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/* gtktreesortable.c
* Copyright (C) 2000 Red Hat, Inc., Jonathan Blandford <jrb@redhat.com>
*
* 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 "gtktreesortable.h"
#include "gtksignal.h"
static void gtk_tree_sortable_base_init (gpointer g_class);
GtkType
gtk_tree_sortable_get_type (void)
{
static GtkType tree_sortable_type = 0;
if (! tree_sortable_type)
{
static 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, "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)
{
g_signal_new ("sort_column_changed",
GTK_TYPE_TREE_SORTABLE,
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkTreeSortableIface, sort_column_changed),
NULL, NULL,
gtk_marshal_VOID__VOID,
G_TYPE_NONE, 0);
initialized = TRUE;
}
}
/**
* gtk_tree_sortable_sort_column_changed:
* @sortable: A #GtkTreeSortable
*
* Emits a GtkTreeSortable::sort_column_changed signal on
**/
void
gtk_tree_sortable_sort_column_changed (GtkTreeSortable *sortable)
{
g_return_if_fail (GTK_IS_TREE_SORTABLE (sortable));
g_signal_emit_by_name (G_OBJECT (sortable),
"sort_column_changed");
}
/**
* gtk_tree_sortable_get_sort_column_id:
* @sortable: A #GtkTreeSortable
* @sort_column_id: The sort column id to be filled in
* @order: The #GtkSortType to be filled in
*
* Fills in @sort_column_id and @order with the current sort column and the
* order, if applicable. If the sort column is not set, then FALSE is returned,
* and the values in @sort_column_id and @order are unchanged.
*
* Return value: %TRUE, if the sort column has been set
**/
gboolean
gtk_tree_sortable_get_sort_column_id (GtkTreeSortable *sortable,
gint *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. If @sort_column_id is
* %GTK_TREE_SORTABLE_DEFAULT_SORT_COLUMN_ID, then the default sort function
* will be used, if it is set.
**/
void
gtk_tree_sortable_set_sort_column_id (GtkTreeSortable *sortable,
gint 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 sorting function
* @user_data: User data to pass to the sort func, or %NULL
* @destroy: 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.
**/
void
gtk_tree_sortable_set_sort_func (GtkTreeSortable *sortable,
gint sort_column_id,
GtkTreeIterCompareFunc sort_func,
gpointer user_data,
GtkDestroyNotify 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_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 sorting function
* @user_data: User data to pass to the sort func, or %NULL
* @destroy: 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. If
* @sort_func is %NULL, then the default sort_func, and there will be no default
* sort_func. In this case, the model is unsorted.
**/
void
gtk_tree_sortable_set_default_sort_func (GtkTreeSortable *sortable,
GtkTreeIterCompareFunc sort_func,
gpointer user_data,
GtkDestroyNotify 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.
*
* Return value: %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);
}
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