public ButtonPressCounter(IClock clock, TimeSpan debounceInterval, TimeSpan buttonPressGroupFinalization)
{
if (buttonPressGroupFinalization.TotalMilliseconds <= 2*debounceInterval.TotalMilliseconds)
throw new ArgumentOutOfRangeException("debounceInterval", "Group finalization interval must be GT 2*debounce interval");
_debounceInterval = debounceInterval;
_buttonPressGroupFinalization = buttonPressGroupFinalization;
_lastPress = DateTime.MinValue;
_notifyHandle = clock.Register(buttonPressGroupFinalization, (nc) => Tick());
}
