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gimp/app/display/gimpcanvascorner.c

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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimpcanvascorner.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 "gimpcanvascorner.h"
#include "gimpdisplayshell.h"
enum
{
PROP_0,
PROP_X,
PROP_Y,
PROP_WIDTH,
PROP_HEIGHT,
PROP_ANCHOR,
PROP_CORNER_WIDTH,
PROP_CORNER_HEIGHT,
PROP_OUTSIDE
};
typedef struct _GimpCanvasCornerPrivate GimpCanvasCornerPrivate;
struct _GimpCanvasCornerPrivate
{
gdouble x;
gdouble y;
gdouble width;
gdouble height;
GimpHandleAnchor anchor;
gint corner_width;
gint corner_height;
gboolean outside;
};
#define GET_PRIVATE(corner) \
G_TYPE_INSTANCE_GET_PRIVATE (corner, \
GIMP_TYPE_CANVAS_CORNER, \
GimpCanvasCornerPrivate)
/* local function prototypes */
static void gimp_canvas_corner_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void gimp_canvas_corner_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec);
static void gimp_canvas_corner_draw (GimpCanvasItem *item,
cairo_t *cr);
static cairo_region_t * gimp_canvas_corner_get_extents (GimpCanvasItem *item);
G_DEFINE_TYPE (GimpCanvasCorner, gimp_canvas_corner,
GIMP_TYPE_CANVAS_ITEM)
#define parent_class gimp_canvas_corner_parent_class
static void
gimp_canvas_corner_class_init (GimpCanvasCornerClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GimpCanvasItemClass *item_class = GIMP_CANVAS_ITEM_CLASS (klass);
object_class->set_property = gimp_canvas_corner_set_property;
object_class->get_property = gimp_canvas_corner_get_property;
item_class->draw = gimp_canvas_corner_draw;
item_class->get_extents = gimp_canvas_corner_get_extents;
g_object_class_install_property (object_class, PROP_X,
g_param_spec_double ("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_double ("y", NULL, NULL,
-GIMP_MAX_IMAGE_SIZE,
GIMP_MAX_IMAGE_SIZE, 0,
GIMP_PARAM_READWRITE));
g_object_class_install_property (object_class, PROP_WIDTH,
g_param_spec_double ("width", NULL, NULL,
-GIMP_MAX_IMAGE_SIZE,
GIMP_MAX_IMAGE_SIZE, 0,
GIMP_PARAM_READWRITE));
g_object_class_install_property (object_class, PROP_HEIGHT,
g_param_spec_double ("height", NULL, NULL,
-GIMP_MAX_IMAGE_SIZE,
GIMP_MAX_IMAGE_SIZE, 0,
GIMP_PARAM_READWRITE));
g_object_class_install_property (object_class, PROP_ANCHOR,
g_param_spec_enum ("anchor", NULL, NULL,
GIMP_TYPE_HANDLE_ANCHOR,
GIMP_HANDLE_ANCHOR_CENTER,
GIMP_PARAM_READWRITE));
g_object_class_install_property (object_class, PROP_CORNER_WIDTH,
g_param_spec_int ("corner-width", NULL, NULL,
3, GIMP_MAX_IMAGE_SIZE, 3,
GIMP_PARAM_READWRITE));
g_object_class_install_property (object_class, PROP_CORNER_HEIGHT,
g_param_spec_int ("corner-height", NULL, NULL,
3, GIMP_MAX_IMAGE_SIZE, 3,
GIMP_PARAM_READWRITE));
g_object_class_install_property (object_class, PROP_OUTSIDE,
g_param_spec_boolean ("outside", NULL, NULL,
FALSE,
GIMP_PARAM_READWRITE));
g_type_class_add_private (klass, sizeof (GimpCanvasCornerPrivate));
}
static void
gimp_canvas_corner_init (GimpCanvasCorner *corner)
{
}
static void
gimp_canvas_corner_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
GimpCanvasCornerPrivate *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_ANCHOR:
private->anchor = g_value_get_enum (value);
break;
case PROP_CORNER_WIDTH:
private->corner_width = g_value_get_int (value);
break;
case PROP_CORNER_HEIGHT:
private->corner_height = g_value_get_int (value);
break;
case PROP_OUTSIDE:
private->outside = g_value_get_boolean (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_canvas_corner_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
GimpCanvasCornerPrivate *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_ANCHOR:
