[reportlab-users] ValueError: redefining named object

[jo]

I see the line that cause this error is this one:
        self.ss['tx'].setFont('OCR', 10)

seems reportlab can performs setFont() only the first time but this happen
only when the font is defined by user.
I wonder if  there's a workaround to avoid this error.

   def  display(self):
        self.ss['tx'] = self.ss['cnvs'].beginText()
        self.ss['eli'] = self.ss['cnvs'].beginPath()
        self.ss['tx'].setFont('OCR', 10)
        self.ss['tx'].setHorizScale(100)
        self.ss['tx'].setTextOrigin(0,0)
        self.ss['tx'].moveCursor(
                (self.ss['borderx'] + (self.ss['pxriga'] * 31)),
                (self.ss['bordery'] + (self.ss['pxriga'] * 1))
                )
        self.ss['tx'].textOut("printing...")
        self.ss['cnvs'].drawText(self.ss['tx'])
        self.ss['cnvs'].showPage()
        self.ss['cnvs'].save()

jo


jo ha scritto:

> Hi all,

>

> I added a new font file to reportlab at  

> /usr/lib/python2.4/site-packages/reportlab/fonts

> I'm trying to use it but I have some difficulties.

>

> If I call the function to print a line (self.show(txt='printing...', 

> x=31, y=1,font='OCR',size=6) )

> the first time it works, but the second time it rises the error:

> ValueError: redefining named object: 

> 'toUnicodeCMap:SUBSET+OCRB10PitchBT-Regular+0'

>

>

> here the sample:

> ----------------------------------------------------------------------------------------------- 

>

> import reportlab

> from reportlab.pdfbase import pdfmetrics

> from reportlab.pdfbase.ttfonts import TTFont

> reportlab.rl_config.warnOnMissingFontGlyphs = 0

> pdfmetrics.registerFont(TTFont('OCR', 

> '/usr/lib/python2.4/site-packages/reportlab/fonts/OCR-b___.ttf'))

> from reportlab.pdfgen import canvas

>

> class Fattura:

>   def __init__(self,filename):

>       self.ss = dict(   tx = None            ,

>                         eli = None           ,

>                         cnvs = None          ,

>                         pxriga = 12          ,

>                         borderx = 10         ,

>                         bordery = 10         ,

>                         name=filename        ,

>                         pagesizex = 70 * 12  ,

>                         pagesizey = 50 * 12  ,

>                         )

>       self.ss['cnvs'] = 

> canvas.Canvas(self.ss['name'],pagesize=(self.ss['pagesizex'],self.ss['pagesizey']),bottomup=0) 

>

>

>   def stampa(self):

>       self.ss['tx'] = self.ss['cnvs'].beginText()

>       self.ss['eli'] = self.ss['cnvs'].beginPath()

>       # this line raises an error if this function is called twice...

>       self.show(txt='printing...', x=31, y=1,font='OCR',size=6)

>       self.ss['cnvs'].drawText(self.ss['tx'])

>       self.ss['cnvs'].showPage()

>       self.ss['cnvs'].save()

>       return 1

>

>   def show(self,txt='',x=None,y=None,font=None,size=None):

>       self.ss['tx'].setFont(font, size)

>       self.ss['tx'].setHorizScale(100)

>       if x is not None and y is not None:

>           self.ss['tx'].setTextOrigin(0,0)

>           self.ss['tx'].moveCursor(

>       (self.ss['borderx'] + (self.ss['pxriga'] * x)), 

> (self.ss['bordery'] + (self.ss['pxriga'] * y)) )

>       self.ss['tx'].textOut(" "+txt)

>

> fd=open('pippo.pdf','w')

> e=Fattura(fd)

> for ii in range(2):

>   ret=e.stampa()

> fd.close()

>

>

> here the error:

>

> # python test.py

> Traceback (most recent call last):

> File "test.py", line 44, in ?

>   ret=e.stampa()

> File "test.py", line 29, in stampa

>   self.ss['cnvs'].save()

> File "/usr/lib/python2.4/site-packages/reportlab/pdfgen/canvas.py", 

> line 831, in save

>   self._doc.SaveToFile(self._filename, self)

> File "/usr/lib/python2.4/site-packages/reportlab/pdfbase/pdfdoc.py", 

> line 233, in SaveToFile

>   f.write(self.GetPDFData(canvas))

> File "/usr/lib/python2.4/site-packages/reportlab/pdfbase/pdfdoc.py", 

> line 245, in GetPDFData

>   fnt.addObjects(self)

> File "/usr/lib/python2.4/site-packages/reportlab/pdfbase/ttfonts.py", 

> line 1040, in addObjects

>   pdfFont.ToUnicode = doc.Reference(cmapStream, 'toUnicodeCMap:' + 

> baseFontName)

> File "/usr/lib/python2.4/site-packages/reportlab/pdfbase/pdfdoc.py", 

> line 475, in Reference

>   raise ValueError, "redefining named object: "+repr(name)

> ValueError: redefining named object: 

> 'toUnicodeCMap:SUBSET+OCRB10PitchBT-Regular+0'

>

>

>

> anyone knows how to solve this problem?

> thank you all,

>

> j

>

>

>

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