52ccc29e18fd9f8a878c31a27b0fb94dbc1c2997
1 #define INKSCAPE_LPE_RULER_CPP
3 /** \file
4 * LPE <ruler> implementation, see lpe-ruler.cpp.
5 */
7 /*
8 * Authors:
9 * Maximilian Albert
10 *
11 * Copyright (C) Maximilian Albert 2008 <maximilian.albert@gmail.com>
12 *
13 * Released under GNU GPL, read the file 'COPYING' for more information
14 */
16 #include "live_effects/lpe-ruler.h"
17 #include <2geom/piecewise.h>
18 #include <2geom/sbasis-geometric.h>
19 #include "inkscape.h"
20 #include "desktop.h"
22 namespace Inkscape {
23 namespace LivePathEffect {
25 static const Util::EnumData<MarkDirType> MarkDirData[] = {
26 {MARKDIR_LEFT , N_("Left"), "left"},
27 {MARKDIR_RIGHT , N_("Right"), "right"},
28 {MARKDIR_BOTH , N_("Both"), "both"},
29 };
30 static const Util::EnumDataConverter<MarkDirType> MarkDirTypeConverter(MarkDirData, sizeof(MarkDirData)/sizeof(*MarkDirData));
32 static const Util::EnumData<BorderMarkType> BorderMarkData[] = {
33 {BORDERMARK_NONE , N_("None"), "none"},
34 {BORDERMARK_START , N_("Start"), "start"},
35 {BORDERMARK_END , N_("End"), "end"},
36 {BORDERMARK_BOTH , N_("Both"), "both"},
37 };
38 static const Util::EnumDataConverter<BorderMarkType> BorderMarkTypeConverter(BorderMarkData, sizeof(BorderMarkData)/sizeof(*BorderMarkData));
40 LPERuler::LPERuler(LivePathEffectObject *lpeobject) :
41 Effect(lpeobject),
42 mark_distance(_("Mark distance"), _("Distance between successive ruler marks"), "mark_distance", &wr, this, 20.0),
43 mark_length(_("Major length"), _("Length of major ruler marks"), "mark_length", &wr, this, 14.0),
44 minor_mark_length(_("Minor length"), _("Length of minor ruler marks"), "minor_mark_length", &wr, this, 7.0),
45 major_mark_steps(_("Major steps"), _("Draw a major mark every ... steps"), "major_mark_steps", &wr, this, 5),
46 shift(_("Shift marks by"), _("Shift marks by this many steps"), "shift", &wr, this, 0),
47 mark_dir(_("Mark direction"), _("Direction of marks (when viewing along the path from start to end)"), "mark_dir", MarkDirTypeConverter, &wr, this, MARKDIR_LEFT),
48 offset(_("Offset"), _("Offset of first mark"), "offset", &wr, this, 0.0),
49 border_marks(_("Border marks"), _("Choose whether to draw marks at the beginning and end of the path"), "border_marks", BorderMarkTypeConverter, &wr, this, BORDERMARK_BOTH)
50 {
51 registerParameter(dynamic_cast<Parameter *>(&mark_distance));
52 registerParameter(dynamic_cast<Parameter *>(&mark_length));
53 registerParameter(dynamic_cast<Parameter *>(&minor_mark_length));
54 registerParameter(dynamic_cast<Parameter *>(&major_mark_steps));
55 registerParameter(dynamic_cast<Parameter *>(&shift));
56 registerParameter(dynamic_cast<Parameter *>(&offset));
57 registerParameter(dynamic_cast<Parameter *>(&mark_dir));
58 registerParameter(dynamic_cast<Parameter *>(&border_marks));
60 major_mark_steps.param_make_integer();
61 major_mark_steps.param_set_range(1, 1000);
62 shift.param_make_integer();
64 mark_length.param_set_increments(1.0, 10.0);
65 minor_mark_length.param_set_increments(1.0, 10.0);
66 offset.param_set_increments(1.0, 10.0);
67 }
69 LPERuler::~LPERuler()
70 {
72 }
74 Geom::Point LPERuler::n_major;
75 Geom::Point LPERuler::n_minor;
77 Geom::Piecewise<Geom::D2<Geom::SBasis> >
78 LPERuler::ruler_mark(Geom::Point const &A, Geom::Point const &n, MarkType const &marktype)
79 {
80 using namespace Geom;
82 n_major = mark_length * n;
83 n_minor = minor_mark_length * n;
85 Point C, D;
86 switch (marktype) {
87 case MARK_MAJOR:
88 C = A;
89 D = A + n_major;
90 if (mark_dir == MARKDIR_BOTH)
91 C -= n_major;
92 break;
93 case MARK_MINOR:
94 C = A;
95 D = A + n_minor;
96 if (mark_dir == MARKDIR_BOTH)
97 C -= n_minor;
98 break;
99 default:
100 // do nothing
101 break;
102 }
104 Piecewise<D2<SBasis> > seg(D2<SBasis>(Linear(C[X], D[X]), Linear(C[Y], D[Y])));
105 return seg;
106 }
108 Geom::Piecewise<Geom::D2<Geom::SBasis> >
109 LPERuler::doEffect_pwd2 (Geom::Piecewise<Geom::D2<Geom::SBasis> > const & pwd2_in)
110 {
111 using namespace Geom;
113 Piecewise<D2<SBasis> > pwd2_arclength = arc_length_parametrization(pwd2_in);
114 Point A(pwd2_arclength.firstValue());
115 Point B(pwd2_arclength.lastValue());
116 double path_length = Geom::length(pwd2_arclength);
118 Piecewise<D2<SBasis> > n = -rot90(unitVector(derivative(pwd2_arclength)));
119 Piecewise<D2<SBasis> >output(pwd2_arclength);
121 if (mark_dir == MARKDIR_RIGHT) {
122 n *= -1.0;
123 }
125 int j = 0;
126 const int mminterval = static_cast<int>(major_mark_steps);
127 const int j_shift = static_cast<int>(shift) % mminterval;
129 /* draw the ruler */
130 if ((border_marks == BORDERMARK_START || border_marks == BORDERMARK_BOTH) && (offset != 0.0 || j_shift != 0))
131 output.concat (ruler_mark(A, n.firstValue(), MARK_MAJOR));
132 for (double t = offset; t < path_length; t += mark_distance, ++j) {
133 if ((j % mminterval) == j_shift) {
134 output.concat (ruler_mark(pwd2_arclength(t), n(t), MARK_MAJOR));
135 } else {
136 output.concat (ruler_mark(pwd2_arclength(t), n(t), MARK_MINOR));
137 }
138 }
139 if (border_marks == BORDERMARK_END || border_marks == BORDERMARK_BOTH)
140 output.concat (ruler_mark(B, n.lastValue(), MARK_MAJOR));
142 return output;
143 }
145 } //namespace LivePathEffect
146 } /* namespace Inkscape */
148 /*
149 Local Variables:
150 mode:c++
151 c-file-style:"stroustrup"
152 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
153 indent-tabs-mode:nil
154 fill-column:99
155 End:
156 */
157 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :