dnrops
/
gimp
mirror of https://github.com/GNOME/gimp.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity
gimp/app/display/gimpcanvashandle.c

704 lines
22 KiB
C
Raw Blame History

/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimpcanvashandle.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 <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/gimp-cairo.h"
#include "gimpcanvashandle.h"
#include "gimpcanvasitem-utils.h"
#include "gimpdisplayshell.h"
#define N_DASHES 8
#define DASH_ON_RATIO 0.3
#define DASH_OFF_RATIO 0.7
enum
{
PROP_0,
PROP_TYPE,
PROP_ANCHOR,
PROP_X,
PROP_Y,
PROP_WIDTH,
PROP_HEIGHT,
PROP_START_ANGLE,
PROP_SLICE_ANGLE
};
typedef struct _GimpCanvasHandlePrivate GimpCanvasHandlePrivate;
struct _GimpCanvasHandlePrivate
{
GimpHandleType type;
GimpHandleAnchor anchor;
gdouble x;
gdouble y;
gint width;
gint height;
gdouble start_angle;
gdouble slice_angle;
};
#define GET_PRIVATE(handle) \
((GimpCanvasHandlePrivate *) gimp_canvas_handle_get_instance_private ((GimpCanvasHandle *) (handle)))
/* local function prototypes */
static void gimp_canvas_handle_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void gimp_canvas_handle_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec);
static void gimp_canvas_handle_draw (GimpCanvasItem *item,
cairo_t *cr);
static cairo_region_t * gimp_canvas_handle_get_extents (GimpCanvasItem *item);
static gboolean gimp_canvas_handle_hit (GimpCanvasItem *item,
gdouble x,
gdouble y);
G_DEFINE_TYPE_WITH_PRIVATE (GimpCanvasHandle, gimp_canvas_handle,
GIMP_TYPE_CANVAS_ITEM)
#define parent_class gimp_canvas_handle_parent_class
static void
gimp_canvas_handle_class_init (GimpCanvasHandleClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GimpCanvasItemClass *item_class = GIMP_CANVAS_ITEM_CLASS (klass);
object_class->set_property = gimp_canvas_handle_set_property;
object_class->get_property = gimp_canvas_handle_get_property;
item_class->draw = gimp_canvas_handle_draw;
item_class->get_extents = gimp_canvas_handle_get_extents;
item_class->hit = gimp_canvas_handle_hit;
g_object_class_install_property (object_class, PROP_TYPE,
g_param_spec_enum ("type", NULL, NULL,
GIMP_TYPE_HANDLE_TYPE,
GIMP_HANDLE_CROSS,
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_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_int ("width", NULL, NULL,
3, 1001, 7,
GIMP_PARAM_READWRITE));
g_object_class_install_property (object_class, PROP_HEIGHT,
g_param_spec_int ("height", NULL, NULL,
3, 1001, 7,
GIMP_PARAM_READWRITE));
g_object_class_install_property (object_class, PROP_START_ANGLE,
g_param_spec_double ("start-angle", NULL, NULL,
-1000, 1000, 0,
GIMP_PARAM_READWRITE));
g_object_class_install_property (object_class, PROP_SLICE_ANGLE,
g_param_spec_double ("slice-angle", NULL, NULL,
-1000, 1000, 2 * G_PI,
GIMP_PARAM_READWRITE));
}
static void
gimp_canvas_handle_init (GimpCanvasHandle *handle)
{
GimpCanvasHandlePrivate *private = GET_PRIVATE (handle);
gimp_canvas_item_set_line_cap (GIMP_CANVAS_ITEM (handle),
CAIRO_LINE_CAP_SQUARE);
private->start_angle = 0.0;
private->slice_angle = 2.0 * G_PI;
}
static void
gimp_canvas_handle_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
GimpCanvasHandlePrivate *private = GET_PRIVATE (object);
switch (property_id)
{
case PROP_TYPE:
private->type = g_value_get_enum (value);
break;
case PROP_ANCHOR:
private->anchor = g_value_get_enum (value);
break;
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_int (value);
break;
case PROP_HEIGHT:
private->height = g_value_get_int (value);
break;
case PROP_START_ANGLE:
