/*
- vertical-align-grav.cc -- implement Vertical_align_engraver
+ vertical-align-engraver.cc -- implement Vertical_align_engraver
source file of the GNU LilyPond music typesetter
- (c) 1997--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1997--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
*/
-#include "translator-group.hh"
-#include "axis-group-engraver.hh"
+#include "context.hh"
#include "paper-column.hh"
-#include "vertical-align-engraver.hh"
-#include "axis-align-spanner.hh"
-#include "axis-group-spanner.hh"
+#include "align-interface.hh"
#include "span-bar.hh"
+#include "axis-group-interface.hh"
+#include "engraver.hh"
+#include "spanner.hh"
-Vertical_align_engraver::Vertical_align_engraver()
+class Vertical_align_engraver : public Engraver
{
- valign_p_ =0;
-}
-
-void
-Vertical_align_engraver::do_creation_processing()
+ Spanner *valign_;
+ bool qualifies (Grob_info) const;
+public:
+ TRANSLATOR_DECLARATIONS (Vertical_align_engraver);
+protected:
+ virtual void acknowledge_grob (Grob_info);
+ virtual void process_music ();
+ virtual void finalize ();
+};
+
+Vertical_align_engraver::Vertical_align_engraver ()
{
- valign_p_ =new Axis_align_spanner;
- valign_p_->set_axis (Y_AXIS);
- valign_p_->stacking_dir_ = DOWN;
-
- valign_p_->set_bounds(LEFT,get_staff_info().command_pcol_l ());
- announce_element (Score_element_info (valign_p_ , 0));
+ valign_ = 0;
}
void
-Vertical_align_engraver::do_removal_processing()
+Vertical_align_engraver::process_music ()
{
- SCM dist (get_property ("maxVerticalAlign", 0));
- if (gh_number_p(dist))
- {
- valign_p_->threshold_interval_[BIGGER] = gh_scm2double (dist);
- }
-
- dist = get_property ("minVerticalAlign", 0);
- if (gh_number_p(dist))
+ if (!valign_)
{
- valign_p_->threshold_interval_[SMALLER] = gh_scm2double (dist);
+ valign_ = make_spanner ("VerticalAlignment", SCM_EOL);
+ valign_->set_bound (LEFT, unsmob_grob (get_property ("currentCommandColumn")));
}
+}
- dist = get_property ("alignmentReference",0);
- if (isdir_b (dist))
+void
+Vertical_align_engraver::finalize ()
+{
+ if (valign_)
{
- valign_p_->align_dir_ = to_dir (dist);
+ valign_->set_bound (RIGHT, unsmob_grob (get_property ("currentCommandColumn")));
+ valign_ = 0;
}
- valign_p_->set_bounds(RIGHT,get_staff_info().command_pcol_l ());
- typeset_element (valign_p_);
- valign_p_ =0;
}
-
bool
-Vertical_align_engraver::qualifies_b (Score_element_info i) const
+Vertical_align_engraver::qualifies (Grob_info i) const
{
- int sz = i.origin_trans_l_arr_.size() ;
-
-
- Axis_group_element * elt = dynamic_cast<Axis_group_element *> (i.elem_l_);
+ int sz = i.origin_contexts ((Translator *)this).size ();
- return sz > 1 && elt && elt->axes_[0] == Y_AXIS && !elt->parent_l (Y_AXIS);
+ return sz > 0 && Axis_group_interface::has_interface (i.grob_)
+ && !i.grob_->get_parent (Y_AXIS) && Axis_group_interface::has_axis (i.grob_, Y_AXIS);
}
void
-Vertical_align_engraver::acknowledge_element (Score_element_info i)
+Vertical_align_engraver::acknowledge_grob (Grob_info i)
{
- if (qualifies_b (i))
+ if (qualifies (i))
{
- valign_p_->add_element (i.elem_l_);
+ Align_interface::add_element (valign_, i.grob_, get_property ("verticalAlignmentChildCallback"));
}
- else if (dynamic_cast<Span_bar*>(i.elem_l_) && i.origin_trans_l_arr_.size ())
- {
- i.elem_l_->add_dependency (valign_p_);
- }
}
-
-
-ADD_THIS_TRANSLATOR(Vertical_align_engraver);
+ADD_TRANSLATOR (Vertical_align_engraver,
+ /* descr */ "Catch Vertical axis groups and stack them.",
+ /* creats*/ "VerticalAlignment",
+ /* accepts */ "",
+ /* acks */ "axis-group-interface",
+ /* reads */ "",
+ /* write */ "");