[reportlab-users] Multipage tables

[Robin Becker]

On 30/09/2010 23:48, Juan Efren Castillo wrote:

> Thanks for your response, I am doing this way:

>

> canvasTable = Table(data, colWidths=tuple(widths), rowHeights=None)

> w,h = canvasTable.wrapOn(p,3*72,2*72)

> canvasTable.drawOn(p, t.x, page_size[1]-t.y-h, 0)

>

> So what I understand is to do a wrap for each page ?

>

> On Thu, Sep 30, 2010 at 6:58 AM, Robin Becker<robin at reportlab.com>  wrote:

>

>> On 30/09/2010 02:29, Juan Efren Castillo wrote:

>>

>>> I have a dynamically generated table how ever when the number of rows is

>>> big, they just got printed outside my canvas, how can I print these rows

>>> in

>>> other page ?

>>> Thanks in advance. :)

>>>

>> .......

>> you don't say exactly how you're drawing the table. Since Tables are

>> Flowables the doctemplate classes handle them properly. If you're trying to

>> draw them directly onto a canvas then you need to emulate the way that the

>> doctemplate does it when the flowables are added to a frame.

>>

>> table.wrap(availableWidth,availableHeight) -->  requiredWidth,

>> requiredHeight

>>

>> table.split(availableWidth,availableHeight) -->  list of flowables, the

>> first of which is supposed to fit into the available space.

>>

>>

>> --

>> Robin Becker

>>

>

>

>


It's not exactly clear how the table content relates to the page since t is not 
shown.

The obvious way to split up a table into chunks is then going to be like this

T = [Table(data, colWidths=tuple(widths), rowHeights=None)]
tH = xxx	#desired size per page
tW = xxx
x = xxx		#desired table location on the page
y = xxx

while T:
	t = T.pop(0)
	w,h = t.wrapOn(canv,tW,tH)
	if w>tW:
		raise ValueError('table too wide')
	if h>tH:
		S = t.splitOn(canv,tW,tH)
		if not S:
			raise ValueError('cannot split table')
		#S[0] should fit
		t = S.pop(0)
		t.drawOn(canv, x, y, 0)
		T[0:0] = S	#insert unused stuff back into T
		canv.showPage()
	else:
		#whole table fits do that
		t.drawOn(canv, x, y, 0)
	

or something similar with variation in positions/sizes etc etc
-- 
Robin Becker