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"Print Inverted" Feature #24

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"Print Inverted" Feature #24

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a561326
added print_inverted feature
mikelyndersOKCC Jul 2, 2020
e8c8df1
removed auto formatting
mikelyndersOKCC Jul 2, 2020
e970ce5
Added newline
mikelynders Jul 2, 2020
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14 changes: 5 additions & 9 deletions zpl/label.py
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Original file line number Diff line number Diff line change
Expand Up @@ -20,23 +20,25 @@
class Label:
'''
Used to build a ZPL2 label.

all dimensions are given in millimeters and automatically converted to
printer dot units.
'''

def __init__(self, height, width=110.0, dpmm=12.0):
def __init__(self, height, width=110.0, dpmm=12.0, print_inverted=False):
"""
Creates one (or more) ZPL2 labels.

*height* and *width* are given in millimeters
*dpmm* refers to dots per millimeter (e.g. 12 for 300dpi)
*print_inverted* rotates the label format by 180 degrees such that the label appears to be printed upside down
"""
self.height = height
self.width = width
self.dpmm = dpmm

self.code = "^XA"
if print_inverted:
self.code += "^POI"

def labelhome(self, x, y, justification=None):
"""
Expand Down Expand Up @@ -74,7 +76,6 @@ def set_darkness(self, value):
def textblock(self, width, justification='C', lines=1):
"""
new text block

width of textblock in millimeters
"""
assert justification in ['L','R','C','J']
Expand All @@ -101,7 +102,6 @@ def write_text(self, text, char_height=None, char_width=None, font='0', orientat
def set_default_font(self, height, width, font='0'):
"""
sets default font from here onward

height and width are given in milimeters
"""
assert re.match(r'[A-Z0-9]', font), "invalid font"
Expand All @@ -111,7 +111,6 @@ def change_international_font(self, character_set=28, remaps=[]):
"""
change the international font/encoding, that enables you to call
up the international character set you want to use for printing

"remaps" arg is a list of tuples with the number of the source
character and the substitute character destination.
"""
Expand All @@ -131,9 +130,7 @@ def change_international_font(self, character_set=28, remaps=[]):
def _convert_image(self, image, width, height, compression_type='A'):
'''
converts *image* (of type PIL.Image) to a ZPL2 format

compression_type can be one of ['A', 'B', 'C']

returns data
'''
image = image.resize((int(width*self.dpmm), int(height*self.dpmm)))
Expand Down Expand Up @@ -170,7 +167,6 @@ def upload_graphic(self, name, image, width, height=0):
def write_graphic(self, image, width, height=0, compression_type="A"):
"""
embeddes image with given width

image has to be of type PIL.Image
if height is not given, it will be chosen proportionally
"""
Expand Down Expand Up @@ -301,7 +297,6 @@ def saveFormat(self, name):
def preview(self, index=0):
'''
Opens rendered preview using Labelary API.

Not all commands are supported, see http://labelary.com for more information.
'''
try:
Expand Down Expand Up @@ -352,3 +347,4 @@ def __main__():

if __name__ == "__main__":
__main__()