[Zope] Tree/nav has me perplexed

[Martijn Pieters]

At 21:49 08/09/99 , Bruce Elrick wrote:
>Howdy all..
>
>I've read through the DTML Guide section on the tree tag as well as Tad
>Murphy's How-To, but I still can't get the tree tag to do what I want.
>
>I have folders that are meant to be part of the site hierarchy as well as
>folders that are simply used to clean up the management view of the site.  For
>example, I have an Images folder at the top, but I don't expect users to
>browse to http://site/Images, so I don't want that folder to appear in the nav
>tree.  If I add a property called 'hidden' to such folders and use the
>following code:
><dtml-tree
>   expr="PARENTS[0]"
>   skip_unauthorized=1 sort=title_or_id
>   branches_expr="objectValues(['Folder', 'Squishdot Site'])"
>   >
>   <dtml-if hidden>
>      <!--Skipping hidden-->
>   <dtml-else>
>     <a href="<!--#var absolute_url-->"><!--#var id--></A>
>   </dtml-if>
></dtml-tree>
>Then the tree is still rendered with the 'hidden' folders but with no text
>etc.  That is, it takes up space in the tree and shows a plus if it has
>subfolders.  What I would like is that such folders (and their subfolders) are
>not rendered at all.
>
>I'm thinking I have to provide some code in place of the
>objectValues(['Folder', 'Squishdot Site'])
>that returns the same minus said items that have 'hidden' as a property,
>but I don't understand whether this 'code' would be a DTML method or an
>external method, or what 'type' of this it would return (a list?).

Indeed, you'd need to replace the objectValues method.

Lucky for you, someone already wrote such a method for you. It is called 
Navigate version 0.0.4, and can be downloaded from 
http://www.zope.org/Download/Contrib

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Martijn Pieters, Web Developer
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