Class: Chart::Line

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

Constant Summary collapse

LINE_STYLE = 
{
  "dash"      => ChartDirector::DashLine,
  "dot"       => ChartDirector::DotLine,
  "dotdash"   => ChartDirector::DotDashLine,
  "alternate" => ChartDirector::AltDashLine
}
LINE_SYMBOLS = 
{
  "square"   => ChartDirector::SquareSymbol,
  "diamond"  => ChartDirector::DiamondSymbol,
  "triangle" => ChartDirector::TriangleSymbol,
  "circle"   => ChartDirector::CircleSymbol
}

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/line.rb', line 22

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)
  @object.xAxis.setMargin(10, 10)
  
  # set the labels
  @object.xAxis.setLabels(@labels)
  
  # create the layer
  layer = @object.addLineLayer2
  
  # set line width
  layer.setLineWidth(@line_width)
  
  # set label format
  layer.setDataLabelFormat(@label_format) unless label_format.nil?
  
  # add data to layer
  @data.each_with_index do |data, index|        
    # set line style or color
    if @style && LINE_STYLE[@style[index].to_s]
      line_style = @object.dashLineColor(@colors[index], LINE_STYLE[style[index].to_s])
    else
      line_style = @colors[index]
    end
    
    # add dataset
    dataset = layer.addDataSet(data, line_style, legend[index])
    
    # set symbol
    symbol = LINE_SYMBOLS[@symbols[index]]
    
    if symbol
      dataset.setDataSymbol(symbol, 7, -1, @colors[index], 1)
    elsif @symbols[index] && File.file?(@symbols[index])
      dataset.setDataSymbol2(@symbols[index])
    end
  end
end

#instantiate ⇒ Object 



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# File 'lib/chart/line.rb', line 17

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