private IndexRange CalculateVisibleItemsRange()
{
if (this.itemsPerPage == 0)
{
return(new IndexRange());
}
int position = this.PositionToItemIndex(this.position + 0.01f);
int endPosition = this.PositionToItemIndex((this.position + this.pageSize) - 0.01f);
if ((position >= 0) && (endPosition == -1))
{
endPosition = this.itemsCount - 1;
}
return(IndexRange.CreateFromBeginAndEnd(position, endPosition));
}
private IndexRange CalculateScreenRange() => IndexRange.CreateFromBeginAndEnd(this.PositionToItemIndexUnclamped(this.position + 0.01f), this.PositionToItemIndexUnclamped((this.position + this.pageSize) - 0.01f));