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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimpcanvascanvasboundary.c
* Copyright (C) 2019 Ell
*
* 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 "libgimpbase/gimpbase.h"
#include "libgimpmath/gimpmath.h"
#include "display-types.h"
#include "core/gimpimage.h"
#include "gimpcanvas-style.h"
#include "gimpcanvascanvasboundary.h"
#include "gimpdisplayshell.h"
enum
{
PROP_0,
PROP_IMAGE
};
typedef struct _GimpCanvasCanvasBoundaryPrivate GimpCanvasCanvasBoundaryPrivate;
struct _GimpCanvasCanvasBoundaryPrivate
{
GimpImage *image;
};
#define GET_PRIVATE(canvas_boundary) \
((GimpCanvasCanvasBoundaryPrivate *) gimp_canvas_canvas_boundary_get_instance_private ((GimpCanvasCanvasBoundary *) (canvas_boundary)))
/* local function prototypes */
static void gimp_canvas_canvas_boundary_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void gimp_canvas_canvas_boundary_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec);
static void gimp_canvas_canvas_boundary_finalize (GObject *object);
static void gimp_canvas_canvas_boundary_draw (GimpCanvasItem *item,
cairo_t *cr);
static cairo_region_t * gimp_canvas_canvas_boundary_get_extents (GimpCanvasItem *item);
static void gimp_canvas_canvas_boundary_stroke (GimpCanvasItem *item,
cairo_t *cr);
G_DEFINE_TYPE_WITH_PRIVATE (GimpCanvasCanvasBoundary, gimp_canvas_canvas_boundary,
GIMP_TYPE_CANVAS_RECTANGLE)
#define parent_class gimp_canvas_canvas_boundary_parent_class
static void
gimp_canvas_canvas_boundary_class_init (GimpCanvasCanvasBoundaryClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GimpCanvasItemClass *item_class = GIMP_CANVAS_ITEM_CLASS (klass);
object_class->set_property = gimp_canvas_canvas_boundary_set_property;
object_class->get_property = gimp_canvas_canvas_boundary_get_property;
object_class->finalize = gimp_canvas_canvas_boundary_finalize;
item_class->draw = gimp_canvas_canvas_boundary_draw;
item_class->get_extents = gimp_canvas_canvas_boundary_get_extents;
item_class->stroke = gimp_canvas_canvas_boundary_stroke;
g_object_class_install_property (object_class, PROP_IMAGE,
g_param_spec_object ("image", NULL, NULL,
GIMP_TYPE_IMAGE,
GIMP_PARAM_READWRITE));
}
static void
gimp_canvas_canvas_boundary_init (GimpCanvasCanvasBoundary *canvas_boundary)
{
}
static void
gimp_canvas_canvas_boundary_finalize (GObject *object)
{
GimpCanvasCanvasBoundaryPrivate *private = GET_PRIVATE (object);
if (private->image)
g_object_remove_weak_pointer (G_OBJECT (private->image),
(gpointer) &private->image);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gimp_canvas_canvas_boundary_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
GimpCanvasCanvasBoundaryPrivate *private = GET_PRIVATE (object);
switch (property_id)
{
case PROP_IMAGE:
if (private->image)
g_object_remove_weak_pointer (G_OBJECT (private->image),
(gpointer) &private->image);
private->image = g_value_get_object (value); /* don't ref */
if (private->image)
g_object_add_weak_pointer (G_OBJECT (private->image),
(gpointer) &private->image);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_canvas_canvas_boundary_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
GimpCanvasCanvasBoundaryPrivate *private = GET_PRIVATE (object);
switch (property_id)
{
case PROP_IMAGE:
g_value_set_object (value, private->image);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_canvas_canvas_boundary_draw (GimpCanvasItem *item,
cairo_t *cr)
{
GimpCanvasCanvasBoundaryPrivate *private = GET_PRIVATE (item);
if (private->image)
GIMP_CANVAS_ITEM_CLASS (parent_class)->draw (item, cr);
}
static cairo_region_t *
gimp_canvas_canvas_boundary_get_extents (GimpCanvasItem *item)
{
GimpCanvasCanvasBoundaryPrivate *private = GET_PRIVATE (item);
if (private->image)
return GIMP_CANVAS_ITEM_CLASS (parent_class)->get_extents (item);
return NULL;
}
static void
gimp_canvas_canvas_boundary_stroke (GimpCanvasItem *item,
cairo_t *cr)
{
GimpDisplayShell *shell = gimp_canvas_item_get_shell (item);
gimp_canvas_set_canvas_style (gimp_canvas_item_get_canvas (item), cr,
shell->offset_x, shell->offset_y);
cairo_stroke (cr);
}
GimpCanvasItem *
gimp_canvas_canvas_boundary_new (GimpDisplayShell *shell)
{
g_return_val_if_fail (GIMP_IS_DISPLAY_SHELL (shell), NULL);
return g_object_new (GIMP_TYPE_CANVAS_CANVAS_BOUNDARY,
"shell", shell,
NULL);
}
void
gimp_canvas_canvas_boundary_set_image (GimpCanvasCanvasBoundary *boundary,
GimpImage *image)
{
GimpCanvasCanvasBoundaryPrivate *private;
g_return_if_fail (GIMP_IS_CANVAS_CANVAS_BOUNDARY (boundary));
g_return_if_fail (image == NULL || GIMP_IS_IMAGE (image));
private = GET_PRIVATE (boundary);
if (image != private->image)
{
gimp_canvas_item_begin_change (GIMP_CANVAS_ITEM (boundary));
if (image)
{
g_object_set (boundary,
"x", (gdouble) 0,
"y", (gdouble) 0,
"width", (gdouble) gimp_image_get_width (image),
"height", (gdouble) gimp_image_get_height (image),
NULL);
}
g_object_set (boundary,
"image", image,
NULL);
gimp_canvas_item_end_change (GIMP_CANVAS_ITEM (boundary));
}
else if (image && image == private->image)
{
gint lx, ly, lw, lh;
gdouble x, y, w ,h;
lx = 0;
ly = 0;
lw = gimp_image_get_width (image);
lh = gimp_image_get_height (image);
g_object_get (boundary,
"x", &x,
"y", &y,
"width", &w,
"height", &h,
NULL);
if (lx != (gint) x ||
ly != (gint) y ||
lw != (gint) w ||
lh != (gint) h)
{
gimp_canvas_item_begin_change (GIMP_CANVAS_ITEM (boundary));
g_object_set (boundary,
"x", (gdouble) lx,
"y", (gdouble) ly,
"width", (gdouble) lw,
"height", (gdouble) lh,
NULL);
gimp_canvas_item_end_change (GIMP_CANVAS_ITEM (boundary));
}
}
}
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