Method selectFolder

core/src/processing/opengl/PSurfaceJOGL.java:1342–1356

(String prompt, String callbackMethod,
                           File file, Object callbackObject)

  @Override
  public void selectFolder(String prompt, String callbackMethod,
                           File file, Object callbackObject) {
    EventQueue.invokeLater(() -> {
      // https://github.com/processing/processing/issues/3831
      boolean hide = (sketch != null) &&
              (PApplet.platform == PConstants.WINDOWS);
      if (hide) setVisible(false);

      ShimAWT.selectFolderImpl(prompt, callbackMethod, file,
              callbackObject, null);

      if (hide) setVisible(true);
    });
  }
}