[Zope] simplePager

[Lee Harr]

I wanted something to split up long lists of items into shorter
lists and make links to the pages (kind of like the page numbers
on a google search)

I saw in the docs that dtml provides this... but I could not get
that to work. It never found the batch-start-index inside of the
previous-batches

Anyhow, i found a script in the zope cookbook, but it was two
pages long and it was way more than i needed. So I made this:

#simplePager
# paramenters:
#  seq=None, page=0, size=10
#

req = context.REQUEST

url = req.URL

if req.has_key('start'):
  start = getattr(req, 'start')
else:
  start = 0

starts = range(1, len(seq)+1, size)

p = 1
for s in starts:
  print '<a href="%s?start=%s">%s</a>' % (url, s, p)
  p += 1

return printed




It works in conjunction with the dtml sequence stuff as shown
in the help pages... like this:

      <dtml-in list_thumbnails size=10 start=start previous>
        <a 
href="&dtml-absolute_url;&dtml-sequence-query;start=&dtml-previous-sequence-start-number;">Previous 
Page</a>
      </dtml-in>


where list_thumbnails happens to be another script which just returns a list
of objects (thumbnail images in this case). You might use objectValues there
instead...


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