Class: Booky::Layout::Base::Charts::Bar

Inherits:
Base show all
Includes:
Helpers
Defined in:
lib/booky/layout/base/charts/bar.rb

Constant Summary

Constants inherited from Base

Booky::Layout::Base::Charts::Base::COLORS, Booky::Layout::Base::Charts::Base::OPTIONS

Instance Attribute Summary

Attributes inherited from Element

#ast, #document, #index, #options

Instance Method Summary collapse

Methods included from Helpers

#add_to_toc, #is_first_rendering?, #update_levels

Methods inherited from Base

#calculate_dimensions, #color, #create_heading, #data_color, #draw_with_color, #initialize, #next_data_color, #start_new_page_if_needed

Methods inherited from Element

#initialize, #method_missing, #next_option, #previous_option

Constructor Details

This class inherits a constructor from Booky::Layout::Base::Charts::Base

Dynamic Method Handling

This class handles dynamic methods through the method_missing method in the class Booky::Layout::Element

Instance Method Details

#create_background ⇒ Object 



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# File 'lib/booky/layout/base/charts/bar.rb', line 6

def create_background
  draw_with_color :background do
    fill_rectangle [0, cursor], bounds.width, @height
  end
end

#create_bars ⇒ Object 



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# File 'lib/booky/layout/base/charts/bar.rb', line 115

def create_bars
  return if @data['bars'].nil?
  
  bar_height = (@height - 0.5.cm) / @data['bars'].size
  
  bars = @data['bars']
  bars.sort! { |x,y| y['width'] <=> x['width'] } if @data['sort'] == "ASC"
  bars.sort! { |x,y| x['width'] <=> y['width'] } if @data['sort'] == "DESC"
  
  bars.each_with_index do |bar, index|
    draw_with_color(data_color(index)) do
      
      x, y    = map_point([bar['width'], 0])
      width   = x
      height  = 0.6.cm
      x       = @left
      y       = @top - ((index * bar_height) + ((bar_height - height) / 2))
      
      fill_rectangle [x, y], width, height
      
      name = bar['width'].to_s
      x, y2   = map_point([bar['width'], 0])
      x += 0.2.cm
      y -= 0.2.cm
      draw_with_color :default do
        text_box name, :at => [x, y], :width => @width, :size => 8, :style => :italic, :align => :left
      end
    
    end
  end
  self.line_width = 1
end

#create_grid ⇒ Object 



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# File 'lib/booky/layout/base/charts/bar.rb', line 12

def create_grid
  draw_with_color :grid do
    
    x_steps         = @data['grid_x_steps']     || 10
    y_steps         = @data['grid_y_steps']     || 8
    x_sub_steps     = @data['grid_x_sub_steps'] || 10
    y_sub_steps     = @data['grid_y_sub_steps'] || 10
    
    x_step_size     = (@width / x_steps).to_f
    y_step_size     = (@height / y_steps).to_f
    x_sub_step_size = x_step_size / x_sub_steps
    y_sub_step_size = y_step_size / y_sub_steps
    
    # X Sublines
    self.line_width = 0.5
    (x_steps * x_sub_steps).times do |sub_step|
      stroke_vertical_line @top, @bottom, :at => (@left + (sub_step * x_sub_step_size))
    end
    
    # X Mainlines
    x_steps += 1
    self.line_width = 1
    x_steps.times do |step|
      stroke_vertical_line @top, @bottom, :at => (@left + (step * x_step_size))
    end
    
    # Y Sublines
    self.line_width = 0.5
    (y_steps * y_sub_steps).times do |sub_step|
      stroke_horizontal_line @left, @right, :at => (@top - (sub_step * y_sub_step_size))
    end
    
    # Y Mainlines
    y_steps += 1
    self.line_width = 1
    y_steps.times do |step|
      stroke_horizontal_line @left, @right, :at => (@top - (step * y_step_size))
    end
    
  end
end

#create_labels ⇒ Object 



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# File 'lib/booky/layout/base/charts/bar.rb', line 54

def create_labels
  
  # X Labels
  if @data['labels_x']
    @data['labels_x'].each do |label|
      name  = label.last.to_s
      x     = map_point([label.first,0]).first
      y     = @bottom + 0.45.cm
    
      draw_with_color :default do
        text_box name, :at => [x - 50, y], :width => 100, :align => :center, :size => 8, :style => :italic
      end
    end
  end
  
  # X Axis Labels
  if @data['label_x_axis']
    name  = @data['label_x_axis']
    x     = @right - 0.2.cm
    y     = @bottom + 0.5.cm
    
    draw_with_color :label do
      text_box name, :at => [x - @width, y], :width => @width, :size => 10, :style => :italic, :align => :right
    end
  end
  
end

#create_legend ⇒ Object 



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# File 'lib/booky/layout/base/charts/bar.rb', line 82

def create_legend
  legend_width = @width / @data['bars'].size
  
  @data['bars'].each_with_index do |bar, index|
    draw_with_color(data_color(index)) do
      name = bar['name']
      x = index * legend_width
      y = @bottom - 0.1.cm
      
      fill_rectangle [x, @bottom], legend_width, 0.5.cm
      
      draw_with_color :background do
        text_box name, :at => [x, y], :width => legend_width, :size => 10, :align => :center
      end
    end
  end
end

#map_point(point) ⇒ Object 



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# File 'lib/booky/layout/base/charts/bar.rb', line 100

def map_point(point)
  x, y    = point
  min_x   = @data['min_x'] || 0
  min_y   = @data['min_y'] || 0
  max_x   = @data['max_x'] || 0
  max_y   = @data['max_y'] || 0
  width   = min_x.abs + max_x.abs
  height  = min_y.abs + max_y.abs
  
  factor_width  = @width / width
  factor_height = @height / height
  
  [(x * factor_width) + @left, (y * factor_height) + @bottom]
end

#move_to_end ⇒ Object 



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# File 'lib/booky/layout/base/charts/bar.rb', line 148

def move_to_end
  move_cursor_to @bottom - 0.5.cm
end

#to_prawn ⇒ Object 



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# File 'lib/booky/layout/base/charts/bar.rb', line 152

def to_prawn
  create_background
  create_grid
  create_labels
  create_bars
  create_legend
  
  move_to_end
end