[Zope] Q: Howto create a different tree element ?

[Shaw, Howard]

It is indeed possible to add a custom tag from a product. I used this
technique in my Counter product. I copied the technique from the
Calender product (I don't remember off hand who created that), which
implements a seriously powerful tag. It (the Calendar product) is
available from the Zope contributions download page, and demonstrates
how to construct a tag which can contain DTML to be rendered per
iteration, as well as how to create variables to be made available to
the inner DTML, much like the 'in' tag.

Howard C. Shaw III
Programmer/SysAdmin
St. Thomas High School


> ----------
> From: 	Johan Carlsson[SMTP:johanc@torped.se]
> Reply To: 	johanc@torped.se
> Sent: 	Monday, April 19, 1999 12:59 PM
> To: 	zope@zope.org
> Subject: 	RE: [Zope] Q: Howto create a different tree element ?
> 
> 
> 
> 
> Hi Gregor,
> I'm about to do the exactly same thing.
> Maybe we can work together on this one?
> 
> I have tried using DTML to solve this but i'm
> slowly getting to the conclusion that its too much
> a hussle to get it working.
> 
> Mayby subclassing the tree-tag removing the
> stuff that we don't need could be a way to try.
> but I'm not sure if it's possible to add custom
> tag from a product? 
> 
> If you have any bright ideas I'm all ears.
> 
> Best Regards,
> Johan Carlsson
>  
> 
> > I need a navigation element for tree-like structures, but with a
> different
> > rendering (no collapsing/expanding, different font sizes for the
> various
> > depths etc.). I could try and write that thing from scratch, but 
> > given that
> > most of its interface is similar to the TreeDisplay code, I wonder
> what
> > would be the zopisticated way to reuse the interface and as much
> code as
> > possible.
> > 
> > Perhaps a similar question is: given that TreeDisplay is a 
> > builtin DTML tag,
> > should I try to augment the TreeDisplay code, or is there a
> reasonable way
> > to build user-defined DTML tags, or is it more reasonable to 
> > employ traditional
> > methods (e.g. var-exprs) for this ?
> > 
> > 	Gregor
> > 
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