iface;
1353 g_return_if_fail (GTK_IS_TREE_MODEL (tree_model));
1355 iface = GTK_TREE_MODEL_GET_IFACE (tree_model);
1356 if (iface->ref_node)
1357 (* iface->ref_node) (tree_model, iter);
1361 * gtk_tree_model_unref_node:
1362 * @tree_model: A #GtkTreeModel.
1363 * @iter: The #GtkTreeIter.
1365 * Lets the tree unref the node. This is an optional method for models to
1366 * implement. To be more specific, models may ignore this call as it exists
1367 * primarily for performance reasons.
1369 * For more information on what this means, see gtk_tree_model_ref_node().
1370 * Please note that nodes that are deleted are not unreffed.
1373 gtk_tree_model_unref_node (GtkTreeModel *tree_model,
1376 GtkTreeModelIface *iface;
1378 g_return_if_fail (GTK_IS_TREE_MODEL (tree_model));
1379 g_return_if_fail (iter != NULL);
1381 iface = GTK_TREE_MODEL_GET_IFACE (tree_model);
1382 if (iface->unref_node)
1383 (* iface->unref_node) (tree_model, iter);
1387 * gtk_tree_model_get:
1388 * @tree_model: a #GtkTreeModel
1389 * @iter: a row in @tree_model
1390 * @Varargs: pairs of column number and value return locations, terminated by -1
1392 * Gets the value of one or more cells in the row referenced by @iter.
1393 * The variable argument list should contain integer column numbers,
1394 * each column number followed by a place to store the value being
1395 * retrieved. The list is terminated by a -1. For example, to get a
1396 * value from column 0 with type %G_TYPE_STRING, you would
1397 * write: <literal>gtk_tree_model_get (model, iter, 0, &place_string_here, -1)</literal>,
1398 * where <literal>place_string_here</literal> is a <type>gchar*</type> to be
1399 * filled with the string.
1401 * Returned values with type %G_TYPE_OBJECT have to be unreferenced, values
1402 * with type %G_TYPE_STRING or %G_TYPE_BOXED have to be freed. Other values are
1406 gtk_tree_model_get (GtkTreeModel *tree_model,
1412 g_return_if_fail (GTK_IS_TREE_MODEL (tree_model));
1413 g_return_if_fail (iter != NULL);
1415 va_start (var_args, iter);
1416 gtk_tree_model_get_valist (tree_model, iter, var_args);
1421 * gtk_tree_model_get_valist:
1422 * @tree_model: a #GtkTreeModel
1423 * @iter: a row in @tree_model
1424 * @var_args: <type>va_list</type> of column/return location pairs
1426 * See gtk_tree_model_get(), this version takes a <type>va_list</type>
1427 * for language bindings to use.
1430 gtk_tree_model_get_valist (GtkTreeModel *tree_model,
1436 g_return_if_fail (GTK_IS_TREE_MODEL (tree_model));
1437 g_return_if_fail (iter != NULL);
1439 column = va_arg (var_args, gint);
1441 while (column != -1)
1443 GValue value = { 0, };
1444 gchar *error = NULL;
1446 if (column >= gtk_tree_model_get_n_columns (tree_model))
1448 g_warning ("%s: Invalid column number %d accessed (remember to end your list of columns with a -1)", G_STRLOC, column);
1452 gtk_tree_model_get_value (GTK_TREE_MODEL (tree_model), iter, column, &value);
1454 G_VALUE_LCOPY (&value, var_args, 0, &error);
1457 g_warning ("%s: %s", G_STRLOC, error);
1460 /* we purposely leak the value here, it might not be
1461 * in a sane state if an error condition occoured
1466 g_value_unset (&value);
1468 column = va_arg (var_args, gint);
1473 * gtk_tree_model_row_changed:
1474 * @tree_model: A #GtkTreeModel
1475 * @path: A #GtkTreePath pointing to the changed row
1476 * @iter: A valid #GtkTreeIter pointing to the changed row
1478 * Emits the "row-changed" signal on @tree_model.
