lily/instrument-name-engraver.cc

   1 /*
   2   new-staff-margin-engraver.cc --  implement Instrument_name_engraver
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7
   8  */
   9
  10 #include "engraver.hh"
  11 #include "item.hh"
  12 #include "bar.hh"
  13 #include "system-start-delimiter.hh"
  14 #include "side-position-interface.hh"
  15 #include "align-interface.hh"
  16
  17 class Instrument_name_engraver : public Engraver
  18 {
  19   Item *text_;
  20   Grob * delim_ ;
  21
  22   void create_text (SCM s);
  23 public:
  24   VIRTUAL_COPY_CONS(Translator);
  25   Instrument_name_engraver ();
  26
  27   virtual void acknowledge_grob (Grob_info);
  28   virtual void stop_translation_timestep ();
  29 };
  30
  31 ADD_THIS_TRANSLATOR(Instrument_name_engraver);
  32
  33 Instrument_name_engraver::Instrument_name_engraver ()
  34 {
  35   text_ = 0;
  36   delim_ =0;
  37 }
  38
  39
  40 void
  41 Instrument_name_engraver::stop_translation_timestep ()
  42 {
  43   if (text_)
  44     {
  45       typeset_grob (text_);
  46       text_ = 0;
  47     }
  48 }
  49
  50 void
  51 Instrument_name_engraver::create_text (SCM txt)
  52 {
  53   if(!text_)
  54     {
  55       text_ = new Item (get_property ("InstrumentName"));
  56
  57       if (text_->get_grob_property ("text") != txt)
  58         text_->set_grob_property ("text", txt);
  59
  60       if (delim_)
  61         text_->set_parent (delim_, Y_AXIS);
  62
  63       announce_grob (text_,0);
  64     }
  65 }
  66
  67 void
  68 Instrument_name_engraver::acknowledge_grob (Grob_info i)
  69 {
  70   if (Bar::has_interface (i.elem_l_))
  71     {
  72       SCM s = get_property ("instrument");
  73
  74       if (now_mom () > Moment (0))
  75         s = get_property ("instr");
  76
  77       /*
  78         FIXME: use markup_p () to check type.
  79       */
  80       if (gh_string_p (s))
  81         create_text (s);
  82
  83     }
  84
  85   if (Align_interface::has_interface (i.elem_l_)
  86       && Align_interface::axis  (i.elem_l_) == Y_AXIS
  87       //System_start_delimiter::has_interface (i.elem_l_)
  88       && i.origin_trans_l_->daddy_trans_l_ == daddy_trans_l_)
  89     {
  90       delim_ = i.elem_l_;
  91     }
  92 }
  93
  94
  95
  96