Class: Tuftify::GraphAreaPanel

Inherits:
Panel
  • Object
show all
Defined in:
lib/tuftify/graph_area_panel.rb

Instance Attribute Summary

Attributes inherited from Panel

#canvas, #height, #width, #x, #y

Instance Method Summary collapse

Constructor Details

#initialize(data, x_orig, y_orig, width, height, canvas, options) ⇒ GraphAreaPanel

Returns a new instance of GraphAreaPanel.



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# File 'lib/tuftify/graph_area_panel.rb', line 5

def initialize(data, x_orig, y_orig, width, height, canvas, options)
  super x_orig, y_orig, width, height, canvas, options
  @data = data
end

Instance Method Details

#draw ⇒ Object 



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

def draw
  max_value = @data.collect {|v| v[1]}.max
  scaling = @height.to_f / max_value
  barwidth = @width / @data.length
  x = @x

  
  @data.each do |key, value|
    h = scaling * value
    @drawing.fill(@options[:fill])
    @drawing.stroke(@options[:stroke])
    @drawing.rectangle(x, @y + @height, x + barwidth, @y + @height - h)
    x += barwidth
  end
  @drawing.draw @canvas

#      @drawing.stroke("red")
#      @drawing.stroke_width(3)
#      @drawing.line(@x,@y + @height,@width,@y + @height)
#      @drawing.draw @canvas
end