ryanlecompte · August 13, 2012 17:34
diff --git a/gistfile1.rb b/gistfile1.rb
 require 'google_visualr'

 class ChartBuilder
  # Creates a new builder instance.
  def initialize(name, options = {})
    @name = name
    @columns = options.fetch(:columns) { raise 'No columns defined' }
    @chart = options.fetch(:chart) { raise 'No chart class defined' }
    @chart_options = {:name => @name}.merge(options.fetch(:chart_options, {}))
    @rows = []
  end

  # Adds a new row to the builder.
  def add(row)
    @rows << row
  end
  alias_method :<<, :add

  # Builds an HTML chart.
  def build
    <<-HTML
      <!doctype html>
      <html lang="en">
      <head>
        <script src="http://www.google.com/jsapi"></script>
        #{build_chart}
        <meta charset="utf-8">
        <title>#{@name}</title>
      </head>
      <body>
        <div id="chart"></div>
      </body>
      </html>
    HTML
  end

  private

  def build_chart
    table = GoogleVisualr::DataTable.new
    # setup columns
    @columns.each do |column|
      table.new_column(*column)
    end

    # setup rows
    table.add_rows(@rows.size)
    @rows.each_with_index do |row, row_index|
      @columns.size.times do |col_index|
        table.set_cell(row_index, col_index, row[col_index])
      end
    end

    chart = @chart.new(table, @chart_options)
    chart.to_js('chart')
  end
 end

 if __FILE__ == $0
  options = {
    :chart => GoogleVisualr::Interactive::AreaChart,
    :chart_options => {:width => 800, :height => 440},
    :columns => [
      ['string', 'Year'],
      ['number', 'Sales'],
      ['number', 'Expenses']
    ]
  }

  chart_builder = ChartBuilder.new('Company Performance', options)
  [
    ['2004', 1000, 400],
    ['2005', 1170, 460],
    ['2006', 660, 1120],
    ['2007', 1030, 540]
  ].each { |row| chart_builder << row }

  puts chart_builder.build
 end
	require 'google_visualr'

	class ChartBuilder
	# Creates a new builder instance.
	def initialize(name, options = {})
	@name = name
	@columns = options.fetch(:columns) { raise 'No columns defined' }
	@chart = options.fetch(:chart) { raise 'No chart class defined' }
	@chart_options = {:name => @name}.merge(options.fetch(:chart_options, {}))
	@rows = []
	end

	# Adds a new row to the builder.
	def add(row)
	@rows << row
	end
	alias_method :<<, :add

	# Builds an HTML chart.
	def build
	<<-HTML
	<!doctype html>
	<html lang="en">
	<head>
	<script src="http://www.google.com/jsapi"></script>
	#{build_chart}
	<meta charset="utf-8">
	<title>#{@name}</title>
	</head>
	<body>
	<div id="chart"></div>
	</body>
	</html>
	HTML
	end

	private

	def build_chart
	table = GoogleVisualr::DataTable.new
	# setup columns
	@columns.each do \|column\|
	table.new_column(*column)
	end

	# setup rows
	table.add_rows(@rows.size)
	@rows.each_with_index do \|row, row_index\|
	@columns.size.times do \|col_index\|
	table.set_cell(row_index, col_index, row[col_index])
	end
	end

	chart = @chart.new(table, @chart_options)
	chart.to_js('chart')
	end
	end

	if __FILE__ == $0
	options = {
	:chart => GoogleVisualr::Interactive::AreaChart,
	:chart_options => {:width => 800, :height => 440},
	:columns => [
	['string', 'Year'],
	['number', 'Sales'],
	['number', 'Expenses']
	]
	}

	chart_builder = ChartBuilder.new('Company Performance', options)
	[
	['2004', 1000, 400],
	['2005', 1170, 460],
	['2006', 660, 1120],
	['2007', 1030, 540]
	].each { \|row\| chart_builder << row }

	puts chart_builder.build
	end