forked from AuroraMiddleware/gtk
161 lines
4.3 KiB
C
161 lines
4.3 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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#include "config.h"
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#include "gtkcustomsorter.h"
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#include "gtktypebuiltins.h"
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/**
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* GtkCustomSorter:
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*
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* `GtkCustomSorter` is a `GtkSorter` implementation that sorts via a callback
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* function.
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*/
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struct _GtkCustomSorter
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{
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GtkSorter parent_instance;
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GCompareDataFunc sort_func;
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gpointer user_data;
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GDestroyNotify user_destroy;
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};
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G_DEFINE_TYPE (GtkCustomSorter, gtk_custom_sorter, GTK_TYPE_SORTER)
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static GtkOrdering
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gtk_custom_sorter_compare (GtkSorter *sorter,
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gpointer item1,
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gpointer item2)
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{
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GtkCustomSorter *self = GTK_CUSTOM_SORTER (sorter);
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if (!self->sort_func)
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return GTK_ORDERING_EQUAL;
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return gtk_ordering_from_cmpfunc (self->sort_func (item1, item2, self->user_data));
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}
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static GtkSorterOrder
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gtk_custom_sorter_get_order (GtkSorter *sorter)
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{
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GtkCustomSorter *self = GTK_CUSTOM_SORTER (sorter);
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if (!self->sort_func)
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return GTK_SORTER_ORDER_NONE;
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return GTK_SORTER_ORDER_PARTIAL;
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}
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static void
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gtk_custom_sorter_dispose (GObject *object)
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{
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GtkCustomSorter *self = GTK_CUSTOM_SORTER (object);
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if (self->user_destroy)
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self->user_destroy (self->user_data);
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self->sort_func = NULL;
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self->user_destroy = NULL;
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self->user_data = NULL;
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G_OBJECT_CLASS (gtk_custom_sorter_parent_class)->dispose (object);
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}
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static void
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gtk_custom_sorter_class_init (GtkCustomSorterClass *class)
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{
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GtkSorterClass *sorter_class = GTK_SORTER_CLASS (class);
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GObjectClass *object_class = G_OBJECT_CLASS (class);
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sorter_class->compare = gtk_custom_sorter_compare;
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sorter_class->get_order = gtk_custom_sorter_get_order;
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object_class->dispose = gtk_custom_sorter_dispose;
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}
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static void
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gtk_custom_sorter_init (GtkCustomSorter *self)
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{
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}
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/**
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* gtk_custom_sorter_new:
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* @sort_func: (nullable): the `GCompareDataFunc` to use for sorting
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* @user_data: (nullable): user data to pass to @sort_func
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* @user_destroy: (nullable): destroy notify for @user_data
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*
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* Creates a new `GtkSorter` that works by calling
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* @sort_func to compare items.
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*
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* If @sort_func is %NULL, all items are considered equal.
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*
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* Returns: a new `GtkCustomSorter`
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*/
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GtkCustomSorter *
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gtk_custom_sorter_new (GCompareDataFunc sort_func,
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gpointer user_data,
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GDestroyNotify user_destroy)
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{
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GtkCustomSorter *sorter;
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sorter = g_object_new (GTK_TYPE_CUSTOM_SORTER, NULL);
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gtk_custom_sorter_set_sort_func (sorter, sort_func, user_data, user_destroy);
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return sorter;
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}
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/**
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* gtk_custom_sorter_set_sort_func:
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* @self: a `GtkCustomSorter`
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* @sort_func: (nullable): function to sort items
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* @user_data: (nullable): user data to pass to @match_func
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* @user_destroy: destroy notify for @user_data
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*
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* Sets (or unsets) the function used for sorting items.
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*
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* If @sort_func is %NULL, all items are considered equal.
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*
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* If the sort func changes its sorting behavior,
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* gtk_sorter_changed() needs to be called.
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*
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* If a previous function was set, its @user_destroy will be
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* called now.
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*/
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void
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gtk_custom_sorter_set_sort_func (GtkCustomSorter *self,
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GCompareDataFunc sort_func,
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gpointer user_data,
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GDestroyNotify user_destroy)
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{
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g_return_if_fail (GTK_IS_CUSTOM_SORTER (self));
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g_return_if_fail (sort_func || (user_data == NULL && !user_destroy));
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if (self->user_destroy)
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self->user_destroy (self->user_data);
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self->sort_func = sort_func;
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self->user_data = user_data;
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self->user_destroy = user_destroy;
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gtk_sorter_changed (GTK_SORTER (self), GTK_SORTER_CHANGE_DIFFERENT);
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}
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