Re: How do I parse style information to get Java Color?

James Balnaves Thu, 02 Feb 2006 12:26:37 -0800

When I try this, the CSSStyleDeclaration ends up containing an "element" member of type SVGOMPathElement that has attributes "fill" and "d", but the CSSStyleDeclaration "values" member HashMap is empty. When I call style.getPropertyCSSValue("stroke") I get a null pointer exception, even though this value exists up in the main svg element.

Any ideas? Do I have to search all the way up the tree for the stroke attribute? (although getComputedStyle() on the SVG element does not seem to work either).

I have included the SVG file I am trying to work with below:

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE svg PUBLIC '-//W3C//DTD SVG 1.0//EN' 'http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd'>

<g>

</g>

</svg>

On Feb 1, 2006, at 5:19 PM, Cameron McCormack wrote:

Hi James.

James Balnaves:

I would like to use Batik to construct a java.awt.Color object from
the "stroke:rgb(11,11,138);" information but I understand that the
color information could be described in many different ways as CSS
allows.

Something like this would do it, using the standard SVG/CSS DOM
interfaces (untested):

Element path = ...; // the path element
Document doc = p.getOwnerDocument();
SVGSVGElement svg = (SVGSVGElement) doc.getDocumentElement();
CSSStyleDeclaration style = svg.getComputedStyle(path, "");
SVGPaint stroke = (SVGPaintValue) style.getPropertyCSSValue("stroke");
// assuming that it's a solid colour:
RGBColor rgb = stroke.getRgbColor();
float r = rgb.getRed().getFloatValue(CSSValue.CSS_NUMBER);
float g = rgb.getGreen().getFloatValue(CSSValue.CSS_NUMBER);
float b = rgb.getBlue().getFloatValue(CSSValue.CSS_NUMBER);
Color c = new Color(r / 255, g / 255, b / 255);

Re: How do I parse style information to get Java Color?

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