JFrame f = new JFrame();
f.setDefaultCloseOperation(f.EXIT_ON_CLOSE);
f.getContentPane().add(canvas);
canvas.setSVGDocument(doc);
canvas.setEnableZoomInteractor(true);
canvas.getInteractors().add(new Interactor() {
public boolean startInteraction(InputEvent inputEvent) {
System.out.println("si");
return true;
}