我使用ReportLab构建PDF.我的程序有MyDocTemplate(SimpleDocTemplate)两种方法类:beforePage(self)和afterPage(self)它的每一页上添加页眉和页脚(如PNG图像).还有一个MyDocStyle类描述ParagraphStyle.
主要方法如下:
TITLE = Paragraph(Title, MyDocStyle.h1)
TO = Paragraph(To, MyDocStyle.h2)
FROM = Paragraph(From, MyDocStyle.h2)
SUBJECT = Paragraph(Subject, MyDocStyle.h2)
LONG_PARAGRAPH = Paragraph(Text, MyDocStyle.h3)
...
Elements = [TITLE, TO, FROM, SUBJECT, LONG_PARAGRAPH, ...]
doc = MyDocTemplete('output.pdf', pagesize=A4,
leftMargin=2*cm, rightMargin=2*cm,
topMargin=4*cm, bottomMargin=4*cm)
doc.build(Elements)
数据来自CSV文件和GUI.有时(取决于数据长度)我收到一个错误:
Flowable <Spacer at 0x2631120 frame=normal>...(1 x 5.66929133858) too large
on page 1 in frame 'normal'(469.88976378 x 603.118110236) of template 'First'
这个例外停止我的程序.对于我在MyDocStyle课堂上设置的简短段落,h2.keepWithNext = 1它并不是完美的解决方案.如果段落末尾与页面末尾(文本区域)"不一致",ReportLab会正确拆分长段.
我怎么处理它？