/* gtktreesortable.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, see . */ #include "config.h" #include "gtktreesortable.h" #include "gtkmarshalers.h" #include "gtkintl.h" /** * SECTION:gtktreesortable * @Short_description: The interface for sortable models used by GtkTreeView * @Title: GtkTreeSortable * @See_also:#GtkTreeModel, #GtkTreeView * * #GtkTreeSortable is an interface to be implemented by tree models which * support sorting. The #GtkTreeView uses the methods provided by this interface * to sort the model. */ static void gtk_tree_sortable_base_init (gpointer g_class); GType gtk_tree_sortable_get_type (void) { static GType tree_sortable_type = 0; if (! tree_sortable_type) { const GTypeInfo tree_sortable_info = { sizeof (GtkTreeSortableIface), /* class_size */ gtk_tree_sortable_base_init, /* base_init */ NULL, /* base_finalize */ NULL, NULL, /* class_finalize */ NULL, /* class_data */ 0, 0, NULL }; tree_sortable_type = g_type_register_static (G_TYPE_INTERFACE, I_("GtkTreeSortable"), &tree_sortable_info, 0); g_type_interface_add_prerequisite (tree_sortable_type, GTK_TYPE_TREE_MODEL); } return tree_sortable_type; } static void gtk_tree_sortable_base_init (gpointer g_class) { static gboolean initialized = FALSE; if (! initialized) { /** * GtkTreeSortable::sort-column-changed: * @sortable: the object on which the signal is emitted * * The ::sort-column-changed signal is emitted when the sort column * or sort order of @sortable is changed. The signal is emitted before * the contents of @sortable are resorted. */ g_signal_new (I_("sort-column-changed"), GTK_TYPE_TREE_SORTABLE, G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GtkTreeSortableIface, sort_column_changed), NULL, NULL, NULL, G_TYPE_NONE, 0); initialized = TRUE; } } /** * gtk_tree_sortable_sort_column_changed: * @sortable: A #GtkTreeSortable * * Emits a #GtkTreeSortable::sort-column-changed signal on @sortable. */ void gtk_tree_sortable_sort_column_changed (GtkTreeSortable *sortable) { g_return_if_fail (GTK_IS_TREE_SORTABLE (sortable)); g_signal_emit_by_name (sortable, "sort-column-changed"); } /** * gtk_tree_sortable_get_sort_column_id: * @sortable: A #GtkTreeSortable * @sort_column_id: (out): The sort column id to be filled in * @order: (out): The #GtkSortType to be filled in * * Fills in @sort_column_id and @order with the current sort column and the * order. It returns %TRUE unless the @sort_column_id is * %GTK_TREE_SORTABLE_DEFAULT_SORT_COLUMN_ID or * %GTK_TREE_SORTABLE_UNSORTED_SORT_COLUMN_ID. * * Returns: %TRUE if the sort column is not one of the special sort * column ids. **/ gboolean gtk_tree_sortable_get_sort_column_id (GtkTreeSortable *sortable, int *sort_column_id, GtkSortType *order) { GtkTreeSortableIface *iface; g_return_val_if_fail (GTK_IS_TREE_SORTABLE (sortable), FALSE); iface = GTK_TREE_SORTABLE_GET_IFACE (sortable); g_return_val_if_fail (iface != NULL, FALSE); g_return_val_if_fail (iface->get_sort_column_id != NULL, FALSE); return (* iface->get_sort_column_id) (sortable, sort_column_id, order); } /** * gtk_tree_sortable_set_sort_column_id: * @sortable: A #GtkTreeSortable * @sort_column_id: the sort column id to set * @order: The sort order of the column * * Sets the current sort column to be @sort_column_id. The @sortable will * resort itself to reflect this change, after emitting a * #GtkTreeSortable::sort-column-changed signal. @sort_column_id may either be * a regular column id, or one of the following special values: * * - %GTK_TREE_SORTABLE_DEFAULT_SORT_COLUMN_ID: