!7

cmodule MonitorOffTimer > DynPrintLogAndEnabled {
  switchable double timeout = 60.0; // seconds
  
  transient new RestartableCountdown countdown;
  
  start {
    dm_restartOnFieldChange timeout();
    dm_require("#1020622/UserActivityDetector");
    startCountdown();
    dm_vmBus_onMessage userActivityDetected(r startCountdown);
  }
  
  void bam enter {
    // determining whether monitor is on is difficult, so we just
    // turn it off every time the countdown expires
    if (enabled) monitorOff();
    startCountdown();
  }
  
  void startCountdown {
    countdown.start(max(timeout, 10.0), r bam);
  }
}