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/*
This file is part of LilyPond, the GNU music typesetter.
Copyright (C) 2005--2015 Han-Wen Nienhuys <hanwen@xs4all.nl>
LilyPond is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
LilyPond is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
*/
#include "grid-line-interface.hh"
#include "grob.hh"
#include "pointer-group-interface.hh"
#include "lookup.hh"
#include "output-def.hh"
MAKE_SCHEME_CALLBACK (Grid_line_interface, print, 1);
SCM
Grid_line_interface::print (SCM smobbed_me)
{
Grob *me = unsmob<Grob> (smobbed_me);
extract_grob_set (me, "elements", elts);
/* compute common refpoint of elements */
Grob *refp = common_refpoint_of_array (elts, me, Y_AXIS);
Interval iv;
for (vsize i = 0; i < elts.size (); i++)
{
Grob *point = elts[i];
iv.unite (point->extent (refp, Y_AXIS));
}
if (iv.is_empty ())
{
me->suicide ();
return SCM_EOL;
}
Real staffline = me->layout ()->get_dimension (ly_symbol2scm ("line-thickness"));
Real thick = robust_scm2double (me->get_property ("thickness"), 1.0)
* staffline;
iv += -me->relative_coordinate (refp, Y_AXIS);
Stencil st = Lookup::filled_box (Box (Interval (0, thick),
iv));
return st.smobbed_copy ();
}
MAKE_SCHEME_CALLBACK (Grid_line_interface, width, 1);
SCM
Grid_line_interface::width (SCM smob)
{
Grob *me = unsmob<Grob> (smob);
Real staffline = me->layout ()->get_dimension (ly_symbol2scm ("line-thickness"));
Real thick = robust_scm2double (me->get_property ("thickness"), 1.0)
* staffline;
return ly_interval2scm (Interval (0, thick));
}
void
Grid_line_interface::add_grid_point (Grob *me, Grob *b)
{
Pointer_group_interface::add_grob (me, ly_symbol2scm ("elements"), b);
}
ADD_INTERFACE (Grid_line_interface,
"A line that is spanned between grid-points.",
/* properties */
"elements "
"thickness "
);
ADD_INTERFACE (Grid_point_interface,
"A spanning point for grid lines.",
/* properties */
""
);
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