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Viewing changes to src/libgnomecanvas/gnome-canvas-polygon.c

  • Committer: Bazaar Package Importer
  • Author(s): Marc Gariepy, Marc Gariepy, Stephane Graber
  • Date: 2010-01-04 17:42:49 UTC
  • mfrom: (1.1.14 upstream)
  • Revision ID: james.westby@ubuntu.com-20100104174249-7bupatd9dtxyhvs4
Tags: 9.0-0ubuntu1
[Marc Gariepy]
* New upstream release (9.0).
* Remove cache.c from POTFILES to avoid FTBFS
* Remove unneeded rm in debian/rules (file no longer exists upstream)

[Stephane Graber]
* Bump Debian standards to 3.8.3
* Add patch system (dpatch)

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src/libgnomecanvas/gnome-canvas-polygon.c
1
 
/*
2
 
 * Copyright (C) 1997, 1998, 1999, 2000 Free Software Foundation
3
 
 * All rights reserved.
4
 
 *
5
 
 * This file is part of the Gnome Library.
6
 
 *
7
 
 * The Gnome Library is free software; you can redistribute it and/or
8
 
 * modify it under the terms of the GNU Library General Public License as
9
 
 * published by the Free Software Foundation; either version 2 of the
10
 
 * License, or (at your option) any later version.
11
 
 *
12
 
 * The Gnome Library is distributed in the hope that it will be useful,
13
 
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14
 
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15
 
 * Library General Public License for more details.
16
 
 *
17
 
 * You should have received a copy of the GNU Library General Public
18
 
 * License along with the Gnome Library; see the file COPYING.LIB.  If not,
19
 
 * write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20
 
 * Boston, MA 02111-1307, USA.
21
 
 */
22
 
/*
23
 
  @NOTATION@
24
 
 */
25
 
/* Polygon item type for GnomeCanvas widget
26
 
 *
27
 
 * GnomeCanvas is basically a port of the Tk toolkit's most excellent canvas widget.  Tk is
28
 
 * copyrighted by the Regents of the University of California, Sun Microsystems, and other parties.
29
 
 *
30
 
 * Author: Federico Mena <federico@nuclecu.unam.mx>
31
 
 *         Rusty Conover <rconover@bangtail.net>
32
 
 */
33
 
 
34
 
#include <config.h>
35
 
#include <math.h>
36
 
#include <string.h>
37
 
#include "libart_lgpl/art_vpath.h"
38
 
#include "libart_lgpl/art_svp.h"
39
 
#include "libart_lgpl/art_svp_vpath.h"
40
 
#include "libart_lgpl/art_svp_vpath_stroke.h"
41
 
#include "libgnomecanvas.h"
42
 
 
43
 
#include "gnome-canvas-shape.h"
44
 
 
45
 
 
46
 
#define NUM_STATIC_POINTS 256   /* Number of static points to use to avoid allocating arrays */
47
 
 
48
 
 
49
 
enum {
50
 
        PROP_0,
51
 
        PROP_POINTS
52
 
};
53
 
 
54
 
 
55
 
static void gnome_canvas_polygon_class_init (GnomeCanvasPolygonClass *class);
56
 
static void gnome_canvas_polygon_init       (GnomeCanvasPolygon      *poly);
57
 
static void gnome_canvas_polygon_destroy    (GtkObject               *object);
58
 
static void gnome_canvas_polygon_set_property (GObject              *object,
59
 
                                               guint                 param_id,
60
 
                                               const GValue         *value,
61
 
                                               GParamSpec           *pspec);
62
 
static void gnome_canvas_polygon_get_property (GObject              *object,
63
 
                                               guint                 param_id,
64
 
                                               GValue               *value,
65
 
                                               GParamSpec           *pspec);
66
 
 
67
 
static void gnome_canvas_polygon_update      (GnomeCanvasItem *item, double *affine, ArtSVP *clip_path, int flags);
68
 
 
69
 
static GnomeCanvasItemClass *parent_class;
70
 
 
71
 
GType
72
 
gnome_canvas_polygon_get_type (void)
73
 
{
74
 
        static GType polygon_type;
75
 
 
76
 
        if (!polygon_type) {
77
 
                static const GTypeInfo object_info = {
78
 
                        sizeof (GnomeCanvasPolygonClass),
79
 
                        (GBaseInitFunc) NULL,
80
 
                        (GBaseFinalizeFunc) NULL,
81
 
                        (GClassInitFunc) gnome_canvas_polygon_class_init,
82
 
                        (GClassFinalizeFunc) NULL,
83
 
                        NULL,                   /* class_data */
84
 
                        sizeof (GnomeCanvasPolygon),
85
 
                        0,                      /* n_preallocs */
86
 
                        (GInstanceInitFunc) gnome_canvas_polygon_init,
87
 
                        NULL                    /* value_table */
88
 
                };
89
 
 
90
 
                polygon_type = g_type_register_static (GNOME_TYPE_CANVAS_SHAPE, "GnomeCanvasPolygon",
91
 
