365 lines
12 KiB
C
365 lines
12 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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* pikacanvasrectangle.c
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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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#include "config.h"
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#include <gegl.h>
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#include <gtk/gtk.h>
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#include "libpikabase/pikabase.h"
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#include "libpikamath/pikamath.h"
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#include "display-types.h"
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#include "pikacanvasrectangle.h"
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#include "pikadisplayshell.h"
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enum
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{
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PROP_0,
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PROP_X,
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PROP_Y,
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PROP_WIDTH,
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PROP_HEIGHT,
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PROP_FILLED
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};
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typedef struct _PikaCanvasRectanglePrivate PikaCanvasRectanglePrivate;
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struct _PikaCanvasRectanglePrivate
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{
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gdouble x;
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gdouble y;
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gdouble width;
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gdouble height;
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gboolean filled;
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};
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#define GET_PRIVATE(rectangle) \
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((PikaCanvasRectanglePrivate *) pika_canvas_rectangle_get_instance_private ((PikaCanvasRectangle *) (rectangle)))
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/* local function prototypes */
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static void pika_canvas_rectangle_set_property (GObject *object,
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guint property_id,
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const GValue *value,
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GParamSpec *pspec);
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static void pika_canvas_rectangle_get_property (GObject *object,
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guint property_id,
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GValue *value,
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GParamSpec *pspec);
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static void pika_canvas_rectangle_draw (PikaCanvasItem *item,
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cairo_t *cr);
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static cairo_region_t * pika_canvas_rectangle_get_extents (PikaCanvasItem *item);
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G_DEFINE_TYPE_WITH_PRIVATE (PikaCanvasRectangle, pika_canvas_rectangle,
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PIKA_TYPE_CANVAS_ITEM)
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#define parent_class pika_canvas_rectangle_parent_class
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static void
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pika_canvas_rectangle_class_init (PikaCanvasRectangleClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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PikaCanvasItemClass *item_class = PIKA_CANVAS_ITEM_CLASS (klass);
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object_class->set_property = pika_canvas_rectangle_set_property;
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object_class->get_property = pika_canvas_rectangle_get_property;
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item_class->draw = pika_canvas_rectangle_draw;
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item_class->get_extents = pika_canvas_rectangle_get_extents;
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g_object_class_install_property (object_class, PROP_X,
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g_param_spec_double ("x", NULL, NULL,
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-PIKA_MAX_IMAGE_SIZE,
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PIKA_MAX_IMAGE_SIZE, 0,
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PIKA_PARAM_READWRITE));
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g_object_class_install_property (object_class, PROP_Y,
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g_param_spec_double ("y", NULL, NULL,
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-PIKA_MAX_IMAGE_SIZE,
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PIKA_MAX_IMAGE_SIZE, 0,
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PIKA_PARAM_READWRITE));
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g_object_class_install_property (object_class, PROP_WIDTH,
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g_param_spec_double ("width", NULL, NULL,
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-PIKA_MAX_IMAGE_SIZE,
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PIKA_MAX_IMAGE_SIZE, 0,
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PIKA_PARAM_READWRITE));
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g_object_class_install_property (object_class, PROP_HEIGHT,
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g_param_spec_double ("height", NULL, NULL,
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-PIKA_MAX_IMAGE_SIZE,
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PIKA_MAX_IMAGE_SIZE, 0,
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PIKA_PARAM_READWRITE));
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g_object_class_install_property (object_class, PROP_FILLED,
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g_param_spec_boolean ("filled", NULL, NULL,
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FALSE,
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PIKA_PARAM_READWRITE));
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}
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static void
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pika_canvas_rectangle_init (PikaCanvasRectangle *rectangle)
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{
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}
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static void
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pika_canvas_rectangle_set_property (GObject *object,
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guint property_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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PikaCanvasRectanglePrivate *private = GET_PRIVATE (object);
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switch (property_id)
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{
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case PROP_X:
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private->x = g_value_get_double (value);
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break;
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case PROP_Y:
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private->y = g_value_get_double (value);
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break;
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case PROP_WIDTH:
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private->width = g_value_get_double (value);
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break;
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case PROP_HEIGHT:
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private->height = g_value_get_double (value);
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break;
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case PROP_FILLED:
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private->filled = g_value_get_boolean (value);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
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break;
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}
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}
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static void
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pika_canvas_rectangle_get_property (GObject *object,
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guint property_id,
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GValue *value,
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GParamSpec *pspec)
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{
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PikaCanvasRectanglePrivate *private = GET_PRIVATE (object);
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switch (property_id)
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{
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case PROP_X:
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g_value_set_double (value, private->x);
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break;
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case PROP_Y:
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g_value_set_double (value, private->y);
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break;
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case PROP_WIDTH:
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g_value_set_double (value, private->width);
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break;
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case PROP_HEIGHT:
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g_value_set_double (value, private->height);
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break;
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case PROP_FILLED:
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g_value_set_boolean (value, private->filled);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
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break;
