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python-escpos/examples/software_barcode.py

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add magic coding comment
2018-05-16 00:02:35 +00:00
# -*- coding: utf-8 -*-
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.
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from escpos.printer import Usb
PEP8 software barcode example
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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.
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# Adapt to your needs
remove bad quotes
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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.
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# Some software barcodes
p.soft_barcode('code128', 'Hello')
PEP8 software barcode example
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p.soft_barcode('code39', '123456')