private->start_angle = g_value_get_double (value);
break;
case PROP_SLICE_ANGLE:
private->slice_angle = g_value_get_double (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_canvas_handle_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
GimpCanvasHandlePrivate *private = GET_PRIVATE (object);
switch (property_id)
{
case PROP_TYPE:
g_value_set_enum (value, private->type);
break;
case PROP_ANCHOR:
g_value_set_enum (value, private->anchor);
break;
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_int (value, private->width);
break;
case PROP_HEIGHT:
g_value_set_int (value, private->height);
break;
case PROP_START_ANGLE:
g_value_set_double (value, private->start_angle);
break;
case PROP_SLICE_ANGLE:
g_value_set_double (value, private->slice_angle);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_canvas_handle_transform (GimpCanvasItem *item,
gdouble *x,
gdouble *y)
{
GimpCanvasHandlePrivate *private = GET_PRIVATE (item);
gimp_canvas_item_transform_xy_f (item,
private->x, private->y,
x, y);
switch (private->type)
{
case GIMP_HANDLE_SQUARE:
case GIMP_HANDLE_DASHED_SQUARE:
case GIMP_HANDLE_FILLED_SQUARE:
gimp_canvas_item_shift_to_north_west (private->anchor,
*x, *y,
private->width,
private->height,
x, y);
break;
case GIMP_HANDLE_CIRCLE:
case GIMP_HANDLE_DASHED_CIRCLE:
case GIMP_HANDLE_FILLED_CIRCLE:
case GIMP_HANDLE_CROSS:
case GIMP_HANDLE_CROSSHAIR:
case GIMP_HANDLE_DIAMOND:
case GIMP_HANDLE_DASHED_DIAMOND:
case GIMP_HANDLE_FILLED_DIAMOND:
gimp_canvas_item_shift_to_center (private->anchor,
*x, *y,
private->width,
private->height,
x, y);
break;
default:
break;
}
*x = floor (*x) + 0.5;
*y = floor (*y) + 0.5;
}
static void
gimp_canvas_handle_draw (GimpCanvasItem *item,
cairo_t *cr)
{
GimpCanvasHandlePrivate *private = GET_PRIVATE (item);
gdouble x, y, tx, ty;
gimp_canvas_handle_transform (item, &x, &y);
gimp_canvas_item_transform_xy_f (item,
private->x, private->y,
&tx, &ty);
tx = floor (tx) + 0.5;
ty = floor (ty) + 0.5;
switch (private->type)
{
case GIMP_HANDLE_SQUARE:
case GIMP_HANDLE_DASHED_SQUARE:
case GIMP_HANDLE_FILLED_SQUARE:
case GIMP_HANDLE_DIAMOND:
case GIMP_HANDLE_DASHED_DIAMOND:
case GIMP_HANDLE_FILLED_DIAMOND:
case GIMP_HANDLE_CROSS:
cairo_save (cr);
cairo_translate (cr, tx, ty);
cairo_rotate (cr, private->start_angle);
cairo_translate (cr, -tx, -ty);
switch (private->type)
{
case GIMP_HANDLE_SQUARE:
case GIMP_HANDLE_DASHED_SQUARE:
if (private->type == GIMP_HANDLE_DASHED_SQUARE)
{
gdouble circ;
gdouble dashes[2];
cairo_save (cr);
circ = 2.0 * ((private->width - 1.0) + (private->height - 1.0));
dashes[0] = (circ / N_DASHES) * DASH_ON_RATIO;
dashes[1] = (circ / N_DASHES) * DASH_OFF_RATIO;
cairo_set_dash (cr, dashes, 2, dashes[0] / 2.0);
}
cairo_rectangle (cr, x, y, private->width - 1.0, private->height - 1.0);
_gimp_canvas_item_stroke (item, cr);
if (private->type == GIMP_HANDLE_DASHED_SQUARE)
cairo_restore (cr);
break;
case GIMP_HANDLE_FILLED_SQUARE:
cairo_rectangle (cr, x - 0.5, y - 0.5, private->width, private->height);
_gimp_canvas_item_fill (item, cr);
break;
case GIMP_HANDLE_DIAMOND:
case GIMP_HANDLE_DASHED_DIAMOND:
case GIMP_HANDLE_FILLED_DIAMOND:
if (private->type == GIMP_HANDLE_DASHED_DIAMOND)
{
gdouble circ;
gdouble dashes[2];
cairo_save (cr);
circ = 4.0 * hypot ((gdouble) private->width / 2.0,
(gdouble) private->height / 2.0);
dashes[0] = (circ / N_DASHES) * DASH_ON_RATIO;
dashes[1] = (circ / N_DASHES) * DASH_OFF_RATIO;
cairo_set_dash (cr, dashes, 2, dashes[0] / 2.0);
}
cairo_move_to (cr, x, y - (gdouble) private->height / 2.0);
cairo_line_to (cr, x + (gdouble) private->width / 2.0, y);
