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app: add a canvas group item which keeps around sub-items

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It can draw them all with one call to draw() and returns a union of
their extents via get_extents().
This commit is contained in:
Michael Natterer
2010-09-25 17:14:57 +02:00
parent 6b30250353
commit 349c1500c9
3 changed files with 269 additions and 0 deletions
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58
app/display/gimpcanvasgroup.h Normal file
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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimpcanvasgroup.h
* Copyright (C) 2010 Michael Natterer <mitch@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 3 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, see <http://www.gnu.org/licenses/>.
*/
#ifndef __GIMP_CANVAS_GROUP_H__
#define __GIMP_CANVAS_GROUP_H__
#include "gimpcanvasitem.h"
#define GIMP_TYPE_CANVAS_GROUP (gimp_canvas_group_get_type ())
#define GIMP_CANVAS_GROUP(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_CANVAS_GROUP, GimpCanvasGroup))
#define GIMP_CANVAS_GROUP_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GIMP_TYPE_CANVAS_GROUP, GimpCanvasGroupClass))
#define GIMP_IS_CANVAS_GROUP(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_CANVAS_GROUP))
#define GIMP_IS_CANVAS_GROUP_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GIMP_TYPE_CANVAS_GROUP))
#define GIMP_CANVAS_GROUP_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GIMP_TYPE_CANVAS_GROUP, GimpCanvasGroupClass))
typedef struct _GimpCanvasGroup GimpCanvasGroup;
typedef struct _GimpCanvasGroupClass GimpCanvasGroupClass;
struct _GimpCanvasGroup
{
GimpCanvasItem parent_instance;
};
struct _GimpCanvasGroupClass
{
GimpCanvasItemClass parent_class;
};
GType gimp_canvas_group_get_type (void) G_GNUC_CONST;
GimpCanvasItem * gimp_canvas_group_new (void);
void gimp_canvas_group_add_item (GimpCanvasGroup *group,
GimpCanvasItem *item);
#endif /* __GIMP_CANVAS_GROUP_H__ */