static IProgressShower tempProgressBar(S text) {
  ret tempProgressBar(text, 1);
}

static IProgressShower tempProgressBar(S text, double total) {
  JProgressBar bar = showProgressWindow(text, total);
  ret new IProgressShower {
    public void setValue(double value) {
      setProgressBarValue(bar, iround(value));
    }
    
    public void setTotal(double total) {
      setProgressBarTotal(bar, iround(total));
    }
    
    public void setText(S text) {
      setProgressBarText(bar, print(text));
    }
    
    public void close {
      disposePIFrame(bar);
    }
  };
}