Add a TODO comment re grace note spacing.

[lilypond.git] / input / lsr / engravers-one-by-one.ly

%% Do not edit this file; it is auto-generated from LSR http://lsr.dsi.unimi.it
%% This file is in the public domain.
\version "2.11.35"

\header {
  lsrtags = "contexts-and-engravers"
 texidoc = "
The notation problem, creating a certain symbol, is handled by plugins.
Each plugin is called an Engraver. In this example, engravers are
switched on one by one, in the following order:

- note heads


- staff symbol,


- clef,


- stem,


- beams, slurs, accents,


- accidentals, bar lines, time signature, and key signature.



Engravers are grouped. For example, note heads, slurs, beams etc. form
a Voice context. Engravers for key, accidental, bar, etc. form a Staff
context.


You may only see the first example in this document; please download
this snippet and run it from your own computer. 
" }
% begin verbatim
%% sample music
topVoice =  \relative c' {
  \key d\major
  es8([ g] a[ fis])
  b4
  b16[-. b-. b-. cis-.]
  d4->
}

botVoice =  \relative c' {
  \key d\major
  c8[( f] b[ a)]
  es4
  es16[-. es-. es-. fis-.]
  b4->
}

hoom =  \relative c {
  \key d \major
  \clef bass
  g8-. r
  r4 
  fis8-.
  r8
  r4
  b'4->
}

pah =  \relative c' {
  r8 b-.
  r4
  r8 g8-.
  r16 g-. r8
  \clef treble
  fis'4->
}

%
% setup for Request->Element conversion. Guru-only
%

MyStaff =\context {
  \type "Engraver_group"
  \name Staff

  \description "Handles clefs, bar lines, keys, accidentals.  It can contain
@code{Voice} contexts."

  
  \consists "Output_property_engraver"  
  
  \consists "Font_size_engraver"

  \consists "Volta_engraver"
  \consists "Separating_line_group_engraver"    
  \consists "Dot_column_engraver"

  \consists "Ottava_spanner_engraver"
  \consists "Rest_collision_engraver"
  \consists "Piano_pedal_engraver"
  \consists "Piano_pedal_align_engraver"
  \consists "Instrument_name_engraver"
  \consists "Grob_pq_engraver"
  \consists "Forbid_line_break_engraver"
  \consists "Axis_group_engraver"

  \consists "Pitch_squash_engraver"

  \override VerticalAxisGroup #'minimum-Y-extent = #'(-6 . 6)
  extraVerticalExtent = ##f
  verticalExtent = ##f 
  localKeySignature = #'()

                                % explicitly set instrument, so we don't get 
                                % weird effects when doing instrument names for
                                % piano staves

  instrumentName = #'()
  shortInstrumentName = #'()
  
  \accepts "Voice"
}


MyVoice = \context {
  \type "Engraver_group"
  \name Voice

  \description "
    Corresponds to a voice on a staff.  This context handles the
    conversion of dynamic signs, stems, beams, super- and subscripts,
    slurs, ties, and rests.

    You have to instantiate this explicitly if you want to have
    multiple voices on the same staff."

  localKeySignature = #'()
  \consists "Font_size_engraver"
  
                                % must come before all
  \consists "Output_property_engraver"  
  \consists "Arpeggio_engraver"
  \consists "Multi_measure_rest_engraver"
  \consists "Text_spanner_engraver"
  \consists "Grob_pq_engraver"
  \consists "Note_head_line_engraver"
  \consists "Glissando_engraver"
  \consists "Ligature_bracket_engraver"
  \consists "Breathing_sign_engraver"
                                % \consists "Rest_engraver"
  \consists "Grace_beam_engraver"
  \consists "New_fingering_engraver"
  \consists "Chord_tremolo_engraver"
  \consists "Percent_repeat_engraver"
  \consists "Slash_repeat_engraver"

%{
  Must come before text_engraver, but after note_column engraver.

%}
  \consists "Text_engraver"
  \consists "Dynamic_engraver"
  \consists "Fingering_engraver"

  \consists "Script_column_engraver"
  \consists "Rhythmic_column_engraver"
  \consists "Cluster_spanner_engraver"
  \consists "Tie_engraver"
  \consists "Tie_engraver"
  \consists "Tuplet_engraver"
  \consists "Note_heads_engraver"
  \consists "Rest_engraver"

  \consists "Skip_event_swallow_translator"
}


\score {
  \topVoice
  \layout {
    \context { \MyStaff }
    \context { \MyVoice }
  }
}


MyStaff = \context {
    \MyStaff
    \consists "Staff_symbol_engraver"
}

\score {
  \topVoice
  \layout {
      \context { \MyStaff }
      \context { \MyVoice }
            }
}

MyStaff = \context {
    \MyStaff
    \consists "Clef_engraver"
    \remove "Pitch_squash_engraver"
}

\score {
  \topVoice
  \layout {
    \context { \MyStaff }
    \context { \MyVoice }
  }
}

MyVoice = \context {
  \MyVoice
  \consists "Stem_engraver"
}

\score {
  \topVoice
  \layout {
    \context { \MyStaff }
    \context { \MyVoice }
  }
}

MyVoice = \context {
  \MyVoice
  \consists "Beam_engraver"
}

\score {
  \topVoice
  \layout {
    \context { \MyStaff }
    \context { \MyVoice }
  }
}

MyVoice= \context {
  \MyVoice
  \consists "Phrasing_slur_engraver"
  \consists "Slur_engraver"
  \consists "Script_engraver"
}


\score {
  \topVoice
  \layout {
    \context { \MyStaff }
    \context { \MyVoice }
  }
}

MyStaff = \context {
  \MyStaff
  \consists "Bar_engraver"
  \consists "Time_signature_engraver"
}

\score {
  \topVoice
  \layout {
    \context { \MyStaff }
    \context { \MyVoice }
  }
}

MyStaff = \context {
  \MyStaff
  \consists "Accidental_engraver"    
  \consists "Key_engraver"
}
\score {
  \topVoice
  \layout {
    \context { \MyStaff }
    \context { \MyVoice }
  }
}