300 lines
9.4 KiB
C
300 lines
9.4 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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* pikacanvasguide.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 "pikacanvas-style.h"
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#include "pikacanvasguide.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_ORIENTATION,
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PROP_POSITION,
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PROP_STYLE
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};
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typedef struct _PikaCanvasGuidePrivate PikaCanvasGuidePrivate;
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struct _PikaCanvasGuidePrivate
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{
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PikaOrientationType orientation;
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gint position;
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PikaGuideStyle style;
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};
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#define GET_PRIVATE(guide) \
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((PikaCanvasGuidePrivate *) pika_canvas_guide_get_instance_private ((PikaCanvasGuide *) (guide)))
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/* local function prototypes */
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static void pika_canvas_guide_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_guide_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_guide_draw (PikaCanvasItem *item,
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cairo_t *cr);
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static cairo_region_t * pika_canvas_guide_get_extents (PikaCanvasItem *item);
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static void pika_canvas_guide_stroke (PikaCanvasItem *item,
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cairo_t *cr);
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G_DEFINE_TYPE_WITH_PRIVATE (PikaCanvasGuide, pika_canvas_guide,
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PIKA_TYPE_CANVAS_ITEM)
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#define parent_class pika_canvas_guide_parent_class
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static void
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pika_canvas_guide_class_init (PikaCanvasGuideClass *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_guide_set_property;
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object_class->get_property = pika_canvas_guide_get_property;
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item_class->draw = pika_canvas_guide_draw;
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item_class->get_extents = pika_canvas_guide_get_extents;
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item_class->stroke = pika_canvas_guide_stroke;
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g_object_class_install_property (object_class, PROP_ORIENTATION,
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g_param_spec_enum ("orientation", NULL, NULL,
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PIKA_TYPE_ORIENTATION_TYPE,
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PIKA_ORIENTATION_HORIZONTAL,
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PIKA_PARAM_READWRITE));
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g_object_class_install_property (object_class, PROP_POSITION,
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g_param_spec_int ("position", 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_STYLE,
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g_param_spec_enum ("style", NULL, NULL,
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PIKA_TYPE_GUIDE_STYLE,
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PIKA_GUIDE_STYLE_NONE,
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PIKA_PARAM_READWRITE));
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}
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static void
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pika_canvas_guide_init (PikaCanvasGuide *guide)
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{
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}
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static void
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pika_canvas_guide_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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PikaCanvasGuidePrivate *private = GET_PRIVATE (object);
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switch (property_id)
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{
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case PROP_ORIENTATION:
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private->orientation = g_value_get_enum (value);
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break;
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case PROP_POSITION:
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private->position = g_value_get_int (value);
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break;
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case PROP_STYLE:
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private->style = g_value_get_enum (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_guide_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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PikaCanvasGuidePrivate *private = GET_PRIVATE (object);
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switch (property_id)
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{
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case PROP_ORIENTATION:
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g_value_set_enum (value, private->orientation);
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break;
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case PROP_POSITION:
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g_value_set_int (value, private->position);
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break;
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case PROP_STYLE:
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g_value_set_enum (value, private->style);
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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_guide_transform (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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{
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PikaCanvasGuidePrivate *private = GET_PRIVATE (item);
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GtkWidget *canvas = pika_canvas_item_get_canvas (item);
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GtkAllocation allocation;
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gint max_outside;
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gint x, y;
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gtk_widget_get_allocation (canvas, &allocation);
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max_outside = allocation.width + allocation.height;
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*x1 = -max_outside;
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*y1 = -max_outside;
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*x2 = allocation.width + max_outside;
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*y2 = allocation.height + max_outside;
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switch (private->orientation)
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{
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case PIKA_ORIENTATION_HORIZONTAL:
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pika_canvas_item_transform_xy (item, 0, private->position, &x, &y);
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*y1 = *y2 = y + 0.5;
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break;
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case PIKA_ORIENTATION_VERTICAL:
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pika_canvas_item_transform_xy (item, private->position, 0, &x, &y);
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*x1 = *x2 = x + 0.5;
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break;
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case PIKA_ORIENTATION_UNKNOWN:
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return;
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}
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}
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static void
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pika_canvas_guide_draw (PikaCanvasItem *item,
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cairo_t *cr)
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{
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gdouble x1, y1;
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gdouble x2, y2;
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pika_canvas_guide_transform (item, &x1, &y1, &x2, &y2);
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cairo_move_to (cr, x1, y1);
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cairo_line_to (cr, x2, y2);
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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_guide_get_extents (PikaCanvasItem *item)
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{
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cairo_rectangle_int_t rectangle;
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gdouble x1, y1;
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gdouble x2, y2;
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pika_canvas_guide_transform (item, &x1, &y1, &x2, &y2);
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rectangle.x = MIN (x1, x2) - 1.5;
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rectangle.y = MIN (y1, y2) - 1.5;
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rectangle.width = ABS (x2 - x1) + 3.0;
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rectangle.height = ABS (y2 - y1) + 3.0;
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return cairo_region_create_rectangle (&rectangle);
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}
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static void
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pika_canvas_guide_stroke (PikaCanvasItem *item,
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cairo_t *cr)
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{
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PikaCanvasGuidePrivate *private = GET_PRIVATE (item);
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if (private->style != PIKA_GUIDE_STYLE_NONE)
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{
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PikaDisplayShell *shell = pika_canvas_item_get_shell (item);
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pika_canvas_set_guide_style (pika_canvas_item_get_canvas (item), cr,
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private->style,
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pika_canvas_item_get_highlight (item),
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shell->offset_x, shell->offset_y);
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cairo_stroke (cr);
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}
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else
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{
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PIKA_CANVAS_ITEM_CLASS (parent_class)->stroke (item, cr);
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}
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}
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PikaCanvasItem *
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pika_canvas_guide_new (PikaDisplayShell *shell,
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PikaOrientationType orientation,
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gint position,
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PikaGuideStyle style)
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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_GUIDE,
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"shell", shell,
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"orientation", orientation,
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"position", position,
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"style", style,
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NULL);
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}
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void
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pika_canvas_guide_set (PikaCanvasItem *guide,
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PikaOrientationType orientation,
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gint position)
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{
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g_return_if_fail (PIKA_IS_CANVAS_GUIDE (guide));
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pika_canvas_item_begin_change (guide);
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g_object_set (guide,
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"orientation", orientation,
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"position", position,
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NULL);
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pika_canvas_item_end_change (guide);
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}
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