Class: Tuftify::GraphLayer

Inherits:
Object
  • Object
show all
Includes:
Magick
Defined in:
lib/tuftify/graph_layer.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(data, details, options = {}) ⇒ GraphLayer

Returns a new instance of GraphLayer.



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# File 'lib/tuftify/graph_layer.rb', line 12

def initialize(data, details, options = {})
  @options = {:title => 'Graph',
    :font_family =>'Helvetica',
    :fill => 'black',
    :pointsize => 12,
    :title_pointsize => 18,
    :categories_pointsize => 12,
    :gravity => NorthGravity,
    :stroke => 'white'
  }
  @height = details[:height]
  @width = details[:width]
  @options = @options.merge options
  @data = data.collect {|i| [i[0], i[1].to_f]}
  @panels = {}
  title = Tuftify::TitlePanel.new(@options.delete(:title), @options[:title_pointsize], details, @options)
  @panels[:title] = title
  barwidth = @width / @data.length
  categories = []
  categories = @data.collect { |value| value[0].to_s} if @options[:categories].nil?
  categories = @options[:categories] unless @options[:categories].nil?

  @panels[:category_axis] = Tuftify::CategoryAxis.new(categories,0,
    @options[:categories_pointsize],details,barwidth,@options)

  @height_graph = @height - (title.height + @panels[:category_axis].height)
  
  @panels[:graph_area] = Tuftify::GraphAreaPanel.new(data, 0, title.height,
    @width, @height_graph, details[:canvas], @options)
 

end

Instance Attribute Details

#height ⇒ Object

Returns the value of attribute height.



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# File 'lib/tuftify/graph_layer.rb', line 10

def height
  @height
end

#options ⇒ Object

Returns the value of attribute options.



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# File 'lib/tuftify/graph_layer.rb', line 9

def options
  @options
end

#width ⇒ Object

Returns the value of attribute width.



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# File 'lib/tuftify/graph_layer.rb', line 10

def width
  @width
end

Instance Method Details

#draw ⇒ Object 



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# File 'lib/tuftify/graph_layer.rb', line 45

def draw
  @panels[:title].draw
  @panels[:graph_area].draw
  @panels[:category_axis].draw
end