sclass DesktopPaneWithFitPicture_smooth_cacheScaled extends JDesktopPane {
  BufferedImage image, originalImage, scaled;
  *() {}
  *(BufferedImage *image) {}
  
  protected void paintComponent(Graphics g) {  
    if (image == null) { originalImage = scaled = null; }
    else {
      Pt size = calcFitSize(image, this);
      if (image != originalImage || scaled == null || scaled.getWidth() != size.x || scaled.getHeight() != size.y) {
        _print("Scaling image");
        originalImage = image;
        scaled = resizeImage(image, size.x, size.y);
      }
    }
    paintCenteredBackgroundImage(this, g, scaled);
  }
  
  void setImage(BufferedImage image) { this.image = image; repaint(); }
}