FMX-Android-D12 Scroll TListbox selected item into view

[Fudley 8]

FMX-Android-D12  Scroll TListbox selected item into view

 

What I've tried (where lb is a TListbox and newindex is the new itemindex):

 

1.

newindex := lb.selected.index;

lb.scrollby(0.0,lb.itemheight*newindex)

 

2.

oldindex := lb.ItemIndex;
rowheight := lb.Selected.Height;
lb.ViewportPosition :=  PointF(0,rowheight*oldindex) ;

 

3.

lb.ScrollToItem(lb.Selected);

 

 

Neither of these work. Please advise. Much thanks.

Edited 18 hours ago by Fudley
added scrolltoitem