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Added printing requirements
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Tom Price
307
reportlab/graphics/barcode/widgets.py
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307
reportlab/graphics/barcode/widgets.py
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#copyright ReportLab Europe Limited. 2000-2012
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#see license.txt for license details
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__version__=''' $Id$ '''
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__all__= (
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'BarcodeI2of5',
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'BarcodeCode128',
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'BarcodeStandard93',
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'BarcodeExtended93',
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'BarcodeStandard39',
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'BarcodeExtended39',
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'BarcodeMSI',
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'BarcodeCodabar',
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'BarcodeCode11',
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'BarcodeFIM',
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'BarcodePOSTNET',
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'BarcodeUSPS_4State',
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)
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from reportlab.lib.validators import isInt, isNumber, isColor, isString, isColorOrNone, OneOf, isBoolean, EitherOr, isNumberOrNone
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from reportlab.lib.attrmap import AttrMap, AttrMapValue
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from reportlab.lib.colors import black
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from reportlab.lib.utils import rl_exec
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from reportlab.graphics.shapes import Line, Rect, Group, NotImplementedError, String
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from reportlab.graphics.charts.areas import PlotArea
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'''
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#snippet
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#first make your Drawing
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from reportlab.graphics.shapes import Drawing
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d= Drawing(100,50)
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#create and set up the widget
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from reportlab.graphics.barcode.widgets import BarcodeStandard93
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bc = BarcodeStandard93()
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bc.value = 'RGB-123456'
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#add to the drawing and save
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d.add(bc)
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# d.save(formats=['gif','pict'],fnRoot='bc_sample')
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'''
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class _BarcodeWidget(PlotArea):
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_attrMap = AttrMap(BASE=PlotArea,
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barStrokeColor = AttrMapValue(isColorOrNone, desc='Color of bar borders.'),
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barFillColor = AttrMapValue(isColorOrNone, desc='Color of bar interior areas.'),
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barStrokeWidth = AttrMapValue(isNumber, desc='Width of bar borders.'),
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value = AttrMapValue(EitherOr((isString,isNumber)), desc='Value.'),
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textColor = AttrMapValue(isColorOrNone, desc='Color of human readable text.'),
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valid = AttrMapValue(isBoolean),
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validated = AttrMapValue(isString,desc="validated form of input"),
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encoded = AttrMapValue(None,desc="encoded form of input"),
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decomposed = AttrMapValue(isString,desc="decomposed form of input"),
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canv = AttrMapValue(None,desc="temporarily used for internal methods"),
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gap = AttrMapValue(isNumberOrNone, desc='Width of inter character gaps.'),
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)
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textColor = barFillColor = black
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barStrokeColor = None
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barStrokeWidth = 0
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_BCC = None
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def __init__(self,_value='',**kw):
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PlotArea.__init__(self)
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del self.__dict__['width']
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del self.__dict__['height']
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self.x = self.y = 0
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kw.setdefault('value',_value)
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self._BCC.__init__(self,**kw)
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def rect(self,x,y,w,h,**kw):
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self._Gadd(Rect(self.x+x,self.y+y,w,h,
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strokeColor=self.barStrokeColor,strokeWidth=self.barStrokeWidth, fillColor=self.barFillColor))
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def draw(self):
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if not self._BCC: raise NotImplementedError("Abstract class %s cannot be drawn" % self.__class__.__name__)
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self.canv = self
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G = Group()
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self._Gadd = G.add
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self._Gadd(Rect(self.x,self.y,self.width,self.height,fillColor=None,strokeColor=None,strokeWidth=0.0001))
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self._BCC.draw(self)
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del self.canv, self._Gadd
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return G
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def annotate(self,x,y,text,fontName,fontSize,anchor='middle'):
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self._Gadd(String(self.x+x,self.y+y,text,fontName=fontName,fontSize=fontSize,
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textAnchor=anchor,fillColor=self.textColor))
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def _BCW(doc,codeName,attrMap,mod,value,**kwds):
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"""factory for Barcode Widgets"""
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_pre_init = kwds.pop('_pre_init','')
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_methods = kwds.pop('_methods','')
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name = 'Barcode'+codeName
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ns = vars().copy()
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code = 'from %s import %s' % (mod,codeName)
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rl_exec(code,ns)
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ns['_BarcodeWidget'] = _BarcodeWidget
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code = '''class %(name)s(_BarcodeWidget,%(codeName)s):
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\t_BCC = %(codeName)s
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\tcodeName = %(codeName)r
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\tdef __init__(self,**kw):%(_pre_init)s
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\t\t_BarcodeWidget.__init__(self,%(value)r,**kw)%(_methods)s''' % ns
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rl_exec(code,ns)
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Klass = ns[name]
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if attrMap: Klass._attrMap = attrMap
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if doc: Klass.__doc__ = doc
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for k, v in kwds.items():
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setattr(Klass,k,v)
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return Klass
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BarcodeI2of5 = _BCW(
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"""Interleaved 2 of 5 is used in distribution and warehouse industries.
