2 This file is part of LilyPond, the GNU music typesetter.
4 Copyright (C) 2002--2012 Juergen Reuter <reuter@ipd.uka.de>
5 Han-Wen Nienhuys <hanwen@xs4all.nl>
7 LilyPond is free software: you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation, either version 3 of the License, or
10 (at your option) any later version.
12 LilyPond is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
22 #include "international.hh"
25 #include "output-def.hh"
27 #include "pointer-group-interface.hh"
29 #include "staff-symbol-referencer.hh"
33 TODO: Add support for cubic spline segments.
36 brew_cluster_piece (Grob *me, vector<Offset> bottom_points, vector<Offset> top_points)
38 Real blotdiameter = Staff_symbol_referencer::staff_space (me) / 2;
40 Real padding = robust_scm2double (me->get_property ("padding"), 0.0);
42 Offset vpadding = Offset (0, padding);
43 Offset hpadding = Offset (0.5 * blotdiameter, 0);
44 Offset hvpadding = 0.5 * hpadding + vpadding;
46 SCM shape_scm = me->get_property ("style");
49 if (scm_is_symbol (shape_scm))
50 shape = ly_symbol2string (shape_scm);
53 programming_error ("#'style should be symbol.");
59 vector<Offset> points;
61 int size = bottom_points.size ();
62 if (shape == "leftsided-stairs")
64 for (int i = 0; i < size - 1; i++)
67 box.add_point (bottom_points[i] - hvpadding);
68 box.add_point (Offset (top_points[i + 1][X_AXIS],
69 top_points[i][Y_AXIS]) + hvpadding);
70 out.add_stencil (Lookup::round_filled_box (box, blotdiameter));
73 else if (shape == "rightsided-stairs")
75 for (int i = 0; i < size - 1; i++)
78 box.add_point (Offset (bottom_points[i][X_AXIS],
79 bottom_points[i + 1][Y_AXIS]) - hvpadding);
80 box.add_point (top_points[i + 1] + hvpadding);
81 out.add_stencil (Lookup::round_filled_box (box, blotdiameter));
84 else if (shape == "centered-stairs")
86 Real left_xmid = bottom_points[0][X_AXIS];
87 for (int i = 0; i < size - 1; i++)
90 = 0.5 * (bottom_points[i][X_AXIS] + bottom_points[i + 1][X_AXIS]);
92 box.add_point (Offset (left_xmid, bottom_points[i][Y_AXIS])
94 box.add_point (Offset (right_xmid, top_points[i][Y_AXIS])
96 out.add_stencil (Lookup::round_filled_box (box, blotdiameter));
97 left_xmid = right_xmid;
99 Real right_xmid = bottom_points[size - 1][X_AXIS];
101 box.add_point (Offset (left_xmid, bottom_points[size - 1][Y_AXIS])
103 box.add_point (Offset (right_xmid, top_points[size - 1][Y_AXIS])
105 out.add_stencil (Lookup::round_filled_box (box, blotdiameter));
107 else if (shape == "ramp")
109 points.push_back (bottom_points[0] - vpadding + hpadding);
110 for (int i = 1; i < size - 1; i++)
111 points.push_back (bottom_points[i] - vpadding);
112 points.push_back (bottom_points[size - 1] - vpadding - hpadding);
113 points.push_back (top_points[size - 1] + vpadding - hpadding);
114 for (int i = size - 2; i > 0; i--)
115 points.push_back (top_points[i] + vpadding);
116 points.push_back (top_points[0] + vpadding + hpadding);
117 out.add_stencil (Lookup::round_filled_polygon (points, blotdiameter));
120 me->warning (_f ("unknown cluster style `%s'", shape.c_str ()));
124 MAKE_SCHEME_CALLBACK (Cluster, calc_cross_staff, 1);
126 Cluster::calc_cross_staff (SCM smob)
128 Grob *me = unsmob_grob (smob);
130 extract_grob_set (me, "columns", cols);
131 Grob *commony = common_refpoint_of_array (cols, me, Y_AXIS);
133 return scm_from_bool (commony != me->get_parent (Y_AXIS));
136 MAKE_SCHEME_CALLBACK (Cluster, print, 1);
138 Cluster::print (SCM smob)
140 Grob *me = unsmob_grob (smob);
142 Spanner *spanner = dynamic_cast<Spanner *> (me);
145 me->programming_error ("Cluster::print (): not a spanner");
149 Item *left_bound = spanner->get_bound (LEFT);
150 Item *right_bound = spanner->get_bound (RIGHT);
152 Grob *commonx = left_bound->common_refpoint (right_bound, X_AXIS);
154 vector<Grob *> const &cols = extract_grob_array (me, "columns");
157 me->warning (_ ("junking empty cluster"));
163 commonx = common_refpoint_of_array (cols, commonx, X_AXIS);
164 Grob *commony = common_refpoint_of_array (cols, me, Y_AXIS);
165 vector<Offset> bottom_points;
166 vector<Offset> top_points;
168 Real left_coord = left_bound->relative_coordinate (commonx, X_AXIS);
171 TODO: should we move the cluster a little to the right to be in
172 line with the center of the note heads?
175 for (vsize i = 0; i < cols.size (); i++)
179 Interval yext = col->extent (commony, Y_AXIS);
181 Real x = col->relative_coordinate (commonx, X_AXIS) - left_coord;
182 bottom_points.push_back (Offset (x, yext[DOWN]));
183 top_points.push_back (Offset (x, yext[UP]));
187 Across a line break we anticipate on the next pitches.
189 if (Spanner *next = spanner->broken_neighbor (RIGHT))
191 extract_grob_set (next, "columns", next_cols);
192 if (next_cols.size () > 0)
194 Grob *next_commony = common_refpoint_of_array (next_cols, next, Y_AXIS);
195 Grob *col = next_cols[0];
197 Interval v = col->extent (next_commony, Y_AXIS);
198 Real x = right_bound->relative_coordinate (commonx, X_AXIS) - left_coord;
200 bottom_points.push_back (Offset (x, v[DOWN]));
201 top_points.push_back (Offset (x, v[UP]));
205 Stencil out = brew_cluster_piece (me, bottom_points, top_points);
206 out.translate_axis (- me->relative_coordinate (commony, Y_AXIS), Y_AXIS);
207 return out.smobbed_copy ();
210 ADD_INTERFACE (Cluster,
211 "A graphically drawn musical cluster.\n"
213 "@code{padding} adds to the vertical extent of the shape (top"
216 "The property @code{style} controls the shape of cluster"
217 " segments. Valid values include @code{leftsided-stairs},"
218 " @code{rightsided-stairs}, @code{centered-stairs}, and"
227 struct Cluster_beacon
230 DECLARE_SCHEME_CALLBACK (height, (SCM));
231 DECLARE_GROB_INTERFACE ();
234 MAKE_SCHEME_CALLBACK (Cluster_beacon, height, 1);
236 Cluster_beacon::height (SCM g)
238 Grob *me = unsmob_grob (g);
239 Interval v = robust_scm2interval (me->get_property ("positions"),
241 return ly_interval2scm (Staff_symbol_referencer::staff_space (me) * 0.5 * v);
244 ADD_INTERFACE (Cluster_beacon,
245 "A place holder for the cluster spanner to determine the"
246 " vertical extents of a cluster spanner at this"