private void _carouselView_PropertyChanged(object sender, PropertyChangedEventArgs e)
{
if (e.PropertyName == nameof(_carouselView.SelectedIndex) && !_supressCarouselViewPositionChangedEvent)
{
var positionChangingArgs = new PositionChangingEventArgs()
{
Canceled = false,
NewPosition = _carouselView.SelectedIndex,
OldPosition = _position
};
OnPositionChanging(ref positionChangingArgs);
if (positionChangingArgs != null && positionChangingArgs.Canceled)
{
_supressCarouselViewPositionChangedEvent = true;
_carouselView.ItemAppearing -= _carouselView_PositionSelected;
_carouselView.PropertyChanged -= _carouselView_PropertyChanged;
_carouselView.SelectedIndex = _position;
_carouselView.ItemAppearing += _carouselView_PositionSelected;
_carouselView.PropertyChanged += _carouselView_PropertyChanged;
_supressCarouselViewPositionChangedEvent = false;
}
}
}
protected virtual void OnPositionChanging(ref PositionChangingEventArgs e)
{
PositionChangingEventHandler handler = PositionChanging;
handler?.Invoke(this, e);
}