source file of the GNU LilyPond music typesetter
- (c) 2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 2000--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
*/
-void
-Tie_column::set_interface (Score_element*me)
-{
- me->set_interface (ly_symbol2scm ("tie-column"));
- me->set_extent_callback (SCM_EOL, X_AXIS);
- me->set_extent_callback (SCM_EOL, Y_AXIS) ;
-}
-bool
-Tie_column::has_interface (Score_element*me)
-{
- return me->has_interface (ly_symbol2scm ("tie-column"));
-}
+
+/*
+ tie dir depends on what Tie_column does.
+*/
+/*
+ TODO: this doesn't follow standard pattern. Regularize.
+ */
void
-Tie_column::add_tie (Score_element*me,Score_element *s)
+Tie_column::add_tie (Grob*me,Grob *s)
{
-
- if (! Pointer_group_interface ::count (me, "ties"))
+ if (s->get_parent (Y_AXIS)
+ && Tie_column::has_interface (s->get_parent (Y_AXIS)))
+ return ;
+
+ if (! Pointer_group_interface::count (me, "ties"))
{
dynamic_cast<Spanner*> (me)->set_bound (LEFT, Tie::head (s,LEFT));
dynamic_cast<Spanner*> (me)->set_bound (RIGHT, Tie::head (s,RIGHT));
}
-
- Pointer_group_interface::add_element (me, "ties",s);
+ s->set_parent (me, Y_AXIS);
+ Pointer_group_interface::add_grob (me, ly_symbol2scm ("ties"), s);
s->add_dependency (me);
}
+void
+Tie_column::set_directions (Grob*me)
+{
+ werner_directions (me);
+}
+
int
-tie_compare (Score_element* const & s1,
- Score_element* const & s2)
+tie_compare (Grob* const & s1,
+ Grob* const & s2)
{
- return sign (Tie::position_f (s1) - Tie::position_f(s2));
+ return sign (Tie::get_position (s1) - Tie::get_position (s2));
}
/*
Ross forgets about the tie that is *on* the middle staff line. We
assume it goes UP. (TODO: make me settable) */
void
-Tie_column::set_directions (Score_element*me)
+Tie_column::old_directions (Grob*me)
{
- Link_array<Score_element> ties =
- Pointer_group_interface__extract_elements (me, (Score_element*)0, "ties");
+ Link_array<Grob> ties =
+ Pointer_group_interface__extract_grobs (me, (Grob*)0, "ties");
+ for (int i = ties.size (); i--;)
+ if (get_grob_direction (ties[i]))
+ ties.del (i);
- Direction d = Directional_element_interface::get (me);
+ if (!ties.size ())
+ return ;
+ Direction d = get_grob_direction (me);
if (d)
{
for (int i = ties.size (); i--;)
{
- Score_element * t = ties[i];
- Directional_element_interface::set (t, d);
+ Grob * t = ties[i];
+ set_grob_direction (t, d);
}
return;
}
if (ties.size () == 1)
{
- Score_element * t = ties[0];
- Directional_element_interface::set (t,Tie::get_default_dir (t));
+ Grob * t = ties[0];
+ set_grob_direction (t,Tie::get_default_dir (t));
return;
}
ties.sort (tie_compare);
- Directional_element_interface::set( ties[0], DOWN);
+ set_grob_direction (ties[0], DOWN);
ties.del (0);
- Directional_element_interface ::set(ties.pop (), UP);
- for (int i=ties.size(); i--; )
+ set_grob_direction (ties.pop (), UP);
+ for (int i=ties.size (); i--;)
{
- Score_element * t = ties[i];
- Real p = Tie::position_f (t);
+ Grob * t = ties[i];
+ Real p = Tie::get_position (t);
Direction d = (Direction) sign (p);
if (!d)
d = UP;
- Directional_element_interface::set (t, d);
+ set_grob_direction (t, d);
+ }
+
+}
+
+/*
+
+% . The algorithm to choose the direction of the ties doesn't work
+% properly. I suggest the following for applying ties sequentially
+% from top to bottom:
+%
+% + The topmost tie is always `up'.
+%
+% + If there is a vertical gap to the last note above larger than
+% or equal to a fifth (or sixth?), the tie is `up', otherwise it
+% is `down'.
+%
+% + The bottommost tie is always `down'.
+
+ */
+void
+Tie_column::werner_directions (Grob *me)
+{
+ Link_array<Grob> ties =
+ Pointer_group_interface__extract_grobs (me, (Grob*)0, "ties");
+
+ if (!ties.size ())
+ return ;
+
+ ties.sort (tie_compare);
+
+ Direction d = get_grob_direction (me);
+ if (d)
+ {
+ for (int i = ties.size (); i--;)
+ {
+ Grob * t = ties[i];
+ if (!get_grob_direction (t))
+ set_grob_direction (t, d);
+ }
+ return ;
+ }
+
+ if (ties.size () == 1)
+ {
+ Grob * t = ties[0];
+ if (t->live ()
+ && !get_grob_direction (t))
+ set_grob_direction (t,Tie::get_default_dir (t));
+ return ;
}
+
+ Real last_down_pos = 10000;
+ if (!get_grob_direction (ties[0]))
+ set_grob_direction (ties[0], DOWN);
+ for (int i = ties.size (); i--;)
+ {
+ Grob *t = ties[i];
+
+ Direction d = get_grob_direction (t);
+ Real p = Tie::get_position (t);
+ if (!d)
+ {
+ if (last_down_pos - p > 5)
+ {
+ d = UP;
+ }
+ else
+ {
+ d = DOWN;
+ }
+
+ set_grob_direction (t, d);
+ }
+
+ if (d == DOWN)
+ last_down_pos = p;
+ }
+
+ return ;
}
-MAKE_SCHEME_CALLBACK(Tie_column,after_line_breaking,1);
+
+MAKE_SCHEME_CALLBACK (Tie_column,after_line_breaking,1);
SCM
Tie_column::after_line_breaking (SCM smob)
{
- set_directions (unsmob_element (smob));
+ werner_directions (unsmob_grob (smob));
return SCM_UNSPECIFIED;
}
+
+
+
+ADD_INTERFACE (Tie_column,"tie-column-interface",
+ "that sets tie directions in a tied chord",
+ "direction");
+
projects / lilypond.git / blobdiff