static int mouseClick_delay = 100; // how long to keep pressed

static void mouseClick(Rect r) {
  mouseClick(centerOfRect(r));
}

static void mouseClick(Pt p) {
  mouseClick(p.x, p.y);
}

static void mouseClick(int x, int y) ctex {
  final new Robot robot;
  robot.mouseMove(x, y);
  mouseClick();
}

static void mouseClick() ctex {
  final new Robot robot;
  final int button = InputEvent.BUTTON1_DOWN_MASK;
  robot.mousePress(button);
  sleep(mouseClick_delay);
  robot.mouseRelease(button);
}