Hi Martin, it seems stubbornness can sometimes pay off. I think I now understand more clearly what's going on:
http://tech.groups.yahoo.com/group/svg-developers/message/63004 Thanks for your effort Thomas > -----Ursprüngliche Nachricht----- > Von: "Martin Jacobson" <[email protected]> > Gesendet: 03.11.09 09:26:21 > An: [email protected] > Betreff: Re: unable to add property to JavaScript node object > Hi again! > > I'm stubborn too, so I looked at the example you gave, and tweaked it > slightly, as below... > > <?xml version="1.0"?> > <!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" > "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd";> > > <svg version="1.1" xmlns="http://www.w3.org/2000/svg"; onload="init()"> > <script type="text/javascript"> > init = function(){ > testnode = document.getElementById("testnode"); > alert(testnode.fill); > alert(testnode.getAttribute("fill")); > testnode.setAttribute("fill", "red"); > } > </script> > <rect id="testnode" fill="black" width="100" height="100" x="150" y="150"/> > </svg> > > When run through both Squiggle and Firefox 3.5 I get the same > behaviour; there is no public fill property - you have to use > getAttribute(). So the first alert() gives "undefined", and the second > gives "black". Then, the rectangle turns red. It seems that the > properties of DOM nodes are private, and can only be accessed using > get/set methods. > > Martin > > > 2009/11/3 <[email protected]>: > > Martin, > > > > thanks anyway for your effort, I appreciate that! I hope I'll be able to > > start a project using Batik for SVG display and interaction. That's one > > reason why I'm interested in what's going on here. > > > > Vielen Dank! > > Thomas > > > > > >> -----Ursprüngliche Nachricht----- > >> Von: "Martin Jacobson" <[email protected]> > >> Gesendet: 03.11.09 08:05:36 > >> An: [email protected] > >> Betreff: Re: unable to add property to JavaScript node object > > > > > >> Thomas, > >> > >> You're quite right to be stubborn! Unfortunately, I can no longer be > >> of much help: I use Batik, but I use the Java binding to the DOM, and > >> know much less about how the DOM interacts with JavaScript. I hope > >> someone with more experience of Javascript can help you. > >> > >> mit freundlichen gruessen, > >> Martin > >> > >> 2009/11/3 <[email protected]>: > >> >> -----Ursprüngliche Nachricht----- > >> >> Von: "Martin Jacobson" <[email protected]> > >> > > >> >> I see what you mean, but the problem is, the properties of a DOM node > >> >> object ARE the attributes of the XML node! > >> > > >> > > >> > Sorry, but I doubt that. Take the following example: > >> > > >> > <?xml version="1.0"?> > >> > <!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" > >> > "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd";> > >> > > >> > <svg version="1.1" xmlns="http://www.w3.org/2000/svg"; onload="init()"> > >> > <script type="text/javascript"> > >> > init = function(){ > >> > testnode = document.getElementById("testnode") > >> > alert(testnode.fill) > >> > alert(testnode.getAttributeNS(null,"fill")) > >> > testnode.fill="red" > >> > } > >> > </script> > >> > <rect id="testnode" fill="black" width="100" height="100" x="150" > >> > y="150"/> > >> > </svg> > >> > > >> > > >> > If you were right, then alert(testnode.fill) should say "black", but it > >> > doesn't. Neither with Batik nor in any Browser I tested. Likewise, > >> > testnode.fill="red" should change the rect's color to red, but it > >> > doesn't. I get the familiar error message: > >> > > >> > Java class "org.apache.batik.dom.svg.SVGOMRectElement" has no public > >> > instance field or method named "fill". (Inline <script> > >> > file://localhost/E:/programmieren/svg/js/js_attribute_to_node_object_4.svg:6#6) > >> > > >> >> Adding an arbitrary > >> >> Javascript property to a DOM node is the same thing as adding that > >> >> attribute to the XML node, so if that attribute isn't allowed by the > >> >> DTD, I guess Batik is - unfortunately for you! - correct to disallow > >> >> it. > >> > > >> > According to the DTD, the fill attribute is allowed, but Batik still > >> > doesn't accept it. On the other hand, Batik allows me to add an XML > >> > attribute to the rect node that, according to the DTD, isn't allowed: > >> > > >> > > >> > <?xml version="1.0"?> > >> > <!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" > >> > "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd";> > >> > > >> > <svg version="1.1" xmlns="http://www.w3.org/2000/svg"; onload="init()"> > >> > <script type="text/javascript"> > >> > init = function(){ > >> > testnode = document.getElementById("testnode") > >> > testnode.setAttributeNS(null,"myAttribute","test") > >> > alert(testnode.getAttributeNS(null,"myAttribute")) > >> > } > >> > </script> > >> > <rect id="testnode" fill="black" width="100" height="100" x="150" > >> > y="150"/> > >> > </svg> > >> > > >> > > >> >> As a practical alternative, can't you define an object that *contains* > >> >> the DOM node, plus any other properties you may wish to add? > >> >> > >> > > >> > Certainly, I can work around this. But I still would like to clarify > >> > whether this is a bug in Batik or on purpose. Sorry if I'm becoming > >> > stubborn, but I really want to understand what's right and wrong in this > >> > context. > >> > > >> > Thomas W. > >> > ______________________________________________________ > >> > GRATIS für alle WEB.DE-Nutzer: Die maxdome Movie-FLAT! > >> > Jetzt freischalten unter http://movieflat.web.de > >> > > >> > > >> > --------------------------------------------------------------------- > >> > To unsubscribe, e-mail: [email protected] > >> > For additional commands, e-mail: [email protected] > >> > > >> > > >> > >> > >> > >> -- > >> From my MacBook Pro > >> > >> --------------------------------------------------------------------- > >> To unsubscribe, e-mail: [email protected] > >> For additional commands, e-mail: [email protected] > >> > >> > > > > > > ________________________________________________________________ > > DSL-Preisknaller: DSL-Komplettpakete schon für 16,99 Euro/mtl.!* > > http://produkte.web.de/go/02/ > > > > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: [email protected] > > For additional commands, e-mail: [email protected] > > > > > > > > -- > From my MacBook Pro > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [email protected] > For additional commands, e-mail: [email protected] > > ________________________________________________________________ DSL-Preisknaller: DSL-Komplettpakete schon für 16,99 Euro/mtl.!* http://produkte.web.de/go/02/ --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
