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"
16 /* Find the loose columns in POSNS, and drape them around the columns
17 specified in BETWEEN-COLS. */
19 set_loose_columns (System *which, Column_x_positions const *posns)
21 int loose_col_count = posns->loose_cols_.size ();
25 Real default_padding = 1.0;
26 for (int i = 0; i < loose_col_count; i++)
29 Item *loose = dynamic_cast<Item *> (posns->loose_cols_[i]);
30 Paper_column *col = dynamic_cast<Paper_column *> (loose);
32 if (col->get_system ())
39 SCM between = loose->get_object ("between-cols");
40 if (!scm_is_pair (between))
43 Item *le = dynamic_cast<Item *> (unsmob_grob (scm_car (between)));
44 Item *re = dynamic_cast<Item *> (unsmob_grob (scm_cdr (between)));
51 left = le->get_column ();
52 if (!left->get_system ())
53 left = left->find_prebroken_piece (RIGHT);
57 loose = right = re->get_column ();
60 if (!right->get_system ())
61 right = right->find_prebroken_piece (LEFT);
63 Grob *common = right->common_refpoint (left, X_AXIS);
66 Real total_space = 0.0;
67 Real total_fixed = 0.0;
69 extract_grob_set (col, "spacing-wishes", wishes);
70 for (int i = 0; i < wishes.size (); i++)
72 Grob *spacing = wishes[i];
73 if (Staff_spacing::has_interface (spacing))
77 Staff_spacing::get_spacing_params (spacing, &space, &fixed);
85 Real right_point = 0.0;
86 Real distance_to_next = 0.0;
92 distance_to_next = total_space;
93 right_point = right->relative_coordinate (common, X_AXIS);
97 Interval my_extent = col->extent (col, X_AXIS);
98 distance_to_next = my_extent[RIGHT] + default_padding;
99 right_point = right->extent (common, X_AXIS)[LEFT];
102 Real my_offset = right_point - distance_to_next;
104 col->system_ = which;
105 col->translate_axis (my_offset - col->relative_coordinate (common, X_AXIS), X_AXIS);