jumpToItem() and animateToItem() don't work if center and anchor are set

[simc]

I have a CustomScrollView with two SuperSliverLists and they are centered in the CustomScrollView using the center and anchor properties. For both lists jumpToItem() and animateToItem() either don't work at all or jump to the wrong index.

CustomScrollView(
  controller: controller,
  center: centerKey,
  anchor: 0.5,
  cacheExtent: 2000,
  slivers: [
    SuperSliverList(
      listController: listController1,
      ...,
    ),
    SuperSliverList(
      key: centerKey,
      listController: listController2,
      ...,
    ),
  ],
),

[knopp]

Mixing normal and reverse growth direction slivers in single scroll view is not supported. This seems pretty difficult to do since the slivers before affect the target scroll position. That said, if somebody submits a PR for this I'll be more than happy to review :)

[xsahil03x]

Hey @simc , have you found any alternative yet? Thanks