forked from AuroraMiddleware/gtk
158 lines
4.2 KiB
C
158 lines
4.2 KiB
C
/*
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* Copyright © 2019 Benjamin Otte
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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: Benjamin Otte <otte@gnome.org>
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*/
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#include "config.h"
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#include "gtkcustomfilter.h"
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#include "gtktypebuiltins.h"
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/**
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* GtkCustomFilter:
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*
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* `GtkCustomFilter` determines whether to include items with a callback.
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*/
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struct _GtkCustomFilter
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{
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GtkFilter parent_instance;
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GtkCustomFilterFunc match_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 (GtkCustomFilter, gtk_custom_filter, GTK_TYPE_FILTER)
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static gboolean
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gtk_custom_filter_match (GtkFilter *filter,
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gpointer item)
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{
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GtkCustomFilter *self = GTK_CUSTOM_FILTER (filter);
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if (!self->match_func)
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return TRUE;
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return self->match_func (item, self->user_data);
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}
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static GtkFilterMatch
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gtk_custom_filter_get_strictness (GtkFilter *filter)
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{
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GtkCustomFilter *self = GTK_CUSTOM_FILTER (filter);
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if (!self->match_func)
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return GTK_FILTER_MATCH_ALL;
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return GTK_FILTER_MATCH_SOME;
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}
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static void
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gtk_custom_filter_dispose (GObject *object)
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{
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GtkCustomFilter *self = GTK_CUSTOM_FILTER (object);
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if (self->user_destroy)
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self->user_destroy (self->user_data);
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G_OBJECT_CLASS (gtk_custom_filter_parent_class)->dispose (object);
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}
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static void
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gtk_custom_filter_class_init (GtkCustomFilterClass *class)
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{
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GtkFilterClass *filter_class = GTK_FILTER_CLASS (class);
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GObjectClass *object_class = G_OBJECT_CLASS (class);
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filter_class->match = gtk_custom_filter_match;
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filter_class->get_strictness = gtk_custom_filter_get_strictness;
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object_class->dispose = gtk_custom_filter_dispose;
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}
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static void
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gtk_custom_filter_init (GtkCustomFilter *self)
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{
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}
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/**
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* gtk_custom_filter_new:
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* @match_func: (nullable): function to filter 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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* Creates a new filter using the given @match_func to filter
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* items.
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*
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* If @match_func is %NULL, the filter matches all items.
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*
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* If the filter func changes its filtering behavior,
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* gtk_filter_changed() needs to be called.
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*
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* Returns: a new `GtkCustomFilter`
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**/
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GtkCustomFilter *
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gtk_custom_filter_new (GtkCustomFilterFunc match_func,
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gpointer user_data,
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GDestroyNotify user_destroy)
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{
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GtkCustomFilter *result;
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result = g_object_new (GTK_TYPE_CUSTOM_FILTER, NULL);
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gtk_custom_filter_set_filter_func (result, match_func, user_data, user_destroy);
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return result;
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}
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/**
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* gtk_custom_filter_set_filter_func:
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* @self: a `GtkCustomFilter`
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* @match_func: (nullable): function to filter 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 the function used for filtering items.
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*
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* If @match_func is %NULL, the filter matches all items.
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*
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* If the filter func changes its filtering behavior,
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* gtk_filter_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_filter_set_filter_func (GtkCustomFilter *self,
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GtkCustomFilterFunc match_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_FILTER (self));
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g_return_if_fail (match_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->match_func = match_func;
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self->user_data = user_data;
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self->user_destroy = user_destroy;
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gtk_filter_changed (GTK_FILTER (self), GTK_FILTER_CHANGE_DIFFERENT);
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}
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