import barcode
from barcode.writer import ImageWriter
import win32print
import win32ui
from PIL import Image, ImageWin
print("Using default printer: " + win32print.GetDefaultPrinter())
def print_barcode(number):
EAN = barcode.get_barcode_class('code128')
with open("./lastbarcode.jpg", "wb") as f:
try:
EAN(number, writer=ImageWriter()).write(f)
except Exception as e:
print(str(e))
quit()
#
# Constants for GetDeviceCaps
#
#
# HORZRES / VERTRES = printable area
#
HORZRES = 28313
VERTRES = 28313
#
# LOGPIXELS = dots per inch
#
LOGPIXELSX = 80
LOGPIXELSY = 80
#
# PHYSICALWIDTH/HEIGHT = total area
#
PHYSICALWIDTH = 0
PHYSICALHEIGHT = 0
#
# PHYSICALOFFSETX/Y = left / top margin
#
PHYSICALOFFSETX = 0
PHYSICALOFFSETY = -100
printer_name = win32print.GetDefaultPrinter ()
file_name = "lastbarcode.jpg"
#
# You can only write a Device-independent bitmap
# directly to a Windows device context; therefore
# we need (for ease) to use the Python Imaging
# Library to manipulate the image.
#
# Create a device context from a named printer
# and assess the printable size of the paper.
#
hDC = win32ui.CreateDC ()
hDC.CreatePrinterDC (printer_name)
printable_area = hDC.GetDeviceCaps (HORZRES), hDC.GetDeviceCaps (VERTRES)
printer_size = hDC.GetDeviceCaps (PHYSICALWIDTH), hDC.GetDeviceCaps (PHYSICALHEIGHT)
printer_margins = hDC.GetDeviceCaps (PHYSICALOFFSETX), hDC.GetDeviceCaps (PHYSICALOFFSETY)
#
# Open the image, rotate it if it's wider than
# it is high, and work out how much to multiply
# each pixel by to get it as big as possible on
# the page without distorting.
#
bmp = Image.open (file_name)
bmp = bmp.rotate (90)
ratios = [1.0 * printable_area[0] / bmp.size[0], 1.0 * printable_area[1] / bmp.size[1]]
scale = min (ratios)
scale = 0.5
#
# Start the print job, and draw the bitmap to
# the printer device at the scaled size.
#
hDC.StartDoc (file_name)
hDC.StartPage ()
dib = ImageWin.Dib (bmp)
scaled_width, scaled_height = [int (scale * i) for i in bmp.size]
x1 = int ((printer_size[0] - scaled_width) / 2)
y1 = int ((printer_size[1] - scaled_height) / 2)
x2 = x1 + scaled_width
y2 = y1 + scaled_height
x1 = 200
y1 = 50
dib.draw (hDC.GetHandleOutput (), (x1, y1, x2, y2))
hDC.EndPage ()
hDC.EndDoc ()
hDC.DeleteDC ()
while True:
user_input_num = input("Product ID: ")
if user_input_num != "":
print_barcode(user_input_num.upper())