1 #define __SP_CANVAS_ACETATE_C__
3 /*
4 * Infinite invisible canvas item
5 *
6 * Author:
7 * Federico Mena <federico@nuclecu.unam.mx>
8 * Raph Levien <raph@acm.org>
9 * Lauris Kaplinski <lauris@kaplinski.com>
10 *
11 * Copyright (C) 1998-1999 The Free Software Foundation
12 * Copyright (C) 2002 Lauris Kaplinski
13 *
14 * Released under GNU GPL, read the file 'COPYING' for more information
15 */
17 #include "display-forward.h"
18 #include "gnome-canvas-acetate.h"
20 static void sp_canvas_acetate_class_init (SPCanvasAcetateClass *klass);
21 static void sp_canvas_acetate_init (SPCanvasAcetate *acetate);
22 static void sp_canvas_acetate_destroy (GtkObject *object);
24 static void sp_canvas_acetate_update (SPCanvasItem *item, NR::Matrix const &affine, unsigned int flags);
25 static double sp_canvas_acetate_point (SPCanvasItem *item, NR::Point p, SPCanvasItem **actual_item);
27 static SPCanvasItemClass *parent_class;
29 GtkType
30 sp_canvas_acetate_get_type (void)
31 {
32 static GtkType acetate_type = 0;
33 if (!acetate_type) {
34 GtkTypeInfo acetate_info = {
35 "SPCanvasAcetate",
36 sizeof (SPCanvasAcetate),
37 sizeof (SPCanvasAcetateClass),
38 (GtkClassInitFunc) sp_canvas_acetate_class_init,
39 (GtkObjectInitFunc) sp_canvas_acetate_init,
40 NULL, NULL, NULL
41 };
42 acetate_type = gtk_type_unique (sp_canvas_item_get_type (), &acetate_info);
43 }
44 return acetate_type;
45 }
47 static void
48 sp_canvas_acetate_class_init (SPCanvasAcetateClass *klass)
49 {
50 GtkObjectClass *object_class;
51 SPCanvasItemClass *item_class;
53 object_class = (GtkObjectClass *) klass;
54 item_class = (SPCanvasItemClass *) klass;
56 parent_class = (SPCanvasItemClass*)gtk_type_class (sp_canvas_item_get_type ());
58 object_class->destroy = sp_canvas_acetate_destroy;
60 item_class->update = sp_canvas_acetate_update;
61 item_class->point = sp_canvas_acetate_point;
62 }
64 static void
65 sp_canvas_acetate_init (SPCanvasAcetate *acetate)
66 {
67 /* Nothing here */
68 }
70 static void
71 sp_canvas_acetate_destroy (GtkObject *object)
72 {
73 SPCanvasAcetate *acetate;
75 g_return_if_fail (object != NULL);
76 g_return_if_fail (GNOME_IS_CANVAS_ACETATE (object));
78 acetate = SP_CANVAS_ACETATE (object);
80 if (GTK_OBJECT_CLASS (parent_class)->destroy)
81 (* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
82 }
84 static void
85 sp_canvas_acetate_update (SPCanvasItem *item, NR::Matrix const &affine, unsigned int flags)
86 {
87 item->x1 = -G_MAXINT;
88 item->y1 = -G_MAXINT;
89 item->x2 = G_MAXINT;
90 item->y2 = G_MAXINT;
91 }
93 static double
94 sp_canvas_acetate_point (SPCanvasItem *item, NR::Point p, SPCanvasItem **actual_item)
95 {
96 *actual_item = item;
98 return 0.0;
99 }