1481 gtk_tree_model_row_changed (GtkTreeModel *tree_model,
1485 g_return_if_fail (GTK_IS_TREE_MODEL (tree_model));
1486 g_return_if_fail (path != NULL);
1487 g_return_if_fail (iter != NULL);
1489 g_signal_emit (tree_model, tree_model_signals[ROW_CHANGED], 0, path, iter);
1493 * gtk_tree_model_row_inserted:
1494 * @tree_model: A #GtkTreeModel
1495 * @path: A #GtkTreePath pointing to the inserted row
1496 * @iter: A valid #GtkTreeIter pointing to the inserted row
1498 * Emits the "row-inserted" signal on @tree_model
1501 gtk_tree_model_row_inserted (GtkTreeModel *tree_model,
1505 g_return_if_fail (GTK_IS_TREE_MODEL (tree_model));
1506 g_return_if_fail (path != NULL);
1507 g_return_if_fail (iter != NULL);
1509 g_signal_emit (tree_model, tree_model_signals[ROW_INSERTED], 0, path, iter);
1513 * gtk_tree_model_row_has_child_toggled:
1514 * @tree_model: A #GtkTreeModel
1515 * @path: A #GtkTreePath pointing to the changed row
1516 * @iter: A valid #GtkTreeIter pointing to the changed row
1518 * Emits the "row-has-child-toggled" signal on @tree_model. This should be
1519 * called by models after the child state of a node changes.
1522 gtk_tree_model_row_has_child_toggled (GtkTreeModel *tree_model,
1526 g_return_if_fail (GTK_IS_TREE_MODEL (tree_model));
1527 g_return_if_fail (path != NULL);
1528 g_return_if_fail (iter != NULL);
1530 g_signal_emit (tree_model, tree_model_signals[ROW_HAS_CHILD_TOGGLED], 0, path, iter);
1534 * gtk_tree_model_row_deleted:
1535 * @tree_model: A #GtkTreeModel
1536 * @path: A #GtkTreePath pointing to the previous location of the deleted row.
1538 * Emits the "row-deleted" signal on @tree_model. This should be called by
1539 * models after a row has been removed. The location pointed to by @path
1540 * should be the location that the row previously was at. It may not be a
1541 * valid location anymore.
1544 gtk_tree_model_row_deleted (GtkTreeModel *tree_model,
1547 g_return_if_fail (GTK_IS_TREE_MODEL (tree_model));
1548 g_return_if_fail (path != NULL);
1550 g_signal_emit (tree_model, tree_model_signals[ROW_DELETED], 0, path);
1554 * gtk_tree_model_rows_reordered:
1555 * @tree_model: A #GtkTreeModel
1556 * @path: A #GtkTreePath pointing to the tree node whose children have been
1558 * @iter: A valid #GtkTreeIter pointing to the node whose children have been
1559 * reordered, or %NULL if the depth of @path is 0.
1560 * @new_order: an array of integers mapping the current position of each child
1561 * to its old position before the re-ordering,
1562 * i.e. @new_order<literal>[newpos] = oldpos</literal>.
1564 * Emits the "rows-reordered" signal on @tree_model. This should be called by
1565 * models when their rows have been reordered.
1568 gtk_tree_model_rows_reordered (GtkTreeModel *tree_model,
1573 g_return_if_fail (GTK_IS_TREE_MODEL (tree_model));
1574 g_return_if_fail (new_order != NULL);
1576 g_signal_emit (tree_model, tree_model_signals[ROWS_REORDERED], 0, path, iter, new_order);
1581 gtk_tree_model_foreach_helper (GtkTreeModel *model,
1584 GtkTreeModelForeachFunc func,
1591 if ((* func) (model, path, iter, user_data))
1594 if (gtk_tree_model_iter_children (model, &child, iter))
1596 gtk_tree_path_down (path);
1597 if (gtk_tree_model_foreach_helper (model, &child, path, func, user_data))
1599 gtk_tree_path_up (path);
1602 gtk_tree_path_next (path);
1604 while (gtk_tree_model_iter_next (model, iter));
1610 * gtk_tree_model_foreach:
1611 * @model: A #GtkTreeModel
1612 * @func: A function to be called on each row
1613 * @user_data: User data to passed to func.
1615 * Calls func on each node in model in a depth-first fashion.
1616 * If @func returns %TRUE, then the tree ceases to be walked, and
1617 * gtk_tree_model_foreach() returns.
