Class: Geoptima::GruffChart

Inherits:
Chart
  • Object
show all
Defined in:
lib/geoptima/chart.rb

Constant Summary

Constants inherited from Chart

Chart::DEFAULT_OPTIONS

Instance Attribute Summary

Attributes inherited from Chart

#chart_type, #options

Instance Method Summary collapse

Methods inherited from Chart

available?, bar, draw_category_chart, draw_grouped_chart, draw_histogram_chart, draw_line_chart, engine, engine=, libs, line, make_chart

Constructor Details

#initialize(chart_type, options = {}) ⇒ GruffChart

Returns a new instance of GruffChart.



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# File 'lib/geoptima/chart.rb', line 109

def initialize(chart_type,options={})
  super(chart_type,options)
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(symbol, *args, &block) ⇒ Object 



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# File 'lib/geoptima/chart.rb', line 140

def method_missing(symbol,*args,&block)
  chart.send symbol, *args, &block
end

Instance Method Details

#chart ⇒ Object 



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# File 'lib/geoptima/chart.rb', line 112

def chart
  unless @chart
    case chart_type.to_s
    when 'line'
      @chart = Gruff::Line.new(options[:width])
      @chart.hide_dots = !options[:show_points]
      @chart.hide_lines = !options[:show_lines]
    when 'bar'
      @chart = Gruff::Bar.new(options[:width])
    when 'side_bar'
      @chart = Gruff::SideBar.new(options[:width])
    else
      raise "Unsupported chart type: #{chart_type}"
    end
    @chart.title = options[:title]
    @chart.margins = options[:margins]
    @chart.legend_font_size = options[:font_size]
    @chart.marker_font_size = options[:font_size]
    @chart.title_font_size = options[:title_font_size] || 2 * options[:font_size]
  end
  @chart
end

#data(name, values) ⇒ Object 



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# File 'lib/geoptima/chart.rb', line 134

def data(name,values)
  chart.data(name,values)
end

#labels=(label_map) ⇒ Object 



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# File 'lib/geoptima/chart.rb', line 137

def labels=(label_map)
  chart.labels = label_map
end

#write(filename) ⇒ Object 



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# File 'lib/geoptima/chart.rb', line 143

def write(filename)
  chart.write(filename)
end