                                                       &object_info, 0);
92
 
        }
93
 
 
94
 
        return polygon_type;
95
 
}
96
 
 
97
 
static void
98
 
gnome_canvas_polygon_class_init (GnomeCanvasPolygonClass *class)
99
 
{
100
 
        GObjectClass *gobject_class;
101
 
        GtkObjectClass *object_class;
102
 
        GnomeCanvasItemClass *item_class;
103
 
 
104
 
        gobject_class = (GObjectClass *) class;
105
 
        object_class = (GtkObjectClass *) class;
106
 
        item_class = (GnomeCanvasItemClass *) class;
107
 
 
108
 
        parent_class = g_type_class_peek_parent (class);
109
 
 
110
 
        gobject_class->set_property = gnome_canvas_polygon_set_property;
111
 
        gobject_class->get_property = gnome_canvas_polygon_get_property;
112
 
 
113
 
        g_object_class_install_property
114
 
                (gobject_class,
115
 
                 PROP_POINTS,
116
 
                 g_param_spec_boxed ("points", NULL, NULL,
117
 
                                     GNOME_TYPE_CANVAS_POINTS,
118
 
                                     (G_PARAM_READABLE | G_PARAM_WRITABLE)));
119
 
 
120
 
        object_class->destroy = gnome_canvas_polygon_destroy;
121
 
 
122
 
        item_class->update = gnome_canvas_polygon_update;
123
 
}
124
 
 
125
 
static void
126
 
gnome_canvas_polygon_init (GnomeCanvasPolygon *poly)
127
 
{
128
 
        poly->path_def = NULL;
129
 
}
130
 
 
131
 
static void
132
 
gnome_canvas_polygon_destroy (GtkObject *object)
133
 
{
134
 
        GnomeCanvasPolygon *poly;
135
 
 
136
 
        g_return_if_fail (object != NULL);
137
 
        g_return_if_fail (GNOME_IS_CANVAS_POLYGON (object));
138
 
 
139
 
        poly = GNOME_CANVAS_POLYGON (object);
140
 
 
141
 
        /* remember, destroy can be run multiple times! */
142
 
 
143
 
        if(poly->path_def)
144
 
                gnome_canvas_path_def_unref(poly->path_def);
145
 
 
146
 
        poly->path_def = NULL;
147
 
 
148
 
 
149
 
        if (GTK_OBJECT_CLASS (parent_class)->destroy)
150
 
                (* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
151
 
}
152
 
 
153
 
static void
154
 
set_points (GnomeCanvasPolygon *poly, GnomeCanvasPoints *points)
155
 
{
156
 
        int i;
157
 
 
158
 
 
159
 
        if (poly->path_def)
160
 
                gnome_canvas_path_def_unref(poly->path_def);
161
 
 
162
 
        if (!points) {
163
 
                poly->path_def = gnome_canvas_path_def_new();
164
 
                gnome_canvas_shape_set_path_def (GNOME_CANVAS_SHAPE (poly), poly->path_def);
165
 
                return;
166
 
        }
167
 
 
168
 
 
169
 
        /* Optomize the path def to the number of points */
170
 
        poly->path_def = gnome_canvas_path_def_new_sized(points->num_points+1);
171
 
 
172
 
#if 0
173
 
        /* No need for explicit duplicate, as closepaths does it for us (Lauris) */
174
 
        /* See if we need to duplicate the first point */
175
 
        duplicate = ((points->coords[0] != points->coords[2 * points->num_points - 2])
176
 
                     || (points->coords[1] != points->coords[2 * points->num_points - 1]));
177
 
#endif
178
 
 
179
 
        
180
 
        gnome_canvas_path_def_moveto (poly->path_def, points->coords[0], points->coords[1]);
181
 
        
182
 
        for (i = 1; i < points->num_points; i++) {
183
 
                gnome_canvas_path_def_lineto(poly->path_def, points->coords[i * 2], points->coords[(i * 2) + 1]);
184
 
        }
185
 
 
186
 
        gnome_canvas_path_def_closepath (poly->path_def);
187
 
 
188
 
        gnome_canvas_shape_set_path_def (GNOME_CANVAS_SHAPE (poly), poly->path_def);
189
 
}
190
 
 
191
 
 
192
 
static void
193
 
gnome_canvas_polygon_set_property (GObject              *object,
194
 
                                   guint                 param_id,
195
 
                                   const GValue         *value,
196
 
                                   GParamSpec           *pspec)
197
 
{
198
 
        GnomeCanvasItem *item;
199
 
        GnomeCanvasPolygon *poly;
200
 
        GnomeCanvasPoints *points;
201
 
 
202
 
        g_return_if_fail (object != NULL);
203
 
        g_return_if_fail (GNOME_IS_CANVAS_POLYGON (object));
204
 
 
205
 
        item = GNOME_CANVAS_ITEM (object);
206
 
        poly = GNOME_CANVAS_POLYGON (object);
207
 
 
208
 
        switch (param_id) {
209
 
        case PROP_POINTS:
210
 
                points = g_value_get_boxed (value);
211
 
 
212
 
                set_points (poly, points);
213
 
 
214
 
                gnome_canvas_item_request_update (item);
215
 
                break;
216
 
        default:
217
 
                G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
218
 
                break;
219
 
        }
220
 
}
221
 
 
222
 
 
223
 
static void
224
 
gnome_canvas_polygon_get_property (GObject              *object,
225
 
                                   guint                 param_id,
226
 
                                   GValue               *value,
227
 
                                   GParamSpec           *pspec)
228
 
{
229
 
        g_return_if_fail (object != NULL);
230
 
        g_return_if_fail (GNOME_IS_CANVAS_POLYGON (object));
231
 
 
232
 
        switch (param_id) {
233
 
        case PROP_POINTS:
234
 
                break;
235
 
        default:
236
 
                G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
237
 
                break;
238
 
        }
239
 
}
240
 
 
241
 
 
242
 
static void
243
 
gnome_canvas_polygon_update (GnomeCanvasItem *item, double *affine, ArtSVP *clip_path, int flags)
244
 
{
245
 
        /* Since the path has already been defined just pass the update up. */
246
 
 
247
 
        if (parent_class->update)
248
 
                (* parent_class->update) (item, affine, clip_path, flags);
249
 
}