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!7

sclass SystemCPUTrayIcon extends DynBigNumber {
  transient BufferedImage trayImage;
  transient TrayIcon trayIcon; 
  
  start {
    setDescription("SYSTEM CPU %");
    setToolTip("Percentage is per core (max=" + numberOfCores()*100 + "%)");
    ownTimer(doEvery(2.0, r actualUpdate));
    ownResource(tempTrayIcon(trayIcon = installTrayIcon(trayImage = whiteImage(24, 24), "System CPU")));
  }
  
  void actualUpdate {
    setValue(toIntPercent_ceil(systemCPULoad()*numberOfCores()) + " %");
    fillRect(trayImage, 0, 0, trayImage.getWidth(), trayImage.getHeight(), Color.green);
    trayIcon.setImage(trayImage);
  }
}