the default sort function * will be used, if it is set * * - %GTK_TREE_SORTABLE_UNSORTED_SORT_COLUMN_ID: no sorting will occur */ void gtk_tree_sortable_set_sort_column_id (GtkTreeSortable *sortable, int sort_column_id, GtkSortType order) { GtkTreeSortableIface *iface; g_return_if_fail (GTK_IS_TREE_SORTABLE (sortable)); iface = GTK_TREE_SORTABLE_GET_IFACE (sortable); g_return_if_fail (iface != NULL); g_return_if_fail (iface->set_sort_column_id != NULL); (* iface->set_sort_column_id) (sortable, sort_column_id, order); } /** * gtk_tree_sortable_set_sort_func: * @sortable: A #GtkTreeSortable * @sort_column_id: the sort column id to set the function for * @sort_func: The comparison function * @user_data: (closure): User data to pass to @sort_func, or %NULL * @destroy: (allow-none): Destroy notifier of @user_data, or %NULL * * Sets the comparison function used when sorting to be @sort_func. If the * current sort column id of @sortable is the same as @sort_column_id, then * the model will sort using this function. */ void gtk_tree_sortable_set_sort_func (GtkTreeSortable *sortable, int sort_column_id, GtkTreeIterCompareFunc sort_func, gpointer user_data, GDestroyNotify destroy) { GtkTreeSortableIface *iface; g_return_if_fail (GTK_IS_TREE_SORTABLE (sortable)); g_return_if_fail (sort_func != NULL); iface = GTK_TREE_SORTABLE_GET_IFACE (sortable); g_return_if_fail (iface != NULL); g_return_if_fail (iface->set_sort_func != NULL); g_return_if_fail (sort_column_id >= 0); (* iface->set_sort_func) (sortable, sort_column_id, sort_func, user_data, destroy); } /** * gtk_tree_sortable_set_default_sort_func: * @sortable: A #GtkTreeSortable * @sort_func: The comparison function * @user_data: (closure): User data to pass to @sort_func, or %NULL * @destroy: (allow-none): Destroy notifier of @user_data, or %NULL * * Sets the default comparison function used when sorting to be @sort_func. * If the current sort column id of @sortable is * %GTK_TREE_SORTABLE_DEFAULT_SORT_COLUMN_ID, then the model will sort using * this function. * * If @sort_func is %NULL, then there will be no default comparison function. * This means that once the model has been sorted, it can’t go back to the * default state. In this case, when the current sort column id of @sortable * is %GTK_TREE_SORTABLE_DEFAULT_SORT_COLUMN_ID, the model will be unsorted. */ void gtk_tree_sortable_set_default_sort_func (GtkTreeSortable *sortable, GtkTreeIterCompareFunc sort_func, gpointer user_data, GDestroyNotify destroy) { GtkTreeSortableIface *iface; g_return_if_fail (GTK_IS_TREE_SORTABLE (sortable)); iface = GTK_TREE_SORTABLE_GET_IFACE (sortable); g_return_if_fail (iface != NULL); g_return_if_fail (iface->set_default_sort_func != NULL); (* iface->set_default_sort_func) (sortable, sort_func, user_data, destroy); } /** * gtk_tree_sortable_has_default_sort_func: * @sortable: A #GtkTreeSortable * * Returns %TRUE if the model has a default sort function. This is used * primarily by GtkTreeViewColumns in order to determine if a model can * go back to the default state, or not. * * Returns: %TRUE, if the model has a default sort function */ gboolean gtk_tree_sortable_has_default_sort_func (GtkTreeSortable *sortable) { GtkTreeSortableIface *iface; g_return_val_if_fail (GTK_IS_TREE_SORTABLE (sortable), FALSE); iface = GTK_TREE_SORTABLE_GET_IFACE (sortable); g_return_val_if_fail (iface != NULL, FALSE); g_return_val_if_fail (iface->has_default_sort_func != NULL, FALSE); return (* iface->has_default_sort_func) (sortable); }