python-escpos/examples/software_barcode.py

from __future__ import absolute_import
from __future__ import division
from __future__ import print_function
from __future__ import unicode_literals

from escpos.printer import Usb


# Adapt to your needs
p = Usb(0x0416, 0x5011, profile='POS-5890')

# Some software barcodes
p.soft_barcode('code128', 'Hello')
p.soft_barcode('code39', '123456')
cleanup imports, first part 2018-05-15 23:23:04 +00:00			`from __future__ import absolute_import`
			`from __future__ import division`
			`from __future__ import print_function`
			`from __future__ import unicode_literals`

First implementation of software barcode Actually the hardware barcode implementation is very specific and not generic enough for just adding a `soft_render=True` argument to it. This is a first work that can be improved with other commits, maybe for merging this method in the `barcode` method after some cleanup. The width, height and text_distance were set using empiric print-and-retry tests so that the generated barcode looks nice to the eye (and to the eye of an Android scanner tool. !WARNING! Printing a barcode that is too large in width will result in the printer to go crazy trying to print an image that is too large for it. This may be fixed by raising an exception in the `image` method. 2017-05-16 18:55:30 +00:00			`from escpos.printer import Usb`

PEP8 software barcode example 2017-05-22 18:25:51 +00:00
First implementation of software barcode Actually the hardware barcode implementation is very specific and not generic enough for just adding a `soft_render=True` argument to it. This is a first work that can be improved with other commits, maybe for merging this method in the `barcode` method after some cleanup. The width, height and text_distance were set using empiric print-and-retry tests so that the generated barcode looks nice to the eye (and to the eye of an Android scanner tool. !WARNING! Printing a barcode that is too large in width will result in the printer to go crazy trying to print an image that is too large for it. This may be fixed by raising an exception in the `image` method. 2017-05-16 18:55:30 +00:00			`# Adapt to your needs`
remove bad quotes 2018-05-15 23:09:48 +00:00			`p = Usb(0x0416, 0x5011, profile='POS-5890')`
First implementation of software barcode Actually the hardware barcode implementation is very specific and not generic enough for just adding a `soft_render=True` argument to it. This is a first work that can be improved with other commits, maybe for merging this method in the `barcode` method after some cleanup. The width, height and text_distance were set using empiric print-and-retry tests so that the generated barcode looks nice to the eye (and to the eye of an Android scanner tool. !WARNING! Printing a barcode that is too large in width will result in the printer to go crazy trying to print an image that is too large for it. This may be fixed by raising an exception in the `image` method. 2017-05-16 18:55:30 +00:00
			`# Some software barcodes`
			`p.soft_barcode('code128', 'Hello')`
PEP8 software barcode example 2017-05-22 18:25:51 +00:00			`p.soft_barcode('code39', '123456')`