Re: [Zope] alternating colors based on sequence-index of outer loop

25 Mar 2002


      John Hunter wrote:
...
I have a folder called Sections that is filled with Section instances.
Each Section contains a variable number of students, and I want all
the students in a given section to have the same row color in my
table, with sections alternating colors.
I have nested dtml-in loops over the sections and students in each
section, and want the rows of my table to alternate in batches
depending on whether the outer loop is even or odd.  Basically, I need
to do a dtml-let in the outer loop that the inner loop will access,
but am having trouble with the syntax.
Here is some example dtml with pseudo code to set the default_color
<dtml-in expr="Sections.objectValues('Section')" mapping>
          <dtml-if sequence-even>
             default_color="gray"
          <dtml-else>
             default_color="white"
          </dtml-if>
         <dtml-in expr="_['sequence-item'].objectValues('Student')" mapping>
          <tr default_color>
                ..Fill in the row..
           </tr>
         </dtml-in>
      </dtml-in>
Thanks for any help,
John Hunter
There is a prefix attribute to dtml-in, which allows you to name the
different sequence iterators.For details see
http://www.zope.org/Members/michel/ZB/AppendixA.dtml
cheers hans
-------------------------------------------------------------
Who's got only a hammer sees the world as a nail
hans augustin  (software developer)           hans@beehive.de
beehive elektronische medien GmbH       http://www.beehive.de
phone: +49 30 847-82 0                  fax: +49 30 847-82 299