g_value_set_enum (value, private->anchor);
break;
case PROP_CORNER_WIDTH:
g_value_set_int (value, private->corner_width);
break;
case PROP_CORNER_HEIGHT:
g_value_set_int (value, private->corner_height);
break;
case PROP_OUTSIDE:
g_value_set_boolean (value, private->outside);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_canvas_corner_transform (GimpCanvasItem *item,
gdouble *x,
gdouble *y,
gdouble *w,
gdouble *h)
{
GimpCanvasCornerPrivate *private = GET_PRIVATE (item);
gdouble rx, ry;
gdouble rw, rh;
gint top_and_bottom_handle_x_offset;
gint left_and_right_handle_y_offset;
gimp_canvas_item_transform_xy_f (item,
MIN (private->x,
private->x + private->width),
MIN (private->y,
private->y + private->height),
&rx, &ry);
gimp_canvas_item_transform_xy_f (item,
MAX (private->x,
private->x + private->width),
MAX (private->y,
private->y + private->height),
&rw, &rh);
rw -= rx;
rh -= ry;
rx = floor (rx) + 0.5;
ry = floor (ry) + 0.5;
rw = ceil (rw) - 1.0;
rh = ceil (rh) - 1.0;
top_and_bottom_handle_x_offset = (rw - private->corner_width) / 2;
left_and_right_handle_y_offset = (rh - private->corner_height) / 2;
*w = private->corner_width;
*h = private->corner_height;
switch (private->anchor)
{
case GIMP_HANDLE_ANCHOR_CENTER:
break;
case GIMP_HANDLE_ANCHOR_NORTH_WEST:
if (private->outside)
{
*x = rx - private->corner_width;
*y = ry - private->corner_height;
}
else
{
*x = rx;
*y = ry;
}
break;
case GIMP_HANDLE_ANCHOR_NORTH_EAST:
if (private->outside)
{
*x = rx + rw;
*y = ry - private->corner_height;
}
else
{
*x = rx + rw - private->corner_width;
*y = ry;
}
break;
case GIMP_HANDLE_ANCHOR_SOUTH_WEST:
if (private->outside)
{
*x = rx - private->corner_width;
*y = ry + rh;
}
else
{
*x = rx;
*y = ry + rh - private->corner_height;
}
break;
case GIMP_HANDLE_ANCHOR_SOUTH_EAST:
if (private->outside)
{
*x = rx + rw;
*y = ry + rh;
}
else
{
*x = rx + rw - private->corner_width;
*y = ry + rh - private->corner_height;
}
break;
case GIMP_HANDLE_ANCHOR_NORTH:
if (private->outside)
{
*x = rx;
*y = ry - private->corner_height;
*w = rw;
}
else
{
*x = rx + top_and_bottom_handle_x_offset;
*y = ry;
}
break;
case GIMP_HANDLE_ANCHOR_SOUTH:
if (private->outside)
{
*x = rx;
*y = ry + rh;
*w = rw;
}
else
{
*x = rx + top_and_bottom_handle_x_offset;
*y = ry + rh - private->corner_height;
}
break;
case GIMP_HANDLE_ANCHOR_WEST:
if (private->outside)
{
*x = rx - private->corner_width;
*y = ry;
*h = rh;
}
else
{
*x = rx;
*y = ry + left_and_right_handle_y_offset;
}
break;
case GIMP_HANDLE_ANCHOR_EAST:
if (private->outside)
{
*x = rx + rw;
*y = ry;
*h = rh;
}
else
{
*x = rx + rw - private->corner_width;
*y = ry + left_and_right_handle_y_offset;
}
break;
}
}
static void
gimp_canvas_corner_draw (GimpCanvasItem *item,
cairo_t *cr)
{
gdouble x, y;
gdouble w, h;
gimp_canvas_corner_transform (item, &x, &y, &w, &h);
cairo_rectangle (cr, x, y, w, h);
_gimp_canvas_item_stroke (item, cr);
}
static cairo_region_t *
gimp_canvas_corner_get_extents (GimpCanvasItem *item)
{
cairo_rectangle_int_t rectangle;
gdouble x, y;
gdouble w, h;
gimp_canvas_corner_transform (item, &x, &y, &w, &h);
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);
}
GimpCanvasItem *
gimp_canvas_corner_new (GimpDisplayShell *shell,
gdouble x,
gdouble y,
gdouble width,
gdouble height,
GimpHandleAnchor anchor,
gint corner_width,
gint corner_height,
gboolean outside)
{
g_return_val_if_fail (GIMP_IS_DISPLAY_SHELL (shell), NULL);
return g_object_new (GIMP_TYPE_CANVAS_CORNER,
"shell", shell,
"x", x,
"y", y,
"width", width,
"height", height,
"anchor", anchor,
"corner-width", corner_width,
"corner-height", corner_height,
"outside", outside,
NULL);
}
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