1620 gtk_tree_model_foreach (GtkTreeModel *model,
1621 GtkTreeModelForeachFunc func,
1627 g_return_if_fail (GTK_IS_TREE_MODEL (model));
1628 g_return_if_fail (func != NULL);
1630 path = gtk_tree_path_new_first ();
1631 if (gtk_tree_model_get_iter (model, &iter, path) == FALSE)
1633 gtk_tree_path_free (path);
1637 gtk_tree_model_foreach_helper (model, &iter, path, func, user_data);
1638 gtk_tree_path_free (path);
1643 * GtkTreeRowReference
1646 static void gtk_tree_row_reference_unref_path (GtkTreePath *path,
1647 GtkTreeModel *model,
1651 G_DEFINE_BOXED_TYPE (GtkTreeRowReference, gtk_tree_row_reference,
1652 gtk_tree_row_reference_copy,
1653 gtk_tree_row_reference_free)
1655 struct _GtkTreeRowReference
1658 GtkTreeModel *model;
1664 release_row_references (gpointer data)
1666 RowRefList *refs = data;
1667 GSList *tmp_list = NULL;
1669 tmp_list = refs->list;
1670 while (tmp_list != NULL)
1672 GtkTreeRowReference *reference = tmp_list->data;
1674 if (reference->proxy == (GObject *)reference->model)
1675 reference->model = NULL;
1676 reference->proxy = NULL;
1678 /* we don't free the reference, users are responsible for that. */
1680 tmp_list = g_slist_next (tmp_list);
1683 g_slist_free (refs->list);
1688 gtk_tree_row_ref_inserted (RowRefList *refs,
1697 /* This function corrects the path stored in the reference to
1698 * account for an insertion. Note that it's called _after_ the insertion
1699 * with the path to the newly-inserted row. Which means that
1700 * the inserted path is in a different "coordinate system" than
1701 * the old path (e.g. if the inserted path was just before the old path,
1702 * then inserted path and old path will be the same, and old path must be
1706 tmp_list = refs->list;
1708 while (tmp_list != NULL)
1710 GtkTreeRowReference *reference = tmp_list->data;
1712 if (reference->path == NULL)
1715 if (reference->path->depth >= path->depth)
1718 gboolean ancestor = TRUE;
1720 for (i = 0; i < path->depth - 1; i ++)
1722 if (path->indices[i] != reference->path->indices[i])
1728 if (ancestor == FALSE)
1731 if (path->indices[path->depth-1] <= reference->path->indices[path->depth-1])
1732 reference->path->indices[path->depth-1] += 1;
1735 tmp_list = g_slist_next (tmp_list);
1740 gtk_tree_row_ref_deleted (RowRefList *refs,
1748 /* This function corrects the path stored in the reference to
1749 * account for an deletion. Note that it's called _after_ the
1750 * deletion with the old path of the just-deleted row. Which means
1751 * that the deleted path is the same now-defunct "coordinate system"
1752 * as the path saved in the reference, which is what we want to fix.
1755 tmp_list = refs->list;
1757 while (tmp_list != NULL)
1759 GtkTreeRowReference *reference = tmp_list->data;
1761 if (reference->path)
1765 if (path->depth > reference->path->depth)
1767 for (i = 0; i < path->depth - 1; i++)
1769 if (path->indices[i] != reference->path->indices[i])
1773 /* We know it affects us. */
1774 if (path->indices[i] == reference->path->indices[i])
1776 if (reference->path->depth > path->depth)
1777 /* some parent was deleted, trying to unref any node
1778 * between the deleted parent and the node the reference
1779 * is pointing to is bad, as those nodes are already gone.
1781 gtk_tree_row_reference_unref_path (reference->path, reference->model, path->depth - 1);
1783 gtk_tree_row_reference_unref_path (reference->path, reference->model, reference->path->depth - 1);
1784 gtk_tree_path_free (reference->path);
1785 reference->path = NULL;
1787 else if (path->indices[i] < reference->path->indices[i])
1789 reference->path->indices[path->depth-1]-=1;
1794 tmp_list = g_slist_next (tmp_list);
1799 gtk_tree_row_ref_reordered (RowRefList *refs,
1810 tmp_list = refs->list;
1812 while (tmp_list != NULL)
1814 GtkTreeRowReference *reference = tmp_list->data;
1816 length = gtk_tree_model_iter_n_children (GTK_TREE_MODEL (reference->model), iter);
1821 if ((reference->path) &&
1822 (gtk_tree_path_is_ancestor (path, reference->path)))
1824 gint ref_depth = gtk_tree_path_get_depth (reference->path);
1825 gint depth = gtk_tree_path_get_depth (path);
1827 if (ref_depth > depth)
1830 gint *indices = gtk_tree_path_get_indices (reference->path);
1832 for (i = 0; i < length; i++)
1834 if (new_order[i] == indices[depth])
1843 tmp_list = g_slist_next (tmp_list);
1847 /* We do this recursively so that we can unref children nodes before their parent */
1849 gtk_tree_row_reference_unref_path_helper (GtkTreePath *path,
1850 GtkTreeModel *model,
1851 GtkTreeIter *parent_iter,
1857 if (depth == current_depth)
1860 gtk_tree_model_iter_nth_child (model, &iter, parent_iter, path->indices[current_depth]);
1861 gtk_tree_row_reference_unref_path_helper (path, model, &iter, depth, current_depth + 1);
1862 gtk_tree_model_unref_node (model, &iter);
1866 gtk_tree_row_reference_unref_path (GtkTreePath *path,
1867 GtkTreeModel *model,
1875 gtk_tree_model_iter_nth_child (model, &iter, NULL, path->indices[0]);
1876 gtk_tree_row_reference_unref_path_helper (path, model, &iter, depth, 1);
1877 gtk_tree_model_unref_node (model, &iter);
1881 * gtk_tree_row_reference_new:
1882 * @model: A #GtkTreeModel
1883 * @path: A valid #GtkTreePath to monitor
1885 * Creates a row reference based on @path. This reference will keep pointing
1886 * to the node pointed to by @path, so long as it exists. It listens to all
1887 * signals emitted by @model, and updates its path appropriately. If @path
1888 * isn't a valid path in @model, then %NULL is returned.
