lily/include/extender-engraver.hh

   1 /*
   2   extender-engraver.hh -- declare Extender_engraver
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1999 Glen Prideaux <glenprideaux@iname.com>,
   7   Han-Wen Nienhuys, Jan Nieuwenhuizen.
   8 */
   9
  10 #ifndef EXTENDER_ENGRAVER_HH
  11 #define EXTENDER_ENGRAVER_HH
  12
  13 #include "engraver.hh"
  14 #include "drul-array.hh"
  15 #include "extender-spanner.hh"
  16 #include "pqueue.hh"
  17 #include "extender-engraver.hh"
  18
  19
  20 /**
  21   Generate an centred extender.  Should make a Extender_spanner that
  22   typesets a nice centred extender of varying length depending on the
  23   gap between syllables.
  24
  25   We remember the last Text_item that come across. When we get a
  26   request, we create the spanner, and attach the left point to the
  27   last lyrics, and the right point to any lyrics we receive by
  28   then.  */
  29 class Extender_engraver : public Engraver
  30 {
  31   Text_item *  last_lyric_l_;
  32   Text_item * current_lyric_l_;
  33   Extender_req* req_l_;
  34   Extender_spanner* extender_spanner_p_;
  35 public:
  36   Extender_engraver ();
  37   VIRTUAL_COPY_CONS (Translator);
  38
  39 protected:
  40   virtual void acknowledge_element (Score_element_info);
  41   virtual void do_removal_processing();
  42   virtual void do_process_music();
  43   virtual bool do_try_music (Music*);
  44   virtual void do_pre_move_processing();
  45   virtual void do_post_move_processing ();
  46 private:
  47
  48 };
  49
  50 #endif // EXTENDER_ENGRAVER_HH