Class: Scruffy::Layers::Line

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

Overview

Scruffy::Layers::Line

Author

Brasten Sager

Date

August 7th, 2006

Line graph.

Instance Attribute Summary

Attributes inherited from Base

#color, #complexity, #height, #max_value, #min_value, #opacity, #options, #points, #preferred_color, #relevant_data, #title, #width

Instance Method Summary (collapse)

Methods inherited from Base

#bottom_value, #initialize, #legend_data, #relevant_data?, #render, #sum_values, #top_value

Constructor Details

This class inherits a constructor from Scruffy::Layers::Base

Instance Method Details

- (Object) draw(svg, coords, options = {})

Renders line graph.

Options: See initialize()



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# File 'lib/scruffy/layers/line.rb', line 14

def draw(svg, coords, options={})
  
  # Include options provided when the object was created
  options.merge!(@options)
  
  stroke_width = (options[:relativestroke]) ? relative(options[:stroke_width]) : options[:stroke_width]
  style = (options[:style]) ? options[:style] : ''
  
  if options[:shadow]
    svg.g(:class => 'shadow', :transform => "translate(#{relative(0.5)}, #{relative(0.5)})") {
      svg.polyline( :points => stringify_coords(coords).join(' '), :fill => 'transparent', 
                    :stroke => 'black', 'stroke-width' => stroke_width, 
                    :style => 'fill-opacity: 0; stroke-opacity: 0.35' )
      
      if options[:dots]
        coords.each { |coord| svg.circle( :cx => coord.first, :cy => coord.last + relative(0.9), :r => stroke_width, 
                                          :style => "stroke-width: #{stroke_width}; stroke: black; opacity: 0.35;" ) }
      end
    }
  end


  svg.polyline( :points => stringify_coords(coords).join(' '), :fill => 'none', :stroke => @color.to_s, 
                'stroke-width' => stroke_width, :style => style  )
  
  if options[:dots]
    coords.each { |coord| svg.circle( :cx => coord.first, :cy => coord.last, :r => stroke_width, 
                                      :style => "stroke-width: #{stroke_width}; stroke: #{color.to_s}; fill: #{color.to_s}" ) }
  end
  
end