152 lines
7.3 KiB
C
152 lines
7.3 KiB
C
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/* PIKA - Photo and Image Kooker Application
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* a rebranding of The GNU Image Manipulation Program (created with heckimp)
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* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
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*
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* Original copyright, applying to most contents (license remains unchanged):
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* pikacanvasitem.h
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* Copyright (C) 2010 Michael Natterer <mitch@gimp.org>
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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 3 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, see <https://www.gnu.org/licenses/>.
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*/
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#ifndef __PIKA_CANVAS_ITEM_H__
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#define __PIKA_CANVAS_ITEM_H__
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#include "core/pikaobject.h"
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#define PIKA_TYPE_CANVAS_ITEM (pika_canvas_item_get_type ())
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#define PIKA_CANVAS_ITEM(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), PIKA_TYPE_CANVAS_ITEM, PikaCanvasItem))
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#define PIKA_CANVAS_ITEM_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), PIKA_TYPE_CANVAS_ITEM, PikaCanvasItemClass))
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#define PIKA_IS_CANVAS_ITEM(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), PIKA_TYPE_CANVAS_ITEM))
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#define PIKA_IS_CANVAS_ITEM_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), PIKA_TYPE_CANVAS_ITEM))
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#define PIKA_CANVAS_ITEM_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), PIKA_TYPE_CANVAS_ITEM, PikaCanvasItemClass))
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typedef struct _PikaCanvasItemPrivate PikaCanvasItemPrivate;
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typedef struct _PikaCanvasItemClass PikaCanvasItemClass;
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struct _PikaCanvasItem
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{
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PikaObject parent_instance;
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PikaCanvasItemPrivate *private;
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};
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struct _PikaCanvasItemClass
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{
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PikaObjectClass parent_class;
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/* signals */
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void (* update) (PikaCanvasItem *item,
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cairo_region_t *region);
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/* virtual functions */
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void (* draw) (PikaCanvasItem *item,
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cairo_t *cr);
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cairo_region_t * (* get_extents) (PikaCanvasItem *item);
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void (* stroke) (PikaCanvasItem *item,
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cairo_t *cr);
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void (* fill) (PikaCanvasItem *item,
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cairo_t *cr);
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gboolean (* hit) (PikaCanvasItem *item,
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gdouble x,
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gdouble y);
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};
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GType pika_canvas_item_get_type (void) G_GNUC_CONST;
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PikaDisplayShell * pika_canvas_item_get_shell (PikaCanvasItem *item);
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PikaImage * pika_canvas_item_get_image (PikaCanvasItem *item);
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GtkWidget * pika_canvas_item_get_canvas (PikaCanvasItem *item);
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void pika_canvas_item_draw (PikaCanvasItem *item,
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cairo_t *cr);
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cairo_region_t * pika_canvas_item_get_extents (PikaCanvasItem *item);
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gboolean pika_canvas_item_hit (PikaCanvasItem *item,
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gdouble x,
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gdouble y);
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void pika_canvas_item_set_visible (PikaCanvasItem *item,
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gboolean visible);
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gboolean pika_canvas_item_get_visible (PikaCanvasItem *item);
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void pika_canvas_item_set_line_cap (PikaCanvasItem *item,
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cairo_line_cap_t line_cap);
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void pika_canvas_item_set_highlight (PikaCanvasItem *item,
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gboolean highlight);
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gboolean pika_canvas_item_get_highlight (PikaCanvasItem *item);
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void pika_canvas_item_begin_change (PikaCanvasItem *item);
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void pika_canvas_item_end_change (PikaCanvasItem *item);
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void pika_canvas_item_suspend_stroking (PikaCanvasItem *item);
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void pika_canvas_item_resume_stroking (PikaCanvasItem *item);
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void pika_canvas_item_suspend_filling (PikaCanvasItem *item);
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void pika_canvas_item_resume_filling (PikaCanvasItem *item);
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void pika_canvas_item_transform (PikaCanvasItem *item,
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cairo_t *cr);
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void pika_canvas_item_transform_xy (PikaCanvasItem *item,
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gdouble x,
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gdouble y,
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gint *tx,
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gint *ty);
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void pika_canvas_item_transform_xy_f (PikaCanvasItem *item,
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gdouble x,
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gdouble y,
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gdouble *tx,
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gdouble *ty);
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gdouble pika_canvas_item_transform_distance
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(PikaCanvasItem *item,
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gdouble x1,
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gdouble y1,
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gdouble x2,
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gdouble y2);
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gdouble pika_canvas_item_transform_distance_square
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(PikaCanvasItem *item,
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gdouble x1,
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gdouble y1,
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gdouble x2,
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gdouble y2);
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void pika_canvas_item_untransform_viewport
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(PikaCanvasItem *item,
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gint *x,
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gint *y,
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gint *w,
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gint *h);
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/* protected */
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void _pika_canvas_item_update (PikaCanvasItem *item,
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cairo_region_t *region);
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gboolean _pika_canvas_item_needs_update (PikaCanvasItem *item);
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void _pika_canvas_item_stroke (PikaCanvasItem *item,
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cairo_t *cr);
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void _pika_canvas_item_fill (PikaCanvasItem *item,
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cairo_t *cr);
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#endif /* __PIKA_CANVAS_ITEM_H__ */
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