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From "Uday Kumar" <u...@eself.com>
Subject Re: tree structure
Date Mon, 16 Jul 2001 20:26:10 GMT
thanks a lot....

-Uday

----- Original Message -----
From: "Mark Priatel" <mpriatel@espial.com>
To: <velocity-user@jakarta.apache.org>
Sent: Monday, July 16, 2001 1:15 PM
Subject: RE: tree structure


> What I've done in the case of showing a thread tree in a message forum is
to
> create a tree object, then make the tree implement Iterator.  Your
iterator
> implementation should return tree nodes in a depth-first (uh...I think
> that's the right term) fashion so that each call to next() returns nodes
> from left to right, top to bottom.
>
> Afterwards, your tree, given a node, should be able to tell you what that
> node's depth is ( or add aa depth property to your node so that you can
> create proper indentation)...Any rate, here's my velocity template (you
can
> see this in action at:
http://www.devicetop.com/site/forum/viewmsg/msg-8026
> (bottom of page), as an example..)
>
> Hope if helps...
>
> ---template----
>
> <!-- Begin forum_thread_snapshot -->
> <hr size=1 noshade>
> <b>Message Thread</b>
> #set($MAX = 8)   #* max levels of indentation *#
> <table width=400 border=0 cellpadding=0 cellspacing=0>
>  <tr>
> #foreach( $i in [1..$MAX])
> <td width=10><img src=/DT/images/spacer.gif width=10 height=1></td>
> #end
>  <td width=100%></td>
> </tr>
>
> #foreach( $node in $tree.getTreeIterator() )
>  #set($m = $node.getValue()) #* msg subject *#
>  #set($d = $tree.getDepth($node)) #*
>  #set($diff = $MAX - $d + 1 )
> <tr>
>  #if($d > $MAX) #set($d = $MAX) #end
>  #if($d != 0)
>     #foreach($i in [1..$d])
>       <td> </td>
>     #end
>  #end
>     <td colspan=$diff>
>     <a href=$context/forum/viewmsg/msg-$m.getID()>$m.getSubject()</a>
>     #if($m.getID() == $msg.getID()) (viewed) #end
>     </td>
> </tr>
> #end
>
> </table>
> <hr size=1 noshade>
>
> <!-- End forum_thread_snapshot -->
>
> -----Original Message-----
> From: Uday Kumar [mailto:uday@eself.com]
> Sent: Monday, July 16, 2001 3:19 PM
> To: velocity-user@jakarta.apache.org
> Subject: tree structure
>
>
> hi guys
>
> i wanna know if any one of u has already implemented a tree structure
> (similar to windows explorer, atleast indentation, if not collapsing and
> expanding) in velocity? i mean if i have a vector thru which i need to
loop
> using foreach and print out as a tree.
>
> -Uday
>
>
> ----- Original Message -----
> From: "Jon Stevens" <jon@latchkey.com>
> To: "velocity-user" <velocity-user@jakarta.apache.org>
> Sent: Monday, July 16, 2001 12:11 PM
> Subject: Re: Can I write a macro that can call itself?
>
>
> > on 7/14/01 6:15 AM, "Brad Cox" <bcox@virtualschool.edu> wrote:
> >
> > > And he wonders why more people don't pitch in to help. Sigh.
> >
> > I don't wonder that.
> >
> > -jon
> >
> >
>


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