/* gtkliststore.c * Copyright (C) 2000 Red Hat, Inc., Jonathan Blandford * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ #include #include "gtktreemodel.h" #include "gtkliststore.h" #include "gtktreedatalist.h" #include "gtksignal.h" #include "gtktreednd.h" #include #define G_SLIST(x) ((GSList *) x) #define GTK_LIST_STORE_IS_SORTED(list) (GTK_LIST_STORE (list)->sort_column_id != -2) #define VALID_ITER(iter, list_store) (iter!= NULL && iter->user_data != NULL && list_store->stamp == iter->stamp) static void gtk_list_store_init (GtkListStore *list_store); static void gtk_list_store_class_init (GtkListStoreClass *class); static void gtk_list_store_tree_model_init (GtkTreeModelIface *iface); static void gtk_list_store_drag_source_init(GtkTreeDragSourceIface *iface); static void gtk_list_store_drag_dest_init (GtkTreeDragDestIface *iface); static void gtk_list_store_sortable_init (GtkTreeSortableIface *iface); static void gtk_list_store_finalize (GObject *object); static guint gtk_list_store_get_flags (GtkTreeModel *tree_model); static gint gtk_list_store_get_n_columns (GtkTreeModel *tree_model); static GType gtk_list_store_get_column_type (GtkTreeModel *tree_model, gint index); static gboolean gtk_list_store_get_iter (GtkTreeModel *tree_model, GtkTreeIter *iter, GtkTreePath *path); static GtkTreePath *gtk_list_store_get_path (GtkTreeModel *tree_model, GtkTreeIter *iter); static void gtk_list_store_get_value (GtkTreeModel *tree_model, GtkTreeIter *iter, gint column, GValue *value); static gboolean gtk_list_store_iter_next (GtkTreeModel *tree_model, GtkTreeIter *iter); static gboolean gtk_list_store_iter_children (GtkTreeModel *tree_model, GtkTreeIter *iter, GtkTreeIter *parent); static gboolean gtk_list_store_iter_has_child (GtkTreeModel *tree_model, GtkTreeIter *iter); static gint gtk_list_store_iter_n_children (GtkTreeModel *tree_model, GtkTreeIter *iter); static gboolean gtk_list_store_iter_nth_child (GtkTreeModel *tree_model, GtkTreeIter *iter, GtkTreeIter *parent, gint n); static gboolean gtk_list_store_iter_parent (GtkTreeModel *tree_model, GtkTreeIter *iter, GtkTreeIter *child); static void gtk_list_store_set_n_columns (GtkListStore *list_store, gint n_columns); static void gtk_list_store_set_column_type (GtkListStore *list_store, gint column, GType type); /* Drag and Drop */ static gboolean gtk_list_store_drag_data_delete (GtkTreeDragSource *drag_source, GtkTreePath *path); static gboolean gtk_list_store_drag_data_get (GtkTreeDragSource *drag_source, GtkTreePath *path, GtkSelectionData *selection_data); static gboolean gtk_list_store_drag_data_received (GtkTreeDragDest *drag_dest, GtkTreePath *dest, GtkSelectionData *selection_data); static gboolean gtk_list_store_row_drop_possible (GtkTreeDragDest *drag_dest, GtkTreePath *dest_path, GtkSelectionData *selection_data); /* sortable */ static void gtk_list_store_sort (GtkListStore *list_store); static void gtk_list_store_sort_iter_changed (GtkListStore *list_store, GtkTreeIter *iter, gint column); static gboolean gtk_list_store_get_sort_column_id (GtkTreeSortable *sortable, gint *sort_column_id, GtkSortType *order); static void gtk_list_store_set_sort_column_id (GtkTreeSortable *sortable, gint sort_column_id, GtkSortType order); static void gtk_list_store_set_sort_func (GtkTreeSortable *sortable, gint sort_column_id, GtkTreeIterCompareFunc func, gpointer data, GtkDestroyNotify destroy); static void gtk_list_store_set_default_sort_func (GtkTreeSortable *sortable, GtkTreeIterCompareFunc func, gpointer data, GtkDestroyNotify destroy); static gboolean gtk_list_store_has_default_sort_func (GtkTreeSortable *sortable); static GObjectClass *parent_class = NULL; static void validate_list_store (GtkListStore *list_store) { if (gtk_debug_flags & GTK_DEBUG_TREE) { g_assert (g_slist_length (list_store->root) == list_store->length); g_assert (g_slist_last (list_store->root) == list_store->tail); } } GtkType gtk_list_store_get_type (void) { static GType list_store_type = 0; if (!list_store_type) { static const GTypeInfo list_store_info = { sizeof (GtkListStoreClass), NULL, /* base_init */ NULL, /* base_finalize */ (GClassInitFunc) gtk_list_store_class_init, NULL, /* class_finalize */ NULL, /* class_data */ sizeof (GtkListStore), 0, (GInstanceInitFunc) gtk_list_store_init, }; static const GInterfaceInfo tree_model_info = { (GInterfaceInitFunc) gtk_list_store_tree_model_init, NULL, NULL }; static const GInterfaceInfo drag_source_info = { (GInterfaceInitFunc) gtk_list_store_drag_source_init, NULL, NULL }; static const GInterfaceInfo drag_dest_info = { (GInterfaceInitFunc) gtk_list_store_drag_dest_init, NULL, NULL }; static const GInterfaceInfo sortable_info = { (GInterfaceInitFunc) gtk_list_store_sortable_init, NULL, NULL }; list_store_type = g_type_register_static (G_TYPE_OBJECT, "GtkListStore", &list_store_info, 0); g_type_add_interface_static (list_store_type, GTK_TYPE_TREE_MODEL, &tree_model_info); g_type_add_interface_static (list_store_type, GTK_TYPE_TREE_DRAG_SOURCE, &drag_source_info); g_type_add_interface_static (list_store_type, GTK_TYPE_TREE_DRAG_DEST, &drag_dest_info); g_type_add_interface_static (list_store_type, GTK_TYPE_TREE_SORTABLE, &sortable_info); } return list_store_type; } static void gtk_list_store_class_init (GtkListStoreClass *class) { GObjectClass *object_class; parent_class = g_type_class_peek_parent (class); object_class = (GObjectClass*) class; object_class->finalize = gtk_list_store_finalize; } static void gtk_list_store_tree_model_init (GtkTreeModelIface *iface) { iface->get_flags = gtk_list_store_get_flags; iface->get_n_columns = gtk_list_store_get_n_columns; iface->get_column_type = gtk_list_store_get_column_type; iface->get_iter = gtk_list_store_get_iter; iface->get_path = gtk_list_store_get_path; iface->get_value = gtk_list_store_get_value; iface->iter_next = gtk_list_store_iter_next; iface->iter_children = gtk_list_store_iter_children; iface->iter_has_child = gtk_list_store_iter_has_child; iface->iter_n_children = gtk_list_store_iter_n_children; iface->iter_nth_child = gtk_list_store_iter_nth_child; iface->iter_parent = gtk_list_store_iter_parent; } static void gtk_list_store_drag_source_init (GtkTreeDragSourceIface *iface) { iface->drag_data_delete = gtk_list_store_drag_data_delete; iface->drag_data_get = gtk_list_store_drag_data_get; } static void gtk_list_store_drag_dest_init (GtkTreeDragDestIface *iface) { iface->drag_data_received = gtk_list_store_drag_data_received; iface->row_drop_possible = gtk_list_store_row_drop_possible; } static void gtk_list_store_sortable_init (GtkTreeSortableIface *iface) { iface->get_sort_column_id = gtk_list_store_get_sort_column_id; iface->set_sort_column_id = gtk_list_store_set_sort_column_id; iface->set_sort_func = gtk_list_store_set_sort_func; iface->set_default_sort_func = gtk_list_store_set_default_sort_func; iface->has_default_sort_func = gtk_list_store_has_default_sort_func; } static void gtk_list_store_init (GtkListStore *list_store) { list_store->root = NULL; list_store->tail = NULL; list_store->sort_list = NULL; list_store->stamp = g_random_int (); list_store->length = 0; list_store->sort_column_id = -2; list_store->columns_dirty = FALSE; } /** * gtk_list_store_new: * @n_columns: number of columns in the list store * @Varargs: all #GType types for the columns, from first to last * * Creates a new list store as with @n_columns columns each of the types passed * in. As an example, gtk_tree_store_new (3, G_TYPE_INT, G_TYPE_STRING, * GDK_TYPE_PIXBUF); will create a new #GtkListStore with three columns, of type * int, string and #GdkPixbuf respectively. * * Return value: a new #GtkListStore **/ GtkListStore * gtk_list_store_new (gint n_columns, ...) { GtkListStore *retval; va_list args; gint i; g_return_val_if_fail (n_columns > 0, NULL); retval = GTK_LIST_STORE (g_object_new (gtk_list_store_get_type (), NULL)); gtk_list_store_set_n_columns (retval, n_columns); va_start (args, n_columns); for (i = 0; i < n_columns; i++) { GType type = va_arg (args, GType); if (! _gtk_tree_data_list_check_type (type)) { g_warning ("%s: Invalid type %s passed to gtk_list_store_new\n", G_STRLOC, g_type_name (type)); g_object_unref (G_OBJECT (retval)); return NULL; } gtk_list_store_set_column_type (retval, i, type); } va_end (args); return retval; } /** * gtk_list_store_newv: * @n_columns: number of columns in the list store * @types: an array of #GType types for the columns, from first to last * * Non-vararg creation function. Used primarily by language bindings. * * Return value: a new #GtkListStore **/ GtkListStore * gtk_list_store_newv (gint n_columns, GType *types) { GtkListStore *retval; gint i; g_return_val_if_fail (n_columns > 0, NULL); retval = GTK_LIST_STORE (g_object_new (gtk_list_store_get_type (), NULL)); gtk_list_store_set_n_columns (retval, n_columns); for (i = 0; i < n_columns; i++) { if (! _gtk_tree_data_list_check_type (types[i])) { g_warning ("%s: Invalid type %s passed to gtk_list_store_newv\n", G_STRLOC, g_type_name (types[i])); g_object_unref (G_OBJECT (retval)); return NULL; } gtk_list_store_set_column_type (retval, i, types[i]); } return retval; } /** * gtk_list_store_set_column_types: * @list_store: A #GtkListStore * @n_columns: Number of columns for the list store * @types: An array length n of #GTypes * * This function is meant primarily for #GObjects that inherit from #GtkListStore, * and should only be used when constructing a new #GtkListStore. It will not * function after a row has been added, or a method on the #GtkTreeModel * interface is called. **/ void gtk_list_store_set_column_types (GtkListStore *list_store, gint n_columns, GType *types) { gint i; g_return_if_fail (GTK_IS_LIST_STORE (list_store)); g_return_if_fail (list_store->columns_dirty == 0); gtk_list_store_set_n_columns (list_store, n_columns); for (i = 0; i < n_columns; i++) { if (! _gtk_tree_data_list_check_type (types[i])) { g_warning ("%s: Invalid type %s passed to gtk_list_store_set_column_types\n", G_STRLOC, g_type_name (types[i])); continue; } gtk_list_store_set_column_type (list_store, i, types[i]); } } static void gtk_list_store_set_n_columns (GtkListStore *list_store, gint n_columns) { GType *new_columns; g_return_if_fail (GTK_IS_LIST_STORE (list_store)); g_return_if_fail (n_columns > 0); if (list_store->n_columns == n_columns) return; new_columns = g_new0 (GType, n_columns); if (list_store->column_headers) { /* copy the old header orders over */ if (n_columns >= list_store->n_columns) memcpy (new_columns, list_store->column_headers, list_store->n_columns * sizeof (gchar *)); else memcpy (new_columns, list_store->column_headers, n_columns * sizeof (GType)); g_free (list_store->column_headers); } if (list_store->sort_list) _gtk_tree_data_list_header_free (list_store->sort_list); list_store->sort_list = _gtk_tree_data_list_header_new (n_columns, list_store->column_headers); list_store->column_headers = new_columns; list_store->n_columns = n_columns; } static void gtk_list_store_set_column_type (GtkListStore *list_store, gint column, GType type) { g_return_if_fail (GTK_IS_LIST_STORE (list_store)); g_return_if_fail (column >=0 && column < list_store->n_columns); if (!