Class: Prawn::SwissQRBill::Sections::QRCode

Inherits:
Section
  • Object
show all
Defined in:
lib/prawn/swiss_qr_bill/sections/qr_code.rb

Overview

QR code section

The swiss cross is applied directly on the QR PNG. The PNG needs to be resized down, that the swiss cross overlaps exactly 9x9 modules for a QR-code of compression level :m.

swiss_cross.png => 166px ~> 7.mm QR-code: 1090px <~ 46.mm

Constant Summary collapse

KEY = 
'payment.qr_code'
QR_PX_SIZE = 
1160
SWISS_CROSS_FILE = 
File.expand_path("#{__dir__}/../../../../assets/images/swiss_cross.png")
MAPPING = 
{
  creditor_address_type: i[creditor address type],
  creditor_address_name: i[creditor address name],
  creditor_address_line1: i[creditor address line1],
  creditor_address_line2: i[creditor address line2],
  creditor_address_postal_code: i[creditor address postal_code],
  creditor_address_city: i[creditor address city],
  creditor_address_country: i[creditor address country],
  debtor_address_type: i[debtor address type],
  debtor_address_name: i[debtor address name],
  debtor_address_line1: i[debtor address line1],
  debtor_address_line2: i[debtor address line2],
  debtor_address_postal_code: i[debtor address postal_code],
  debtor_address_city: i[debtor address city],
  debtor_address_country: i[debtor address country],
  amount: [:amount],
  currency: [:currency],
  reference: [:reference],
  reference_type: [:reference_type]
}.freeze

Instance Attribute Summary

Attributes inherited from Section

#doc, #specs

Instance Method Summary collapse

Methods inherited from Section

#initialize

Constructor Details

This class inherits a constructor from Prawn::SwissQRBill::Sections::Section

Instance Method Details

#draw ⇒ Object 



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# File 'lib/prawn/swiss_qr_bill/sections/qr_code.rb', line 42

def draw
  png = qr_as_png(@data)
  add_swiss_cross!(png)

  io = StringIO.new(png.to_blob)

  box do
    doc.image io, width: specs.width
  end
end