!7

sclass BackgroundAI > DynModule {
  int cores;

  visualize {
    final JSpinner spinner = jSpinner(cores, 0, numberOfCores());
    main.onChange(spinner, r { setField(cores := intFromSpinner(spinner)) });
    ret makeForm2(
      "Cores to use for background AI (0-" + numberOfCores() + "):",
        spinner,
      "Current activity:",
        "-"));
  }
}