Class SVGIOHandler from the extension package provides the yFiles library with export support for the SVG file format. It is a direct subclass of abstract class IOHandler from package y.io of the yFiles library, see also Figure 11.1, “SVG output handler class hierarchy”.

Figure 11.1. SVG output handler class hierarchy

The code fragment in Example 11.1, “Instantiating a SVGIOHandler” shows how to instantiate and use a SVGIOHandler to export the content of a given Graph2DView to a SVG-encoded file. Class SVGZIOHandler can be used in a similar manner to write Zip-compressed SVG files which are up to 50 times smaller than their uncompressed counterparts.

public void exportSVG(Graph2DView view) {
  // Instantiate a SVG output handler and export the view's content.
  try {
    IOHandler ioh = new SVGIOHandler();
    double tmpPDT = view.getPaintDetailThreshold();
    view.setPaintDetailThreshold(0.0);
    ioh.write(view.getGraph2D(), "MySVG.svg");
    view.setPaintDetailThreshold(tmpPDT);
  }
  catch (IOException ioEx) {
    // Something went wrong. Complain. 
  }
}