public void ScrollTo(object item, object group, ScrollToPosition position, bool animated)
{
VerticalCalendarScrollToRequestedEventArgs e = new VerticalCalendarScrollToRequestedEventArgs
{
Item = item,
Group = group,
Position = position,
Animated = animated
};
if (this.scrollToRequested.Count == 0)
{
scrollToDelayed = e;
}
else
{
this.scrollToRequested.ForEach(y => y.Invoke(this, e));
}
}
private void Element_ScrollToRequested(object sender, VerticalCalendarScrollToRequestedEventArgs e)
{
int position = this.Adapter.PositionFromViewModel(e.Item as VerticalCalendarRowViewModel);
if (e.Animated)
{
this.LayoutManager.SmoothScrollToPosition(this.Control, new RecyclerView.State(), position);
}
else
{
if (e.Position == ScrollToPosition.Start)
{
this.LayoutManager.ScrollToPosition(position);
}
else
{
this.LayoutManager.ScrollToPositionWithOffset(position, (int)this.Context.ToPixels(350));
}
}
}
private void Element_ScrollToRequested(object sender, VerticalCalendarScrollToRequestedEventArgs e)
{
int section, row;
if (this.Element.IsGroupingEnabled)
{
section = this.Element.ItemsSource.IndexOf(e.Group);
row = (this.Element.ItemsSource.ElementAt(section) as IEnumerable <object>).IndexOf(e.Item);
}
else
{
section = 0;
row = this.Element.ItemsSource.IndexOf(e.Item);
}
UITableViewScrollPosition position = 0;
switch (e.Position)
{
case ScrollToPosition.Center:
position = UITableViewScrollPosition.Middle;
break;
case ScrollToPosition.End:
position = UITableViewScrollPosition.Bottom;
break;
case ScrollToPosition.MakeVisible:
position = UITableViewScrollPosition.None;
break;
case ScrollToPosition.Start:
position = UITableViewScrollPosition.Top;
break;
}
this.scrollTo = () => this.Control.ScrollToRow(NSIndexPath.FromRowSection(row, section), position, e.Animated);
}
