gimp/app/config/gimpconfig-utils.c

225 lines
7.4 KiB
C

/* The GIMP -- an image manipulation program
* Copyright (C) 1995-1997 Spencer Kimball and Peter Mattis
*
* Utitility functions for GimpConfig.
* Copyright (C) 2001-2003 Sven Neumann <sven@gimp.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include <glib-object.h>
#include "libgimpbase/gimpbase.h"
#include "libgimpconfig/gimpconfig.h"
#include "config-types.h"
#include "gimpconfig-utils.h"
static void
gimp_config_connect_notify (GObject *src,
GParamSpec *param_spec,
GObject *dest)
{
if (param_spec->flags & G_PARAM_READABLE)
{
GParamSpec *dest_spec;
dest_spec = g_object_class_find_property (G_OBJECT_GET_CLASS (dest),
param_spec->name);
if (dest_spec &&
(dest_spec->value_type == param_spec->value_type) &&
(dest_spec->flags & G_PARAM_WRITABLE) &&
(dest_spec->flags & G_PARAM_CONSTRUCT_ONLY) == 0)
{
GValue value = { 0, };
g_value_init (&value, param_spec->value_type);
g_object_get_property (src, param_spec->name, &value);
g_signal_handlers_block_by_func (dest,
gimp_config_connect_notify, src);
g_object_set_property (dest, param_spec->name, &value);
g_signal_handlers_unblock_by_func (dest,
gimp_config_connect_notify, src);
g_value_unset (&value);
}
}
}
/**
* gimp_config_connect:
* @a: a #GObject
* @b: another #GObject
* @property_name: the name of a property to connect or %NULL for all
*
* Connects the two object @a and @b in a way that property changes of
* one are propagated to the other. This is a two-way connection.
*
* If @property_name is %NULL the connection is setup for all
* properties. It is not required that @a and @b are of the same type.
* Only changes on properties that exist in both object classes and
* are of the same value_type are propagated.
**/
void
gimp_config_connect (GObject *a,
GObject *b,
const gchar *property_name)
{
gchar *signal_name;
g_return_if_fail (a != b);
g_return_if_fail (G_IS_OBJECT (a) && G_IS_OBJECT (b));
if (property_name)
signal_name = g_strconcat ("notify::", property_name, NULL);
else
signal_name = "notify";
g_signal_connect_object (a, signal_name,
G_CALLBACK (gimp_config_connect_notify),
b, 0);
g_signal_connect_object (b, signal_name,
G_CALLBACK (gimp_config_connect_notify),
a, 0);
if (property_name)
g_free (signal_name);
}
static void
gimp_config_connect_full_notify (GObject *src,
GParamSpec *param_spec,
GObject *dest)
{
if (param_spec->flags & G_PARAM_READABLE)
{
gchar *attach_key;
gchar *dest_prop_name;
GParamSpec *dest_spec = NULL;
attach_key = g_strdup_printf ("%p-%s", dest, param_spec->name);
dest_prop_name = g_object_get_data (src, attach_key);
g_free (attach_key);
if (dest_prop_name)
dest_spec = g_object_class_find_property (G_OBJECT_GET_CLASS (dest),
dest_prop_name);
if (dest_spec &&
(dest_spec->value_type == param_spec->value_type) &&
(dest_spec->flags & G_PARAM_WRITABLE) &&
(dest_spec->flags & G_PARAM_CONSTRUCT_ONLY) == 0)
{
GValue value = { 0, };
g_value_init (&value, param_spec->value_type);
g_object_get_property (src, param_spec->name, &value);
g_signal_handlers_block_by_func (dest,
gimp_config_connect_full_notify, src);
g_object_set_property (dest, dest_prop_name, &value);
g_signal_handlers_unblock_by_func (dest,
gimp_config_connect_full_notify, src);
g_value_unset (&value);
}
}
}
/**
* gimp_config_connect_full:
* @a: a #GObject
* @b: another #GObject
* @property_name_a: the name of a property of @a to connect
* @property_name_b: the name of a property of @b to connect
*
* Connects the two object @a and @b in a way that property changes of
* one are propagated to the other. This is a two-way connection.
*
* If @property_name is %NULL the connection is setup for all
* properties. It is not required that @a and @b are of the same type.
* Only changes on properties that exist in both object classes and
* are of the same value_type are propagated.
**/
void
gimp_config_connect_full (GObject *a,
GObject *b,
const gchar *property_name_a,
const gchar *property_name_b)
{
gchar *signal_name;
gchar *attach_key;
g_return_if_fail (a != b);
g_return_if_fail (G_IS_OBJECT (a) && G_IS_OBJECT (b));
g_return_if_fail (property_name_a != NULL);
g_return_if_fail (property_name_b != NULL);
signal_name = g_strconcat ("notify::", property_name_a, NULL);
attach_key = g_strdup_printf ("%p-%s", b, property_name_a);
g_signal_connect_object (a, signal_name,
G_CALLBACK (gimp_config_connect_full_notify),
b, 0);
g_object_set_data_full (a, attach_key, g_strdup (property_name_b),
(GDestroyNotify) g_free);
g_free (signal_name);
g_free (attach_key);
signal_name = g_strconcat ("notify::", property_name_b, NULL);
attach_key = g_strdup_printf ("%p-%s", a, property_name_b);
g_signal_connect_object (b, signal_name,
G_CALLBACK (gimp_config_connect_full_notify),
a, 0);
g_object_set_data_full (b, attach_key, g_strdup (property_name_a),
(GDestroyNotify) g_free);
g_free (signal_name);
g_free (attach_key);
}
/**
* gimp_config_disconnect:
* @a: a #GObject
* @b: another #GObject
*
* Removes a connection between @dest and @src that was previously set
* up using gimp_config_connect().
**/
void
gimp_config_disconnect (GObject *a,
GObject *b)
{
g_return_if_fail (G_IS_OBJECT (a) && G_IS_OBJECT (b));
g_signal_handlers_disconnect_by_func (b,
G_CALLBACK (gimp_config_connect_notify),
a);
g_signal_handlers_disconnect_by_func (a,
G_CALLBACK (gimp_config_connect_notify),
b);
}