aboutsummaryrefslogtreecommitdiffstats
path: root/libgnomecanvas/gnome-canvas-polygon.c
diff options
context:
space:
mode:
Diffstat (limited to 'libgnomecanvas/gnome-canvas-polygon.c')
-rw-r--r--libgnomecanvas/gnome-canvas-polygon.c246
1 files changed, 246 insertions, 0 deletions
diff --git a/libgnomecanvas/gnome-canvas-polygon.c b/libgnomecanvas/gnome-canvas-polygon.c
new file mode 100644
index 0000000000..53c7965a88
--- /dev/null
+++ b/libgnomecanvas/gnome-canvas-polygon.c
@@ -0,0 +1,246 @@
+/*
+ * 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, double *affine, ArtSVP *clip_path, int 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)
+{
+ int 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, double *affine, ArtSVP *clip_path, int 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);
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-02 15:48:48 +0800