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gimp/app/display/gimpcanvassamplepoint.c

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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimpcanvassamplepoint.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 <http://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 "gimpcanvas.h"
#include "gimpcanvassamplepoint.h"
#include "gimpdisplayshell.h"
#include "gimpdisplayshell-style.h"
#include "gimpdisplayshell-transform.h"
#define GIMP_SAMPLE_POINT_DRAW_SIZE 10
enum
{
PROP_0,
PROP_X,
PROP_Y,
PROP_INDEX,
PROP_SAMPLE_POINT_STYLE
};
typedef struct _GimpCanvasSamplePointPrivate GimpCanvasSamplePointPrivate;
struct _GimpCanvasSamplePointPrivate
{
gint x;
gint y;
gint index;
gboolean sample_point_style;
};
#define GET_PRIVATE(sample_point) \
G_TYPE_INSTANCE_GET_PRIVATE (sample_point, \
GIMP_TYPE_CANVAS_SAMPLE_POINT, \
GimpCanvasSamplePointPrivate)
/* local function prototypes */
static void gimp_canvas_sample_point_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void gimp_canvas_sample_point_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec);
static void gimp_canvas_sample_point_draw (GimpCanvasItem *item,
GimpDisplayShell *shell,
cairo_t *cr);
static cairo_region_t * gimp_canvas_sample_point_get_extents (GimpCanvasItem *item,
GimpDisplayShell *shell);
static void gimp_canvas_sample_point_stroke (GimpCanvasItem *item,
GimpDisplayShell *shell,
cairo_t *cr);
static void gimp_canvas_sample_point_fill (GimpCanvasItem *item,
GimpDisplayShell *shell,
cairo_t *cr);
G_DEFINE_TYPE (GimpCanvasSamplePoint, gimp_canvas_sample_point,
GIMP_TYPE_CANVAS_ITEM)
#define parent_class gimp_canvas_sample_point_parent_class
static void
gimp_canvas_sample_point_class_init (GimpCanvasSamplePointClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GimpCanvasItemClass *item_class = GIMP_CANVAS_ITEM_CLASS (klass);
object_class->set_property = gimp_canvas_sample_point_set_property;
object_class->get_property = gimp_canvas_sample_point_get_property;
item_class->draw = gimp_canvas_sample_point_draw;
item_class->get_extents = gimp_canvas_sample_point_get_extents;
item_class->stroke = gimp_canvas_sample_point_stroke;
item_class->fill = gimp_canvas_sample_point_fill;
g_object_class_install_property (object_class, PROP_X,
g_param_spec_int ("x", NULL, NULL,
-GIMP_MAX_IMAGE_SIZE,
GIMP_MAX_IMAGE_SIZE, 0,
GIMP_PARAM_READWRITE));
g_object_class_install_property (object_class, PROP_Y,
g_param_spec_int ("y", NULL, NULL,
-GIMP_MAX_IMAGE_SIZE,
GIMP_MAX_IMAGE_SIZE, 0,
GIMP_PARAM_READWRITE));
g_object_class_install_property (object_class, PROP_INDEX,
g_param_spec_int ("index", NULL, NULL,
0, G_MAXINT, 0,
GIMP_PARAM_READWRITE));
g_object_class_install_property (object_class, PROP_SAMPLE_POINT_STYLE,
g_param_spec_boolean ("sample-point-style",
NULL, NULL,
FALSE,
GIMP_PARAM_READWRITE));
g_type_class_add_private (klass, sizeof (GimpCanvasSamplePointPrivate));
}
static void
gimp_canvas_sample_point_init (GimpCanvasSamplePoint *sample_point)
{
}
static void
gimp_canvas_sample_point_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
GimpCanvasSamplePointPrivate *private = GET_PRIVATE (object);
switch (property_id)
{
case PROP_X:
private->x = g_value_get_int (value);
break;
case PROP_Y:
private->y = g_value_get_int (value);
break;
case PROP_INDEX:
private->index = g_value_get_int (value);
break;
case PROP_SAMPLE_POINT_STYLE:
private->sample_point_style = g_value_get_boolean (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_canvas_sample_point_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
GimpCanvasSamplePointPrivate *private = GET_PRIVATE (object);
switch (property_id)
{
case PROP_X:
g_value_set_int (value, private->x);
break;
