Parent

Gruff::Spider

Experimental!!! See also the Net graph.

Submitted by Kevin Clark glu.ttono.us/

Attributes

hide_axes[RW]
hide_text[R]

Hide all text

transparent_background[R]

Public Class Methods

new(max_value, target_width = 800) click to toggle source
# File lib/gruff/spider.rb, line 23
def initialize(max_value, target_width = 800)
  super(target_width)
  @max_value = max_value
  @hide_legend = true;
end

Public Instance Methods

draw() click to toggle source
# File lib/gruff/spider.rb, line 29
def draw
  @hide_line_markers = true
  
  super

  return unless @has_data

  # Setup basic positioning
  diameter = @graph_height
  radius = @graph_height / 2.0
  top_x = @graph_left + (@graph_width - diameter) / 2.0
  center_x = @graph_left + (@graph_width / 2.0)
  center_y = @graph_top + (@graph_height / 2.0) - 25 # Move graph up a bit
  
  @unit_length = radius / @max_value
  
      
  total_sum = sums_for_spider
  prev_degrees = 0.0
  additive_angle = (2 * Math::PI)/ @data.size
  
  current_angle = 0.0

  # Draw axes
  draw_axes(center_x, center_y, radius, additive_angle) unless hide_axes    
  
  # Draw polygon
  draw_polygon(center_x, center_y, additive_angle)
  
   
  @d.draw(@base_image)
end
hide_text=(value) click to toggle source
# File lib/gruff/spider.rb, line 19
def hide_text=(value)
  @hide_title = @hide_text = value
end
transparent_background=(value) click to toggle source
# File lib/gruff/spider.rb, line 14
def transparent_background=(value)
  @transparent_background = value
  @base_image = render_transparent_background if value
end

[Validate]

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