[reportlab-users] Keeping rows of a table together?
Tue, 17 Jun 2003 07:19:54 +1200
Following on from my previous E-Mail...
> > Could I, perhaps, create a subclass of platypus.Table and
> > override the split() method in some way?
>If you were brave, yes :-)
I started digging into Table.split(), and I was able to add this logic very
easily. All that was required was adding two lines of code to
Table._splitRows(), like this:
h = 0
n = 0
lim = len(self._rowHeights)
hn = h + self._rowHeights[n]
if hn>availHeight: break
h = hn
n = n + 1
>>> while (n > 0) and self._dontSplitAtRow[n]:
>>> n = n - 1
Of course, defining the contents of the _dontSplitRow list requires a bit
more work, but I achieved this by adding the following to the end of the
self._dontSplitAtRow = [False] * len(data)
and adding an extra method to let the user specify where not to split the
table at a particular row:
def dontSplitAtRow(self, row):
""" Prevent the table from doing a page break at the given row.
self._dontSplitAtRow[row] = True
That's all it took! I can't believe how easy this was...so I thought I'd
pass this on in case anyone else found it useful. I'd also be happy to
submit this as a patch to the reportlab source if you think it'd be
worthwhile and won't cause any unwanted side-effects.