forked from AuroraMiddleware/gtk
124 lines
5.0 KiB
C
124 lines
5.0 KiB
C
/* gtktreesortable.h
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* Copyright (C) 2001 Red Hat, Inc.
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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, see <http://www.gnu.org/licenses/>.
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*/
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#if !defined (__GTK_H_INSIDE__) && !defined (GTK_COMPILATION)
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#error "Only <gtk/gtk.h> can be included directly."
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#endif
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#ifndef __GTK_TREE_SORTABLE_H__
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#define __GTK_TREE_SORTABLE_H__
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#include <gtk/gtkenums.h>
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#include <gtk/gtktreemodel.h>
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G_BEGIN_DECLS
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#define GTK_TYPE_TREE_SORTABLE (gtk_tree_sortable_get_type ())
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#define GTK_TREE_SORTABLE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GTK_TYPE_TREE_SORTABLE, GtkTreeSortable))
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#define GTK_TREE_SORTABLE_CLASS(obj) (G_TYPE_CHECK_CLASS_CAST ((obj), GTK_TYPE_TREE_SORTABLE, GtkTreeSortableIface))
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#define GTK_IS_TREE_SORTABLE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GTK_TYPE_TREE_SORTABLE))
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#define GTK_TREE_SORTABLE_GET_IFACE(obj) (G_TYPE_INSTANCE_GET_INTERFACE ((obj), GTK_TYPE_TREE_SORTABLE, GtkTreeSortableIface))
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enum {
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GTK_TREE_SORTABLE_DEFAULT_SORT_COLUMN_ID = -1,
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GTK_TREE_SORTABLE_UNSORTED_SORT_COLUMN_ID = -2
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};
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typedef struct _GtkTreeSortable GtkTreeSortable; /* Dummy typedef */
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typedef struct _GtkTreeSortableIface GtkTreeSortableIface;
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/**
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* GtkTreeIterCompareFunc:
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* @model: The #GtkTreeModel the comparison is within
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* @a: A #GtkTreeIter in @model
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* @b: Another #GtkTreeIter in @model
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* @user_data: Data passed when the compare func is assigned e.g. by
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* gtk_tree_sortable_set_sort_func()
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*
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* A GtkTreeIterCompareFunc should return a negative integer, zero, or a positive
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* integer if @a sorts before @b, @a sorts with @b, or @a sorts after @b
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* respectively. If two iters compare as equal, their order in the sorted model
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* is undefined. In order to ensure that the #GtkTreeSortable behaves as
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* expected, the GtkTreeIterCompareFunc must define a partial order on
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* the model, i.e. it must be reflexive, antisymmetric and transitive.
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*
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* For example, if @model is a product catalogue, then a compare function
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* for the "price" column could be one which returns
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* <literal>price_of(@a) - price_of(@b)</literal>.
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*
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* Returns: a negative integer, zero or a positive integer depending on whether
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* @a sorts before, with or after @b
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*/
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typedef gint (* GtkTreeIterCompareFunc) (GtkTreeModel *model,
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GtkTreeIter *a,
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GtkTreeIter *b,
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gpointer user_data);
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struct _GtkTreeSortableIface
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{
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GTypeInterface g_iface;
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/* signals */
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void (* sort_column_changed) (GtkTreeSortable *sortable);
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/* virtual table */
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gboolean (* get_sort_column_id) (GtkTreeSortable *sortable,
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gint *sort_column_id,
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GtkSortType *order);
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void (* set_sort_column_id) (GtkTreeSortable *sortable,
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gint sort_column_id,
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GtkSortType order);
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void (* 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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void (* 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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gboolean (* has_default_sort_func) (GtkTreeSortable *sortable);
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};
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GType gtk_tree_sortable_get_type (void) G_GNUC_CONST;
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void gtk_tree_sortable_sort_column_changed (GtkTreeSortable *sortable);
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gboolean 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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void 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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void 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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void 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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gboolean gtk_tree_sortable_has_default_sort_func (GtkTreeSortable *sortable);
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G_END_DECLS
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#endif /* __GTK_TREE_SORTABLE_H__ */
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