making all grobs breakable (for easier polymetric scores)

[Kieren MacMillan]

Hi all,

In the attached snippet, I must adjust the [non-visual] duration of the whole 
note and manually add an explicit \bar "" command in order to break the line 
where I want it.

Is there any way to avoid this? I'd like to say, in effect, "during this 
passage, every (e.g.) eighth note should be considered a breakable point for 
the purposes of layout calculations". All notes would maintain their original 
duration (at least visually), all beaming would stay as expected, etc. — it 
would just allow breaking "everywhere". A command like

   \override Score.NonMusicalPaperColumn.line-break-interval = #(ly:make-moment 
1/8)

would be amazing. I do a lot of polymetric passages, some with mixed meters on 
each staff, so doing layout work becomes a challenge when you have to keep 
adjusting durations, adding \bar-s, etc.

Any thoughts/comments would be appreciated — code that solves my problem, even 
more so!

Thanks,
Kieren.

%%%  SNIPPET BEGINS
\version "2.19"

\layout {
  line-width = 3\in
  ragged-right = ##f
  indent = 0
  \context {
    \Score
    \remove "Timing_translator"
    \remove "Default_bar_line_engraver"
  }
  \context {
    \Staff
    \consists "Timing_translator"
    \consists "Default_bar_line_engraver"
  }
}

<<
  \new Staff { \time 3/2 c''1 2 }
  \new Staff { \time 3/4 c''4 4 4 \break 4 4 4}
>>

<<
  \new Staff { \time 3/2 c''1*3/4 \bar "" s4 c''2 }
  \new Staff { \time 3/4 c''4 4 4 \break 4 4 4}
>>
%%%  SNIPPET ENDS
________________________________

Kieren MacMillan, composer
‣ website: www.kierenmacmillan.info
‣ email: address@hidden