Re: Adding links to a document

On 09/08/13 13:58, Robert Marcano wrote:
> On 08/08/2013 05:55 PM, James Burton wrote:
>> I'm new to using batik, and I want to turn all text elements in an
>> SVGDocument into links which pass the text to a callback. Can you point
>> me to an example of something similar? I'm finding the text elements
>> like this:
>
> There is no need to modify the document
>

Hi Robert, thanks for your reply. I've applied your suggestion but 
haven't managed to add links to my document yet as far as I can tell. 
The pointer doesn't change over the text (not sure if it that's the 
default) and more importantly the event handler isn't triggered. Here's 
what it looks like now:

for(int i=0;i<labels.getLength();i++) {
   n = labels.item(i);
   log.info("A label:"+n.getFirstChild().getNodeValue());//prints as
                                                         //expected
   EventListener l = new EventListener() {
     public void handleEvent(Event evt) {
       log.info("Clicked on "+(
         (Node) evt.getTarget()).getFirstChild().getNodeValue());
     }
   };
   ((EventTarget) n).addEventListener("click", l, false);
}

Quite happy to RTFM if someone can point me to a suitable FM. I'm aware 
of http://xmlgraphics.apache.org/batik/using/, but it's low on examples. 
Cheers,

Jim

>>
>> SVGDocument doc = ...
>> Element svgRoot = doc.getDocumentElement();
>> NodeList labels = svgRoot.getElementsByTagNameNS("*", "text");
>> Node n;
>> for(int i=0;i<labels.getLength();i++) {
>>    n = labels.item(i);
>>    log.info("A label:"+n.getFirstChild().getNodeValue());
>
>       EventListener l = new EventListener {
>          public void handleEvent(Event evt) {
>             // you can try to use the current n element here, that
>             // means you need to make it final and build one listener
>             // for each element or use evt.getTarget() to get the
>             // element and use only one listener instance per document
>          }
>      }
>      n.addEventListener("click", l, false)
>
>>    //presumably, replace n with a link element that contains n?
>> }
>>
>
> You can use too event bubbling on the addEventListener and attach only
> one listener on the document root and check the element type you are
> getting, instead of attaching a listener to each element, the advantage
> of this method is that it work for all text elements you add later
> without need to add a listener to them
>
>
>> Thanks in advance,
>>
>> Jim
>>
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-- 
Dr Jim Burton
Senior Lecturer in Computing
School of Computing, Engineering and Mathematics
University of Brighton

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