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, #outline, #points, #preferred_color, #preferred_outline, #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.



11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
 
# 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