scrollTo method

void scrollTo(Offset offset)

Scrolls to the specified offset

final GlobalKey<InteractiveScrollViewerState> _interactiveViewerKey =
GlobalKey();
TransformationController transformationController=
TransformationController();
@override
Widget build(BuildContext context) {
 return Scaffold(
     appBar: AppBar(
       title: const Text('InteractiveScrollViewer'),
       actions: <Widget>[
         IconButton(
           icon: const Icon(
             Icons.arrow_circle_down,
             color: Colors.white,
           ),
           onPressed: () {
           _interactiveViewerKey.currentState?.scrollTo(Offset(150,2000));
           },
         ),
       ],
     ),
     body: InteractiveScrollViewer(
       Image.network('https://picsum.photos/250?image=9'),
       key: _interactiveViewerKey,
       transformationController: transformationController,
     ));
}

Implementation

void scrollTo(Offset offset) {
  if (widget.transformationController != null) {
    final Offset previousOffset =
        widget.transformationController!.toScene(Offset.zero);
    widget.transformationController?.value =
        widget.transformationController!.value.clone()
          ..translate(
              previousOffset.dx - offset.dx, previousOffset.dy - offset.dy);
  }
}