checkbox_test.pdf

checkbox_test.rb

require 'prawn'

CHECKBOX        = "\xE2\x98\x90" # "☐"
FILLED_CHECKBOX = "\xE2\x98\x91" # "☑"

Prawn::Document.generate("checkbox_test.pdf") do
  # Use a font with the checkbox characters: 
  # http://www.fileformat.info/info/unicode/char/2610/fontsupport.htm
  font "fonts/dejavu/ttf/DejaVuSans.ttf"
  
  text "#{CHECKBOX} Not done yet"
  text "#{FILLED_CHECKBOX} Complete!"
end

def checkbox(flag, x_position = 7, y_position = @pdf.cursor - 2)
  @pdf.bounding_box([x_position, y_position], width: 10, height: 12) do
    @pdf.stroke_bounds
    @pdf.text("X", align: :center, valign: :center) if flag
  end
end

просто сгенерить картинку в курсоре