1 /**
2 * \file guide-snapper.cpp
3 * \brief Snapping things to guides.
4 *
5 * Authors:
6 * Lauris Kaplinski <lauris@kaplinski.com>
7 * Frank Felfe <innerspace@iname.com>
8 * Carl Hetherington <inkscape@carlh.net>
9 *
10 * Copyright (C) 1999-2002 Authors
11 *
12 * Released under GNU GPL, read the file 'COPYING' for more information
13 */
15 #include "libnr/nr-values.h"
16 #include "libnr/nr-point-fns.h"
17 #include "sp-namedview.h"
18 #include "sp-guide.h"
20 Inkscape::GuideSnapper::GuideSnapper(SPNamedView const *nv, NR::Coord const d) : LineSnapper(nv, d)
21 {
23 }
25 Inkscape::GuideSnapper::LineList Inkscape::GuideSnapper::_getSnapLines(NR::Point const &p) const
26 {
27 LineList s;
29 if ( NULL == _named_view || ThisSnapperMightSnap() == false) {
30 return s;
31 }
33 for (GSList const *l = _named_view->guides; l != NULL; l = l->next) {
34 SPGuide const *g = SP_GUIDE(l->data);
36 /* We assume here that guides are horizontal or vertical */
37 if (g->normal == component_vectors[NR::X]) {
38 s.push_back(std::make_pair(NR::X, g->position));
39 } else {
40 s.push_back(std::make_pair(NR::Y, g->position));
41 }
42 }
44 return s;
45 }
47 /**
48 * \return true if this Snapper will snap at least one kind of point.
49 */
50 bool Inkscape::GuideSnapper::ThisSnapperMightSnap() const
51 {
52 return _named_view == NULL ? false : (_enabled && _snap_to != 0 && _named_view->showguides);
53 }
55 /*
56 Local Variables:
57 mode:c++
58 c-file-style:"stroustrup"
59 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
60 indent-tabs-mode:nil
61 fill-column:99
62 End:
63 */
64 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :