I'm setting selected element in s:List component with Actionscript, it works, but List doesn't scroll to selected item -- need to scroll with scrollbar or mouse. Is it possible to auto-scroll to selected item ? Thanks !
+2
A:
In flex-3 there is a scrollToIndex method and hence you can call
list.scrollToIndex(list.selectedIndex);
I believe this should work in flex-4 too.
Amarghosh
2009-10-22 04:42:06
Unfortunately, no. There's no such method in Spark List, but it's there for Halo List component. Flex 4 is evolving and still in Beta, hope this issue will be resolved.
Rodion Bykov
2009-10-29 11:23:48
A:
you'll probably want to access the List's scroller directly and do something like:
list.scroller.scrollRect.y = list.itemRenderer.height * index;
hth
Seth
shi11i
2009-11-06 20:07:35
+1
A:
Try the s:List method : ensureIndexIsVisible(index:int):void
an0nym0usc0ward
2009-11-06 20:17:38
Thanks, but it seems working in latest Flex 4 SDK builds only (Flex Builder 4 Beta 2). I realized I work with one of old builds that has no this method yet.
Rodion Bykov
2009-11-13 22:17:50
A:
You can multiply the height of an element by its index and pass this value to: yourListID.scroller.viewport.verticalScrollPositioin Works for me. FTQuest.
FT
2009-11-08 06:01:22
A:
I recently accomplished this in one of my projects by having a defined size for my items in the group..
<s:Scroller x="940" y="0" maxHeight="465" maxWidth="940" horizontalScrollPolicy="off" verticalScrollPolicy="off">
<s:HGroup id="tutPane" columnWidth="940" variableColumnWidth="false" gap="0" x="0" y="0">
</s:HGroup>
</s:Scroller>
Following this my button controls for manipulation worked by incrementing a private "targetindex" variable, then I called a checkAnimation function, which used the Animate class, in combo with a SimpleMotionPath and a comparison between tutpane.firstIndexInView and target index. This modified the "horizontalScrollPosition" of the group.
This allowed separate controls to essentially act as a scroll bar, but I had the requirement of sliding the control to view the selected item.. I believe this technique could work for automated selection of items as well