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.
22 #include "gtktreesortable.h"
23 #include "gtkmarshalers.h"
25 static void gtk_tree_sortable_base_init (gpointer g_class);
28 gtk_tree_sortable_get_type (void)
30 static GType tree_sortable_type = 0;
32 if (! tree_sortable_type)
34 static const GTypeInfo tree_sortable_info =
36 sizeof (GtkTreeSortableIface), /* class_size */
37 gtk_tree_sortable_base_init, /* base_init */
38 NULL, /* base_finalize */
40 NULL, /* class_finalize */
41 NULL, /* class_data */
48 g_type_register_static (G_TYPE_INTERFACE, "GtkTreeSortable",
49 &tree_sortable_info, 0);
51 g_type_interface_add_prerequisite (tree_sortable_type, GTK_TYPE_TREE_MODEL);
54 return tree_sortable_type;
58 gtk_tree_sortable_base_init (gpointer g_class)
60 static gboolean initialized = FALSE;
64 g_signal_new ("sort_column_changed",
65 GTK_TYPE_TREE_SORTABLE,
67 G_STRUCT_OFFSET (GtkTreeSortableIface, sort_column_changed),
69 _gtk_marshal_VOID__VOID,
76 * gtk_tree_sortable_sort_column_changed:
77 * @sortable: A #GtkTreeSortable
79 * Emits a GtkTreeSortable::sort_column_changed signal on
82 gtk_tree_sortable_sort_column_changed (GtkTreeSortable *sortable)
84 g_return_if_fail (GTK_IS_TREE_SORTABLE (sortable));
86 g_signal_emit_by_name (sortable, "sort_column_changed");
90 * gtk_tree_sortable_get_sort_column_id:
91 * @sortable: A #GtkTreeSortable
92 * @sort_column_id: The sort column id to be filled in
93 * @order: The #GtkSortType to be filled in
95 * Fills in @sort_column_id and @order with the current sort column and the
96 * order, if applicable. If the sort column is not set, then FALSE is returned,
97 * and the values in @sort_column_id and @order are unchanged.
99 * Return value: %TRUE, if the sort column has been set
102 gtk_tree_sortable_get_sort_column_id (GtkTreeSortable *sortable,
103 gint *sort_column_id,
106 GtkTreeSortableIface *iface;
108 g_return_val_if_fail (GTK_IS_TREE_SORTABLE (sortable), FALSE);
110 iface = GTK_TREE_SORTABLE_GET_IFACE (sortable);
112 g_return_val_if_fail (iface != NULL, FALSE);
113 g_return_val_if_fail (iface->get_sort_column_id != NULL, FALSE);
115 return (* iface->get_sort_column_id) (sortable, sort_column_id, order);
119 * gtk_tree_sortable_set_sort_column_id:
120 * @sortable: A #GtkTreeSortable
121 * @sort_column_id: the sort column id to set
122 * @order: The sort order of the column
124 * Sets the current sort column to be @sort_column_id. The @sortable will
125 * resort itself to reflect this change, after emitting a
126 * GtkTreeSortable::sort_column_changed signal. If @sort_column_id is
127 * %GTK_TREE_SORTABLE_DEFAULT_SORT_COLUMN_ID, then the default sort function
128 * will be used, if it is set.
131 gtk_tree_sortable_set_sort_column_id (GtkTreeSortable *sortable,
135 GtkTreeSortableIface *iface;
137 g_return_if_fail (GTK_IS_TREE_SORTABLE (sortable));
139 iface = GTK_TREE_SORTABLE_GET_IFACE (sortable);
141 g_return_if_fail (iface != NULL);
142 g_return_if_fail (iface->set_sort_column_id != NULL);
144 (* iface->set_sort_column_id) (sortable, sort_column_id, order);
148 * gtk_tree_sortable_set_sort_func:
149 * @sortable: A #GtkTreeSortable
150 * @sort_column_id: the sort column id to set the function for
151 * @sort_func: The sorting function
152 * @user_data: User data to pass to the sort func, or %NULL
153 * @destroy: Destroy notifier of @user_data, or %NULL
155 * Sets the comparison function used when sorting to be @sort_func. If the
156 * current sort column id of @sortable is the same as @sort_column_id, then the
157 * model will sort using this function.
160 gtk_tree_sortable_set_sort_func (GtkTreeSortable *sortable,
162 GtkTreeIterCompareFunc sort_func,
164 GtkDestroyNotify destroy)
166 GtkTreeSortableIface *iface;
168 g_return_if_fail (GTK_IS_TREE_SORTABLE (sortable));
170 iface = GTK_TREE_SORTABLE_GET_IFACE (sortable);
172 g_return_if_fail (iface != NULL);
173 g_return_if_fail (iface->set_sort_func != NULL);
174 g_return_if_fail (sort_column_id >= 0);
176 (* iface->set_sort_func) (sortable, sort_column_id, sort_func, user_data, destroy);
180 * gtk_tree_sortable_set_default_sort_func:
181 * @sortable: A #GtkTreeSortable
182 * @sort_func: The sorting function
183 * @user_data: User data to pass to the sort func, or %NULL
184 * @destroy: Destroy notifier of @user_data, or %NULL
186 * Sets the default comparison function used when sorting to be @sort_func. If
187 * the current sort column id of @sortable is
188 * %GTK_TREE_SORTABLE_DEFAULT_SORT_COLUMN_ID, then the model will sort using this function.
190 * If @sort_func is %NULL, then there will be no default comparison function.
191 * This means that once the model has been sorted, it can't go back to the
192 * default state. In this case, when the current sort column id of @sortable is
193 * GTK_TREE_SORTABLE_DEFAULT_SORT_COLUMN_ID, the model will be unsorted.
196 gtk_tree_sortable_set_default_sort_func (GtkTreeSortable *sortable,
197 GtkTreeIterCompareFunc sort_func,
199 GtkDestroyNotify destroy)
201 GtkTreeSortableIface *iface;
203 g_return_if_fail (GTK_IS_TREE_SORTABLE (sortable));
205 iface = GTK_TREE_SORTABLE_GET_IFACE (sortable);
207 g_return_if_fail (iface != NULL);
208 g_return_if_fail (iface->set_default_sort_func != NULL);
210 (* iface->set_default_sort_func) (sortable, sort_func, user_data, destroy);
214 * gtk_tree_sortable_has_default_sort_func:
215 * @sortable: A #GtkTreeSortable
217 * Returns %TRUE if the model has a default sort function. This is used
218 * primarily by GtkTreeViewColumns in order to determine if a model can go back
219 * to the default state, or not.
221 * Return value: %TRUE, if the model has a default sort function
224 gtk_tree_sortable_has_default_sort_func (GtkTreeSortable *sortable)
226 GtkTreeSortableIface *iface;
228 g_return_val_if_fail (GTK_IS_TREE_SORTABLE (sortable), FALSE);
230 iface = GTK_TREE_SORTABLE_GET_IFACE (sortable);
232 g_return_val_if_fail (iface != NULL, FALSE);
233 g_return_val_if_fail (iface->has_default_sort_func != NULL, FALSE);
235 return (* iface->has_default_sort_func) (sortable);