After more searching, I finally found a message that suggested a path:
http://www.mail-archive.com/[EMAIL PROTECTED]/msg03376.html
as amended by its reply:
http://www.mail-archive.com/[EMAIL PROTECTED]/msg03379.html
The folowing outputs two maps with diffeent colors for the United States:
public void testTranscode() {
try {
String parser = XMLResourceDescriptor.getXMLParserClassName();
SAXSVGDocumentFactory f = new SAXSVGDocumentFactory(parser);
String filename = "C:/maps/BlankMap-World6.svg";
String uri = "file:///" + filename;
Document doc = f.createDocument(uri, new FileReader(filename));
SVGDocument sdoc = (SVGDocument)doc;
Element svgRoot = sdoc.getDocumentElement();
PNGTranscoder t = new PNGTranscoder();
TranscoderInput input = new TranscoderInput(doc);
// find the existing stylesheet in the map
NodeList stylesList = doc.getElementsByTagName("style");
Node styleNode = stylesList.item(0);
// append another stylesheet after the existing one
SVGStyleElement style = (SVGStyleElement)
doc.createElementNS(SVG_NAMESPACE_URI,
"style");
style.setAttributeNS(null,"type","text/css");
style.appendChild(doc.createCDATASection(".us {fill: blue;}"));
styleNode.getParentNode().appendChild(style);
// transcode the map
OutputStream ostream = new FileOutputStream("outblue.jpg");
TranscoderOutput output = new TranscoderOutput(ostream);
t.transcode(input, output);
ostream.close();
// replace the appended stylesheet with another
SVGStyleElement oldStyle = style;
style = (SVGStyleElement)
doc.createElementNS(SVG_NAMESPACE_URI,
"style");
style.setAttributeNS(null,"type","text/css");
style.appendChild(doc.createCDATASection(".us {fill: green;}"));
styleNode.getParentNode().replaceChild(style, oldStyle);
// transcode the revised map
ostream = new FileOutputStream("outgreen.jpg");
output = new TranscoderOutput(ostream);
t.transcode(input, output);
ostream.close();
} catch (Exception ex) {
ex.printStackTrace();
}
}
zb wrote:
>
> In message
> http://www.nabble.com/Batik---PNG-Transcoder-to10713115.html#a10713183
> the author remarks that I can recolor SVG elements by loading the document
> with SAXSVGDocumentFactory.createDocument and "then modify it."
>
> That post gives several valuable tips on how to color things with CSS, but
> nothing useful about modifying a style sheet that has been loaded with a
> document. Nor can I find any examples on the web. Where should I look?
>
> To be more specific, I have downloaded an SVG map from wikipedia. I plan
> to load it into a Java application and transcode it to a png several
> times, each with a different coloring. As a learning experience, I'd like
> to use method calls to modify the stylesheet. But how?
>
> Thanks,
> Fred Hansen
>
--
View this message in context:
http://www.nabble.com/%22and-then-modify-it.%22-color-via-css-tp15841042p15853807.html
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