Contents

module Music
module Transcription

class MeasureScore < NoteScore
  attr_accessor :start_meter, :meter_changes
  
  def initialize start_meter, start_tempo, meter_changes: {}, tempo_changes: {}, parts: {}, program: Program.new
    @start_meter = start_meter
    @meter_changes = meter_changes
    
    super(start_tempo, tempo_changes: tempo_changes,
          program: program, parts: parts)
    yield(self) if block_given?
  end
  
  def check_methods
    super() + [:check_startmeter_type, :check_meterchange_types,
               :check_meterchange_durs, :check_meterchange_offsets]
  end
  
  def validatables
    super() + [ @start_meter ] + @meter_changes.values.map {|v| v.value}
  end
  
  def self.valid_tempo_types
    NoteScore.valid_tempo_types + [ Tempo::BPM ]
  end
  
  def check_startmeter_type
    unless @start_meter.is_a? Meter
      raise TypeError, "start meter #{@start_meter} is not a Meter object"
    end
  end
  
  def check_meterchange_types
    badtypes = @meter_changes.select {|k,v| !v.value.is_a?(Meter) }
    if badtypes.any?
      raise TypeError, "meter change values #{nonmeter_values} are not Meter objects"
    end
  end
  
  def check_meterchange_offsets
    badoffsets = @meter_changes.select {|k,v| k != k.to_i }
    if badoffsets.any?
      raise NonIntegerError, "meter changes #{badoffsets} have non-integer offsets"
    end
  end
  
  def check_meterchange_durs
    nonzero_duration = @meter_changes.select {|k,v| !v.is_a?(Change::Immediate) }
    if nonzero_duration.any?
      raise NonZeroError, "meter changes #{nonzero_duration} are not immediate"
    end
  end
  
  def ==(other)
    return super() && @start_meter == other.start_meter &&
      @meter_changes == other.meter_changes
  end    
end

end
end

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
music-transcription-0.20.0	lib/music-transcription/model/measure_score.rb