# encoding: utf-8
# 
# Kerning is the process of adjusting the spacing between characters in a
# proportional font. It is usually done with specific letter pairs. We can
# switch it on and off if it is available with the current font. Just pass a
# boolean value to the <code>:kerning</code> option of the text methods.
#
# Character Spacing is the space between characters. It can be increased or
# decreased and will have effect on the whole text. Just pass a number to the
# <code>:character_spacing</code> option from the text methods.
#
require File.expand_path(File.join(File.dirname(__FILE__),
                                   %w[.. example_helper]))

filename = File.basename(__FILE__).gsub('.rb', '.pdf')
Prawn::Example.generate(filename) do
  font_size(30) do
    text_box "With kerning:",    :kerning => true,  :at => [0, y - 40]
    text_box "Without kerning:", :kerning => false, :at => [0, y - 80]
    
    text_box "Tomato", :kerning => true,  :at => [250, y - 40]
    text_box "Tomato", :kerning => false, :at => [250, y - 80]
    
    text_box "WAR", :kerning => true,  :at => [400, y - 40]
    text_box "WAR", :kerning => false, :at => [400, y - 80]
    
    text_box "F.", :kerning => true,  :at => [500, y - 40]
    text_box "F.", :kerning => false, :at => [500, y - 80]
  end
  
  move_down 80
  
  string = "What have you done to the space between the characters?"
  [-2, -1, 0, 0.5, 1, 2].each do |spacing|
    move_down 20
    text "#{string} (character_spacing: #{spacing})",
         :character_spacing => spacing
  end
end
