使用reportlab在流程中编写多行文本 [英] Write multiple lines of text in a flow with reportlab

问题描述

这可以使用reportlab在PDF文件中写入文本:

This works to write a text in a PDF file with reportlab:

from reportlab.pdfgen import canvas
from reportlab.lib.units import cm

c = canvas.Canvas("test.pdf")
c.drawString(1 * cm, 29.7 * cm - 1 * cm, "Hello")
c.save()

但是在处理多行文本时，必须处理每行新行的x, y坐标是不愉快的:

but when dealing with multiple lines of text, it's unpleasant to have to handle the x, y coordinate of each new line:

text = "Hello\nThis is a multiline text\nHere we have to handle line height manually\nAnd check that every line uses not more than pagewidth"
c = canvas.Canvas("test.pdf")

for i, line in enumerate(text.splitlines()):
    c.drawString(1 * cm, 29.7 * cm - 1 * cm - i * cm, line)

c.save()

使用reportlab可以更聪明地做到这一点吗?

Is there a more clever way to do this with reportlab?

推荐答案

一种选择是使用reportlab提供的Flowable，一种可流动元素是Paragraph.段落支持<br>作为换行符.

One option is to use the Flowables that reportlab provides, one type of flowable element is a Paragraph. Paragraphs support <br> as line breaks.

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

my_text = "Hello\nThis is a multiline text\nHere we do not have to handle the positioning of each line manually"

doc = SimpleDocTemplate("example_flowable.pdf",pagesize=A4,
                        rightMargin=2*cm,leftMargin=2*cm,
                        topMargin=2*cm,bottomMargin=2*cm)

doc.build([Paragraph(my_text.replace("\n", "<br />"), getSampleStyleSheet()['Normal']),])

第二种选择是将drawText与TextObject一起使用:

A second option is to use drawText with a TextObject:

c = canvas.Canvas("test.pdf")
textobject = c.beginText(2*cm, 29.7 * cm - 2 * cm)
for line in my_text.splitlines(False):
    textobject.textLine(line.rstrip())
c.drawText(textobject)
c.save()

这篇关于使用reportlab在流程中编写多行文本的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！