cairo_line_to (cr, x, y + (gdouble) private->height / 2.0);
cairo_line_to (cr, x - (gdouble) private->width / 2.0, y);
cairo_line_to (cr, x, y - (gdouble) private->height / 2.0);
if (private->type == GIMP_HANDLE_DIAMOND ||
private->type == GIMP_HANDLE_DASHED_DIAMOND)
_gimp_canvas_item_stroke (item, cr);
else
_gimp_canvas_item_fill (item, cr);
if (private->type == GIMP_HANDLE_DASHED_SQUARE)
cairo_restore (cr);
break;
case GIMP_HANDLE_CROSS:
cairo_move_to (cr, x - private->width / 2.0, y);
cairo_line_to (cr, x + private->width / 2.0 - 0.5, y);
cairo_move_to (cr, x, y - private->height / 2.0);
cairo_line_to (cr, x, y + private->height / 2.0 - 0.5);
_gimp_canvas_item_stroke (item, cr);
break;
default:
gimp_assert_not_reached ();
}
cairo_restore (cr);
break;
case GIMP_HANDLE_CIRCLE:
case GIMP_HANDLE_DASHED_CIRCLE:
if (private->type == GIMP_HANDLE_DASHED_CIRCLE)
{
gdouble circ;
gdouble dashes[2];
cairo_save (cr);
circ = 2.0 * G_PI * (private->width / 2.0);
dashes[0] = (circ / N_DASHES) * DASH_ON_RATIO;
dashes[1] = (circ / N_DASHES) * DASH_OFF_RATIO;
cairo_set_dash (cr, dashes, 2, dashes[0] / 2.0);
}
gimp_cairo_arc (cr, x, y, private->width / 2.0,
private->start_angle,
private->slice_angle);
_gimp_canvas_item_stroke (item, cr);
if (private->type == GIMP_HANDLE_DASHED_CIRCLE)
cairo_restore (cr);
break;
case GIMP_HANDLE_FILLED_CIRCLE:
cairo_move_to (cr, x, y);
gimp_cairo_arc (cr, x, y, (gdouble) private->width / 2.0,
private->start_angle,
private->slice_angle);
_gimp_canvas_item_fill (item, cr);
break;
case GIMP_HANDLE_CROSSHAIR:
cairo_move_to (cr, x - private->width / 2.0, y);
cairo_line_to (cr, x - private->width * 0.4, y);
cairo_move_to (cr, x + private->width / 2.0 - 0.5, y);
cairo_line_to (cr, x + private->width * 0.4, y);
cairo_move_to (cr, x, y - private->height / 2.0);
cairo_line_to (cr, x, y - private->height * 0.4 - 0.5);
cairo_move_to (cr, x, y + private->height / 2.0 - 0.5);
cairo_line_to (cr, x, y + private->height * 0.4 - 0.5);
_gimp_canvas_item_stroke (item, cr);
break;
default:
break;
}
}
static cairo_region_t *
gimp_canvas_handle_get_extents (GimpCanvasItem *item)
{
GimpCanvasHandlePrivate *private = GET_PRIVATE (item);
cairo_rectangle_int_t rectangle;
gdouble x, y;
gdouble w, h;
gimp_canvas_handle_transform (item, &x, &y);
switch (private->type)
{
case GIMP_HANDLE_SQUARE:
case GIMP_HANDLE_DASHED_SQUARE:
case GIMP_HANDLE_FILLED_SQUARE:
w = private->width * (sqrt(2) - 1) / 2;
h = private->height * (sqrt(2) - 1) / 2;
rectangle.x = x - 1.5 - w;
rectangle.y = y - 1.5 - h;
rectangle.width = private->width + 3.0 + w * 2;
rectangle.height = private->height + 3.0 + h * 2;
break;
case GIMP_HANDLE_CIRCLE:
case GIMP_HANDLE_DASHED_CIRCLE:
case GIMP_HANDLE_FILLED_CIRCLE:
case GIMP_HANDLE_CROSS:
case GIMP_HANDLE_CROSSHAIR:
case GIMP_HANDLE_DIAMOND:
case GIMP_HANDLE_DASHED_DIAMOND:
case GIMP_HANDLE_FILLED_DIAMOND:
rectangle.x = x - private->width / 2.0 - 2.0;
rectangle.y = y - private->height / 2.0 - 2.0;
rectangle.width = private->width + 4.0;
rectangle.height = private->height + 4.0;
break;
default:
break;
}
return cairo_region_create_rectangle (&rectangle);
}
static gboolean
gimp_canvas_handle_hit (GimpCanvasItem *item,
gdouble x,
gdouble y)
{
GimpCanvasHandlePrivate *private = GET_PRIVATE (item);
gdouble handle_tx, handle_ty;
gdouble mx, my, tx, ty, mmx, mmy;
gdouble diamond_offset_x = 0.0;
gdouble diamond_offset_y = 0.0;
gdouble angle = -private->start_angle;
gimp_canvas_handle_transform (item, &handle_tx, &handle_ty);
gimp_canvas_item_transform_xy_f (item,
x, y,
&mx, &my);
