Code to generate SVG from trees
Before we can create a SVG of a binary tree, we first need a tree. We can create one via Builder
Builder builder = new Builder();
Tree tree = builder.build("112211211222");The Builder#build method accepts a Dyck word and it will build the corresponding Tree.
We can transform the Tree into an SvgTree with a TreeTransformer. The SvgTree determines the bounding boxes of
all the subtrees. The TreeTransformer is configured with a Configuration that determines radius of the vertices and
the padding around each subtree.
Configuration configuration = configuration().withNodeRadius(20).withLeafRadius(3).withPadding(5);
TreeTransformer treeTransformer = new TreeTransformer(configuration);
SvgTree svgTree = treeTransformer.transform(tree);The SvgTree can be transformed into a SVGSVGElement, that is the root of a SVG document, with a SvgTreeTransformer.
SvgTreeTransformer svgTreeTransformer = new SvgTreeTransformer(configuration);
SVGSVGElement root = svgTreeTransformer.transform(svgTree);To stream the SVG document to a file we will use a FileOutputStream and a Transformer.
FileOutputStream stream = new FileOutputStream(new File("src/main/resources/example.svg"));
TransformerFactory factory = TransformerFactory.newInstance();
Transformer transformer = factory.newTransformer();
StreamResult result = new StreamResult(stream);
transformer.transform(new DOMSource(root), result);Put together it will produce the following image
