Class: Scruffy::Layers::Area

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

Overview

Scruffy::Layers::Area

Author

Brasten Sager

Date

August 6th, 2006

Standard area 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_key, #bottom_value, #initialize, #legend_data, #relevant_data?, #render, #sum_values, #top_key, #top_value

Constructor Details

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

Instance Method Details

#draw(svg, coords, options = {}) ⇒ Object

Render area graph.



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# File 'lib/scruffy/layers/area.rb', line 11

def draw(svg, coords, options={})
  # svg.polygon wants a long string of coords. 
  points_value = "0,#{height} #{stringify_coords(coords).join(' ')} #{width},#{height}"

  # Experimental, for later user.
  # This was supposed to add some fun filters, 3d effects and whatnot.
  # Neither ImageMagick nor Mozilla SVG render this well (at all).  Maybe a future thing.
  #
  # svg.defs {
  #   svg.filter(:id => 'MyFilter', :filterUnits => 'userSpaceOnUse', :x => 0, :y => 0, :width => 200, :height => '120') {
  #     svg.feGaussianBlur(:in => 'SourceAlpha', :stdDeviation => 4, :result => 'blur')
  #     svg.feOffset(:in => 'blur', :dx => 4, :dy => 4, :result => 'offsetBlur')
  #     svg.feSpecularLighting( :in => 'blur', :surfaceScale => 5, :specularConstant => '.75',
  #                             :specularExponent => 20, 'lighting-color' => '#bbbbbb',
  #                             :result => 'specOut') {
  #       svg.fePointLight(:x => '-5000', :y => '-10000', :z => '20000')
  #     }
  #     
  #     svg.feComposite(:in => 'specOut', :in2 => 'SourceAlpha', :operator => 'in', :result => 'specOut')
  #     svg.feComposite(:in => 'sourceGraphic', :in2 => 'specOut', :operator => 'arithmetic',
  #                     :k1 => 0, :k2 => 1, :k3 => 1, :k4 => 0, :result => 'litPaint')
  #                     
  #     svg.feMerge {
  #       svg.feMergeNode(:in => 'offsetBlur')
  #       svg.feMergeNode(:in => 'litPaint')
  #     }
  #   }
  # }
  svg.g(:transform => "translate(0, -#{relative(2)})") {
    svg.polygon(:points => points_value, :style => "fill: black; stroke: black; fill-opacity: 0.06; stroke-opacity: 0.06;")
  }

  svg.polygon(:points => points_value, :fill => color.to_s, :stroke => color.to_s, 'style' => "opacity: #{opacity}")
end