layout.line_break_every_seconds — Abjad v1.1.1 documentation

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# layout.line_break_every_seconds

`abjad.tools.layout.` `line_break_every_seconds`(expr, line_duration, klass=<class 'abjad.measure.measure._Measure'>, adjust_eol=False)

  Iterate klass instances in expr and accumulate duration in seconds. Add line break after every total less than or equal to line_duration.

      abjad> t = Staff(RigidMeasure((2, 8), construct.run(2)) * 4)
      abjad> pitchtools.diatonicize(t)
      abjad> tempo_spanner = Tempo(t[:])
      abjad> tempo_indication = TempoIndication(Rational(1, 8), 44)
      abjad> tempo_spanner.indication = tempo_indication
      abjad> print t.format
      \new Staff {
                      \time 2/8
                      \tempo 8=44
                      c'8
                      d'8
                      \time 2/8
                      e'8
                      f'8
                      \time 2/8
                      g'8
                      a'8
                      \time 2/8
                      b'8
                      c''8
                      %% tempo 8=44 ends here
      }

      abjad> layout.line_break_every_seconds(t, Rational(6))
      abjad> print t.format
      \new Staff {
                      \time 2/8
                      \tempo 8=44
                      c'8
                      d'8
                      \time 2/8
                      e'8
                      f'8
                      \break
                      \time 2/8
                      g'8
                      a'8
                      \time 2/8
                      b'8
                      c''8
                      %% tempo 8=44 ends here
      }

  Set `adjust_eol = True` to include a magic Scheme incantation to move end-of-line LilyPond TimeSignature and BarLine grobs to the right.

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