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It encodes an even-numbered sequence of numeric digits. There is an optional
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module 10 check digit; if including this, the total length must be odd so that
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it becomes even after including the check digit. Otherwise the length must be
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even. Since the check digit is optional, our library does not check it.
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""",
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"I2of5",
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AttrMap(BASE=_BarcodeWidget,
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barWidth = AttrMapValue(isNumber,'''(float, default .0075):
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X-Dimension, or width of the smallest element
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Minumum is .0075 inch (7.5 mils).'''),
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ratio = AttrMapValue(isNumber,'''(float, default 2.2):
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The ratio of wide elements to narrow elements.
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Must be between 2.0 and 3.0 (or 2.2 and 3.0 if the
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barWidth is greater than 20 mils (.02 inch))'''),
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gap = AttrMapValue(isNumberOrNone,'''(float or None, default None):
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width of intercharacter gap. None means "use barWidth".'''),
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barHeight = AttrMapValue(isNumber,'''(float, see default below):
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Height of the symbol. Default is the height of the two
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bearer bars (if they exist) plus the greater of .25 inch
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or .15 times the symbol's length.'''),
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checksum = AttrMapValue(isBoolean,'''(bool, default 1):
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Whether to compute and include the check digit'''),
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bearers = AttrMapValue(isNumber,'''(float, in units of barWidth. default 3.0):
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Height of bearer bars (horizontal bars along the top and
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bottom of the barcode). Default is 3 x-dimensions.
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Set to zero for no bearer bars. (Bearer bars help detect
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misscans, so it is suggested to leave them on).'''),
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quiet = AttrMapValue(isBoolean,'''(bool, default 1):
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Whether to include quiet zones in the symbol.'''),
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lquiet = AttrMapValue(isNumber,'''(float, see default below):
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Quiet zone size to left of code, if quiet is true.
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Default is the greater of .25 inch, or .15 times the symbol's
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length.'''),
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rquiet = AttrMapValue(isNumber,'''(float, defaults as above):
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Quiet zone size to right left of code, if quiet is true.'''),
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fontName = AttrMapValue(isString, desc='human readable font'),
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fontSize = AttrMapValue(isNumber, desc='human readable font size'),
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humanReadable = AttrMapValue(isBoolean, desc='if human readable'),
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stop = AttrMapValue(isBoolean, desc='if we use start/stop symbols (default 1)'),
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),
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'reportlab.graphics.barcode.common',
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1234,
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_tests = [
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'12',
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'1234',
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'123456',
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'12345678',
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'1234567890'
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],
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)
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BarcodeCode128 = _BCW("""Code 128 encodes any number of characters in the ASCII character set.""",
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"Code128",
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AttrMap(BASE=BarcodeI2of5,UNWANTED=('bearers','checksum','ratio','checksum','stop')),
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'reportlab.graphics.barcode.code128',
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"AB-12345678",
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_tests = ['ReportLab Rocks!', 'PFWZF'],
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)
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BarcodeStandard93=_BCW("""This is a compressed form of Code 39""",
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"Standard93",
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AttrMap(BASE=BarcodeCode128,
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stop = AttrMapValue(isBoolean, desc='if we use start/stop symbols (default 1)'),
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),
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'reportlab.graphics.barcode.code93',
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"CODE 93",
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)
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BarcodeExtended93=_BCW("""This is a compressed form of Code 39, allowing the full ASCII charset""",
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"Extended93",
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AttrMap(BASE=BarcodeCode128,
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stop = AttrMapValue(isBoolean, desc='if we use start/stop symbols (default 1)'),
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),
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'reportlab.graphics.barcode.code93',
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"L@@K! Code 93 ;-)",
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)
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BarcodeStandard39=_BCW("""Code39 is widely used in non-retail, especially US defence and health.
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Allowed characters are 0-9, A-Z (caps only), space, and -.$/+%*.""",
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"Standard39",
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AttrMap(BASE=BarcodeI2of5),
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'reportlab.graphics.barcode.code39',
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"A012345B%R",
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)
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BarcodeExtended39=_BCW("""Extended 39 encodes the full ASCII character set by encoding
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characters as pairs of Code 39 characters; $, /, % and + are used as
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shift characters.""",
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"Extended39",
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AttrMap(BASE=BarcodeI2of5),
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'reportlab.graphics.barcode.code39',
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"A012345B}",
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)
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BarcodeMSI=_BCW("""MSI is used for inventory control in retail applications.
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There are several methods for calculating check digits so we
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do not implement one.
