gimp/app/core/gimpguideundo.c

206 lines
6.7 KiB
C

/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* 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 "core-types.h"
#include "gimpimage.h"
#include "gimpimage-guides.h"
#include "gimpguide.h"
#include "gimpguideundo.h"
enum
{
PROP_0,
PROP_GUIDE
};
static GObject * gimp_guide_undo_constructor (GType type,
guint n_params,
GObjectConstructParam *params);
static void gimp_guide_undo_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void gimp_guide_undo_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec);
static void gimp_guide_undo_pop (GimpUndo *undo,
GimpUndoMode undo_mode,
GimpUndoAccumulator *accum);
static void gimp_guide_undo_free (GimpUndo *undo,
GimpUndoMode undo_mode);
G_DEFINE_TYPE (GimpGuideUndo, gimp_guide_undo, GIMP_TYPE_UNDO)
#define parent_class gimp_guide_undo_parent_class
static void
gimp_guide_undo_class_init (GimpGuideUndoClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GimpUndoClass *undo_class = GIMP_UNDO_CLASS (klass);
object_class->constructor = gimp_guide_undo_constructor;
object_class->set_property = gimp_guide_undo_set_property;
object_class->get_property = gimp_guide_undo_get_property;
undo_class->pop = gimp_guide_undo_pop;
undo_class->free = gimp_guide_undo_free;
g_object_class_install_property (object_class, PROP_GUIDE,
g_param_spec_object ("guide", NULL, NULL,
GIMP_TYPE_GUIDE,
GIMP_PARAM_READWRITE |
G_PARAM_CONSTRUCT_ONLY));
}
static void
gimp_guide_undo_init (GimpGuideUndo *undo)
{
}
static GObject *
gimp_guide_undo_constructor (GType type,
guint n_params,
GObjectConstructParam *params)
{
GObject *object;
GimpGuideUndo *guide_undo;
object = G_OBJECT_CLASS (parent_class)->constructor (type, n_params, params);
guide_undo = GIMP_GUIDE_UNDO (object);
g_assert (GIMP_IS_GUIDE (guide_undo->guide));
guide_undo->orientation = gimp_guide_get_orientation (guide_undo->guide);
guide_undo->position = gimp_guide_get_position (guide_undo->guide);
return object;
}
static void
gimp_guide_undo_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
GimpGuideUndo *guide_undo = GIMP_GUIDE_UNDO (object);
switch (property_id)
{
case PROP_GUIDE:
guide_undo->guide = (GimpGuide *) g_value_dup_object (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_guide_undo_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
GimpGuideUndo *guide_undo = GIMP_GUIDE_UNDO (object);
switch (property_id)
{
case PROP_GUIDE:
g_value_set_object (value, guide_undo->guide);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_guide_undo_pop (GimpUndo *undo,
GimpUndoMode undo_mode,
GimpUndoAccumulator *accum)
{
GimpGuideUndo *guide_undo = GIMP_GUIDE_UNDO (undo);
GimpOrientationType orientation;
gint position;
GIMP_UNDO_CLASS (parent_class)->pop (undo, undo_mode, accum);
orientation = gimp_guide_get_orientation (guide_undo->guide);
position = gimp_guide_get_position (guide_undo->guide);
/* add and move guides manually (nor using the gimp_image_guide
* API), because we might be in the middle of an image resizing
* undo group and the guide's position might be temporarily out of
* image.
*/
if (position == -1)
{
undo->image->guides = g_list_prepend (undo->image->guides,
guide_undo->guide);
gimp_guide_set_position (guide_undo->guide, guide_undo->position);
g_object_ref (guide_undo->guide);
gimp_image_update_guide (undo->image, guide_undo->guide);
}
else if (guide_undo->position == -1)
{
gimp_image_remove_guide (undo->image, guide_undo->guide, FALSE);
}
else
{
gimp_image_update_guide (undo->image, guide_undo->guide);
gimp_guide_set_position (guide_undo->guide, guide_undo->position);
gimp_image_update_guide (undo->image, guide_undo->guide);
}
gimp_guide_set_orientation (guide_undo->guide, guide_undo->orientation);
guide_undo->position = position;
guide_undo->orientation = orientation;
}
static void
gimp_guide_undo_free (GimpUndo *undo,
GimpUndoMode undo_mode)
{
GimpGuideUndo *guide_undo = GIMP_GUIDE_UNDO (undo);
GIMP_UNDO_CLASS (parent_class)->free (undo, undo_mode);
if (guide_undo->guide)
{
g_object_unref (guide_undo->guide);
guide_undo->guide = NULL;
}
}