Re: Fw: définition d'un nouveau contexte

[Germain G. Ivanoff-Trinadtzaty]

----- Original Message ----- 
From: "Mats Bengtsson" <address@hidden>
To: "Germain G. Ivanoff-Trinadtzaty" <address@hidden>
Cc: "Lilypond users" <address@hidden>
Sent: Friday, June 13, 2008 11:38 AM
Subject: Re: Fw: définition d'un nouveau contexte


> Germain G. Ivanoff-Trinadtzaty wrote:
> > Hello,
> >  I've got two problems defining a new context \StaffSA, based on \Staff.
>
> Your code below defines a new context type StaffSA which does not contain 
> any
> engravers and it's not based on the Staff context type (the description in 
> the manual of
> what \alias does is very simplified and it seems that you have 
> misinterpreted it).


Indeed.


> Unfortunately, there is no good explanation anywhere in the manual on how 
> to make a
> new context type based on an existing one. However, you can find some 
> examples
> in the mailing list archives, for example 
> http://lists.gnu.org/archive/html/lilypond-user/2008-02/msg00837.html
> I also recommend you to take a look at the file ly/engraver-init.ly, where 
> all the
> default contexts are defined. For example, if you look at the definition 
> of
> the PianoStaff context, you will see how to base a new context definition
> on an already existing one.



Thank you very much. It's great to get such pedagogic links, rather than a 
simple answer. ly/engraver-init.ly teaches me a lot.
I usually give up browsing LP files before finding what i need. I'm about to 
install a grep command on my win laptop, cause the integrated windows search 
certainly does search my files, but does not find anything...
I also found this thread on lilypond-user : "Tip: defing new contexts ... 
starting from existing contexts"
http://lists.gnu.org/archive/html/lilypond-user/2007-07/msg00526.html
which I should have checked first.

So, adding \Staff (as a template) in the begining of my new context 
definition, I ensure that it inherits all engravers and settings from the 
template.
But I still don't see what commands get permitted by \alias. I'll use it it, 
of course, but I remain somewhat hungry.



> What is it really that you try to obtain? What should the new context type 
> do that
> Staff doesn't?
>
>   /Mats



In this very first attempt, I only want to integrate voice names in the 
staff definition (\StaffSA stands for \StaffSopranoAlto). As a matter of 
fact, I put together many little SA-TB scores, and I want to save some 
typing and get smaller, smarter \score blocks.
In the future, I want to define a new type of staff, for the so called 
Kievian notation (used from 17-18 centuries to translate the old neumatic 
chants). It looks a little like gregorian music. It will involve new scale, 
new glyphs, bars, etc... Not for today.

Germain



> > I followed instruction from NR 6.2.5 Defining new contexts.
> > http://lilypond.org/doc/v2.11/Documentation/user/lilypond/Defining-new-contexts#Defining-new-contexts
> >  With the definitions that follow :
> > 1) I get two staves for one  \new \StaffSA
> > 2) their instrumentName don't print
> >  What's wrong ?
> >  Thanks,
> > Germain
> >  ps: btw, are de sharps (#) well suited ? (i mean : in the right place ?)
> >  at : "test-newcontext.png"
> >  %% Test de définition d'un nouveau contexte
> >  \version "2.11.47"
> > \include "english.ly"
> >  Global = { \key f \major }
> > NotesDiscantus = { a'4 a'1 }
> > NotesCantus =  { f'4 f'1 }
> > NotesFiller =  { c'4 c'1 }
> > NotesBassus =  { f4 f1 }
> > Words = \lyricmode { Ta __ daa }
> >  %---------------%
> > StaffVoiceNames =  %% for Staff context
> > #(define-music-function  (parser location n-max-width s-one s-two)
> >                          (number? string? string?)
> >   "Format and print voice names for one staff"
> >   #{
> >    \set Staff . instrumentName = \markup { \column {
> >             \hcenter-in #$n-max-width $s-one
> >             \hcenter-in #$n-max-width $s-two } }
> >   #})
> > %---------------%
> > StaffSAVoiceNames =  %% same as above, but for StaffSA context
> > #(define-music-function  (parser location n-max-width s-one s-two)
> >                          (number? string? string?)
> >   "Format and print voice names for one staff"
> >   #{
> >    \set StaffSA . instrumentName = \markup { \column {
> >             \hcenter-in #$n-max-width $s-one
> >             \hcenter-in #$n-max-width $s-two } }
> >   #})
> > %---------------%
> > \layout % commun
> > {
> >  \context { \Score
> >             \remove  Bar_number_engraver }
> >  \context { \ChoirStaff  %% si placé après déf. de StaffSA : idem
> >             \consists Instrument_name_engraver
> >             \override InstrumentName #'self-alignment-X = #LEFT
> >             \accepts  StaffSA }
> >  \context { \Staff
> >             \remove   Time_signature_engraver
> >             \override InstrumentName #'self-alignment-X = #RIGHT }
> >  \context { \name  StaffSA
> >             \type  "Engraver_group"
> >             \alias Staff }
> > }
> > %---------------%
> > \score % 1
> > {
> >  \new ChoirStaff
> >  <<
> >   \set ChoirStaff . instrumentName = "N°1 Strange behaviour :"
> >   \new StaffSA
> >   <<
> >    \StaffSAVoiceNames #3 #"S." #"A."  %% ne donne rien
> > %   \StaffVoiceNames #3 #"S." #"A."    %% ne marche pas non plus
> >    \clef "G" \Global
> >    \new Voice = "one" { \voiceOne \NotesDiscantus }
> >    \new Voice         { \voiceTwo \NotesCantus }
> >   >>
> >  \new Lyrics = thewords { s }
> >  \new Staff
> >   <<
> >    \StaffVoiceNames #3 #"T." #"B." \clef "F" \Global
> >    \new Voice { \voiceOne \NotesFiller }
> >    \new Voice { \voiceTwo \NotesBassus }
> >   >>
> >  \context Lyrics = thewords \lyricsto "one" { \Words }
> >  >>
> >  \layout { indent = 65\mm }
> > }
> >
> > ------------------------------------------------------------------------
> >
> > ------------------------------------------------------------------------
> >
> > _______________________________________________
> > lilypond-user mailing list
> > address@hidden
> > http://lists.gnu.org/mailman/listinfo/lilypond-user
>
> --
> =============================================
> Mats Bengtsson
> Signal Processing
> School of Electrical Engineering
> Royal Institute of Technology (KTH)
> SE-100 44  STOCKHOLM
> Sweden
> Phone: (+46) 8 790 8463 Fax:   (+46) 8 790 7260
> Email: address@hidden
> WWW: http://www.s3.kth.se/~mabe
> =============================================