private void OnTimeChanged(DateTime?oldValue, DateTime?newValue)
{
TimeInstant oldTime = oldValue != null ? new TimeInstant(((DateTime)oldValue).Hour, ((DateTime)oldValue).Minute) : new TimeInstant();
_value = newValue != null ? new TimeInstant(((DateTime)newValue).Hour, ((DateTime)newValue).Minute) : new TimeInstant();
NotifyMinutesPropertyChanged(oldTime, _value);
NotifyHoursPropertyChanged(oldTime, _value);
}
private void NotifyMinutesPropertyChanged(TimeInstant oldValue, TimeInstant newValue)
{
// Notify when changed, but also when minutes is zero, as that is the starting value
if (TimeInstant.MinutesAreDifferent(oldValue, newValue) || newValue.Minutes == 0)
{
NotifyPropertyChanged("Minutes");
this.SetValue(TimeProperty, _value.ToDateTime());
}
}
public static bool HoursAreDifferent(TimeInstant lhs, TimeInstant rhs)
{
if (lhs.IsEmpty ^ rhs.IsEmpty)
{
return(true);
}
if (lhs.IsEmpty && rhs.IsEmpty)
{
return(false);
}
return(lhs.Hours != rhs.Hours);
}
private void DecrementMinutes()
{
if (!IsContentValid)
{
return;
}
TimeInstant prevValue = _value;
if (_value.IsEmpty)
{
_value = TimeInstant.EndOfDay;
NotifyHoursPropertyChanged(prevValue, _value);
}
_value.DecrementMinutes();
NotifyMinutesPropertyChanged(prevValue, _value);
}