272 lines
8.5 KiB
C
272 lines
8.5 KiB
C
/* gtktreesortable.c
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* Copyright (C) 2000 Red Hat, Inc., Jonathan Blandford <jrb@redhat.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include "config.h"
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#include "gtktreesortable.h"
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#include "gtkmarshalers.h"
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#include "gtkintl.h"
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/**
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* SECTION:gtktreesortable
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* @Short_description: The interface for sortable models used by GtkTreeView
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* @Title: GtkTreeSortable
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* @See_also:#GtkTreeModel, #GtkTreeView
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*
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* #GtkTreeSortable is an interface to be implemented by tree models which
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* support sorting. The #GtkTreeView uses the methods provided by this interface
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* to sort the model.
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*/
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static void gtk_tree_sortable_base_init (gpointer g_class);
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GType
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gtk_tree_sortable_get_type (void)
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{
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static GType tree_sortable_type = 0;
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if (! tree_sortable_type)
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{
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const GTypeInfo tree_sortable_info =
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{
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sizeof (GtkTreeSortableIface), /* class_size */
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gtk_tree_sortable_base_init, /* base_init */
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NULL, /* base_finalize */
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NULL,
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NULL, /* class_finalize */
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NULL, /* class_data */
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0,
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0,
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NULL
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};
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tree_sortable_type =
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g_type_register_static (G_TYPE_INTERFACE, I_("GtkTreeSortable"),
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&tree_sortable_info, 0);
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g_type_interface_add_prerequisite (tree_sortable_type, GTK_TYPE_TREE_MODEL);
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}
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return tree_sortable_type;
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}
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static void
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gtk_tree_sortable_base_init (gpointer g_class)
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{
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static gboolean initialized = FALSE;
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if (! initialized)
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{
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/**
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* GtkTreeSortable::sort-column-changed:
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* @sortable: the object on which the signal is emitted
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*
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* The ::sort-column-changed signal is emitted when the sort column
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* or sort order of @sortable is changed. The signal is emitted before
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* the contents of @sortable are resorted.
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*/
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g_signal_new (I_("sort-column-changed"),
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GTK_TYPE_TREE_SORTABLE,
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G_SIGNAL_RUN_LAST,
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G_STRUCT_OFFSET (GtkTreeSortableIface, sort_column_changed),
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NULL, NULL,
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_gtk_marshal_VOID__VOID,
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G_TYPE_NONE, 0);
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initialized = TRUE;
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}
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}
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/**
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* gtk_tree_sortable_sort_column_changed:
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* @sortable: A #GtkTreeSortable
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*
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* Emits a #GtkTreeSortable::sort-column-changed signal on @sortable.
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*/
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void
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gtk_tree_sortable_sort_column_changed (GtkTreeSortable *sortable)
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{
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g_return_if_fail (GTK_IS_TREE_SORTABLE (sortable));
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g_signal_emit_by_name (sortable, "sort-column-changed");
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}
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/**
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* gtk_tree_sortable_get_sort_column_id:
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* @sortable: A #GtkTreeSortable
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* @sort_column_id: (out): The sort column id to be filled in
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* @order: (out): The #GtkSortType to be filled in
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*
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* Fills in @sort_column_id and @order with the current sort column and the
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* order. It returns %TRUE unless the @sort_column_id is
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* %GTK_TREE_SORTABLE_DEFAULT_SORT_COLUMN_ID or
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* %GTK_TREE_SORTABLE_UNSORTED_SORT_COLUMN_ID.
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*
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* Return value: %TRUE if the sort column is not one of the special sort
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* column ids.
