Wrap text in a table reportlab?

问题

I use a table but, I draw in in a canvas to control the position of the flowables, this because I have a template in a pdf, an I merge with pyPDF.

The wrap is done in a table but the text go up, not down that's what I hope.

c is the canvas

Code

from reportlab.pdfgen import canvas
from reportlab.lib.pagesizes import A4
from reportlab.lib.styles import getSampleStyleSheet
from reportlab.platypus import Paragraph, Table
from reportlab.lib.units cm

width, height = A4
styles = getSampleStyleSheet()

def coord(x, y, unit=1):
    x, y = x * unit, height -  y * unit
    return x, y

descrpcion = Paragraph('long paragraph', styles["Normal"])
partida = Paragraph('1', styles["Center"])
candidad = Paragraph('120', styles["Center"])
precio_unitario = Paragraph('$52.00', styles["right"])
precio_total = Paragraph('$6240.00', styles["right"])

data= [[partida, candidad, descrpcion, precio_unitario, precio_total]]
table = Table(data, colWidths=[2.05 * cm, 2.7 * cm, 9.6 * cm,
                               2.65 * cm, 2.7 * cm])

c = canvas.Canvas(PDF, pagesize=A4)
table.wrapOn(c, width, height)
table.drawOn(c, *coord(1.8, 9.6, cm))
c.save()

http://img600.imageshack.us/img600/3203/reportld.jpg

回答1:

The description text went up as you wrap it in a styles["Normal"] You can try to wrap your text in a styles["BodyText"] This will allow your text to align themselves according to the width of the cell you specify. You could also include formatting which is similar to HTML text formatting.

Then use TableStyle to format the content in the table, for example, color text, center paragraph, span rows/columns and so on.

I edited the code above to a working version (example):

from reportlab.pdfgen import canvas
from reportlab.lib.pagesizes import A4
from reportlab.lib.units import cm
from reportlab.lib.styles import getSampleStyleSheet
from reportlab.platypus import Paragraph, Table, TableStyle
from reportlab.lib.enums import TA_JUSTIFY, TA_LEFT, TA_CENTER
from reportlab.lib import colors

width, height = A4
styles = getSampleStyleSheet()
styleN = styles["BodyText"]
styleN.alignment = TA_LEFT
styleBH = styles["Normal"]
styleBH.alignment = TA_CENTER

def coord(x, y, unit=1):
    x, y = x * unit, height -  y * unit
    return x, y

# Headers
hdescrpcion = Paragraph('''<b>descrpcion</b>''', styleBH)
hpartida = Paragraph('''<b>partida</b>''', styleBH)
hcandidad = Paragraph('''<b>candidad</b>''', styleBH)
hprecio_unitario = Paragraph('''<b>precio_unitario</b>''', styleBH)
hprecio_total = Paragraph('''<b>precio_total</b>''', styleBH)

# Texts
descrpcion = Paragraph('long paragraph', styleN)
partida = Paragraph('1', styleN)
candidad = Paragraph('120', styleN)
precio_unitario = Paragraph('$52.00', styleN)
precio_total = Paragraph('$6240.00', styleN)

data= [[hdescrpcion, hcandidad,hcandidad, hprecio_unitario, hprecio_total],
       [partida, candidad, descrpcion, precio_unitario, precio_total]]

table = Table(data, colWidths=[2.05 * cm, 2.7 * cm, 5 * cm,
                               3* cm, 3 * cm])

table.setStyle(TableStyle([
                       ('INNERGRID', (0,0), (-1,-1), 0.25, colors.black),
                       ('BOX', (0,0), (-1,-1), 0.25, colors.black),
                       ]))

c = canvas.Canvas("a.pdf", pagesize=A4)
table.wrapOn(c, width, height)
table.drawOn(c, *coord(1.8, 9.6, cm))
c.save()

回答2:

AutoReply:

def coord(x, y, height, unit=1):
    x, y = x * unit, height -  y * unit
    return x, y

w, h = table.wrap(width, height)
table.wrapOn(c, width, height)
table.drawOn(c, *coord(ml - 0.05, y + 4.6, height - h, cm))

the trick is in the "height - h", h is the height of the table and this depend of the content of the table

回答3:

I know that Postscript's reference is the lower, left corner. I'm guessing that PDF is the same, so you subtract from the y value to go down. Print the beginning and ending "y" values in the function to see how they are changing and adjust the "y" value depending on the length of the sentence. And how does the function know what "height" is? I use ReportLab but could probably help with a specific example if you care to post one.

来源：https://stackoverflow.com/questions/4726011/wrap-text-in-a-table-reportlab

标签

python

reportlab