/**
   * Paint to an offscreen graphic, e.g. a graphic for an image or svg file.
   *
   * @param g
   * @param rect
   */
  public void paintOffscreen(Graphics2D g, Rectangle rect) {

    // Get the components of the sort by X position.
    Component[] components = getComponents();
    Arrays.sort(
        components,
        new Comparator<Component>() {
          public int compare(Component component, Component component1) {
            return component.getX() - component1.getX();
          }
        });

    for (Component c : this.getComponents()) {

      if (c instanceof DataPanel) {
        Graphics2D g2d = (Graphics2D) g.create();
        Rectangle clipRect = new Rectangle(c.getBounds());
        clipRect.height = rect.height;
        g2d.setClip(clipRect);
        g2d.translate(c.getX(), 0);
        ((DataPanel) c).paintOffscreen(g2d, rect);
      }
    }
    // super.paintBorder(g);
  }
 public void setCurrentTool(RegionOfInterestTool regionOfInterestTool) {
   for (Component c : this.getComponents()) {
     if (c instanceof DataPanel) {
       ((DataPanel) c).setCurrentTool(regionOfInterestTool);
     }
   }
 }