_gtk_tree_data_list_check_type (type)) { g_warning ("%s: Invalid type %s passed to gtk_list_store_set_column_type\n", G_STRLOC, g_type_name (type)); return; } list_store->column_headers[column] = type; } static void gtk_list_store_finalize (GObject *object) { GtkListStore *list_store = GTK_LIST_STORE (object); g_list_foreach (list_store->root, (GFunc) _gtk_tree_data_list_free, list_store->column_headers); _gtk_tree_data_list_header_free (list_store->sort_list); g_free (list_store->column_headers); if (list_store->default_sort_destroy) { (* list_store->default_sort_destroy) (list_store->default_sort_data); list_store->default_sort_destroy = NULL; list_store->default_sort_data = NULL; } (* parent_class->finalize) (object); } /* Fulfill the GtkTreeModel requirements */ static guint gtk_list_store_get_flags (GtkTreeModel *tree_model) { g_return_val_if_fail (GTK_IS_LIST_STORE (tree_model), 0); return GTK_TREE_MODEL_ITERS_PERSIST | GTK_TREE_MODEL_LIST_ONLY; } static gint gtk_list_store_get_n_columns (GtkTreeModel *tree_model) { GtkListStore *list_store = (GtkListStore *) tree_model; g_return_val_if_fail (GTK_IS_LIST_STORE (tree_model), 0); list_store->columns_dirty = TRUE; return list_store->n_columns; } static GType gtk_list_store_get_column_type (GtkTreeModel *tree_model, gint index) { GtkListStore *list_store = (GtkListStore *) tree_model; g_return_val_if_fail (GTK_IS_LIST_STORE (tree_model), G_TYPE_INVALID); g_return_val_if_fail (index < GTK_LIST_STORE (tree_model)->n_columns && index >= 0, G_TYPE_INVALID); list_store->columns_dirty = TRUE; return list_store->column_headers[index]; } static gboolean gtk_list_store_get_iter (GtkTreeModel *tree_model, GtkTreeIter *iter, GtkTreePath *path) { GtkListStore *list_store = (GtkListStore *) tree_model; GSList *list; gint i; g_return_val_if_fail (GTK_IS_LIST_STORE (tree_model), FALSE); g_return_val_if_fail (gtk_tree_path_get_depth (path) > 0, FALSE); list_store->columns_dirty = TRUE; i = gtk_tree_path_get_indices (path)[0]; if (i >= list_store->length) return FALSE; list = g_slist_nth (G_SLIST (list_store->root), i); /* If this fails, list_store->length has gotten mangled. */ g_assert (list); iter->stamp = list_store->stamp; iter->user_data = list; return TRUE; } static GtkTreePath * gtk_list_store_get_path (GtkTreeModel *tree_model, GtkTreeIter *iter) { GtkTreePath *retval; GSList *list; gint i = 0; g_return_val_if_fail (GTK_IS_LIST_STORE (tree_model), NULL); g_return_val_if_fail (iter->stamp == GTK_LIST_STORE (tree_model)->stamp, NULL); for (list = G_SLIST (GTK_LIST_STORE (tree_model)->root); list; list = list->next) { if (list == G_SLIST (iter->user_data)) break; i++; } if (list == NULL) return NULL; retval = gtk_tree_path_new (); gtk_tree_path_append_index (retval, i); return retval; } static void gtk_list_store_get_value (GtkTreeModel *tree_model, GtkTreeIter *iter, gint column, GValue *value) { GtkTreeDataList *list; gint tmp_column = column; g_return_if_fail (GTK_IS_LIST_STORE (tree_model)); g_return_if_fail (column < GTK_LIST_STORE (tree_model)->n_columns); g_return_if_fail (GTK_LIST_STORE (tree_model)->stamp == iter->stamp); list = G_SLIST (iter->user_data)->data; while (tmp_column-- > 0 && list) list = list->next; if (list == NULL) g_value_init (value, GTK_LIST_STORE (tree_model)->column_headers[column]); else _gtk_tree_data_list_node_to_value (list, GTK_LIST_STORE (tree_model)->column_headers[column], value); } static gboolean gtk_list_store_iter_next (GtkTreeModel *tree_model, GtkTreeIter *iter) { g_return_val_if_fail (GTK_IS_LIST_STORE (tree_model), FALSE); g_return_val_if_fail (GTK_LIST_STORE (tree_model)->stamp == iter->stamp, FALSE); iter->user_data = G_SLIST (iter->user_data)->next; return (iter->user_data != NULL); } static gboolean gtk_list_store_iter_children (GtkTreeModel *tree_model, GtkTreeIter *iter, GtkTreeIter *parent) { /* this is a list, nodes have no children */ if (parent) return FALSE; /* but if parent == NULL we return the list itself as children of the * "root" */ if (GTK_LIST_STORE (tree_model)->root) { iter->stamp = GTK_LIST_STORE (tree_model)->stamp; iter->user_data = GTK_LIST_STORE (tree_model)->root; return TRUE; } else return FALSE; } static gboolean gtk_list_store_iter_has_child (GtkTreeModel *tree_model, GtkTreeIter *iter) { return FALSE; } static gint gtk_list_store_iter_n_children (GtkTreeModel *tree_model, GtkTreeIter *iter) { g_return_val_if_fail (GTK_IS_LIST_STORE (tree_model), -1); if (iter == NULL) return GTK_LIST_STORE (tree_model)->length; g_return_val_if_fail (GTK_LIST_STORE (tree_model)->stamp == iter->stamp, -1); return 0; } static gboolean gtk_list_store_iter_nth_child (GtkTreeModel *tree_model, GtkTreeIter *iter, GtkTreeIter *parent, gint n) { GSList *child; g_return_val_if_fail (GTK_IS_LIST_STORE (tree_model), FALSE); if (parent) return FALSE; child = g_slist_nth (G_SLIST (GTK_LIST_STORE (tree_model)->root), n); if (child) { iter->stamp = GTK_LIST_STORE (tree_model)->stamp; iter->user_data = child; return TRUE; } else return FALSE; } static gboolean gtk_list_store_iter_parent (GtkTreeModel *tree_model, GtkTreeIter *iter, GtkTreeIter *child) { return FALSE; } static gboolean gtk_list_store_real_set_value (GtkListStore *list_store, GtkTreeIter *iter, gint column, GValue *value, gboolean sort) { GtkTreeDataList *list; GtkTreeDataList *prev; GtkTreePath *path; GValue real_value = {0, }; gboolean converted = FALSE; gint orig_column = column; gboolean retval = FALSE; g_return_val_if_fail (GTK_IS_LIST_STORE (list_store), FALSE); g_return_val_if_fail (VALID_ITER (iter, list_store), FALSE); g_return_val_if_fail (column >= 0 && column < list_store->n_columns, FALSE); g_return_val_if_fail (G_IS_VALUE (value), FALSE); if (! g_type_is_a (G_VALUE_TYPE (value), list_store->column_headers[column])) { if (! (g_value_type_compatible (G_VALUE_TYPE (value), list_store->column_headers[column]) && g_value_type_compatible (list_store->column_headers[column], G_VALUE_TYPE (value)))) { g_warning ("%s: Unable to convert from %s to %s\n", G_STRLOC, g_type_name (G_VALUE_TYPE (value)), g_type_name (list_store->column_headers[column])); return retval; } if (!g_value_transform (value, &real_value)) { g_warning ("%s: Unable to make conversion from %s to %s\n", G_STRLOC, g_type_name (G_VALUE_TYPE (value)), g_type_name (list_store->column_headers[column])); g_value_unset (&real_value); return retval; } converted = TRUE; } prev = list = G_SLIST (iter->user_data)->data; while (list != NULL) { if (column == 0) { path = gtk_list_store_get_path (GTK_TREE_MODEL (list_store), iter); if (converted) _gtk_tree_data_list_value_to_node (list, &real_value); else _gtk_tree_data_list_value_to_node (list, value); retval = TRUE; gtk_tree_path_free (path); if (converted) g_value_unset (&real_value); return retval; } column--; prev = list; list = list->next; } if (G_SLIST (iter->user_data)->data == NULL) { G_SLIST (iter->user_data)->data = list = _gtk_tree_data_list_alloc (); list->next = NULL; } else { list = prev->next = _gtk_tree_data_list_alloc (); list->next = NULL; } while (column != 0) { list->next = _gtk_tree_data_list_alloc (); list = list->next; list->next = NULL; column --; } path = gtk_list_store_get_path (GTK_TREE_MODEL (list_store), iter); if (converted) _gtk_tree_data_list_value_to_node (list, &real_value); else _gtk_tree_data_list_value_to_node (list, value); retval = TRUE; gtk_tree_path_free (path); if (converted) g_value_unset (&real_value); if (sort && GTK_LIST_STORE_IS_SORTED (list_store)) gtk_list_store_sort_iter_changed (list_store, iter, orig_column); return retval; } /** * gtk_list_store_set_value: * @list_store: A #GtkListStore * @iter: A valid #GtkTreeIter for the row being modified * @column: column number to modify * @value: new value for the cell * * Sets the data in the cell specified by @iter and @column. * The type of @value must be convertible to the type of the * column. * **/ void gtk_list_store_set_value (GtkListStore *list_store, GtkTreeIter *iter, gint column, GValue *value) { g_return_if_fail (GTK_IS_LIST_STORE (list_store)); g_return_if_fail (VALID_ITER (iter, list_store)); g_return_if_fail (column >= 0 && column < list_store->n_columns); g_return_if_fail (G_IS_VALUE (value)); if (gtk_list_store_real_set_value (list_store, iter, column, value, TRUE)) { GtkTreePath *path; path = gtk_tree_model_get_path (GTK_TREE_MODEL (list_store), iter); gtk_tree_model_row_changed (GTK_TREE_MODEL (list_store), path, iter); gtk_tree_path_free (path); } } /** * gtk_list_store_set_valist: * @list_store: A #GtkListStore * @iter: A valid #GtkTreeIter for the row being modified * @var_args: va_list of column/value pairs * * See gtk_list_store_set(); this version takes a va_list for use by language * bindings. * **/ void gtk_list_store_set_valist (GtkListStore *list_store, GtkTreeIter *iter, va_list var_args) { gint column; gboolean emit_signal = FALSE; gboolean maybe_need_sort = FALSE; GtkTreeIterCompareFunc func = NULL; g_return_if_fail (GTK_IS_LIST_STORE (list_store)); g_return_if_fail (VALID_ITER (iter, list_store)); column = va_arg (var_args, gint); if (GTK_LIST_STORE_IS_SORTED (list_store)) { if (list_store->sort_column_id != -1) { GtkTreeDataSortHeader *header; header = _gtk_tree_data_list_get_header (list_store->sort_list, list_store->sort_column_id); g_return_if_fail (header != NULL); g_return_if_fail (header->func != NULL); func = header->func; } else { func = list_store->default_sort_func; } } if (func != gtk_tree_data_list_compare_func) maybe_need_sort = TRUE; while (column != -1) { GValue value = { 0, }; gchar *error = NULL; if (column >= list_store->n_columns) { g_warning ("%s: Invalid column number %d added to iter (remember to end your list of columns with a -1)", G_STRLOC, column); break; } g_value_init (&value, list_store->column_headers[column]); G_VALUE_COLLECT (&value, var_args, 0, &error); if (error) { g_warning ("%s: %s", G_STRLOC, error); g_free (error); /* we purposely leak the value here, it might not be * in a sane state if an error condition occoured */ break; } /* FIXME: instead of calling this n times, refactor with above */ emit_signal = gtk_list_store_real_set_value (list_store, iter, column, &value, FALSE) || emit_signal; if (func == gtk_tree_data_list_compare_func && column == list_store->sort_column_id) maybe_need_sort = TRUE; g_value_unset (&value); column = va_arg (var_args, gint); } if (maybe_need_sort && GTK_LIST_STORE_IS_SORTED (list_store)) gtk_list_store_sort_iter_changed (list_store, iter, list_store->sort_column_id); if (emit_signal) { GtkTreePath *path; path = gtk_tree_model_get_path (GTK_TREE_MODEL (list_store), iter); gtk_tree_model_row_changed (GTK_TREE_MODEL (list_store), path, iter); gtk_tree_path_free (path); } } /** * gtk_list_store_set: * @list_store: a #GtkListStore * @iter: row iterator * @Varargs: pairs of column number and value, terminated with -1 * * Sets the value of one or more cells in the row referenced by @iter. * The variable argument list should contain integer column numbers, * each column number followed by the value to be set. * The list is terminated by a -1. For example, to set column 0 with type * %G_TYPE_STRING to "Foo", you would write gtk_list_store_set (store, iter, * 0, "Foo", -1). **/ void gtk_list_store_set (GtkListStore *list_store, GtkTreeIter *iter, ...) { va_list var_args; g_return_if_fail (GTK_IS_LIST_STORE (list_store)); g_return_if_fail (iter != NULL); g_return_if_fail (iter->stamp == list_store->stamp); va_start (var_args, iter); gtk_list_store_set_valist (list_store, iter, var_args); va_end (var_args); } static GSList* remove_link_saving_prev (GSList *list, GSList *link, GSList **prevp) { GSList *tmp; GSList *prev; prev = NULL; tmp = list; while (tmp) { if (tmp == link) { if (prev) prev->next = link->next; if (list == link) list = list->next; link->next = NULL; break; } prev = tmp; tmp = tmp->next; } *prevp = prev; return list; } static void gtk_list_store_remove_silently (GtkListStore *list_store, GtkTreeIter *iter, GtkTreePath *path) { if (G_SLIST (iter->user_data)->data) { _gtk_tree_data_list_free ((GtkTreeDataList *) G_SLIST (iter->user_data)->data, list_store->column_headers); G_SLIST (iter->user_data)->data = NULL; } { GSList *prev = NULL; list_store->root = remove_link_saving_prev (G_SLIST (list_store->root), G_SLIST (iter->user_data), &prev); list_store->length -= 1; if (iter->user_data == list_store->tail) list_store->tail = prev; } } /** * gtk_list_store_remove: * @list_store: A #GtkListStore * @iter: A valid #GtkTreeIter * * Removes the given row from the list store. After being removed, * @iter is set to be the next valid row, or invalidated if it pointed * to the last row in @list_store. * **/ void gtk_list_store_remove (GtkListStore *list_store, GtkTreeIter *iter) { GtkTreePath *path; GSList *next; g_return_if_fail (GTK_IS_LIST_STORE (list_store)); g_return_if_fail (VALID_ITER (iter, list_store)); next = G_SLIST (iter->user_data)->next; path = gtk_list_store_get_path (GTK_TREE_MODEL (list_store), iter); validate_list_store (list_store); gtk_list_store_remove_silently (list_store, iter, path); validate_list_store (list_store); gtk_tree_model_row_deleted (GTK_TREE_MODEL (list_store), path); gtk_tree_path_free (path); if (next) { iter->stamp = list_store->stamp; iter->user_data = next; } else { iter->stamp = 0; } } static void insert_after (GtkListStore *list_store, GSList *sibling, GSList *new_list) { g_return_if_fail (sibling != NULL); g_return_if_fail (new_list != NULL); /* insert new node after list */ new_list->next = sibling->next; sibling->next = new_list; /* if list was the tail, the new node is the new tail */ if (sibling == ((GSList *) list_store->tail)) list_store->tail = new_list; list_store->length += 1; } /** * gtk_list_store_insert: * @list_store: A #GtkListStore * @iter: An unset #GtkTreeIter to set to the new row * @position: position to insert the new row * * Creates a new row at @position. @iter will be changed to point to this new * row. If @position is larger than the number of rows on the list, then the * new row will be appended to the list. The row will be empty before this * function is called. To fill in values, you need to call gtk_list_store_set() * or gtk_list_store_set_value(). * **/ void gtk_list_store_insert (GtkListStore *list_store, GtkTreeIter *iter, gint position) { GSList *list; GtkTreePath *path; GSList *new_list; g_return_if_fail (GTK_IS_LIST_STORE (list_store)); g_return_if_fail (iter != NULL); g_return_if_fail (position >= 0); list_store->columns_dirty = TRUE; if (position == 0 || GTK_LIST_STORE_IS_SORTED (list_store)) { gtk_list_store_prepend (list_store, iter); return; } new_list = g_slist_alloc (); list = g_slist_nth (G_SLIST (list_store->root), position - 1); if (list == NULL) { g_warning ("%s: position %d is off the end of the list\n", G_STRLOC, position); return; } insert_after (list_store, list, new_list); iter->stamp = list_store->stamp; iter->user_data = new_list; validate_list_store (list_store); path = gtk_tree_path_new (); gtk_tree_path_append_index (path, position); gtk_tree_model_row_inserted (GTK_TREE_MODEL (list_store), path, iter); gtk_tree_path_free (path); } /** * gtk_list_store_insert_before: * @list_store: A #GtkListStore * @iter: An unset #GtkTreeIter to set to the new row * @sibling: A valid #GtkTreeIter, or %NULL * * Inserts a new row before @sibling. If @sibling is %NULL, then the row will be * appended to the end of the list. @iter will be changed to point to this new * row. The row will be empty before this function is called. To fill in values, * you need to call gtk_list_store_set() or gtk_list_store_set_value(). * **/ void gtk_list_store_insert_before (GtkListStore *list_store, GtkTreeIter *iter, GtkTreeIter *sibling) { GtkTreePath *path; GSList *list, *prev, *new_list; gint i = 0; g_return_if_fail (GTK_IS_LIST_STORE (list_store)); g_return_if_fail (iter != NULL); if (sibling) g_return_if_fail (VALID_ITER (sibling, list_store)); list_store->columns_dirty = TRUE; if (GTK_LIST_STORE_IS_SORTED (list_store)) { gtk_list_store_prepend (list_store, iter); return; } if (sibling == NULL) { gtk_list_store_append (list_store, iter); return; } new_list = g_slist_alloc (); prev = NULL; list = list_store->root; while (list && list != sibling->user_data) { prev = list; list = list->next; i++; } if (list != sibling->user_data) { g_warning ("%s: sibling iterator invalid? not found in the list", G_STRLOC); return; } /* if there are no nodes, we become the list tail, otherwise we * are inserting before any existing nodes so we can't change * the tail */ if (list_store->root == NULL) list_store->tail = new_list; if (prev) { new_list->next = prev->next; prev->next = new_list; } else { new_list->next = list_store->root; list_store->root = new_list; } iter->stamp = list_store->stamp; iter->user_data = new_list; list_store->length += 1; validate_list_store (list_store); path = gtk_tree_path_new (); gtk_tree_path_append_index (path, i); gtk_tree_model_row_inserted (GTK_TREE_MODEL (list_store), path, iter); gtk_tree_path_free (path); } /** * gtk_list_store_insert_after: * @list_store: