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75e8e3877c
2001-03-05 Sven Neumann <sven@gimp.org> * app/Makefile.am * app/apptypes.h * app/gimpimage-undo.[ch] * app/gimpundo.[ch] * app/gimpundostack.[ch]: added new GimpUndo and GimpUndoStack objects which will be used for the upcoming new undo system. Actually my current plan for the undo system is to keep it pretty much as it is... * app/gimpimage.[ch]: added new GimpUndoStacks but temporarily kept old GSLists around, so I don't break everything now.
220 lines
5.6 KiB
C
220 lines
5.6 KiB
C
/* The GIMP -- an image manipulation program
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include "config.h"
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#include <gtk/gtk.h>
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#include "apptypes.h"
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#include "gimpimage.h"
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#include "gimprc.h"
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#include "gimpundo.h"
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#include "temp_buf.h"
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enum
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{
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PUSH,
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POP,
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LAST_SIGNAL
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};
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static void gimp_undo_class_init (GimpUndoClass *klass);
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static void gimp_undo_init (GimpUndo *undo);
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static void gimp_undo_destroy (GtkObject *object);
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static void gimp_undo_real_push (GimpUndo *undo,
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GimpImage *gimage);
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static void gimp_undo_real_pop (GimpUndo *undo,
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GimpImage *gimage);
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static TempBuf * gimp_undo_get_preview (GimpViewable *viewable,
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gint width,
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gint height);
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static guint undo_signals[LAST_SIGNAL] = { 0 };
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static GimpViewableClass *parent_class = NULL;
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GtkType
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gimp_undo_get_type (void)
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{
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static GtkType undo_type = 0;
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if (! undo_type)
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{
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static const GtkTypeInfo undo_info =
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{
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"GimpUndo",
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sizeof (GimpUndo),
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sizeof (GimpUndoClass),
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(GtkClassInitFunc) gimp_undo_class_init,
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(GtkObjectInitFunc) gimp_undo_init,
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/* reserved_1 */ NULL,
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/* reserved_2 */ NULL,
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(GtkClassInitFunc) NULL
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};
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undo_type = gtk_type_unique (GIMP_TYPE_VIEWABLE, &undo_info);
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}
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return undo_type;
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}
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static void
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gimp_undo_class_init (GimpUndoClass *klass)
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{
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GtkObjectClass *object_class;
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GimpViewableClass *viewable_class;
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object_class = (GtkObjectClass *) klass;
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viewable_class = (GimpViewableClass *) klass;
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parent_class = gtk_type_class (GIMP_TYPE_VIEWABLE);
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undo_signals[PUSH] =
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gtk_signal_new ("push",
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GTK_RUN_FIRST,
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object_class->type,
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GTK_SIGNAL_OFFSET (GimpUndoClass, push),
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gtk_marshal_NONE__POINTER,
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GTK_TYPE_NONE,
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1, GTK_TYPE_POINTER);
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undo_signals[POP] =
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gtk_signal_new ("pop",
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GTK_RUN_FIRST,
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object_class->type,
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GTK_SIGNAL_OFFSET (GimpUndoClass, pop),
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gtk_marshal_NONE__POINTER,
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GTK_TYPE_NONE,
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1, GTK_TYPE_POINTER);
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gtk_object_class_add_signals (object_class, undo_signals, LAST_SIGNAL);
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object_class->destroy = gimp_undo_destroy;
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viewable_class->get_preview = gimp_undo_get_preview;
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klass->push = gimp_undo_real_push;
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klass->pop = gimp_undo_real_pop;
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}
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static void
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gimp_undo_init (GimpUndo *undo)
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{
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undo->data = NULL;
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undo->size = 0;
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undo->dirties_image = FALSE;
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undo->pop_func = NULL;
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undo->free_func = NULL;
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undo->preview = NULL;
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}
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static void
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gimp_undo_destroy (GtkObject *object)
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{
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GimpUndo *undo;
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undo = GIMP_UNDO (object);
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if (undo->free_func)
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undo->free_func (undo);
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if (undo->preview)
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temp_buf_free (undo->preview);
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if (GTK_OBJECT_CLASS (parent_class)->destroy)
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GTK_OBJECT_CLASS (parent_class)->destroy (object);
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}
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GimpUndo *
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gimp_undo_new (const gchar *name,
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gpointer data,
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glong size,
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gboolean dirties_image,
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GimpUndoPopFunc pop_func,
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GimpUndoFreeFunc free_func)
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{
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GimpUndo *undo;
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undo = GIMP_UNDO (gtk_object_new (GIMP_TYPE_UNDO, NULL));
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gimp_object_set_name (GIMP_OBJECT (undo), name);
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undo->data = data;
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undo->size = sizeof (GimpUndo) + size;
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undo->pop_func = pop_func;
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undo->free_func = free_func;
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return undo;
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}
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void
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gimp_undo_push (GimpUndo *undo,
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GimpImage *gimage)
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{
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g_return_if_fail (undo != NULL);
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g_return_if_fail (GIMP_IS_UNDO (undo));
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g_return_if_fail (gimage != NULL);
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g_return_if_fail (GIMP_IS_IMAGE (gimage));
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gtk_signal_emit (GTK_OBJECT (undo), undo_signals[PUSH], gimage);
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}
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void
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gimp_undo_pop (GimpUndo *undo,
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GimpImage *gimage)
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{
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g_return_if_fail (undo != NULL);
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g_return_if_fail (GIMP_IS_UNDO (undo));
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g_return_if_fail (gimage != NULL);
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g_return_if_fail (GIMP_IS_IMAGE (gimage));
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gtk_signal_emit (GTK_OBJECT (undo), undo_signals[POP], gimage);
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}
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static void
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gimp_undo_real_push (GimpUndo *undo,
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GimpImage *gimage)
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{
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undo->preview = gimp_viewable_get_preview (GIMP_VIEWABLE (gimage),
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preview_size, preview_size);
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}
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static void
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gimp_undo_real_pop (GimpUndo *undo,
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GimpImage *gimage)
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{
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if (undo->pop_func)
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undo->pop_func (undo, gimage);
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}
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static TempBuf *
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gimp_undo_get_preview (GimpViewable *viewable,
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gint width,
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gint height)
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{
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return (GIMP_UNDO (viewable)->preview);
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}
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