CollectionView scroll if selected item not visible

FMX TMS iCL
1
Hi,

I select an Item by code:

ACollectionView.SelectItem(ASection,ARow,spCollectionViewScrollPositionNone,false);

This item can be outside the visible area.
Only when the selected item is not visible on screen I want to scroll to it:

if ItemNotVisible then begin <- ?

  if ARow < AOldRow then
    ACollection.ScrollToItem(ASection,ARow,spCollectionViewScrollPositionTop,true)
  else
    ACollection.ScrollToItem(ASection,ARow,spCollectionViewScrollPositionBottom,true);

end;


How can I implement the function ItemNotVisible ?

Thanks in advance,
Dietrich

2

ACollectionView.visibleItems seems to be emty at all times ...

3

It seems very strange that VisibleItems is empty at all times. This should at least be filled with the visible items. Can you log the contents, or the count?

4
sorry,

Count(ACollection.visibleItems) gives the number of visible items!
5
again sorry:

Length(ACollection.VisibleItems)