A #GtkListStore * @iter: An unset #GtkTreeIter to set to the new row * @sibling: A valid #GtkTreeIter, or %NULL * * Inserts a new row after @sibling. If @sibling is %NULL, then the row will be * prepended to the beginning of the list. @iter will be changed to point to * this new row. The row will be empty after this function is called. To fill * in values, you need to call gtk_list_store_set() or gtk_list_store_set_value(). * **/ void gtk_list_store_insert_after (GtkListStore *list_store, GtkTreeIter *iter, GtkTreeIter *sibling) { GtkTreePath *path; GSList *list, *new_list; gint i = 0; g_return_if_fail (GTK_IS_LIST_STORE (list_store)); g_return_if_fail (iter != NULL); if (sibling) g_return_if_fail (VALID_ITER (sibling, list_store)); list_store->columns_dirty = TRUE; if (sibling == NULL || GTK_LIST_STORE_IS_SORTED (list_store)) { gtk_list_store_prepend (list_store, iter); return; } for (list = list_store->root; list && list != sibling->user_data; list = list->next) i++; g_return_if_fail (list == sibling->user_data); new_list = g_slist_alloc (); insert_after (list_store, list, new_list); iter->stamp = list_store->stamp; iter->user_data = new_list; validate_list_store (list_store); path = gtk_tree_path_new (); gtk_tree_path_append_index (path, i + 1); gtk_tree_model_row_inserted (GTK_TREE_MODEL (list_store), path, iter); gtk_tree_path_free (path); } /** * gtk_list_store_prepend: * @list_store: A #GtkListStore * @iter: An unset #GtkTreeIter to set to the prepend row * * Prepends a new row to @list_store. @iter will be changed to point to this new * row. The row will be empty after this function is called. To fill in * values, you need to call gtk_list_store_set() or gtk_list_store_set_value(). * **/ void gtk_list_store_prepend (GtkListStore *list_store, GtkTreeIter *iter) { GtkTreePath *path; g_return_if_fail (GTK_IS_LIST_STORE (list_store)); g_return_if_fail (iter != NULL); iter->stamp = list_store->stamp; iter->user_data = g_slist_alloc (); list_store->columns_dirty = TRUE; if (list_store->root == NULL) list_store->tail = iter->user_data; G_SLIST (iter->user_data)->next = G_SLIST (list_store->root); list_store->root = iter->user_data; list_store->length += 1; validate_list_store (list_store); path = gtk_tree_path_new (); gtk_tree_path_append_index (path, 0); gtk_tree_model_row_inserted (GTK_TREE_MODEL (list_store), path, iter); gtk_tree_path_free (path); } /** * gtk_list_store_append: * @list_store: A #GtkListStore * @iter: An unset #GtkTreeIter to set to the appended row * * Appends a new row to @list_store. @iter will be changed to point to this new * row. The row will be empty after this function is called. To fill in * values, you need to call gtk_list_store_set() or gtk_list_store_set_value(). * **/ void gtk_list_store_append (GtkListStore *list_store, GtkTreeIter *iter) { GtkTreePath *path; g_return_if_fail (GTK_IS_LIST_STORE (list_store)); g_return_if_fail (iter != NULL); list_store->columns_dirty = TRUE; if (GTK_LIST_STORE_IS_SORTED (list_store)) { gtk_list_store_prepend (list_store, iter); return; } iter->stamp = list_store->stamp; iter->user_data = g_slist_alloc (); if (list_store->tail) ((GSList *)list_store->tail)->next = iter->user_data; else list_store->root = iter->user_data; list_store->tail = iter->user_data; list_store->length += 1; validate_list_store (list_store); path = gtk_tree_path_new (); gtk_tree_path_append_index (path, list_store->length - 1); gtk_tree_model_row_inserted (GTK_TREE_MODEL (list_store), path, iter); gtk_tree_path_free (path); } /** * gtk_list_store_clear: * @list_store: a #GtkListStore. * * Removes all rows from the list store. * **/ void gtk_list_store_clear (GtkListStore *list_store) { GtkTreeIter iter; g_return_if_fail (GTK_IS_LIST_STORE (list_store)); while (list_store->root) { iter.stamp = list_store->stamp; iter.user_data = list_store->root; gtk_list_store_remove (list_store, &iter); } } static gboolean gtk_list_store_drag_data_delete (GtkTreeDragSource *drag_source, GtkTreePath *path) { GtkTreeIter iter; g_return_val_if_fail (GTK_IS_LIST_STORE (drag_source), FALSE); if (gtk_tree_model_get_iter (GTK_TREE_MODEL (drag_source), &iter, path)) { gtk_list_store_remove (GTK_LIST_STORE (drag_source), &iter); return TRUE; } return FALSE; } static gboolean gtk_list_store_drag_data_get (GtkTreeDragSource *drag_source, GtkTreePath *path, GtkSelectionData *selection_data) { g_return_val_if_fail (GTK_IS_LIST_STORE (drag_source), FALSE); /* Note that we don't need to handle the GTK_TREE_MODEL_ROW * target, because the default handler does it for us, but * we do anyway for the convenience of someone maybe overriding the * default handler. */ if (gtk_tree_set_row_drag_data (selection_data, GTK_TREE_MODEL (drag_source), path)) { return TRUE; } else { /* FIXME handle text targets at least. */ } return FALSE; } static gboolean gtk_list_store_drag_data_received (GtkTreeDragDest *drag_dest, GtkTreePath *dest, GtkSelectionData *selection_data) { GtkTreeModel *tree_model; GtkListStore *list_store; GtkTreeModel *src_model = NULL; GtkTreePath *src_path = NULL; gboolean retval = FALSE; g_return_val_if_fail (GTK_IS_LIST_STORE (drag_dest), FALSE); tree_model = GTK_TREE_MODEL (drag_dest); list_store = GTK_LIST_STORE (drag_dest); if (gtk_tree_get_row_drag_data (selection_data, &src_model, &src_path) && src_model == tree_model) { /* Copy the given row to a new position */ GtkTreeIter src_iter; GtkTreeIter dest_iter; GtkTreePath *prev; if (!gtk_tree_model_get_iter (src_model, &src_iter, src_path)) { goto out; } /* Get the path to insert _after_ (dest is the path to insert _before_) */ prev = gtk_tree_path_copy (dest); if (!gtk_tree_path_prev (prev)) { /* dest was the first spot in the list; which means we are supposed * to prepend. */ gtk_list_store_prepend (GTK_LIST_STORE (tree_model), &dest_iter); retval = TRUE; } else { if (gtk_tree_model_get_iter (GTK_TREE_MODEL (tree_model), &dest_iter, prev)) { GtkTreeIter tmp_iter = dest_iter; gtk_list_store_insert_after (GTK_LIST_STORE (tree_model), &dest_iter, &tmp_iter); retval = TRUE; } } gtk_tree_path_free (prev); /* If we succeeded in creating dest_iter, copy data from src */ if (retval) { GtkTreeDataList *dl = G_SLIST (src_iter.user_data)->data; GtkTreeDataList *copy_head = NULL; GtkTreeDataList *copy_prev = NULL; GtkTreeDataList *copy_iter = NULL; GtkTreePath *path; gint col; col = 0; while (dl) { copy_iter = _gtk_tree_data_list_node_copy (dl, list_store->column_headers[col]); if (copy_head == NULL) copy_head = copy_iter; if (copy_prev) copy_prev->next = copy_iter; copy_prev = copy_iter; dl = dl->next; ++col; } dest_iter.stamp = GTK_LIST_STORE (tree_model)->stamp; G_SLIST (dest_iter.user_data)->data = copy_head; path = gtk_list_store_get_path (GTK_TREE_MODEL (tree_model), &dest_iter); gtk_tree_model_row_changed (GTK_TREE_MODEL (tree_model), path, &dest_iter); gtk_tree_path_free (path); } } else { /* FIXME maybe add some data targets eventually, or handle text * targets in the simple case. */ } out: if (src_path) gtk_tree_path_free (src_path); return retval; } static gboolean gtk_list_store_row_drop_possible (GtkTreeDragDest *drag_dest, GtkTreePath *dest_path, GtkSelectionData *selection_data) { gint *indices; GtkTreeModel *src_model = NULL; GtkTreePath *src_path = NULL; gboolean retval = FALSE; g_return_val_if_fail (GTK_IS_LIST_STORE (drag_dest), FALSE); if (!gtk_tree_get_row_drag_data (selection_data, &src_model, &src_path)) goto out; if (src_model != GTK_TREE_MODEL (drag_dest)) goto out; if (gtk_tree_path_get_depth (dest_path) != 1) goto out; /* can drop before any existing node, or before one past any existing. */ indices = gtk_tree_path_get_indices (dest_path); if (indices[0] <= GTK_LIST_STORE (drag_dest)->length) retval = TRUE; out: gtk_tree_path_free (src_path); return retval; } /* Sorting */ typedef struct _SortTuple { gint offset; GSList *el; } SortTuple; static gint gtk_list_store_compare_func (gconstpointer a, gconstpointer b, gpointer user_data) { GtkListStore *list_store = user_data; GSList *el_a; /* Los Angeles? */ GSList *el_b; GtkTreeIter iter_a; GtkTreeIter iter_b; gint retval; GtkTreeIterCompareFunc func; gpointer data; if (list_store->sort_column_id != -1) { GtkTreeDataSortHeader *header; header = _gtk_tree_data_list_get_header (list_store->sort_list, list_store->sort_column_id); g_return_val_if_fail (header != NULL, 0); g_return_val_if_fail (header->func != NULL, 0); func = header->func; data = header->data; } else { g_return_val_if_fail (list_store->default_sort_func != NULL, 0); func = list_store->default_sort_func; data = list_store->default_sort_data; } el_a = ((SortTuple *) a)->el; el_b = ((SortTuple *) b)->el; iter_a.stamp = list_store->stamp; iter_a.user_data = el_a; iter_b.stamp = list_store->stamp; iter_b.user_data = el_b; retval = (* func) (GTK_TREE_MODEL (list_store), &iter_a, &iter_b, data); if (list_store->order == GTK_SORT_DESCENDING) { if (retval > 0) retval = -1; else if (retval < 0) retval = 1; } return retval; } static void gtk_list_store_sort (GtkListStore *list_store) { GArray *sort_array; gint i; gint *new_order; GSList *list; GtkTreePath *path; if (list_store->length <= 1) return; g_assert (GTK_LIST_STORE_IS_SORTED (list_store)); list = G_SLIST (list_store->root); sort_array = g_array_sized_new (FALSE, FALSE, sizeof (SortTuple), list_store->length); for (i = 0; i < list_store->length; i++) { SortTuple tuple; /* If this fails, we are in an inconsistent state. Bad */ g_return_if_fail (list != NULL); tuple.offset = i; tuple.el = list; g_array_append_val (sort_array, tuple); list = list->next; } g_array_sort_with_data (sort_array, gtk_list_store_compare_func, list_store); for (i = 0; i < list_store->length - 1; i++) g_array_index (sort_array, SortTuple, i).el->next = g_array_index (sort_array, SortTuple, i + 1).el; g_array_index (sort_array, SortTuple, list_store->length - 1).el->next = NULL; list_store->root = g_array_index (sort_array, SortTuple, 0).el; /* Let the world know about our new order */ new_order = g_new (gint, list_store->length); for (i = 0; i < list_store->length; i++) new_order[i] = g_array_index (sort_array, SortTuple, i).offset; path = gtk_tree_path_new (); gtk_tree_model_rows_reordered (GTK_TREE_MODEL (list_store), path, NULL, new_order); gtk_tree_path_free (path); g_free (new_order); g_array_free (sort_array, TRUE); } static void gtk_list_store_sort_iter_changed (GtkListStore *list_store, GtkTreeIter *iter, gint column) { GSList *prev = NULL; GSList *next = NULL; GSList *list = G_SLIST (list_store->root); GtkTreePath *tmp_path; GtkTreeIter tmp_iter; gint cmp_a = 0; gint cmp_b = 0; gint i; gint old_location; gint new_location; gint *new_order; GtkTreeIterCompareFunc func; gpointer data; if (list_store->length < 2) return; tmp_iter.stamp = list_store->stamp; if (list_store->sort_column_id != -1) { GtkTreeDataSortHeader *header; header = _gtk_tree_data_list_get_header (list_store->sort_list, list_store->sort_column_id); g_return_if_fail (header != NULL); g_return_if_fail (header->func != NULL); func = header->func; data = header->data; } else { g_return_if_fail (list_store->default_sort_func != NULL); func = list_store->default_sort_func; data = list_store->default_sort_data; } /* If it's the built in function, we don't sort. */ if (func == gtk_tree_data_list_compare_func && list_store->sort_column_id != column) return; old_location = 0; /* First we find the iter, its prev, and its next */ while (list) { if (list == G_SLIST (iter->user_data)) break; prev = list; list = list->next; old_location++; } g_assert (list != NULL); next = list->next; /* Check the common case, where we don't need to sort it moved. */ if (prev != NULL) { tmp_iter.user_data = prev; cmp_a = (* func) (GTK_TREE_MODEL (list_store), &tmp_iter, iter, data); } if (next != NULL) { tmp_iter.user_data = next; cmp_b = (* func) (GTK_TREE_MODEL (list_store), iter, &tmp_iter, data); } if (list_store->order == GTK_SORT_DESCENDING) { if (cmp_a < 0) cmp_a = 1; else if (cmp_a > 0) cmp_a = -1; if (cmp_b < 0) cmp_b = 1; else if (cmp_b > 0) cmp_b = -1; } if (prev == NULL && cmp_b <= 0) return; else if (next == NULL && cmp_a <= 0) return; else if (prev != NULL && next != NULL && cmp_a <= 0 && cmp_b <= 0) return; /* We actually need to sort it */ /* First, remove the old link. */ if (prev == NULL) list_store->root = next; else prev->next = next; if (next == NULL) list_store->tail = prev; list->next = NULL; /* FIXME: as an optimization, we can potentially start at next */ prev = NULL; list = G_SLIST (list_store->root); new_location = 0; tmp_iter.user_data = list; if (list_store->order == GTK_SORT_DESCENDING) cmp_a = (* func) (GTK_TREE_MODEL (list_store), &tmp_iter, iter, data); else cmp_a = (* func) (GTK_TREE_MODEL (list_store), iter, &tmp_iter, data); while ((list->next) && (cmp_a > 0)) { prev = list; list = list->next; new_location++; tmp_iter.user_data = list; if (list_store->order == GTK_SORT_DESCENDING) cmp_a = (* func) (GTK_TREE_MODEL (list_store), &tmp_iter, iter, data); else cmp_a = (* func) (GTK_TREE_MODEL (list_store), iter, &tmp_iter, data); } if ((!list->next) && (cmp_a > 0)) { new_location++; list->next = G_SLIST (iter->user_data); list_store->tail = list->next; } else if (prev) { prev->next = G_SLIST (iter->user_data); G_SLIST (iter->user_data)->next = list; } else { G_SLIST (iter->user_data)->next = G_SLIST (list_store->root); list_store->root = G_SLIST (iter->user_data); } /* Emit the reordered signal. */ new_order = g_new (int, list_store->length); if (old_location < new_location) for (i = 0; i < list_store->length; i++) { if (i < old_location || i > new_location) new_order[i] = i; else if (i >= old_location && i < new_location) new_order[i] = i + 1; else if (i == new_location) new_order[i] = old_location; } else for (i = 0; i < list_store->length; i++) { if (i < new_location || i > old_location) new_order[i] = i; else if (i > new_location && i <= old_location) new_order[i] = i - 1; else if (i == new_location) new_order[i] = old_location; } tmp_path = gtk_tree_path_new (); tmp_iter.user_data = NULL; gtk_tree_model_rows_reordered (GTK_TREE_MODEL (list_store), tmp_path, NULL, new_order); gtk_tree_path_free (tmp_path); g_free (new_order); } static gboolean gtk_list_store_get_sort_column_id (GtkTreeSortable *sortable, gint *sort_column_id, GtkSortType *order) { GtkListStore *list_store = (GtkListStore *) sortable; g_return_val_if_fail (GTK_IS_LIST_STORE (sortable), FALSE); if (list_store->sort_column_id == -1) return FALSE; if (sort_column_id) * sort_column_id = list_store->sort_column_id; if (order) * order = list_store->order; return TRUE; } static void gtk_list_store_set_sort_column_id (GtkTreeSortable *sortable, gint sort_column_id, GtkSortType order) { GtkListStore *list_store = (GtkListStore *) sortable; g_return_if_fail (GTK_IS_LIST_STORE (sortable)); if ((list_store->sort_column_id == sort_column_id) && (list_store->order == order)) return; if (sort_column_id != -1) { GtkTreeDataSortHeader *header = NULL; header = _gtk_tree_data_list_get_header (list_store->sort_list, sort_column_id); /* We want to make sure that we have a function */ g_return_if_fail (header != NULL); g_return_if_fail (header->func != NULL); } else { g_return_if_fail (list_store->default_sort_func != NULL); } list_store->sort_column_id = sort_column_id; list_store->order = order; gtk_list_store_sort (list_store); gtk_tree_sortable_sort_column_changed (sortable); } static void gtk_list_store_set_sort_func (GtkTreeSortable *sortable, gint sort_column_id, GtkTreeIterCompareFunc func, gpointer data, GtkDestroyNotify destroy) { GtkListStore *list_store = (GtkListStore *) sortable; GtkTreeDataSortHeader *header = NULL; GList *list; g_return_if_fail (GTK_IS_LIST_STORE (sortable)); g_return_if_fail (func != NULL); for (list = list_store->sort_list; list; list = list->next) { header = (GtkTreeDataSortHeader*) list->data; if (header->sort_column_id == sort_column_id) break; } if (header == NULL) { header = g_new0 (GtkTreeDataSortHeader, 1); header->sort_column_id = sort_column_id; list_store->sort_list = g_list_append (list_store->sort_list, header); } if (header->destroy) (* header->destroy) (header->data); header->func = func; header->data = data; header->destroy = destroy; } static void gtk_list_store_set_default_sort_func (GtkTreeSortable *sortable, GtkTreeIterCompareFunc func, gpointer data, GtkDestroyNotify destroy) { GtkListStore *list_store = (GtkListStore *) sortable; g_return_if_fail (GTK_IS_LIST_STORE (sortable)); if (list_store->default_sort_destroy) (* list_store->default_sort_destroy) (list_store->default_sort_data); list_store->default_sort_func = func; list_store->default_sort_data = data; list_store->default_sort_destroy = destroy; } static gboolean gtk_list_store_has_default_sort_func (GtkTreeSortable *sortable) { GtkListStore *list_store = (GtkListStore *) sortable; g_return_val_if_fail (GTK_IS_LIST_STORE (sortable), FALSE); return (list_store->default_sort_func != NULL); }