SCM
Staff_symbol::print (SCM smob)
{
- Grob *me = Grob::unsmob (smob);
+ Grob *me = unsmob<Grob> (smob);
Spanner *sp = dynamic_cast<Spanner *> (me);
Grob *common
= sp->get_bound (LEFT)->common_refpoint (sp->get_bound (RIGHT), X_AXIS);
}
vector<Real>
-Staff_symbol::ledger_positions (Grob *me, int pos)
+Staff_symbol::ledger_positions (Grob *me, int pos, Item const *head)
{
+ // allow override of ledger positions via note head grob...
+ if (head)
+ {
+ SCM posns = head->get_property ("ledger-positions");
+ if (scm_is_pair (posns))
+ return ly_scm2floatvector (posns);
+ }
+
+ // ...or via custom ledger positions function
+ SCM lp_function = me->get_property ("ledger-positions-function");
+ if (scm_is_pair (lp_function))
+ {
+ SCM func = scm_eval (lp_function, scm_interaction_environment ());
+ if (ly_is_procedure (func))
+ return ly_scm2floatvector (scm_call_2 (func,
+ me->self_scm (),
+ scm_from_int (pos)));
+ }
+
SCM ledger_positions = me->get_property ("ledger-positions");
Real ledger_extra = robust_scm2double (me->get_property ("ledger-extra"), 0);
vector<Real> line_positions = Staff_symbol::line_positions (me);
Direction dir = (Direction)sign (pos - nearest_line);
if (scm_is_pair (ledger_positions))
- // custom ledger line positions
+ // custom ledger positions via StaffSymbol.ledger-positions
{
Real min_pos = HUGE_VAL;
Real max_pos = -HUGE_VAL;
values[i] = nearest_line + dir * (ledger_count - i) * 2;
}
}
- return values;
+ // remove any ledger lines that would fall on staff lines,
+ // which can happen when ledger-extra > 0
+ vector<Real> final_values;
+ for (vector<Real>::const_iterator i = values.begin (),
+ e = values.end ();
+ i != e;
+ ++i)
+ {
+ if (find (line_positions.begin (), line_positions.end (), *i) == line_positions.end ())
+ {
+ final_values.push_back (*i);
+ }
+ }
+ return final_values;
}
int
SCM
Staff_symbol::height (SCM smob)
{
- Grob *me = Grob::unsmob (smob);
+ Grob *me = unsmob<Grob> (smob);
Real t = me->layout ()->get_dimension (ly_symbol2scm ("line-thickness"));
t *= robust_scm2double (me->get_property ("thickness"), 1.0);
"ledger-extra "
"ledger-line-thickness "
"ledger-positions "
+ "ledger-positions-function "
"line-count "
"line-positions "
"staff-space "