TOC page numbers all equal 1

[Bill East]

TOC is almost perfectly generated using code below. Only one problem all TOC page numbers are 1, not the actual page number of the referenced page. 

Source code below. No answer on stackoverflow since December, so trying here! (python indentation seems to have been removed by groups. sorry!) 

Thanks in advance for helping out. otherwise reportlab is great!

================

from reportlab.lib.styles import getSampleStyleSheet, ParagraphStyle
from reportlab.platypus import SimpleDocTemplate, Flowable, Paragraph
from reportlab.platypus import PageBreak
from reportlab.platypus.tableofcontents import TableOfContents
from reportlab.lib.units import inch

class DelayedRef(Flowable):
_ZEROSIZE = True

def __init__(self, toc, *args):
self.args = args
self.toc = toc

def wrap(self,w,h):
return 0,0

def draw(self,*args,**kwd):
self.toc.addEntry(*self.args)

def addPageNumber(canvas, doc):
"""
Add the page number
"""
page_num = canvas.getPageNumber()
text = "- %s -" % page_num
canvas.drawRightString(4.5*inch,0.5*inch, text)

def simple_toc():
docFile = 'test.pdf'
print(docFile)

ipsum = '''Lorem ipsum dolor sit amet, consectetur adipiscing elit,
sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris
nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in
reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla
pariatur. Excepteur sint occaecat cupidatat non proident, sunt in
culpa qui officia deserunt mollit anim id est laborum.'''

doc = SimpleDocTemplate(docFile)
story = []
styles = getSampleStyleSheet()

story.append(Paragraph("The Title", style=styles['Heading1']))
story.append(Paragraph("Notes:", style=styles['Normal']))
story.append(Paragraph(ipsum, style=styles['Normal']))

story.append(PageBreak())
story.append(Paragraph('<a name="TOC"/>Table of Contents', style=styles['Heading1']))
toc = TableOfContents()
toc.levelStyles = [ParagraphStyle(fontName='Helvetica', fontSize=14, name='Heading1',leftIndent=20, firstLineIndent=-20, spaceBefore=5,leading=16),
ParagraphStyle(fontName='Times-Roman', fontSize=14, name='Heading2',leftIndent=20, firstLineIndent=-20, spaceBefore=5,leading=16)]
story.append(toc)

story.append(PageBreak())
story.append(Paragraph('<a name="Part1"/>1. Part 1 Header <a href="#TOC" color="blue">&#8593;</a>', style=styles['Heading1']))
story.append(DelayedRef(toc, 0, '<a href="#Part1" color="blue">1. Part 1 Header</a>', 1))
for x in range(10):
story.append(Paragraph(ipsum, style=styles['Normal']))

story.append(PageBreak())
story.append(Paragraph('<a name="Part2"/>2. Part 2 Header <a href="#TOC" color="blue">&#8593;</a>', style=styles['Heading1']))
story.append(DelayedRef(toc, 0, '<a href="#Part2" color="blue">2. Part 2 Header</a>', 1))
story.append(Paragraph(ipsum, style=styles['Normal']))


story.append(Paragraph('<a name="Part21"/>2.1 Part 2.1 Header <a href="#TOC" color="blue">&#8593;</a>', style=styles['Heading2']))
story.append(DelayedRef(toc, 1, '<a href="#Part21" color="blue">2.1 Part 2.1 Header</a>', 1))
for x in range(10):
story.append(Paragraph(ipsum, style=styles['Normal']))

story.append(PageBreak())
story.append(Paragraph('<a name="Part3"/>3. Part 3 Header <a href="#TOC" color="blue">&#8593;</a>', style=styles['Heading1']))
story.append(DelayedRef(toc, 0, '<a href="#Part3" color="blue">3. Part 3 Header</a>',1))

doc.multiBuild(story, onFirstPage=addPageNumber, onLaterPages=addPageNumber)

if __name__ == '__main__':
simple_toc()

[Da]

Hi Bill,

I was stuck at exactly the same point. I found a different way of solving the problem for my case. Maybe it helps you as well.

I posted my solution on StackOverflow:

https://stackoverflow.com/a/78450447/11826257