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/*
* Copyright (C) 1997, 1998, 1999, 2000 Free Software Foundation
* All rights reserved.
*
* This file is part of the Gnome Library.
*
* The Gnome Library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* The Gnome Library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with the Gnome Library; see the file COPYING.LIB. If not,
* write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/*
@NOTATION@
*/
/* Polygon item type for GnomeCanvas widget
*
* GnomeCanvas is basically a port of the Tk toolkit's most excellent canvas widget. Tk is
* copyrighted by the Regents of the University of California, Sun Microsystems, and other parties.
*
* Author: Federico Mena <federico@nuclecu.unam.mx>
* Rusty Conover <rconover@bangtail.net>
*/
#include <config.h>
#include <math.h>
#include <string.h>
#include <libart_lgpl/art_vpath.h>
#include <libart_lgpl/art_svp.h>
#include <libart_lgpl/art_svp_vpath.h>
#include <libart_lgpl/art_svp_vpath_stroke.h>
#include "libgnomecanvas.h"
#include "gnome-canvas-shape.h"
#define NUM_STATIC_POINTS 256 /* Number of static points to use to avoid allocating arrays */
enum {
PROP_0,
PROP_POINTS
};
static void gnome_canvas_polygon_class_init (GnomeCanvasPolygonClass *class);
static void gnome_canvas_polygon_init (GnomeCanvasPolygon *poly);
static void gnome_canvas_polygon_destroy (GtkObject *object);
static void gnome_canvas_polygon_set_property (GObject *object,
guint param_id,
const GValue *value,
GParamSpec *pspec);
static void gnome_canvas_polygon_get_property (GObject *object,
guint param_id,
GValue *value,
GParamSpec *pspec);
static void gnome_canvas_polygon_update (GnomeCanvasItem *item, gdouble *affine, ArtSVP *clip_path, gint flags);
static GnomeCanvasItemClass *parent_class;
GType
gnome_canvas_polygon_get_type (void)
{
static GType polygon_type;
if (!polygon_type) {
const GTypeInfo object_info = {
sizeof (GnomeCanvasPolygonClass),
(GBaseInitFunc) NULL,
(GBaseFinalizeFunc) NULL,
(GClassInitFunc) gnome_canvas_polygon_class_init,
(GClassFinalizeFunc) NULL,
NULL, /* class_data */
sizeof (GnomeCanvasPolygon),
0, /* n_preallocs */
(GInstanceInitFunc) gnome_canvas_polygon_init,
NULL /* value_table */
};
polygon_type = g_type_register_static (GNOME_TYPE_CANVAS_SHAPE, "GnomeCanvasPolygon",
&object_info, 0);
}
return polygon_type;
}
static void
gnome_canvas_polygon_class_init (GnomeCanvasPolygonClass *class)
{
GObjectClass *gobject_class;
GtkObjectClass *object_class;
GnomeCanvasItemClass *item_class;
gobject_class = (GObjectClass *) class;
object_class = (GtkObjectClass *) class;
item_class = (GnomeCanvasItemClass *) class;
parent_class = g_type_class_peek_parent (class);
gobject_class->set_property = gnome_canvas_polygon_set_property;
gobject_class->get_property = gnome_canvas_polygon_get_property;
g_object_class_install_property
(gobject_class,
PROP_POINTS,
g_param_spec_boxed ("points", NULL, NULL,
GNOME_TYPE_CANVAS_POINTS,
(G_PARAM_READABLE | G_PARAM_WRITABLE)));
object_class->destroy = gnome_canvas_polygon_destroy;
item_class->update = gnome_canvas_polygon_update;
}
static void
gnome_canvas_polygon_init (GnomeCanvasPolygon *poly)
{
poly->path_def = NULL;
}
static void
gnome_canvas_polygon_destroy (GtkObject *object)
{
GnomeCanvasPolygon *poly;
g_return_if_fail (object != NULL);
g_return_if_fail (GNOME_IS_CANVAS_POLYGON (object));
poly = GNOME_CANVAS_POLYGON (object);
/* remember, destroy can be run multiple times! */
if (poly->path_def)
gnome_canvas_path_def_unref (poly->path_def);
poly->path_def = NULL;
if (GTK_OBJECT_CLASS (parent_class)->destroy)
(* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
}
static void
set_points (GnomeCanvasPolygon *poly, GnomeCanvasPoints *points)
{
gint i;
if (poly->path_def)
gnome_canvas_path_def_unref (poly->path_def);
if (!points) {
poly->path_def = gnome_canvas_path_def_new ();
gnome_canvas_shape_set_path_def (GNOME_CANVAS_SHAPE (poly), poly->path_def);
return;
}
/* Optomize the path def to the number of points */
poly->path_def = gnome_canvas_path_def_new_sized (points->num_points+1);
#if 0
/* No need for explicit duplicate, as closepaths does it for us (Lauris) */
/* See if we need to duplicate the first point */
duplicate = ((points->coords[0] != points->coords[2 * points->num_points - 2])
|| (points->coords[1] != points->coords[2 * points->num_points - 1]));
#endif
gnome_canvas_path_def_moveto (poly->path_def, points->coords[0], points->coords[1]);
for (i = 1; i < points->num_points; i++) {
gnome_canvas_path_def_lineto (poly->path_def, points->coords[i * 2], points->coords[(i * 2) + 1]);
}
gnome_canvas_path_def_closepath (poly->path_def);
gnome_canvas_shape_set_path_def (GNOME_CANVAS_SHAPE (poly), poly->path_def);
}
static void
gnome_canvas_polygon_set_property (GObject *object,
guint param_id,
const GValue *value,
GParamSpec *pspec)
{
GnomeCanvasItem *item;
GnomeCanvasPolygon *poly;
GnomeCanvasPoints *points;
g_return_if_fail (object != NULL);
g_return_if_fail (GNOME_IS_CANVAS_POLYGON (object));
item = GNOME_CANVAS_ITEM (object);
poly = GNOME_CANVAS_POLYGON (object);
switch (param_id) {
case PROP_POINTS:
points = g_value_get_boxed (value);
set_points (poly, points);
gnome_canvas_item_request_update (item);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
break;
}
}
static void
gnome_canvas_polygon_get_property (GObject *object,
guint param_id,
GValue *value,
GParamSpec *pspec)
{
g_return_if_fail (object != NULL);
g_return_if_fail (GNOME_IS_CANVAS_POLYGON (object));
switch (param_id) {
case PROP_POINTS:
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
break;
}
}
static void
gnome_canvas_polygon_update (GnomeCanvasItem *item, gdouble *affine, ArtSVP *clip_path, gint flags)
{
/* Since the path has already been defined just pass the update up. */
if (parent_class->update)
(* parent_class->update) (item, affine, clip_path, flags);
}
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