// paint: graphics/component width/component height
// called in AWT thread
static JComponent dynamicallyPaintedComponent(final VF3<Graphics2D, Int, Int> paint) {
  ret swing(func -> JComponent {
    ret new JComponent {
      public void paint(Graphics g) {
        callF(paint, (Graphics2D) g, getWidth(), getHeight());
      }
    };
  });
}

static JComponent dynamicallyPaintedComponent(IVF3<Graphics2D, Int, Int> paint) {
  ret dynamicallyPaintedComponent(toVF3(paint));
}