void ExecuteFocusCommand(string s)
{
// TODO: power status check
int step;
if (!Int32.TryParse(s, out step))
{
_eventAggregator.GetEvent <ExceptionEvent>()
.Publish(new ArgumentException("Cannot parse the movement steps"));
return;
}
// put the blocking action in a separated thread
Task.Run(() => _serialService.ControlFocus(step));
}