switch (private->type)
{
case GIMP_HANDLE_DIAMOND:
case GIMP_HANDLE_DASHED_DIAMOND:
case GIMP_HANDLE_FILLED_DIAMOND:
angle -= G_PI / 4.0;
diamond_offset_x = private->width / 2.0;
diamond_offset_y = private->height / 2.0;
case GIMP_HANDLE_SQUARE:
case GIMP_HANDLE_DASHED_SQUARE:
case GIMP_HANDLE_FILLED_SQUARE:
gimp_canvas_item_transform_xy_f (item,
private->x, private->y,
&tx, &ty);
mmx = mx - tx; mmy = my - ty;
mx = cos (angle) * mmx - sin (angle) * mmy + tx + diamond_offset_x;
my = sin (angle) * mmx + cos (angle) * mmy + ty + diamond_offset_y;
return mx > handle_tx && mx < handle_tx + private->width &&
my > handle_ty && my < handle_ty + private->height;
case GIMP_HANDLE_CIRCLE:
case GIMP_HANDLE_DASHED_CIRCLE:
case GIMP_HANDLE_FILLED_CIRCLE:
case GIMP_HANDLE_CROSS:
case GIMP_HANDLE_CROSSHAIR:
{
gint width = private->width;
if (width != private->height)
width = (width + private->height) / 2;
width /= 2;
return ((SQR (handle_tx - mx) + SQR (handle_ty - my)) < SQR (width));
}
default:
break;
}
return FALSE;
}
GimpCanvasItem *
gimp_canvas_handle_new (GimpDisplayShell *shell,
GimpHandleType type,
GimpHandleAnchor anchor,
gdouble x,
gdouble y,
gint width,
gint height)
{
g_return_val_if_fail (GIMP_IS_DISPLAY_SHELL (shell), NULL);
return g_object_new (GIMP_TYPE_CANVAS_HANDLE,
"shell", shell,
"type", type,
"anchor", anchor,
"x", x,
"y", y,
"width", width,
"height", height,
NULL);
}
void
gimp_canvas_handle_get_position (GimpCanvasItem *handle,
gdouble *x,
gdouble *y)
{
g_return_if_fail (GIMP_IS_CANVAS_HANDLE (handle));
g_return_if_fail (x != NULL);
g_return_if_fail (y != NULL);
g_object_get (handle,
"x", x,
"y", y,
NULL);
}
void
gimp_canvas_handle_set_position (GimpCanvasItem *handle,
gdouble x,
gdouble y)
{
g_return_if_fail (GIMP_IS_CANVAS_HANDLE (handle));
gimp_canvas_item_begin_change (handle);
g_object_set (handle,
"x", x,
"y", y,
NULL);
gimp_canvas_item_end_change (handle);
}
gint
gimp_canvas_handle_calc_size (GimpCanvasItem *item,
gdouble mouse_x,
gdouble mouse_y,
gint normal_size,
gint hover_size)
{
gdouble x, y;
gdouble distance;
gdouble size;
gint full_threshold_sq = SQR (hover_size / 2) * 9;
gint partial_threshold_sq = full_threshold_sq * 5;
g_return_val_if_fail (GIMP_IS_CANVAS_HANDLE (item), normal_size);
gimp_canvas_handle_get_position (item, &x, &y);
distance = gimp_canvas_item_transform_distance_square (item,
mouse_x,
mouse_y,
x, y);
/* calculate the handle size based on distance from the cursor */
size = (1.0 - (distance - full_threshold_sq) /
(partial_threshold_sq - full_threshold_sq));
size = CLAMP (size, 0.0, 1.0);
return (gint) CLAMP ((size * hover_size),
normal_size,
hover_size);
}
void
gimp_canvas_handle_get_size (GimpCanvasItem *handle,
gint *width,
gint *height)
{
g_return_if_fail (GIMP_IS_CANVAS_HANDLE (handle));
g_return_if_fail (width != NULL);
g_return_if_fail (height != NULL);
g_object_get (handle,
"width", width,
"height", height,
NULL);
}
void
gimp_canvas_handle_set_size (GimpCanvasItem *handle,
gint width,
gint height)
{
g_return_if_fail (GIMP_IS_CANVAS_HANDLE (handle));
gimp_canvas_item_begin_change (handle);
g_object_set (handle,
"width", width,
"height", height,
NULL);
gimp_canvas_item_end_change (handle);
}
void
gimp_canvas_handle_set_angles (GimpCanvasItem *handle,
gdouble start_angle,
gdouble slice_angle)
{
g_return_if_fail (GIMP_IS_CANVAS_HANDLE (handle));
gimp_canvas_item_begin_change (handle);
g_object_set (handle,
"start-angle", start_angle,
"slice-angle", slice_angle,
NULL);
gimp_canvas_item_end_change (handle);
}
Reference in New Issue View Git Blame Copy Permalink