1890 * Return value: A newly allocated #GtkTreeRowReference, or %NULL
1892 GtkTreeRowReference *
1893 gtk_tree_row_reference_new (GtkTreeModel *model,
1896 g_return_val_if_fail (GTK_IS_TREE_MODEL (model), NULL);
1897 g_return_val_if_fail (path != NULL, NULL);
1899 /* We use the model itself as the proxy object; and call
1900 * gtk_tree_row_reference_inserted(), etc, in the
1901 * class closure (default handler) marshalers for the signal.
1903 return gtk_tree_row_reference_new_proxy (G_OBJECT (model), model, path);
1907 * gtk_tree_row_reference_new_proxy:
1908 * @proxy: A proxy #GObject
1909 * @model: A #GtkTreeModel
1910 * @path: A valid #GtkTreePath to monitor
1912 * You do not need to use this function. Creates a row reference based on
1913 * @path. This reference will keep pointing to the node pointed to by @path,
1914 * so long as it exists. If @path isn't a valid path in @model, then %NULL is
1915 * returned. However, unlike references created with
1916 * gtk_tree_row_reference_new(), it does not listen to the model for changes.
1917 * The creator of the row reference must do this explicitly using
1918 * gtk_tree_row_reference_inserted(), gtk_tree_row_reference_deleted(),
1919 * gtk_tree_row_reference_reordered().
1921 * These functions must be called exactly once per proxy when the
1922 * corresponding signal on the model is emitted. This single call
1923 * updates all row references for that proxy. Since built-in GTK+
1924 * objects like #GtkTreeView already use this mechanism internally,
1925 * using them as the proxy object will produce unpredictable results.
1926 * Further more, passing the same object as @model and @proxy
1927 * doesn't work for reasons of internal implementation.
1929 * This type of row reference is primarily meant by structures that need to
1930 * carefully monitor exactly when a row reference updates itself, and is not
1931 * generally needed by most applications.
1933 * Return value: A newly allocated #GtkTreeRowReference, or %NULL
1935 GtkTreeRowReference *
1936 gtk_tree_row_reference_new_proxy (GObject *proxy,
1937 GtkTreeModel *model,
1940 GtkTreeRowReference *reference;
1942 GtkTreeIter parent_iter;
1945 g_return_val_if_fail (G_IS_OBJECT (proxy), NULL);
1946 g_return_val_if_fail (GTK_IS_TREE_MODEL (model), NULL);
1947 g_return_val_if_fail (path != NULL, NULL);
1948 g_return_val_if_fail (path->depth > 0, NULL);
1950 /* check that the path is valid */
1951 if (gtk_tree_model_get_iter (model, &parent_iter, path) == FALSE)
1954 /* Now we want to ref every node */
1955 gtk_tree_model_iter_nth_child (model, &parent_iter, NULL, path->indices[0]);
1956 gtk_tree_model_ref_node (model, &parent_iter);
1958 for (i = 1; i < path->depth; i++)
1961 gtk_tree_model_iter_nth_child (model, &iter, &parent_iter, path->indices[i]);
1962 gtk_tree_model_ref_node (model, &iter);
1966 /* Make the row reference */
1967 reference = g_new (GtkTreeRowReference, 1);
1969 g_object_ref (proxy);
1970 g_object_ref (model);
1971 reference->proxy = proxy;
1972 reference->model = model;
1973 reference->path = gtk_tree_path_copy (path);
1975 refs = g_object_get_data (G_OBJECT (proxy), ROW_REF_DATA_STRING);
1979 refs = g_new (RowRefList, 1);
1982 g_object_set_data_full (G_OBJECT (proxy),
1983 I_(ROW_REF_DATA_STRING),
1984 refs, release_row_references);
1987 refs->list = g_slist_prepend (refs->list, reference);
1993 * gtk_tree_row_reference_get_path:
1994 * @reference: A #GtkTreeRowReference
1996 * Returns a path that the row reference currently points to, or %NULL if the
1997 * path pointed to is no longer valid.
