2 staff-margin-engraver.cc -- implement Staff_margin_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 1998--2000 Jan Nieuwenhuizen <janneke@gnu.org>
9 #include "translator.hh"
10 #include "engraver.hh"
12 #include "dimension-cache.hh"
13 #include "timing-translator.hh"
14 #include "text-item.hh"
15 #include "side-position-interface.hh"
16 #include "bar-script-engraver.hh"
17 #include "staff-symbol-referencer.hh"
18 #include "staff-symbol.hh"
24 * merge with/derive from/add functionality to Bar_script_engraver
28 Hang on left edge of staff to provide suppor for simple items.
30 class Left_edge_item : public Item
33 VIRTUAL_COPY_CONS (Score_element);
37 put (instrument) text to left of line
39 class Staff_margin_engraver : public Engraver
42 VIRTUAL_COPY_CONS (Translator);
43 Staff_margin_engraver ();
46 virtual void do_pre_move_processing ();
47 virtual void acknowledge_element (Score_element_info);
52 Left_edge_item* left_edge_p_;
53 void create_text (SCM);
56 ADD_THIS_TRANSLATOR (Staff_margin_engraver);
59 Staff_margin_engraver::Staff_margin_engraver ()
67 Staff_margin_engraver::acknowledge_element (Score_element_info info)
69 SCM s = get_property ("instrument");
71 if (now_mom () > Moment (0))
72 s = get_property ("instr");
74 //s = ly_str02scm ("HALLO");
76 if (dynamic_cast<Bar*> (info.elem_l_) && gh_string_p (s))
81 Staff_margin_engraver::create_text (SCM text)
85 assert (!left_edge_p_);
86 Left_edge_item* l = new Left_edge_item;
88 l->set_elt_property ("breakable", SCM_BOOL_T);
89 l->set_elt_property ("break-aligned", SCM_BOOL_T);
91 announce_element (Score_element_info (l, 0));
93 Staff_symbol_referencer_interface sl (l);
97 Text_item* t = new Text_item;
99 t->set_elt_property ("self-alignment-Y", gh_int2scm (0));
100 t->add_offset_callback (Side_position_interface::aligned_on_self, Y_AXIS);
102 t->set_parent (l, X_AXIS);
103 t->set_parent (l, Y_AXIS);
105 // 'just to be sure': see Clef_item::do_add_processing
106 l->add_dependency (t);
108 announce_element (Score_element_info (t, 0));
112 In almost every score that uses "instrument" and "instr"
113 we need two different paddings.
114 Let's try one of those first:
115 instrumentScriptPadding/instrScriptPadding
117 SCM s = get_property (String (now_mom () ? "instr" : "instrument")
119 if (!gh_number_p (s))
120 s = get_property (type_ + "ScriptPadding");
123 //t->set_elt_property ("padding", s);
124 t->translate_axis (-gh_scm2double (s), X_AXIS);
128 //text_p_->set_elt_property ("style", s);
129 //text_p_->set_elt_property ("direction", gh_int2scm (RIGHT));
130 text_p_->set_elt_property ("text", text);
134 Staff_margin_engraver::do_pre_move_processing ()
139 Let's not allow user settings for visibility function (yet).
140 Although end-of-line would work, to some extent, we should
141 make a properly ordered Right_edge_item, if that need arises.
143 text_p_->set_elt_property("visibility-lambda",
144 ly_eval_str ("begin-of-line-visible"));
145 typeset_element (text_p_);
147 assert (left_edge_p_);
148 typeset_element (left_edge_p_);