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Add support for signature on brother printers

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n07070
2026-11-13 02:45:11 +01:00
parent 0a6431eecf
commit e2eb3d3825
5 changed files with 141 additions and 100 deletions
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37
src/printers.py
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@@ -49,10 +49,7 @@ class Printers:
# Find all connected USB devices
# the find() fnc returns a generator
devices = list(
usb.core.find(
find_all=True,
custom_match=_FindClass(self.app,7)
)
usb.core.find(find_all=True, custom_match=_FindClass(self.app, 7))
)
if devices:
@@ -60,15 +57,15 @@ class Printers:
if waiting_time_for_printer <= 0:
self.app.logger.warning(
"No USB devices of class 7 ( printers ) found or pyusb could not access the bus."
"No USB devices of class 7 ( printers ) found or pyusb could not access the bus."
)
raise RuntimeError(
"No USB devices of class 7 ( printers ) found or pyusb could not access the bus."
"No USB devices of class 7 ( printers ) found or pyusb could not access the bus."
)
self.app.logger.warning(
"No printers found; waiting for a printer to connect..."
)
)
time.sleep(1)
waiting_time_for_printer -= 1
@@ -120,10 +117,12 @@ class Printers:
self.app.logger.debug("Trying to create a new BROTHER printer")
brother_printer = BrotherPrinter(
self.app, vendor_id=dev.idVendor, device_id=dev.idProduct)
self.app, vendor_id=dev.idVendor, device_id=dev.idProduct
)
except Exception as e:
self.app.logger.error(
"Could not create a %s printer class with %s:%s" , product,
"Could not create a %s printer class with %s:%s",
product,
dev.idVendor,
dev.idProduct,
)
@@ -131,12 +130,14 @@ class Printers:
# If the object creation is successfull, we add it to the list of Printers
printers.add(brother_printer)
self.app.logger.debug("Found a %s printer" , manufacturer)
self.app.logger.debug("Found a %s printer", manufacturer)
self.app.logger.debug("Found %s printers" , len(printers))
self.app.logger.debug("Found %s printers", len(printers))
if len(printers) < 1:
self.app.logger.warning("Not printers found ! Please plug in a Printer and restart the program.")
self.app.logger.warning(
"Not printers found ! Please plug in a Printer and restart the program."
)
raise RuntimeError("No printers found")
return printers
@@ -163,26 +164,32 @@ class Printers:
"""Return the current list of printers"""
return self.printers
class _FindClass:
"""
Use by usb.core to modify the way USB devices are found
Taken from pyUSB documentation on Github
"""
def __init__(self, app, class_):
self._class = class_
self.app = app
def __call__(self, device):
# first, let's check the device
self.app.logger.debug("Found a USB device of class %s", str(device.bDeviceClass))
self.app.logger.debug(
"Found a USB device of class %s", str(device.bDeviceClass)
)
if device.bDeviceClass == self._class:
return True
# ok, transverse all devices to find an
# interface that matches our class
for configuration in device:
# Every device can have one or more configuration,
interface = usb.util.find_descriptor(configuration, bInterfaceClass=self._class)
# each config can have several interfaces
interface = usb.util.find_descriptor(
configuration, bInterfaceClass=self._class
)
# each config can have several interfaces
if interface is not None:
return True