2 extender-engraver.cc -- implement Extender_engraver
4 (c) 1999 Glen Prideaux <glenprideaux@iname.com>,
5 Han-Wen Nienhuys, Jan Nieuwenhuizen.
10 #include "musical-request.hh"
11 #include "extender-spanner.hh"
12 #include "paper-column.hh"
14 #include "engraver.hh"
15 #include "drul-array.hh"
16 #include "extender-spanner.hh"
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.
25 We remember the last 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
29 class Extender_engraver : public Engraver
32 Item * current_lyric_l_;
37 VIRTUAL_COPY_CONS (Translator);
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 ();
51 ADD_THIS_TRANSLATOR (Extender_engraver);
53 Extender_engraver::Extender_engraver ()
62 Extender_engraver::acknowledge_element (Score_element_info i)
65 if (Item* t = dynamic_cast<Item*> (i.elem_l_))
69 && !extender_p_->get_bound (RIGHT)
72 Lyric_extender(extender_p_).set_textitem (RIGHT, t);
79 Extender_engraver::do_try_music (Music* r)
81 if (Extender_req* p = dynamic_cast <Extender_req *> (r))
93 Extender_engraver::do_removal_processing ()
97 req_l_->warning (_ ("unterminated extender"));
98 extender_p_->set_bound(RIGHT, get_staff_info ().command_pcol_l ());
103 Extender_engraver::do_process_music ()
109 req_l_->warning (_ ("Nothing to connect extender to on the left. Ignoring extender request."));
113 extender_p_ = new Spanner (get_property ("basicLyricExtenderProperties"));
114 extender_p_->set_extent_callback (Score_element::point_dimension_callback, Y_AXIS);
116 Lyric_extender (extender_p_).set_textitem (LEFT, last_lyric_l_);
117 announce_element (Score_element_info (extender_p_, req_l_));
123 Extender_engraver::do_pre_move_processing ()
127 typeset_element (extender_p_);
131 if (current_lyric_l_)
133 last_lyric_l_ = current_lyric_l_;
139 Extender_engraver::do_post_move_processing ()