1 // -*- C++ -*-
2
3 /*
4 * Gnome Chemistry Utils
5 * gccv/path.cc
6 *
7 * Copyright (C) 2009-2010 Jean Bréfort <jean.brefort@normalesup.org>
8 *
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License as
11 * published by the Free Software Foundation; either version 3 of the
12 * License, or (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
22 * USA
23 */
24
25 #include "config.h"
26 #include "path.h"
27
28 namespace gccv {
29
Path(Canvas * canvas,GOPath * path)30 Path::Path (Canvas *canvas, GOPath *path):
31 FillItem (canvas),
32 m_Path (path)
33 {
34 }
35
Path(Group * parent,GOPath * path,ItemClient * client)36 Path::Path (Group *parent, GOPath *path, ItemClient *client):
37 FillItem (parent, client),
38 m_Path (path)
39 {
40 }
41
~Path()42 Path::~Path ()
43 {
44 go_path_free (m_Path);
45 }
46
Distance(double x,double y,Item ** item) const47 double Path::Distance (double x, double y, Item **item) const
48 {
49 // use cairo_in_fill to detect if the point is inside
50 // size for the surface is probably unimportant
51 if (item)
52 *item = const_cast <Path *> (this);
53 cairo_surface_t *surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, 1, 1);
54 cairo_t *cr = cairo_create (surface);
55 cairo_surface_destroy (surface);
56 cairo_set_line_width (cr, GetLineWidth ());
57 go_path_to_cairo (m_Path, GO_PATH_DIRECTION_FORWARD, cr);
58 // FIXME, take colors into account
59 if (cairo_in_fill (cr, x, y)) {
60 cairo_destroy (cr);
61 return 0.;
62 }
63 if (cairo_in_stroke (cr, x, y)) {
64 cairo_destroy (cr);
65 return 0.;
66 }
67 cairo_destroy (cr);
68 return G_MAXDOUBLE; // FIXME
69 }
70
Draw(cairo_t * cr,G_GNUC_UNUSED bool is_vector) const71 void Path::Draw (cairo_t *cr, G_GNUC_UNUSED bool is_vector) const
72 {
73 GOColor fill_color = GetFillColor (), line_color = GetEffectiveLineColor ();
74 go_path_to_cairo (m_Path, GO_PATH_DIRECTION_FORWARD, cr);
75 if (fill_color != 0) {
76 cairo_set_source_rgba (cr, GO_COLOR_TO_CAIRO (fill_color));
77 if (line_color != 0)
78 cairo_fill_preserve (cr);
79 else
80 cairo_fill (cr);
81 }
82 if (ApplyLine (cr))
83 cairo_stroke (cr);
84 cairo_restore (cr);
85 }
86
UpdateBounds()87 void Path::UpdateBounds ()
88 {
89 cairo_surface_t *surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, 1, 1);
90 cairo_t *cr = cairo_create (surface);
91 cairo_surface_destroy (surface);
92 cairo_set_line_width (cr, GetLineWidth ());
93 go_path_to_cairo (m_Path, GO_PATH_DIRECTION_FORWARD, cr);
94 cairo_stroke_extents (cr, &m_x0, &m_y0, &m_x1, &m_y1);
95 cairo_destroy (cr);
96 Item::UpdateBounds ();
97 }
98
99 } // namespace gccv
100