[reportlab-users] Float flowable to bottom of page

[Adrian Klaver]

On Thursday 04 February 2010 6:30:52 am Robin Becker wrote:

> On 03/02/2010 21:59, James Lance wrote:



>

> OK this code appears a bit better in that you don't need to work out the

> height of the flowables before doing stuff

>

> #############################################

> from reportlab.platypus.flowables import KeepTogether, Spacer, _listWrapOn,

> _flowableSublist, PageBreak

> from reportlab.platypus.doctemplate import FrameBreak

> class FloatToEnd(KeepTogether):

>      '''

>      Float some flowables to the end of the current frame

>      '''

>      def __init__(self,flowables,maxHeight=None,brk='frame'):

>          self._content = _flowableSublist(flowables)

>          self._maxHeight = maxHeight

>          self._state = 0

>          self._brk = brk

>

>      def wrap(self,aW,aH):

>          return aW,aH+1  #force a split

>

>      def _makeBreak(self,h):

>          if self._brk=='page':

>              return PageBreak()

>          else:

>              return FrameBreak


I have been following along and I think I understand what is going on, except 
for above. I know this is test for the type of break, but where does that come 
into play? Also should it not be PageBreak?



>

>      def split(self,aW,aH):

>          dims = []

>          W,H = _listWrapOn(self._content,aW,self.canv,dims=dims)

>          if self._state==0:

>              if H<aH:

>                  return [Spacer(aW,aH-H)]+self._content

>              else:

>                  S = self

>                  S._state = 1

>                  return [self._makeBreak(aH), S]

>          else:

>              if H>aH: return self._content

>              return [Spacer(aW,aH-H)]+self._content

>




-- 
Adrian Klaver
adrian.klaver at gmail.com