void DisplaySetupTimerDialog(PinTimer timer = null)
{
_timerSetupControl = new TimerSettingsSetup(timer);
NavigationService.Navigate(new Uri("/CustomDialogPage.xaml", UriKind.Relative));
}
void OnAddTimerDismissedWithOk(UIElement obj)
{
if (obj == null) return;
if (_timerSetupControl.beginDatePicker.Value == TimeSpan.Zero) return;
if (TimersListBox.Items.Contains(_timerSetupControl.Timer) == false) // if timer just created
TimersListBox.Items.Add(_timerSetupControl.Timer);
_timerSetupControl.Timer.TimerCompleted += OnTimerCompleted;
SaveTimers();
_timerSetupControl = null;
}
