forked from AuroraMiddleware/gtk
125 lines
4.5 KiB
C
125 lines
4.5 KiB
C
/*
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* Copyright © 2019 Matthias Clasen
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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 Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 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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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser 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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* Authors: Matthias Clasen <mclasen@redhat.com>
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*/
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#ifndef __GTK_SORTER_H__
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#define __GTK_SORTER_H__
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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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#include <gdk/gdk.h>
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#include <gtk/gtkenums.h>
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G_BEGIN_DECLS
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/**
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* GtkSorterOrder:
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* @GTK_SORTER_ORDER_PARTIAL: A partial order. And #GtkOrdering is possible.
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* @GTK_SORTER_ORDER_INVALID: An invalid order. gtk_sorter_compare() will
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* always return %GTK_ORDERING_INVALID if both items are unequal.
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* @GTK_SORTER_ORDER_NONE: No order, all elements are considered equal.
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* gtk_sorter_compare() will only return %GTK_ORDERING_EQUAL or
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* %GTK_ORDERING_INVALID.
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* @GTK_SORTER_ORDER_TOTAL: A total order. gtk_sorter_compare() will only
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* return %GTK_ORDERING_EQUAL if an item is compared with itself. Two
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* different items will never cause this value to be returned.
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*
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* Describes the type of order that a #GtkSorter may describe.
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*/
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typedef enum {
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GTK_SORTER_ORDER_PARTIAL,
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GTK_SORTER_ORDER_NONE,
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GTK_SORTER_ORDER_TOTAL
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} GtkSorterOrder;
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/**
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* GtkSorterChange:
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* @GTK_SORTER_CHANGE_DIFFERENT: The sorter change cannot be described
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* by any of the other enumeration values
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* @GTK_SORTER_CHANGE_INVERTED: The sort order was inverted. Comparisons
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* that returned %GTK_ORDERING_SMALLER now return %GTK_ORDERING_LARGER
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* and vice versa. Other comparisons return the same values as before.
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* @GTK_SORTER_CHANGE_LESS_STRICT: The sorter is less strict: Comparisons
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* may now return %GTK_ORDERING_EQUAL that did not do so before.
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* @GTK_SORTER_CHANGE_MORE_STRICT: The sorter is more strict: Comparisons
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* that did return %GTK_ORDERING_EQUAL may not do so anymore.
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*
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* Describes changes in a sorter in more detail and allows users
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* to optimize resorting.
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*/
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typedef enum {
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GTK_SORTER_CHANGE_DIFFERENT,
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GTK_SORTER_CHANGE_INVERTED,
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GTK_SORTER_CHANGE_LESS_STRICT,
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GTK_SORTER_CHANGE_MORE_STRICT
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} GtkSorterChange;
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#define GTK_TYPE_SORTER (gtk_sorter_get_type ())
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GDK_AVAILABLE_IN_ALL
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G_DECLARE_DERIVABLE_TYPE (GtkSorter, gtk_sorter, GTK, SORTER, GObject)
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/**
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* GtkSorterClass
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* @compare: Compare two items. See gtk_sorter_compare() for details.
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* @get_order: Get the #GtkSorderOrder that applies to the current sorter.
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* If unimplemented, it returns %GTK_SORTER_ORDER_PARTIAL.
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*
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* The virtual table for #GtkSorter.
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*/
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struct _GtkSorterClass
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{
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GObjectClass parent_class;
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GtkOrdering (* compare) (GtkSorter *self,
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gpointer item1,
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gpointer item2);
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/* optional */
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GtkSorterOrder (* get_order) (GtkSorter *self);
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/* Padding for future expansion */
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void (*_gtk_reserved1) (void);
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void (*_gtk_reserved2) (void);
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void (*_gtk_reserved3) (void);
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void (*_gtk_reserved4) (void);
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void (*_gtk_reserved5) (void);
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void (*_gtk_reserved6) (void);
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void (*_gtk_reserved7) (void);
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void (*_gtk_reserved8) (void);
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};
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GDK_AVAILABLE_IN_ALL
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GtkOrdering gtk_sorter_compare (GtkSorter *self,
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gpointer item1,
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gpointer item2);
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GDK_AVAILABLE_IN_ALL
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GtkSorterOrder gtk_sorter_get_order (GtkSorter *self);
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/* for sorter implementations */
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GDK_AVAILABLE_IN_ALL
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void gtk_sorter_changed (GtkSorter *self,
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GtkSorterChange change);
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G_END_DECLS
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#endif /* __GTK_SORTER_H__ */
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