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**/
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gboolean
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gtk_tree_sortable_get_sort_column_id (GtkTreeSortable *sortable,
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gint *sort_column_id,
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GtkSortType *order)
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{
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GtkTreeSortableIface *iface;
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g_return_val_if_fail (GTK_IS_TREE_SORTABLE (sortable), FALSE);
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iface = GTK_TREE_SORTABLE_GET_IFACE (sortable);
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g_return_val_if_fail (iface != NULL, FALSE);
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g_return_val_if_fail (iface->get_sort_column_id != NULL, FALSE);
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return (* iface->get_sort_column_id) (sortable, sort_column_id, order);
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}
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/**
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* gtk_tree_sortable_set_sort_column_id:
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* @sortable: A #GtkTreeSortable
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* @sort_column_id: the sort column id to set
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* @order: The sort order of the column
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*
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* Sets the current sort column to be @sort_column_id. The @sortable will
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* resort itself to reflect this change, after emitting a
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* #GtkTreeSortable::sort-column-changed signal. @sort_column_id may either be
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* a regular column id, or one of the following special values:
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* <variablelist>
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* <varlistentry>
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* <term>%GTK_TREE_SORTABLE_DEFAULT_SORT_COLUMN_ID</term>
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* <listitem>the default sort function will be used, if it is set</listitem>
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* </varlistentry>
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* <varlistentry>
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* <term>%GTK_TREE_SORTABLE_UNSORTED_SORT_COLUMN_ID</term>
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* <listitem>no sorting will occur</listitem>
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* </varlistentry>
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* </variablelist>
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*/
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void
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gtk_tree_sortable_set_sort_column_id (GtkTreeSortable *sortable,
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gint sort_column_id,
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GtkSortType order)
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{
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GtkTreeSortableIface *iface;
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g_return_if_fail (GTK_IS_TREE_SORTABLE (sortable));
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iface = GTK_TREE_SORTABLE_GET_IFACE (sortable);
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g_return_if_fail (iface != NULL);
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g_return_if_fail (iface->set_sort_column_id != NULL);
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(* iface->set_sort_column_id) (sortable, sort_column_id, order);
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}
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/**
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* gtk_tree_sortable_set_sort_func:
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* @sortable: A #GtkTreeSortable
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* @sort_column_id: the sort column id to set the function for
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* @sort_func: The comparison function
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* @user_data: (allow-none): User data to pass to @sort_func, or %NULL
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* @destroy: (allow-none): Destroy notifier of @user_data, or %NULL
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*
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* Sets the comparison function used when sorting to be @sort_func. If the
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* current sort column id of @sortable is the same as @sort_column_id, then
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* the model will sort using this function.
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*/
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void
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gtk_tree_sortable_set_sort_func (GtkTreeSortable *sortable,
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gint sort_column_id,
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GtkTreeIterCompareFunc sort_func,
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gpointer user_data,
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GDestroyNotify destroy)
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{
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GtkTreeSortableIface *iface;
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g_return_if_fail (GTK_IS_TREE_SORTABLE (sortable));
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g_return_if_fail (sort_func != NULL);
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iface = GTK_TREE_SORTABLE_GET_IFACE (sortable);
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g_return_if_fail (iface != NULL);
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g_return_if_fail (iface->set_sort_func != NULL);
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g_return_if_fail (sort_column_id >= 0);
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(* iface->set_sort_func) (sortable, sort_column_id, sort_func, user_data, destroy);
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}
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/**
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* gtk_tree_sortable_set_default_sort_func:
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* @sortable: A #GtkTreeSortable
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* @sort_func: The comparison function
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* @user_data: (allow-none): User data to pass to @sort_func, or %NULL
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* @destroy: (allow-none): Destroy notifier of @user_data, or %NULL
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*
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* Sets the default comparison function used when sorting to be @sort_func.
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* If the current sort column id of @sortable is
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* %GTK_TREE_SORTABLE_DEFAULT_SORT_COLUMN_ID, then the model will sort using
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* this function.
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*
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* If @sort_func is %NULL, then there will be no default comparison function.
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* This means that once the model has been sorted, it can't go back to the
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* default state. In this case, when the current sort column id of @sortable
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* is %GTK_TREE_SORTABLE_DEFAULT_SORT_COLUMN_ID, the model will be unsorted.
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*/
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void
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gtk_tree_sortable_set_default_sort_func (GtkTreeSortable *sortable,
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GtkTreeIterCompareFunc sort_func,
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gpointer user_data,
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GDestroyNotify destroy)
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{
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GtkTreeSortableIface *iface;
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g_return_if_fail (GTK_IS_TREE_SORTABLE (sortable));
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iface = GTK_TREE_SORTABLE_GET_IFACE (sortable);
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g_return_if_fail (iface != NULL);
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g_return_if_fail (iface->set_default_sort_func != NULL);
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(* iface->set_default_sort_func) (sortable, sort_func, user_data, destroy);
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}
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/**
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* gtk_tree_sortable_has_default_sort_func:
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* @sortable: A #GtkTreeSortable
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*
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* Returns %TRUE if the model has a default sort function. This is used
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* primarily by GtkTreeViewColumns in order to determine if a model can
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* go back to the default state, or not.
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*
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* Return value: %TRUE, if the model has a default sort function
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*/
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gboolean
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gtk_tree_sortable_has_default_sort_func (GtkTreeSortable *sortable)
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{
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GtkTreeSortableIface *iface;
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g_return_val_if_fail (GTK_IS_TREE_SORTABLE (sortable), FALSE);
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iface = GTK_TREE_SORTABLE_GET_IFACE (sortable);
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g_return_val_if_fail (iface != NULL, FALSE);
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g_return_val_if_fail (iface->has_default_sort_func != NULL, FALSE);
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return (* iface->has_default_sort_func) (sortable);
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}
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