source file of the GNU LilyPond music typesetter
- (c) 1999--2002 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1999--2003 Han-Wen Nienhuys <hanwen@cs.uu.nl>
*/
#include <math.h>
#include "staff-symbol.hh"
#include "paper-def.hh"
-bool
-Staff_symbol_referencer::has_interface (Grob*e)
-{
- return unsmob_grob (e->get_grob_property ("staff-symbol"))
- || gh_number_p (e->get_grob_property ("staff-position"));
-}
+
int
Staff_symbol_referencer::line_count (Grob*me)
{
- Grob *st = staff_symbol_l (me);
+ Grob *st = get_staff_symbol (me);
return st ? Staff_symbol::line_count (st) : 0;
}
bool
Staff_symbol_referencer::on_staffline (Grob*me)
{
- return on_staffline (me, (int) rint (position_f (me)));
+ return on_staffline (me, (int) rint (get_position (me)));
}
bool
}
Grob*
-Staff_symbol_referencer::staff_symbol_l (Grob*me)
+Staff_symbol_referencer::get_staff_symbol (Grob*me)
{
SCM st = me->get_grob_property ("staff-symbol");
return unsmob_grob (st);
Real
Staff_symbol_referencer::staff_space (Grob*me)
{
- Grob * st = staff_symbol_l (me);
+ Grob * st = get_staff_symbol (me);
if (st)
return Staff_symbol::staff_space (st);
-
return 1.0;
}
-
Real
-Staff_symbol_referencer::position_f (Grob*me)
+Staff_symbol_referencer::get_position (Grob*me)
{
Real p =0.0;
- Grob * st = staff_symbol_l (me);
+ Grob * st = get_staff_symbol (me);
Grob * c = st ? me->common_refpoint (st, Y_AXIS) : 0;
if (st && c)
{
void
Staff_symbol_referencer::set_position (Grob*me,Real p)
{
- Grob * st = staff_symbol_l (me);
+ Grob * st = get_staff_symbol (me);
if (st && me->common_refpoint (st, Y_AXIS))
{
- Real oldpos = position_f (me);
+ Real oldpos = get_position (me);
me->set_grob_property ("staff-position", gh_double2scm (p - oldpos));
}
else
}
/*
- half of the height, in staff space.
- */
+ Half of the height, in staff space, i.e. 2.0 for a normal staff.
+*/
Real
Staff_symbol_referencer::staff_radius (Grob*me)
{
- return (line_count (me) -1) / 2;
+ return (line_count (me) -1) / 2.0;
}
int
compare_position (Grob *const &a, Grob * const &b)
{
- return sign (Staff_symbol_referencer::position_f ((Grob*)a) -
- Staff_symbol_referencer::position_f ((Grob*)b));
-}
-
-
-void
-Staff_symbol_referencer::set_interface (Grob * e)
-{
- e->add_offset_callback (Staff_symbol_referencer::callback_proc, Y_AXIS);
+ return sign (Staff_symbol_referencer::get_position ((Grob*)a) -
+ Staff_symbol_referencer::get_position ((Grob*)b));
}
+ADD_INTERFACE (Staff_symbol_referencer,"staff-symbol-referencer-interface",
+ "Object whose Y position is meaning with reference to a staff "
+"symbol. Objects that have this interface should include "
+"Staff_symbol_referencer::callback in their Y-offset-callback. "
+,
+ "staff-position");