Gianmaria Lari <address@hidden> writes:
> On Mon, 21 Jan 2019 at 14:57, Gianmaria Lari <address@hidden>
> wrote:
>
>>
>>
>> On Mon, 21 Jan 2019 at 13:02, Valentin Villenave <address@hidden>
>> wrote:
>>
>>> On 1/21/19, Andrew Bernard <address@hidden> wrote:
>>> > Not sure how to do it with PianoStaff.
>>>
>>> That’s because of the Keep_alive_together engraver. Your layout block
>>> should look like:
>>>
>>> \layout {
>>> \context {
>>> \PianoStaff
>>> \RemoveEmptyStaves
>>> \remove "Keep_alive_together_engraver"
>>> \override VerticalAxisGroup.remove-first = ##t
>>> }
>>> }
>>>
>>> That being said, I have never seen a piano part where only one of the
>>> hands is printed when the other doesn’t play. (Vibraphone and marimba
>>> parts, maybe.) That’s why we added this feature in the first place.
>>>
>> [...]
>
> Valentin, your solution works well if the staff is made of rests (r) or
> skips (s). Is it possible to print the staff if it contains rests but avoid
> to print it if it contains skip?
[NR:]
A.20 Context modification identifiers
=====================================
The following commands are defined for use as context modifications
within a ‘\layout’ or ‘\with’ block.
‘RemoveAllEmptyStaves’
Remove staves which are considered to be empty according to the
list of interfaces set by ‘keepAliveInterfaces’, including those in
the first system.
• Sets grob property ‘remove-empty’ in ‘*note
(lilypond-internals)VerticalAxisGroup::’ to ‘#t’.
• Sets grob property ‘remove-first’ in ‘*note
(lilypond-internals)VerticalAxisGroup::’ to ‘#t’.
‘RemoveEmptyStaves’
Remove staves which are considered to be empty according to the
list of interfaces set by ‘keepAliveInterfaces’.
• Sets grob property ‘remove-empty’ in ‘*note
(lilypond-internals)VerticalAxisGroup::’ to ‘#t’.
[IR:]
2.2.5 Axis_group_engraver
-------------------------
Group all objects created in this context in a ‘VerticalAxisGroup’
spanner.
Properties (read)
‘currentCommandColumn’ (graphical (layout) object)
Grob that is X-parent to all current breakable (clef, key
signature, etc.) items.
‘hasAxisGroup’ (boolean)
True if the current context is contained in an axis group.
‘keepAliveInterfaces’ (list)
A list of symbols, signifying grob interfaces that are worth
keeping a staff with ‘remove-empty’ set around for.
Properties (write)
‘hasAxisGroup’ (boolean)
True if the current context is contained in an axis group.
This engraver creates the following layout object(s):
*note VerticalAxisGroup::.
‘Axis_group_engraver’ is part of the following context(s): *note
ChordNames::, *note DrumStaff::, *note Dynamics::, *note FiguredBass::,
*note FretBoards::, *note GregorianTranscriptionStaff::, *note
KievanStaff::, *note Lyrics::, *note MensuralStaff::, *note NoteNames::,
*note OneStaff::, *note PetrucciStaff::, *note RhythmicStaff::, *note
Staff::, *note TabStaff:: and *note VaticanaStaff::.
[ly/engraver-init.ly in definition of Score]
keepAliveInterfaces = #'(
bass-figure-interface
chord-name-interface
cluster-beacon-interface
fret-diagram-interface
lyric-syllable-interface
note-head-interface
tab-note-head-interface
lyric-interface
percent-repeat-item-interface
percent-repeat-interface
;; need this, as stanza numbers are items, and appear only once.
stanza-number-interface
)
So probably you likely want to add the rest-interface to that list of
interfaces, probably in Staff context.
--
David Kastrup
I post here another solution that's not clean as David solution. It's a simple escamotage.
To make lilypond print anyway a staff only containing rests I put in the staff a zero length note and hide it like this:
I saw only two drawbacks (?):
1 You have to put this hide note in each line that is made of rests
2 There is some small rest alignment issue in the bar where you put the hide note
In my case these two drawbacks were not a problem.
Here a complete (and simple) example that compiles.
\version "2.19.82"
stone = {
\clef treble
a1 b c' d' \break
a1 b c' d' \break
a1 b c' d' \break
}
sttwo = {
\clef bass
\hideNotes g4*0 R1*4 \unHideNotes
f1 g a b \break
f1 g a b \break
}
sttre = {
\clef bass
s1*4
a1 b c' d'
s1*4
}
\score {
\new PianoStaff { <<
\new Staff \with {instrumentName = #"S1" shortInstrumentName = #"S1"} \stone
\new Staff \with {instrumentName = #"S2" shortInstrumentName = #"S2"} \sttwo
\new Staff \with {instrumentName = #"S3" shortInstrumentName = #"S3"} \sttre
>> }
\layout {
\context {
\PianoStaff
\RemoveEmptyStaves
\remove "Keep_alive_together_engraver"
\override VerticalAxisGroup.remove-first = ##t
}
}
}
Thank you for everybody help.
g.