2 spacing-loose-columns.cc -- implement loose column spacing.
4 source file of the GNU LilyPond music typesetter
6 (c) 2005 Han-Wen Nienhuys <hanwen@xs4all.nl>
11 #include "paper-column.hh"
12 #include "column-x-positions.hh"
13 #include "pointer-group-interface.hh"
14 #include "staff-spacing.hh"
15 #include "note-spacing.hh"
16 #include "spacing-spanner.hh"
20 /* Find the loose columns in POSNS, and drape them around the columns
21 specified in BETWEEN-COLS. */
23 set_loose_columns (System *which, Column_x_positions const *posns)
25 int loose_col_count = posns->loose_cols_.size ();
29 Real default_padding = 1.0;
30 for (int i = 0; i < loose_col_count; i++)
33 Item *loose = dynamic_cast<Item *> (posns->loose_cols_[i]);
34 Paper_column *col = dynamic_cast<Paper_column *> (loose);
36 if (col->get_system ())
42 Link_array<Item> clique;
45 SCM between = loose->get_object ("between-cols");
46 if (!scm_is_pair (between))
49 Item *le = dynamic_cast<Item *> (unsmob_grob (scm_car (between)));
50 Item *re = dynamic_cast<Item *> (unsmob_grob (scm_cdr (between)));
57 left = le->get_column ();
58 if (!left->get_system ())
59 left = left->find_prebroken_piece (RIGHT);
67 loose = right = re->get_column ();
70 if (!right->get_system ())
71 right = right->find_prebroken_piece (LEFT);
75 Grob *common = right->common_refpoint (left, X_AXIS);
76 Item *finished_right_column = clique.top();
78 for (int j = clique.size() - 2; j > 0; j--)
81 Real total_space = 0.0;
82 Real total_fixed = 0.0;
84 extract_grob_set (col, "spacing-wishes", wishes);
85 for (int i = 0; i < wishes.size (); i++)
87 Grob *spacing = wishes[i];
91 if (Staff_spacing::has_interface (spacing))
93 Staff_spacing::get_spacing_params (spacing, &space, &fixed);
95 else if (Note_spacing::has_interface (spacing))
97 Spacing_options options;
100 fixed = robust_relative_extent (col, col, X_AXIS)[RIGHT];
102 Moment dt = Paper_column::when_mom (right) - Paper_column::when_mom (col);
104 space = options.get_duration_space (dt, &expand);
105 Note_spacing::get_spacing (spacing, right, space, options.increment_,
115 total_space += space;
116 total_fixed += fixed;
119 Real distance_to_next = 0.0;
120 Real right_point = 0.0;
123 total_space /= count;
124 total_fixed /= count;
126 distance_to_next = total_space;
128 = finished_right_column->relative_coordinate (common, X_AXIS);
132 Interval my_extent = robust_relative_extent (col, col, X_AXIS);
133 distance_to_next = my_extent[RIGHT] + default_padding;
134 right_point = robust_relative_extent (finished_right_column, common, X_AXIS)[LEFT];
137 Real my_offset = right_point - distance_to_next;
139 col->system_ = which;
140 col->translate_axis (my_offset - col->relative_coordinate (common, X_AXIS), X_AXIS);
142 finished_right_column = col;