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}
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}
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static void
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pika_canvas_rectangle_transform (PikaCanvasItem *item,
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gdouble *x,
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gdouble *y,
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gdouble *w,
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gdouble *h)
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{
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PikaCanvasRectanglePrivate *private = GET_PRIVATE (item);
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gdouble x1, y1;
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gdouble x2, y2;
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pika_canvas_item_transform_xy_f (item,
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MIN (private->x,
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private->x + private->width),
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MIN (private->y,
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private->y + private->height),
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&x1, &y1);
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pika_canvas_item_transform_xy_f (item,
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MAX (private->x,
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private->x + private->width),
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MAX (private->y,
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private->y + private->height),
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&x2, &y2);
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x1 = floor (x1);
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y1 = floor (y1);
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x2 = ceil (x2);
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y2 = ceil (y2);
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if (private->filled)
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{
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*x = x1;
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*y = y1;
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*w = x2 - x1;
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*h = y2 - y1;
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}
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else
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{
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*x = x1 + 0.5;
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*y = y1 + 0.5;
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*w = x2 - 0.5 - *x;
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*h = y2 - 0.5 - *y;
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*w = MAX (0.0, *w);
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*h = MAX (0.0, *h);
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}
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}
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static void
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pika_canvas_rectangle_draw (PikaCanvasItem *item,
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cairo_t *cr)
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{
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PikaCanvasRectanglePrivate *private = GET_PRIVATE (item);
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gdouble x, y;
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gdouble w, h;
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pika_canvas_rectangle_transform (item, &x, &y, &w, &h);
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cairo_rectangle (cr, x, y, w, h);
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if (private->filled)
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_pika_canvas_item_fill (item, cr);
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else
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_pika_canvas_item_stroke (item, cr);
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}
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static cairo_region_t *
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pika_canvas_rectangle_get_extents (PikaCanvasItem *item)
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{
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PikaCanvasRectanglePrivate *private = GET_PRIVATE (item);
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cairo_rectangle_int_t rectangle;
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gdouble x, y;
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gdouble w, h;
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pika_canvas_rectangle_transform (item, &x, &y, &w, &h);
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if (private->filled)
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{
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rectangle.x = floor (x - 1.0);
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rectangle.y = floor (y - 1.0);
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rectangle.width = ceil (w + 2.0);
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rectangle.height = ceil (h + 2.0);
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return cairo_region_create_rectangle (&rectangle);
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}
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else if (w > 64 && h > 64)
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{
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cairo_region_t *region;
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/* left */
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rectangle.x = floor (x - 1.5);
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rectangle.y = floor (y - 1.5);
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rectangle.width = 3.0;
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rectangle.height = ceil (h + 3.0);
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region = cairo_region_create_rectangle (&rectangle);
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/* right */
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rectangle.x = floor (x + w - 1.5);
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cairo_region_union_rectangle (region, &rectangle);
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/* top */
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rectangle.x = floor (x - 1.5);
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rectangle.y = floor (y - 1.5);
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rectangle.width = ceil (w + 3.0);
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rectangle.height = 3.0;
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cairo_region_union_rectangle (region, &rectangle);
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/* bottom */
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rectangle.y = floor (y + h - 1.5);
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cairo_region_union_rectangle (region, &rectangle);
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return region;
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}
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else
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{
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rectangle.x = floor (x - 1.5);
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rectangle.y = floor (y - 1.5);
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rectangle.width = ceil (w + 3.0);
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rectangle.height = ceil (h + 3.0);
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return cairo_region_create_rectangle (&rectangle);
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}
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}
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PikaCanvasItem *
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pika_canvas_rectangle_new (PikaDisplayShell *shell,
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gdouble x,
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gdouble y,
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gdouble width,
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gdouble height,
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gboolean filled)
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{
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g_return_val_if_fail (PIKA_IS_DISPLAY_SHELL (shell), NULL);
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return g_object_new (PIKA_TYPE_CANVAS_RECTANGLE,
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"shell", shell,
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"x", x,
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"y", y,
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"width", width,
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"height", height,
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"filled", filled,
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NULL);
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}
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void
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pika_canvas_rectangle_set (PikaCanvasItem *rectangle,
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gdouble x,
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gdouble y,
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gdouble width,
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gdouble height)
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{
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g_return_if_fail (PIKA_IS_CANVAS_RECTANGLE (rectangle));
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pika_canvas_item_begin_change (rectangle);
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g_object_set (rectangle,
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"x", x,
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"y", y,
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"width", width,
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"height", height,
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NULL);
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pika_canvas_item_end_change (rectangle);
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}
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