[reportlab-users] flowables.KeepTogether.split() adding unnecessary FrameBreak

[Robin Becker]

I think what's happening here is that the keepWithNext is creating a combined 
flowable which is larger than the entire page or frame in height ie 
KeepTogether([heading,Table([....])]). Effectively that forces the frame add to 
cause an attempt to split on the next page. Unfortunately I don't think our 
current methodology has enough information to make a decent decision. A better 
way to keep a heading with another flowable is to use some kind of conditional 
page throw

On 21/02/2010 07:30, Patrick Maupin wrote:

> This is a simplified version of a testcase that Roberto Alsina wrote, based

> on a bug report from a rst2pdf user:

>

> from reportlab.platypus import SimpleDocTemplate, Paragraph, Table

> from reportlab.lib.styles import getSampleStyleSheet

>

> ps = getSampleStyleSheet()['Normal']

> heading = Paragraph('A heading at the beginning of the document', ps)

> heading.keepWithNext=True

> paralist = [[Paragraph('This is the content', ps)] for x in range(120)]

> SimpleDocTemplate("issue277.pdf").build([heading, Table(paralist)])

>

> In RL 2.4, this prints a blank page first, unless heading.keepWithNext is

> set to False.

>

> I looked at where this is happening, but I have zero confidence that I could

> submit a patch that would not break something else, and only slightly

> greater confidence that if this is not a reportlab bug, I could figure out

> how to fix this code :-)

>

> Thanks and best regards,

> Patrick Maupin

..........

-- 
Robin Becker