Enhancement Request: QR-Code Size

[mozdi]

Currently the QR-Code is too small for my screen and I would be happy if I could change the size with a variable.

I have not testet it, but I think that could be done very easy by setting version to a higher number (int between 1 and 40).

The version parameter is an integer from 1 to 40 that controls the size of
the QR Code (the smallest, version 1, is a 21x21 matrix). (https://pypi.org/project/qrcode/)

Thanks and regards,
Mozdi

[mozdi]

I had a deeper look into the file "pibooth_qrcode.py".
The following changes are required to add the ability to change the QR-Code size in the config file:

1. Add the following in the part "def pibooth_configure(cfg):"
   cfg.add_option(SECTION, 'size', "4", "Size of QR code", "Size", "4")

2. Change qr = qrcode.QRCode(version=1[...] in "def state_processing_exit(cfg, app):"
   from
   qr = qrcode.QRCode(version=1, error_correction=qrcode.constants.ERROR_CORRECT_L, box_size=8, border=4)
   to
   qr = qrcode.QRCode(version=1, error_correction=qrcode.constants.ERROR_CORRECT_L, box_size=cfg.gettyped("QRCODE", 'size'), border=4)

3. Add "[QRCODE][size] in pibooth.cfg-file:
   # Size of QR Code (e.g. size=4)
size = 4

I would be happy, if you could implement it into your plugin.

Thanks and regards

[BramWerbrouck]

@mozdi: I already installed this QRcode plugin and want to change the size of the qrcode. Where can I find the right file on my RPI to adjust the code like you suggest?

EDIT: never mind: I just found it here: /home/pi/.local/lib/python3.9/site-packages/pibooth_qrcode.py

[mozdi]

@BramWerbrouck: I suggested to change it in the repository, but unfortunately my pull request didn´t get enough attention.
Does the change work for you as expected?

[BramWerbrouck]

@mozdi yes everythng works as expected

I did another small modification and added:

SIZES = ['2','3','4','5','6']

and changed in def pibooth_configure(cfg):
cfg.add_option(SECTION, 'size', "4", "Size of QR code", "Size", "4")
to
cfg.add_option(SECTION, 'size', "4", "Size of QR code {}".format(', '.join(SIZES)), "Size",SIZES)

I am also looking to change the text size depending on the QRcode-size, will be continued...