Class: ChartSet

Inherits:
Object
  • Object
show all
Defined in:
app/models/chart_set.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(charts, samples, xaxis) ⇒ ChartSet

constructor taking an array of Charts, an array of samples (which may be nil) and a hash specifying the xaxis options xaxis should specify at least :method the samples may be nil if ajax will be used to fetch the data



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# File 'app/models/chart_set.rb', line 10

def initialize( charts, samples, xaxis )
  @charts = charts
  @samples = samples
  @xaxis = xaxis
  begin
    method = @xaxis[:method]
  rescue
    raise "Flot-rails-plus error: xaxis is not a hash"
  end
  if method == nil
    raise "Flot-rails-plus error: xaxis[:method] is nil"
  end
end

Instance Attribute Details

#charts ⇒ Object (readonly)

class which is a set of charts to be shown on a page where the chars draw their data from the same dataset and are shown with the same recordset



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# File 'app/models/chart_set.rb', line 4

def charts
  @charts
end

#options ⇒ Object (readonly)

class which is a set of charts to be shown on a page where the chars draw their data from the same dataset and are shown with the same recordset



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# File 'app/models/chart_set.rb', line 4

def options
  @options
end

#samples ⇒ Object (readonly)

class which is a set of charts to be shown on a page where the chars draw their data from the same dataset and are shown with the same recordset



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# File 'app/models/chart_set.rb', line 4

def samples
  @samples
end

#xaxis ⇒ Object (readonly)

class which is a set of charts to be shown on a page where the chars draw their data from the same dataset and are shown with the same recordset



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# File 'app/models/chart_set.rb', line 4

def xaxis
  @xaxis
end

Instance Method Details

#as_hash(options = {:with_charts => true}) ⇒ Object

returns the values that are to be passed to the client browser, as a hash if with_charts is passed false then only samples and xaxis are included



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# File 'app/models/chart_set.rb', line 26

def as_hash( options = {:with_charts => true} )
  samples_mapped = nil
  if @samples
    samples_mapped = @samples.map do |r|
      Hash[(Chart.value_methods(@charts) << @xaxis[:method]).map { |v| [v, r.send(v)] }]
    end
  end
  # fill in xaxis range if not supplied
  xaxis = @xaxis
  xaxis_method = xaxis[:method]
  if @samples && @samples.length > 0
    if xaxis[:mode] == "time"    # may be nil if none provided
      # if min and max have been provided by chart they must be scaled accordingly
      xaxis[:min] ||= @samples.first.send(xaxis_method)
      xaxis[:min] = xaxis[:min].to_i*1000
      xaxis[:max] ||= @samples.last.send(xaxis_method)
      xaxis[:max] = xaxis[:max].to_i*1000
    else
      xaxis[:min] ||= @samples.first.send(xaxis_method)
      xaxis[:max] ||= @samples.last.send(xaxis_method)
    end
  end
  hash = {:samples => samples_mapped, :xaxis => xaxis }
  if options[:with_charts] != false
    # add the chart definitions if required
    hash[:charts] = @charts.map {|c| c.as_hash }
  end
  hash
end