DocumentSVG.java

/*
 * Encog(tm) Workbench v3.4
 * http://www.heatonresearch.com/encog/
 * https://github.com/encog/encog-java-workbench
 *
 * Copyright 2008-2016 Heaton Research, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
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 * See the License for the specific language governing permissions and
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package org.encog.workbench.util.graph;

import java.awt.geom.Rectangle2D;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.Writer;

import org.apache.batik.dom.GenericDOMImplementation;
import org.apache.batik.svggen.SVGGraphics2D;
import org.encog.workbench.WorkBenchError;
import org.jfree.chart.JFreeChart;
import org.w3c.dom.DOMImplementation;
import org.w3c.dom.Document;

public class DocumentSVG {
    public static void saveSVG(File filename, JFreeChart chart, int width, int height) {
    	try {
    	// THE FOLLOWING CODE BASED ON THE EXAMPLE IN THE BATIK DOCUMENTATION...
    	// Get a DOMImplementation
    	DOMImplementation domImpl
    	= GenericDOMImplementation.getDOMImplementation();
    	// Create an instance of org.w3c.dom.Document
    	Document document = domImpl.createDocument(null, "svg", null);
    	// Create an instance of the SVG Generator
    	SVGGraphics2D svgGenerator = new SVGGraphics2D(document);
    	// set the precision to avoid a null pointer exception in Batik 1.5
    	svgGenerator.getGeneratorContext().setPrecision(6);
    	// Ask the chart to render into the SVG Graphics2D implementation
    	chart.draw(svgGenerator, new Rectangle2D.Double(0, 0, width, height), null);
    	// Finally, stream out SVG to a file using UTF-8 character to
    	// byte encoding
    	boolean useCSS = true;
    	Writer out = new OutputStreamWriter(new FileOutputStream(filename), "UTF-8");
    	svgGenerator.stream(out, useCSS);
    	} catch(IOException ex) {
    		throw new WorkBenchError(ex);
    	}
    }

}