267 lines
8.5 KiB
C
267 lines
8.5 KiB
C
/* 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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* pikacanvascanvasboundary.c
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* Copyright (C) 2019 Ell
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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 "core/pikaimage.h"
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#include "pikacanvas-style.h"
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#include "pikacanvascanvasboundary.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_IMAGE
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};
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typedef struct _PikaCanvasCanvasBoundaryPrivate PikaCanvasCanvasBoundaryPrivate;
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struct _PikaCanvasCanvasBoundaryPrivate
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{
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PikaImage *image;
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};
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#define GET_PRIVATE(canvas_boundary) \
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((PikaCanvasCanvasBoundaryPrivate *) pika_canvas_canvas_boundary_get_instance_private ((PikaCanvasCanvasBoundary *) (canvas_boundary)))
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/* local function prototypes */
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static void pika_canvas_canvas_boundary_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_canvas_boundary_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_canvas_boundary_finalize (GObject *object);
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static void pika_canvas_canvas_boundary_draw (PikaCanvasItem *item,
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cairo_t *cr);
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static cairo_region_t * pika_canvas_canvas_boundary_get_extents (PikaCanvasItem *item);
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static void pika_canvas_canvas_boundary_stroke (PikaCanvasItem *item,
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cairo_t *cr);
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G_DEFINE_TYPE_WITH_PRIVATE (PikaCanvasCanvasBoundary, pika_canvas_canvas_boundary,
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PIKA_TYPE_CANVAS_RECTANGLE)
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#define parent_class pika_canvas_canvas_boundary_parent_class
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static void
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pika_canvas_canvas_boundary_class_init (PikaCanvasCanvasBoundaryClass *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_canvas_boundary_set_property;
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object_class->get_property = pika_canvas_canvas_boundary_get_property;
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object_class->finalize = pika_canvas_canvas_boundary_finalize;
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item_class->draw = pika_canvas_canvas_boundary_draw;
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item_class->get_extents = pika_canvas_canvas_boundary_get_extents;
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item_class->stroke = pika_canvas_canvas_boundary_stroke;
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g_object_class_install_property (object_class, PROP_IMAGE,
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g_param_spec_object ("image", NULL, NULL,
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PIKA_TYPE_IMAGE,
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PIKA_PARAM_READWRITE));
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}
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static void
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pika_canvas_canvas_boundary_init (PikaCanvasCanvasBoundary *canvas_boundary)
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{
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}
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static void
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pika_canvas_canvas_boundary_finalize (GObject *object)
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{
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PikaCanvasCanvasBoundaryPrivate *private = GET_PRIVATE (object);
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g_clear_weak_pointer (&private->image);
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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static void
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pika_canvas_canvas_boundary_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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PikaCanvasCanvasBoundaryPrivate *private = GET_PRIVATE (object);
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switch (property_id)
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{
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case PROP_IMAGE:
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g_set_weak_pointer (&private->image, g_value_get_object (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_canvas_boundary_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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PikaCanvasCanvasBoundaryPrivate *private = GET_PRIVATE (object);
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switch (property_id)
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{
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case PROP_IMAGE:
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g_value_set_object (value, private->image);
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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_canvas_boundary_draw (PikaCanvasItem *item,
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cairo_t *cr)
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{
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PikaCanvasCanvasBoundaryPrivate *private = GET_PRIVATE (item);
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if (private->image)
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PIKA_CANVAS_ITEM_CLASS (parent_class)->draw (item, cr);
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}
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static cairo_region_t *
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pika_canvas_canvas_boundary_get_extents (PikaCanvasItem *item)
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{
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PikaCanvasCanvasBoundaryPrivate *private = GET_PRIVATE (item);
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if (private->image)
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return PIKA_CANVAS_ITEM_CLASS (parent_class)->get_extents (item);
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return NULL;
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}
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static void
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pika_canvas_canvas_boundary_stroke (PikaCanvasItem *item,
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cairo_t *cr)
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{
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PikaDisplayShell *shell = pika_canvas_item_get_shell (item);
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pika_canvas_set_canvas_style (pika_canvas_item_get_canvas (item), cr,
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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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PikaCanvasItem *
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pika_canvas_canvas_boundary_new (PikaDisplayShell *shell)
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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_CANVAS_BOUNDARY,
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"shell", shell,
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NULL);
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}
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void
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pika_canvas_canvas_boundary_set_image (PikaCanvasCanvasBoundary *boundary,
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PikaImage *image)
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{
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PikaCanvasCanvasBoundaryPrivate *private;
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g_return_if_fail (PIKA_IS_CANVAS_CANVAS_BOUNDARY (boundary));
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g_return_if_fail (image == NULL || PIKA_IS_IMAGE (image));
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private = GET_PRIVATE (boundary);
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if (image != private->image)
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{
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pika_canvas_item_begin_change (PIKA_CANVAS_ITEM (boundary));
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if (image)
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{
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g_object_set (boundary,
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"x", (gdouble) 0,
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"y", (gdouble) 0,
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"width", (gdouble) pika_image_get_width (image),
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"height", (gdouble) pika_image_get_height (image),
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NULL);
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}
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g_object_set (boundary,
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"image", image,
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NULL);
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pika_canvas_item_end_change (PIKA_CANVAS_ITEM (boundary));
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}
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else if (image && image == private->image)
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{
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gint lx, ly, lw, lh;
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gdouble x, y, w ,h;
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lx = 0;
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ly = 0;
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lw = pika_image_get_width (image);
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lh = pika_image_get_height (image);
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g_object_get (boundary,
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"x", &x,
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"y", &y,
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"width", &w,
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"height", &h,
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NULL);
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if (lx != (gint) x ||
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ly != (gint) y ||
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lw != (gint) w ||
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lh != (gint) h)
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{
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pika_canvas_item_begin_change (PIKA_CANVAS_ITEM (boundary));
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g_object_set (boundary,
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"x", (gdouble) lx,
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"y", (gdouble) ly,
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"width", (gdouble) lw,
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"height", (gdouble) lh,
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NULL);
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pika_canvas_item_end_change (PIKA_CANVAS_ITEM (boundary));
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}
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}
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}
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