xmlgraphics-batik-users mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From thomas.dewe...@kodak.com
Subject Re: Mouse EventListener on SVG group elements
Date Wed, 16 Feb 2011 22:42:23 GMT
Hi Andre,

        I think the problem is that you need to tell the Canvas to be
interactive/dynamic.  If the Canvas looks at the document and doesn't
see any dynamic content it uses a quicker lower memory build that doesn't
support event handlers at all.

        Check out FAQ 3.2:
                http://xmlgraphics.apache.org/batik/faq.html

        I had no idea what the problem was for quite some time
since the difference isn't between clicking on a 'g' or an 'a' element
it's between a document that has 'a' element or a document that doesn't
have an 'a' element.

André de Brito <andre.brito@evolve.pt> wrote on 02/16/2011 04:48:44 PM:

> I'm using batik to display SVG files on a JSVGCanvas and I'm trying 
> to respond to mouse click events over SVG elements with tags <a> 
> (SVGOMAElement) and <g> (SVGOMGElement).
> Here is the code I'm using to add the event listener to a Node:
> 
> if ((no.getNodeName().equalsIgnoreCase("a")) || (no.getNodeName
> ().equalsIgnoreCase("g"))) {
>     EventTarget etr = (EventTarget) no;
>     etr.addEventListener(SVGConstants.SVG_EVENT_CLICK, new 
EventListener() {
>                     public void handleEvent(Event evt) {
>                         Log.debug("HANDLE EVENT");
>                     }
>     }, false);
> 
> What happens is that the listener is correcly called when an <a> 
> element is clicked, but nothing happens when a <g> element is clicked!
> I debuged the code above and verified that the "click" listener is 
> being added to the both node's bubblingListeners table 
> (etr->eventSupport->bubblingListeners). However, I noticed that the 
> <a> elements seem to have two other (default) listeners - for events
> "mouseout" and "mouseover" - which are not present on the <g> 
> elements. I don't believe this is the cause, but ...
> 
> Any ideas on what could be causing this behaviour?

Thomas DeWeese | CDG Advanced Development | 
Eastman Kodak Company | 343 State Street | Rochester, NY 14650-0128 | 
Thomas.DeWeese@Kodak.com | 585 724-0294 | 
www.kodak.com 

Mime
View raw message