Commit 46836d95 authored by Michael Natterer's avatar Michael Natterer 😴
Browse files

app: add a canvas line class

parent f17cc009
......@@ -21,6 +21,8 @@ libappdisplay_a_sources = \
gimpcanvas.h \
gimpcanvasitem.c \
gimpcanvasitem.h \
gimpcanvasline.c \
gimpcanvasline.h \
gimpcanvasrectangle.c \
gimpcanvasrectangle.h \
gimpcursorview.c \
......
/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimpcanvasline.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 "gimpcanvasline.h"
#include "gimpdisplayshell.h"
#include "gimpdisplayshell-transform.h"
enum
{
PROP_0,
PROP_X1,
PROP_Y1,
PROP_X2,
PROP_Y2
};
typedef struct _GimpCanvasLinePrivate GimpCanvasLinePrivate;
struct _GimpCanvasLinePrivate
{
gdouble x1;
gdouble y1;
gdouble x2;
gdouble y2;
};
#define GET_PRIVATE(line) \
G_TYPE_INSTANCE_GET_PRIVATE (line, \
GIMP_TYPE_CANVAS_LINE, \
GimpCanvasLinePrivate)
/* local function prototypes */
static void gimp_canvas_line_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void gimp_canvas_line_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec);
static void gimp_canvas_line_draw (GimpCanvasItem *item,
GimpDisplayShell *shell,
cairo_t *cr);
static GdkRegion * gimp_canvas_line_get_extents (GimpCanvasItem *item,
GimpDisplayShell *shell);
G_DEFINE_TYPE (GimpCanvasLine, gimp_canvas_line,
GIMP_TYPE_CANVAS_ITEM)
#define parent_class gimp_canvas_line_parent_class
static void
gimp_canvas_line_class_init (GimpCanvasLineClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GimpCanvasItemClass *item_class = GIMP_CANVAS_ITEM_CLASS (klass);
object_class->set_property = gimp_canvas_line_set_property;
object_class->get_property = gimp_canvas_line_get_property;
item_class->draw = gimp_canvas_line_draw;
item_class->get_extents = gimp_canvas_line_get_extents;
g_object_class_install_property (object_class, PROP_X1,
g_param_spec_double ("x1", NULL, NULL,
-GIMP_MAX_IMAGE_SIZE,
GIMP_MAX_IMAGE_SIZE, 0,
GIMP_PARAM_READWRITE));
g_object_class_install_property (object_class, PROP_Y1,
g_param_spec_double ("y1", NULL, NULL,
-GIMP_MAX_IMAGE_SIZE,
GIMP_MAX_IMAGE_SIZE, 0,
GIMP_PARAM_READWRITE));
g_object_class_install_property (object_class, PROP_X2,
g_param_spec_double ("x2", NULL, NULL,
-GIMP_MAX_IMAGE_SIZE,
GIMP_MAX_IMAGE_SIZE, 0,
GIMP_PARAM_READWRITE));
g_object_class_install_property (object_class, PROP_Y2,
g_param_spec_double ("y2", NULL, NULL,
-GIMP_MAX_IMAGE_SIZE,
GIMP_MAX_IMAGE_SIZE, 0,
GIMP_PARAM_READWRITE));
g_type_class_add_private (klass, sizeof (GimpCanvasLinePrivate));
}
static void
gimp_canvas_line_init (GimpCanvasLine *line)
{
}
static void
gimp_canvas_line_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
GimpCanvasLinePrivate *private = GET_PRIVATE (object);
switch (property_id)
{
case PROP_X1:
private->x1 = g_value_get_double (value);
break;
case PROP_Y1:
private->y1 = g_value_get_double (value);
break;
case PROP_X2:
private->x2 = g_value_get_double (value);
break;
case PROP_Y2:
private->y2 = g_value_get_double (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_canvas_line_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
GimpCanvasLinePrivate *private = GET_PRIVATE (object);
switch (property_id)
{
case PROP_X1:
g_value_set_double (value, private->x1);
break;
case PROP_Y1:
g_value_set_double (value, private->y1);
break;
case PROP_X2:
g_value_set_double (value, private->x2);
break;
case PROP_Y2:
g_value_set_double (value, private->y2);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_canvas_line_transform (GimpCanvasItem *item,
GimpDisplayShell *shell,
gdouble *x1,
gdouble *y1,
gdouble *x2,
gdouble *y2)
{
GimpCanvasLinePrivate *private = GET_PRIVATE (item);
gimp_display_shell_transform_xy_f (shell,
private->x1, private->y1,
x1, y1,
FALSE);
gimp_display_shell_transform_xy_f (shell,
private->x2, private->y2,
x2, y2,
FALSE);
*x1 = PROJ_ROUND (*x1) + 0.5;
*y1 = PROJ_ROUND (*y1) + 0.5;
*x2 = PROJ_ROUND (*x2) + 0.5;
*y2 = PROJ_ROUND (*y2) + 0.5;
}
static void
gimp_canvas_line_draw (GimpCanvasItem *item,
GimpDisplayShell *shell,
cairo_t *cr)
{
gdouble x1, y1;
gdouble x2, y2;
gimp_canvas_line_transform (item, shell, &x1, &y1, &x2, &y2);
cairo_move_to (cr, x1, y1);
cairo_line_to (cr, x2, y2);
_gimp_canvas_item_set_extents (item,
MIN (x1, x2) - 0.5,
MIN (y1, y2) - 0.5,
ABS (x2 - x1) + 1.0,
ABS (y2 - y1) + 1.0);
_gimp_canvas_item_stroke (item, shell, cr);
}
static GdkRegion *
gimp_canvas_line_get_extents (GimpCanvasItem *item,
GimpDisplayShell *shell)
{
return GIMP_CANVAS_ITEM_CLASS (parent_class)->get_extents (item, shell);
}
GimpCanvasItem *
gimp_canvas_line_new (gdouble x1,
gdouble y1,
gdouble x2,
gdouble y2)
{
return g_object_new (GIMP_TYPE_CANVAS_LINE,
"x1", x1,
"y1", y1,
"x2", x2,
"y2", y2,
NULL);
}
/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimpcanvasline.h
* 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/>.
*/
#ifndef __GIMP_CANVAS_LINE_H__
#define __GIMP_CANVAS_LINE_H__
#include "gimpcanvasitem.h"
#define GIMP_TYPE_CANVAS_LINE (gimp_canvas_line_get_type ())
#define GIMP_CANVAS_LINE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_CANVAS_LINE, GimpCanvasLine))
#define GIMP_CANVAS_LINE_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GIMP_TYPE_CANVAS_LINE, GimpCanvasLineClass))
#define GIMP_IS_CANVAS_LINE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_CANVAS_LINE))
#define GIMP_IS_CANVAS_LINE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GIMP_TYPE_CANVAS_LINE))
#define GIMP_CANVAS_LINE_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GIMP_TYPE_CANVAS_LINE, GimpCanvasLineClass))
typedef struct _GimpCanvasLine GimpCanvasLine;
typedef struct _GimpCanvasLineClass GimpCanvasLineClass;
struct _GimpCanvasLine
{
GimpCanvasItem parent_instance;
};
struct _GimpCanvasLineClass
{
GimpCanvasItemClass parent_class;
};
GType gimp_canvas_line_get_type (void) G_GNUC_CONST;
GimpCanvasItem * gimp_canvas_line_new (gdouble x1,
gdouble y1,
gdouble x2,
gdouble y2);
#endif /* __GIMP_CANVAS_LINE_H__ */
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