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>
10 #include "paper-column.hh"
11 #include "column-x-positions.hh"
12 #include "pointer-group-interface.hh"
13 #include "staff-spacing.hh"
14 #include "note-spacing.hh"
15 #include "spacing-spanner.hh"
19 /* Find the loose columns in POSNS, and drape them around the columns
20 specified in BETWEEN-COLS. */
22 set_loose_columns (System *which, Column_x_positions const *posns)
24 int loose_col_count = posns->loose_cols_.size ();
28 Real default_padding = 1.0;
29 for (int i = 0; i < loose_col_count; i++)
32 Item *loose = dynamic_cast<Item *> (posns->loose_cols_[i]);
33 Paper_column *col = dynamic_cast<Paper_column *> (loose);
35 if (col->get_system ())
41 Link_array<Item> clique;
44 SCM between = loose->get_object ("between-cols");
45 if (!scm_is_pair (between))
48 Item *le = dynamic_cast<Item *> (unsmob_grob (scm_car (between)));
49 Item *re = dynamic_cast<Item *> (unsmob_grob (scm_cdr (between)));
56 left = le->get_column ();
57 if (!left->get_system ())
58 left = left->find_prebroken_piece (RIGHT);
66 loose = right = re->get_column ();
69 if (!right->get_system ())
70 right = right->find_prebroken_piece (LEFT);
74 Grob *common = right->common_refpoint (left, X_AXIS);
75 Item *finished_right_column = clique.top ();
77 for (int j = clique.size () - 2; j > 0; j--)
80 Real total_space = 0.0;
81 Real total_fixed = 0.0;
83 extract_grob_set (col, "spacing-wishes", wishes);
84 for (int i = 0; i < wishes.size (); i++)
86 Grob *spacing = wishes[i];
90 if (Staff_spacing::has_interface (spacing))
91 Staff_spacing::get_spacing_params (spacing, &space, &fixed);
92 else if (Note_spacing::has_interface (spacing))
94 Spacing_options options;
97 fixed = robust_relative_extent (col, col, X_AXIS)[RIGHT];
99 Moment dt = Paper_column::when_mom (right) - Paper_column::when_mom (col);
101 space = options.get_duration_space (dt, &expand);
102 Note_spacing::get_spacing (spacing, right, space, options.increment_,
110 total_space += space;
111 total_fixed += fixed;
114 Real distance_to_next = 0.0;
115 Real right_point = 0.0;
118 total_space /= count;
119 total_fixed /= count;
121 distance_to_next = total_space;
123 = finished_right_column->relative_coordinate (common, X_AXIS);
127 Interval my_extent = robust_relative_extent (col, col, X_AXIS);
128 distance_to_next = my_extent[RIGHT] + default_padding;
129 right_point = robust_relative_extent (finished_right_column, common, X_AXIS)[LEFT];
132 Real my_offset = right_point - distance_to_next;
134 col->system_ = which;
135 col->translate_axis (my_offset - col->relative_coordinate (common, X_AXIS), X_AXIS);
137 finished_right_column = col;