case PROP_Y:
g_value_set_int (value, private->x);
break;
case PROP_INDEX:
g_value_set_int (value, private->x);
break;
case PROP_SAMPLE_POINT_STYLE:
g_value_set_boolean (value, private->sample_point_style);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_canvas_sample_point_transform (GimpCanvasItem *item,
GimpDisplayShell *shell,
gdouble *x,
gdouble *y)
{
GimpCanvasSamplePointPrivate *private = GET_PRIVATE (item);
gimp_display_shell_transform_xy_f (shell,
private->x + 0.5,
private->y + 0.5,
x, y);
*x = floor (*x) + 0.5;
*y = floor (*y) + 0.5;
}
#define HALF_SIZE (GIMP_SAMPLE_POINT_DRAW_SIZE / 2)
static void
gimp_canvas_sample_point_draw (GimpCanvasItem *item,
GimpDisplayShell *shell,
cairo_t *cr)
{
GimpCanvasSamplePointPrivate *private = GET_PRIVATE (item);
PangoLayout *layout;
gdouble x, y;
gint x1, x2, y1, y2;
gimp_canvas_sample_point_transform (item, shell, &x, &y);
x1 = x - GIMP_SAMPLE_POINT_DRAW_SIZE;
x2 = x + GIMP_SAMPLE_POINT_DRAW_SIZE;
y1 = y - GIMP_SAMPLE_POINT_DRAW_SIZE;
y2 = y + GIMP_SAMPLE_POINT_DRAW_SIZE;
cairo_move_to (cr, x, y1);
cairo_line_to (cr, x, y1 + HALF_SIZE);
cairo_move_to (cr, x, y2);
cairo_line_to (cr, x, y2 - HALF_SIZE);
cairo_move_to (cr, x1, y);
cairo_line_to (cr, x1 + HALF_SIZE, y);
cairo_move_to (cr, x2, y);
cairo_line_to (cr, x2 - HALF_SIZE, y);
cairo_arc_negative (cr, x, y, HALF_SIZE, 0.0, 0.5 * G_PI);
_gimp_canvas_item_stroke (item, cr);
layout = gimp_canvas_get_layout (GIMP_CANVAS (shell->canvas),
"%d", private->index);
cairo_move_to (cr, x + 2.5, y + 2.5);
pango_cairo_show_layout (cr, layout);
_gimp_canvas_item_fill (item, cr);
}
static cairo_region_t *
gimp_canvas_sample_point_get_extents (GimpCanvasItem *item,
GimpDisplayShell *shell)
{
cairo_rectangle_int_t rectangle;
gdouble x, y;
gint x1, x2, y1, y2;
gimp_canvas_sample_point_transform (item, shell, &x, &y);
x1 = floor (x - GIMP_SAMPLE_POINT_DRAW_SIZE);
x2 = ceil (x + GIMP_SAMPLE_POINT_DRAW_SIZE);
y1 = floor (y - GIMP_SAMPLE_POINT_DRAW_SIZE);
y2 = ceil (y + GIMP_SAMPLE_POINT_DRAW_SIZE);
rectangle.x = x1 - 1.5;
rectangle.y = y1 - 1.5;
rectangle.width = x2 - x1 + 3.0;
rectangle.height = y2 - y1 + 3.0;
/* HACK: add 5 so the number gets cleared too */
rectangle.width += 5;
rectangle.height += 5;
return cairo_region_create_rectangle (&rectangle);
}
static void
gimp_canvas_sample_point_stroke (GimpCanvasItem *item,
GimpDisplayShell *shell,
cairo_t *cr)
{
GimpCanvasSamplePointPrivate *private = GET_PRIVATE (item);
if (private->sample_point_style)
{
gimp_display_shell_set_sample_point_style (shell, cr,
gimp_canvas_item_get_highlight (item));
cairo_stroke (cr);
}
else
{
GIMP_CANVAS_ITEM_CLASS (parent_class)->stroke (item, shell, cr);
}
}
static void
gimp_canvas_sample_point_fill (GimpCanvasItem *item,
GimpDisplayShell *shell,
cairo_t *cr)
{
GimpCanvasSamplePointPrivate *private = GET_PRIVATE (item);
if (private->sample_point_style)
{
gimp_display_shell_set_sample_point_style (shell, cr,
gimp_canvas_item_get_highlight (item));
cairo_fill (cr);
}
else
{
GIMP_CANVAS_ITEM_CLASS (parent_class)->fill (item, shell, cr);
}
}
GimpCanvasItem *
gimp_canvas_sample_point_new (GimpDisplayShell *shell,
gint x,
gint y,
gint index,
gboolean sample_point_style)
{
g_return_val_if_fail (GIMP_IS_DISPLAY_SHELL (shell), NULL);
return g_object_new (GIMP_TYPE_CANVAS_SAMPLE_POINT,
"shell", shell,
"x", x,
"y", y,
"index", index,
"sample-point-style", sample_point_style,
NULL);
}
void
gimp_canvas_sample_point_set (GimpCanvasItem *sample_point,
gint x,
gint y)
{
g_return_if_fail (GIMP_IS_CANVAS_SAMPLE_POINT (sample_point));
gimp_canvas_item_begin_change (sample_point);
g_object_set (sample_point,
"x", x,
"y", y,
NULL);
gimp_canvas_item_end_change (sample_point);
}
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