1999 * Return value: A current path, or %NULL.
2002 gtk_tree_row_reference_get_path (GtkTreeRowReference *reference)
2004 g_return_val_if_fail (reference != NULL, NULL);
2006 if (reference->proxy == NULL)
2009 if (reference->path == NULL)
2012 return gtk_tree_path_copy (reference->path);
2016 * gtk_tree_row_reference_get_model:
2017 * @reference: A #GtkTreeRowReference
2019 * Returns the model that the row reference is monitoring.
2021 * Return value: the model
2026 gtk_tree_row_reference_get_model (GtkTreeRowReference *reference)
2028 g_return_val_if_fail (reference != NULL, NULL);
2030 return reference->model;
2034 * gtk_tree_row_reference_valid:
2035 * @reference: (allow-none): A #GtkTreeRowReference, or %NULL
2037 * Returns %TRUE if the @reference is non-%NULL and refers to a current valid
2040 * Return value: %TRUE if @reference points to a valid path.
2043 gtk_tree_row_reference_valid (GtkTreeRowReference *reference)
2045 if (reference == NULL || reference->path == NULL)
2053 * gtk_tree_row_reference_copy:
2054 * @reference: a #GtkTreeRowReference
2056 * Copies a #GtkTreeRowReference.
2058 * Return value: a copy of @reference.
2062 GtkTreeRowReference *
2063 gtk_tree_row_reference_copy (GtkTreeRowReference *reference)
2065 return gtk_tree_row_reference_new_proxy (reference->proxy,
2071 * gtk_tree_row_reference_free:
2072 * @reference: (allow-none): A #GtkTreeRowReference, or %NULL
2074 * Free's @reference. @reference may be %NULL.
2077 gtk_tree_row_reference_free (GtkTreeRowReference *reference)
2081 if (reference == NULL)
2084 refs = g_object_get_data (G_OBJECT (reference->proxy), ROW_REF_DATA_STRING);
2088 g_warning (G_STRLOC": bad row reference, proxy has no outstanding row references");
2092 refs->list = g_slist_remove (refs->list, reference);
2094 if (refs->list == NULL)
2096 g_object_set_data (G_OBJECT (reference->proxy),
2097 I_(ROW_REF_DATA_STRING),
2101 if (reference->path)
2103 gtk_tree_row_reference_unref_path (reference->path, reference->model, reference->path->depth);
2104 gtk_tree_path_free (reference->path);
2107 g_object_unref (reference->proxy);
2108 g_object_unref (reference->model);
2113 * gtk_tree_row_reference_inserted:
2114 * @proxy: A #GObject
2115 * @path: The row position that was inserted
2117 * Lets a set of row reference created by gtk_tree_row_reference_new_proxy()
2118 * know that the model emitted the "row_inserted" signal.
2121 gtk_tree_row_reference_inserted (GObject *proxy,
2124 g_return_if_fail (G_IS_OBJECT (proxy));
2126 gtk_tree_row_ref_inserted ((RowRefList *)g_object_get_data (proxy, ROW_REF_DATA_STRING), path, NULL);
2130 * gtk_tree_row_reference_deleted:
2131 * @proxy: A #GObject
2132 * @path: The path position that was deleted
2134 * Lets a set of row reference created by gtk_tree_row_reference_new_proxy()
2135 * know that the model emitted the "row_deleted" signal.
2138 gtk_tree_row_reference_deleted (GObject *proxy,
2141 g_return_if_fail (G_IS_OBJECT (proxy));
2143 gtk_tree_row_ref_deleted ((RowRefList *)g_object_get_data (proxy, ROW_REF_DATA_STRING), path);
2147 * gtk_tree_row_reference_reordered:
2148 * @proxy: A #GObject
2149 * @path: The parent path of the reordered signal
2150 * @iter: The iter pointing to the parent of the reordered
2151 * @new_order: The new order of rows
2153 * Lets a set of row reference created by gtk_tree_row_reference_new_proxy()
2154 * know that the model emitted the "rows_reordered" signal.
2157 gtk_tree_row_reference_reordered (GObject *proxy,
2162 g_return_if_fail (G_IS_OBJECT (proxy));
2164 gtk_tree_row_ref_reordered ((RowRefList *)g_object_get_data (proxy, ROW_REF_DATA_STRING), path, iter, new_order);