private void _carouselView_PropertyChanged(object sender, PropertyChangedEventArgs e)
{
if (e.PropertyName == nameof(_carouselView.Position) && !_supressCarouselViewPositionChangedEvent)
{
var positionChangingArgs = new PositionChangingEventArgs()
{
Canceled = false,
NewPosition = _carouselView.Position,
OldPosition = SelectedTabIndex
};
OnPositionChanging(ref positionChangingArgs);
if (positionChangingArgs != null && positionChangingArgs.Canceled)
{
_supressCarouselViewPositionChangedEvent = true;
_carouselView.PositionSelected -= _carouselView_PositionSelected;
_carouselView.PropertyChanged -= _carouselView_PropertyChanged;
_carouselView.Position = SelectedTabIndex;
_carouselView.PositionSelected += _carouselView_PositionSelected;
_carouselView.PropertyChanged += _carouselView_PropertyChanged;
_supressCarouselViewPositionChangedEvent = false;
}
SetPosition(positionChangingArgs.NewPosition);
}
}
public void SetPosition(int position)
{
int oldPosition = _position;
var positionChangingArgs = new PositionChangingEventArgs()
{
Canceled = false,
NewPosition = position,
OldPosition = oldPosition
};
OnPositionChanging(ref positionChangingArgs);
if (positionChangingArgs != null && positionChangingArgs.Canceled)
{
return;
}
if (position >= 0 && position < ItemSource.Count)
{
for (int i = 0; i < ItemSource.Count; i++)
{
ItemSource[i].IsCurrent = i == position;
}
_carouselView.PositionSelected -= _carouselView_PositionSelected;
_carouselView.Position = position;
_carouselView.PositionSelected += _carouselView_PositionSelected;
_position = position;
}
var positionChangedArgs = new PositionChangedEventArgs()
{
NewPosition = _position,
OldPosition = oldPosition
};
OnPositionChanged(positionChangedArgs);
}
protected virtual void OnPositionChanging(ref PositionChangingEventArgs e)
{
PositionChangingEventHandler handler = PositionChanging;
handler?.Invoke(this, e);
}
