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PIKApp/app/display/pikacanvasrectangle.c

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