[Zope] TALs difficulties

[Johan Carlsson]

Hi,
I need help :-)

I'm trying to implement a new Widget for Archetypes.
So I have to write TAL (not my favorite hobby).

I'm extending  the multi select widget with optgroup labels.
But I can figure out how to make the <option> contained by
the <optgroup> without breaking the XML code.

And I don't want to change the data format that's
used (which is a sub classed version of Archetypes
DisplayList that can mark items as optgroup labels,
indicated with a true value from isLabel).

Here's what I've settled for so far:
vocab is the DisplayList derivative (item is a key).

<tal:loop repeat="item vocab">
     <optgroup
         tal:attributes="label python:vocab.getValue(item);"
         tal:condition="python:vocab.isLabel(item)">
         </optgroup>
     <option selected=""
         tal:condition="not:python:vocab.isLabel(item)"
         tal:attributes="value item;
         selected python:test(here.unicodeTestIn(item, value), 	 
'selected', None);"
         tal:content="python: vocab.getValue(item)"/>
</tal:loop>

Returns something like this:

<optgroup label="A"></optgroup>
<option>Ada</option>
<option>Ape</option>
<optgroup label="B"></optgroup>
<option>Bananas</option>
<option>Buffy</option>

What I want is:

<optgroup label="A">
   <option>Ada</option>
   <option>Ape</option>
</optgroup>
<optgroup label="B">
   <option>Bananas</option>
   <option>Buffy</option>
</optgroup>

Which renders quite differently.

Best Regards,
Johan