Class: Booky::Layout::Base::Charts::Line

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

Constant Summary

Constants inherited from Base

Base::COLORS, 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/line.rb', line 6

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

#create_grid ⇒ Object 



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

def create_labels
  
  # X Labels
  @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
  
  # Y Labels
  @data['labels_y'].each do |label|
    name  = label.last.to_s
    y     = map_point([0, label.first]).last + 0.12.cm
    x     = @left + 0.2.cm
    
    draw_with_color :default do
      text_box name, :at => [x, y], :width => 100, :size => 8, :style => :italic
    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
  
  # Y Axis Labels
  if @data['label_y_axis']
    name  = @data['label_y_axis']
    x     = @left + 0.2.cm
    y     = @top - 0.2.cm
    
    draw_with_color :label do
      text_box name, :at => [x, y], :width => @width, :size => 10, :style => :italic, :align => :left
    end
  end
end

#create_legend ⇒ Object 



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# File 'lib/booky/layout/base/charts/line.rb', line 101

def create_legend
  legend_width = @width / @data['lines'].size
  
  @data['lines'].each_with_index do |line, index|
    draw_with_color(data_color(index)) do
      name = line['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

#create_lines ⇒ Object 



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# File 'lib/booky/layout/base/charts/line.rb', line 209

def create_lines
  return if @data['lines'].nil?
  
  self.line_width = 1
  @data['lines'].each_with_index do |line, index|
    draw_with_color(data_color(index)) do
      
      x, y = map_point(line['points'].first)
      move_to x, y
      
      stroke do
        line['points'].each do |point|
          x, y = map_point(point)
          line_to x, y
        end
      end
    
    end
  end
  self.line_width = 1
end

#create_markers ⇒ Object 



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# File 'lib/booky/layout/base/charts/line.rb', line 157

def create_markers
  return if @data['lines'].nil?
  
  dash(0.1.cm, :space => 0.1.cm, :phase => 0)
  
  # Horizontal Markers
  unless @data['markers_x'].nil?
    
    self.line_width = 0.1
    @data['markers_x'].each_with_index do |marker, index|
      draw_with_color(data_color(index)) do
        
        name = marker['name']
        x, y = map_point([0, marker['y']])
        stroke_line [@left, y], [@right, y]
        y += 0.35.cm
        x = @left + 0.1.cm
        
        text_box name, :at => [x, y], :width => @width, :size => 8, :style => :italic, :align => :left
        
      end
    end
    self.line_width = 1
    
  end
  
  # Verticla Markers
  unless @data['markers_y'].nil?
    
    self.line_width = 0.1
    @data['markers_y'].each_with_index do |marker, index|
      draw_with_color(data_color(index)) do
        
        name = marker['name']
        x, y = map_point([marker['x'], 0])
        stroke_line [x, @top], [x, @bottom]
        x += 0.35.cm
        y = @top - 1.cm
        
        rotate(-90, :origin => [x, y]) do
          text_box name, :at => [x, y], :width => @width, :size => 8, :style => :italic, :align => :left
        end
      end
    end
    self.line_width = 1
    
  end
  
  undash
  
end

#create_points ⇒ Object 



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# File 'lib/booky/layout/base/charts/line.rb', line 134

def create_points
  return if @data['points'].nil?
  
  self.line_width = 1
  @data['points'].each_with_index do |point, index|
    draw_with_color(data_color(index)) do
      
      name = point['name']
      x, y = map_point(point['point'])
      fill_circle [x, y], 3
      
      x -= @width / 2
      y += 0.5.cm
      
      draw_with_color :default do
        text_box name, :at => [x, y], :width => @width, :size => 8, :style => :italic, :align => :center
      end
    
    end
  end
  self.line_width = 1
end

#map_point(point) ⇒ Object 



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# File 'lib/booky/layout/base/charts/line.rb', line 119

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/line.rb', line 231

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/line.rb', line 235

def to_prawn
  create_background
  create_grid
  create_markers
  create_lines
  create_points
  create_labels
  create_legend
  
  move_to_end
end