PIKApp/app/display/pikacanvasitem.h

152 lines
7.3 KiB
C
Raw Normal View History

2023-09-26 00:35:21 +02:00
/* PIKA - Photo and Image Kooker Application
* a rebranding of The GNU Image Manipulation Program (created with heckimp)
* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
*
* Original copyright, applying to most contents (license remains unchanged):
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* pikacanvasitem.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 <https://www.gnu.org/licenses/>.
*/
#ifndef __PIKA_CANVAS_ITEM_H__
#define __PIKA_CANVAS_ITEM_H__
#include "core/pikaobject.h"
#define PIKA_TYPE_CANVAS_ITEM (pika_canvas_item_get_type ())
#define PIKA_CANVAS_ITEM(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), PIKA_TYPE_CANVAS_ITEM, PikaCanvasItem))
#define PIKA_CANVAS_ITEM_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), PIKA_TYPE_CANVAS_ITEM, PikaCanvasItemClass))
#define PIKA_IS_CANVAS_ITEM(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), PIKA_TYPE_CANVAS_ITEM))
#define PIKA_IS_CANVAS_ITEM_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), PIKA_TYPE_CANVAS_ITEM))
#define PIKA_CANVAS_ITEM_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), PIKA_TYPE_CANVAS_ITEM, PikaCanvasItemClass))
typedef struct _PikaCanvasItemPrivate PikaCanvasItemPrivate;
typedef struct _PikaCanvasItemClass PikaCanvasItemClass;
struct _PikaCanvasItem
{
PikaObject parent_instance;
PikaCanvasItemPrivate *private;
};
struct _PikaCanvasItemClass
{
PikaObjectClass parent_class;
/* signals */
void (* update) (PikaCanvasItem *item,
cairo_region_t *region);
/* virtual functions */
void (* draw) (PikaCanvasItem *item,
cairo_t *cr);
cairo_region_t * (* get_extents) (PikaCanvasItem *item);
void (* stroke) (PikaCanvasItem *item,
cairo_t *cr);
void (* fill) (PikaCanvasItem *item,
cairo_t *cr);
gboolean (* hit) (PikaCanvasItem *item,
gdouble x,
gdouble y);
};
GType pika_canvas_item_get_type (void) G_GNUC_CONST;
PikaDisplayShell * pika_canvas_item_get_shell (PikaCanvasItem *item);
PikaImage * pika_canvas_item_get_image (PikaCanvasItem *item);
GtkWidget * pika_canvas_item_get_canvas (PikaCanvasItem *item);
void pika_canvas_item_draw (PikaCanvasItem *item,
cairo_t *cr);
cairo_region_t * pika_canvas_item_get_extents (PikaCanvasItem *item);
gboolean pika_canvas_item_hit (PikaCanvasItem *item,
gdouble x,
gdouble y);
void pika_canvas_item_set_visible (PikaCanvasItem *item,
gboolean visible);
gboolean pika_canvas_item_get_visible (PikaCanvasItem *item);
void pika_canvas_item_set_line_cap (PikaCanvasItem *item,
cairo_line_cap_t line_cap);
void pika_canvas_item_set_highlight (PikaCanvasItem *item,
gboolean highlight);
gboolean pika_canvas_item_get_highlight (PikaCanvasItem *item);
void pika_canvas_item_begin_change (PikaCanvasItem *item);
void pika_canvas_item_end_change (PikaCanvasItem *item);
void pika_canvas_item_suspend_stroking (PikaCanvasItem *item);
void pika_canvas_item_resume_stroking (PikaCanvasItem *item);
void pika_canvas_item_suspend_filling (PikaCanvasItem *item);
void pika_canvas_item_resume_filling (PikaCanvasItem *item);
void pika_canvas_item_transform (PikaCanvasItem *item,
cairo_t *cr);
void pika_canvas_item_transform_xy (PikaCanvasItem *item,
gdouble x,
gdouble y,
gint *tx,
gint *ty);
void pika_canvas_item_transform_xy_f (PikaCanvasItem *item,
gdouble x,
gdouble y,
gdouble *tx,
gdouble *ty);
gdouble pika_canvas_item_transform_distance
(PikaCanvasItem *item,
gdouble x1,
gdouble y1,
gdouble x2,
gdouble y2);
gdouble pika_canvas_item_transform_distance_square
(PikaCanvasItem *item,
gdouble x1,
gdouble y1,
gdouble x2,
gdouble y2);
void pika_canvas_item_untransform_viewport
(PikaCanvasItem *item,
gint *x,
gint *y,
gint *w,
gint *h);
/* protected */
void _pika_canvas_item_update (PikaCanvasItem *item,
cairo_region_t *region);
gboolean _pika_canvas_item_needs_update (PikaCanvasItem *item);
void _pika_canvas_item_stroke (PikaCanvasItem *item,
cairo_t *cr);
void _pika_canvas_item_fill (PikaCanvasItem *item,
cairo_t *cr);
#endif /* __PIKA_CANVAS_ITEM_H__ */