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""",
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"MSI",
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AttrMap(BASE=BarcodeI2of5),
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'reportlab.graphics.barcode.common',
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1234,
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)
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BarcodeCodabar=_BCW("""Used in blood banks, photo labs and FedEx labels.
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Encodes 0-9, -$:/.+, and four start/stop characters A-D.""",
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"Codabar",
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AttrMap(BASE=BarcodeI2of5),
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'reportlab.graphics.barcode.common',
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"A012345B",
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)
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BarcodeCode11=_BCW("""Used mostly for labelling telecommunications equipment.
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It encodes numeric digits.""",
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'Code11',
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AttrMap(BASE=BarcodeI2of5,
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checksum = AttrMapValue(isInt,'''(integer, default 2):
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Whether to compute and include the check digit(s).
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(0 none, 1 1-digit, 2 2-digit, -1 auto, default -1):
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How many checksum digits to include. -1 ("auto") means
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1 if the number of digits is 10 or less, else 2.'''),
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),
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'reportlab.graphics.barcode.common',
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"01234545634563",
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)
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BarcodeFIM=_BCW("""
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FIM was developed as part of the POSTNET barcoding system.
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FIM (Face Identification Marking) is used by the cancelling machines
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to sort mail according to whether or not they have bar code
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and their postage requirements. There are four types of FIM
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called FIM A, FIM B, FIM C, and FIM D.
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The four FIM types have the following meanings:
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FIM A- Postage required pre-barcoded
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FIM B - Postage pre-paid, no bar code exists
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FIM C- Postage prepaid prebarcoded
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FIM D- Postage required, no bar code exists""",
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"FIM",
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AttrMap(BASE=_BarcodeWidget,
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barWidth = AttrMapValue(isNumber,'''(float, default 1/32in): the bar width.'''),
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spaceWidth = AttrMapValue(isNumber,'''(float or None, default 1/16in):
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width of intercharacter gap. None means "use barWidth".'''),
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barHeight = AttrMapValue(isNumber,'''(float, default 5/8in): The bar height.'''),
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quiet = AttrMapValue(isBoolean,'''(bool, default 0):
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Whether to include quiet zones in the symbol.'''),
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lquiet = AttrMapValue(isNumber,'''(float, default: 15/32in):
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Quiet zone size to left of code, if quiet is true.'''),
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rquiet = AttrMapValue(isNumber,'''(float, default 1/4in):
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Quiet zone size to right left of code, if quiet is true.'''),
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fontName = AttrMapValue(isString, desc='human readable font'),
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fontSize = AttrMapValue(isNumber, desc='human readable font size'),
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humanReadable = AttrMapValue(isBoolean, desc='if human readable'),
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),
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'reportlab.graphics.barcode.usps',
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"A",
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)
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BarcodePOSTNET=_BCW('',
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"POSTNET",
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AttrMap(BASE=_BarcodeWidget,
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barWidth = AttrMapValue(isNumber,'''(float, default 0.018*in): the bar width.'''),
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spaceWidth = AttrMapValue(isNumber,'''(float or None, default 0.0275in): width of intercharacter gap.'''),
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shortHeight = AttrMapValue(isNumber,'''(float, default 0.05in): The short bar height.'''),
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barHeight = AttrMapValue(isNumber,'''(float, default 0.125in): The full bar height.'''),
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fontName = AttrMapValue(isString, desc='human readable font'),
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fontSize = AttrMapValue(isNumber, desc='human readable font size'),
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humanReadable = AttrMapValue(isBoolean, desc='if human readable'),
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),
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'reportlab.graphics.barcode.usps',
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"78247-1043",
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)
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BarcodeUSPS_4State=_BCW('',
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"USPS_4State",
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AttrMap(BASE=_BarcodeWidget,
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widthSize = AttrMapValue(isNumber,'''(float, default 1): the bar width size adjustment between 0 and 1.'''),
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heightSize = AttrMapValue(isNumber,'''(float, default 1): the bar height size adjustment between 0 and 1.'''),
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fontName = AttrMapValue(isString, desc='human readable font'),
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fontSize = AttrMapValue(isNumber, desc='human readable font size'),
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tracking = AttrMapValue(isString, desc='tracking data'),
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routing = AttrMapValue(isString, desc='routing data'),
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humanReadable = AttrMapValue(isBoolean, desc='if human readable'),
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),
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'reportlab.graphics.barcode.usps4s',
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'01234567094987654321',
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_pre_init="\n\t\tkw.setdefault('routing','01234567891')\n",
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_methods = "\n\tdef annotate(self,x,y,text,fontName,fontSize,anchor='middle'):\n\t\t_BarcodeWidget.annotate(self,x,y,text,fontName,fontSize,anchor='start')\n"
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)
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if __name__=='__main__':
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raise ValueError('widgets.py has no script function')
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