Class: Chart::Bar

Inherits:
Base
  • Object
show all
Defined in:
lib/chart/bar.rb

Instance Attribute Summary

Attributes inherited from Base

#angle, #colors, #data, #extra_fields, #height, #inside, #label_format, #labels, #legend, #line_width, #margins, #multicolor, #object, #plot_area, #plot_top_margin, #position, #radius, #style, #symbols, #width

Instance Method Summary collapse

Methods inherited from Base

#helper, #initialize, #write

Constructor Details

This class inherits a constructor from Chart::Base

Instance Method Details

#generate ⇒ Object 



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# File 'lib/chart/bar.rb', line 8

def generate
  # set the plot area
  @object.setPlotArea(@margins[0], @margins[1], @plot_area[0], @plot_area[1], 0xe9e9e9, 0xf5f5f5)
  
  # set the legend position
  @object.addLegend(@margins[0], 0, false, "normal", 8).setBackground(ChartDirector::Transparent)
  
  # set the top margin
  @object.yAxis.setTopMargin(@plot_top_margin)
  
  # set the labels
  @object.xAxis.setLabels(@labels)
  
  # set extra fields
  add_extra_fields
  
  # add data to layer
  if @multicolor
    layer = @object.addBarLayer3(@data, @colors, @legend, 0)
  else
    layer = @object.addBarLayer(@data, @colors.first)
  end

  # set label over bars
  unless @label_format.nil?
    if @inside
      layer.setDataLabelFormat(@label_format)
      layer.setDataLabelStyle("normal", 8, 0x000000, @angle)
    else
      layer.setAggregateLabelFormat(@label_format)
      layer.setAggregateLabelStyle("normal", 8, 0x00000, @angle)
    end
  end
end

#instantiate ⇒ Object 



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# File 'lib/chart/bar.rb', line 3

def instantiate
  # instantiate a new chart
  @object = ChartDirector::XYChart.new(@width, @height) if @width && @height
end