private void UpdatePagerViewAfterPageRemove(PagerAnimated parentPager, Action <TData> callback)
{
if (parentPager.CurrentItem < _dataCollection.Count && parentPager.CurrentItem < _fragmentMap.Count)
{
_fragmentMap.Remove(parentPager.CurrentItem);
}
var removedItem = _dataCollection[parentPager.CurrentItem];
_dataCollection.RemoveAt(parentPager.CurrentItem);
NotifyDataSetChanged();
var position = parentPager.CurrentItem >= _fragmentMap.Count
? parentPager.CurrentItem - 1
: parentPager.CurrentItem;
Fragment nextFragment;
Fragment prevFragment;
if (_fragmentMap.TryGetValue(position + 1, out nextFragment))
{
parentPager.PageTransformer?.TransformPage(nextFragment.View,
parentPager.AnimationHorizontalPositionOffset + 1);
}
if (_fragmentMap.TryGetValue(position - 1, out prevFragment))
{
parentPager.PageTransformer?.TransformPage(prevFragment.View,
parentPager.AnimationHorizontalPositionOffset - 1);
}
callback?.Invoke(removedItem);
}
public void RemoveCurrentPage(PagerAnimated parentPager, Action <TData> callback)
{
var position = parentPager.CurrentItem;
Fragment page;
if (!_fragmentMap.TryGetValue(position, out page))
{
return;
}
var fadeoutAnim = new AlphaAnimation(1.0f, 0.0f)
{
Duration = 300
};
page.View.StartAnimation(fadeoutAnim);
page.View.PostDelayed(() => UpdatePagerViewAfterPageRemove(parentPager, callback), 300);
}