How to disable drag scrolling but keep mouse wheel scrolling for ListView in Flutter MacOS?

Question

So when I set physics: const NeverScrollableScrollPhysics() on ListView.builder, it also disables mouse wheel scrolling. Is there a way to keep mouse wheel but disable drag?

Thanks

Answer 1

Thanks for the answer (@HasilT), it helped! I found that PointerScrollEvent.scrollDelta is already "animated", and you can use it with ScrollController.jumpTo. In my code, I prevent overscroll with min and max functions.

import 'dart:math' as math;

Listener(
  onPointerSignal: (ps) {
    if (ps is PointerScrollEvent) {
      final newOffset = _controller.offset + ps.scrollDelta.dy;
      if (ps.scrollDelta.dy.isNegative) {
        _controller.jumpTo(math.max(0, newOffset));
      } else {
        _controller
            .jumpTo(math.min(_controller.position.maxScrollExtent, newOffset));
      }
    }
  },
  child: ListView.builder(
    itemCount: 100,
    controller: _controller,
    physics: NeverScrollableScrollPhysics(),
    itemBuilder: (BuildContext context, int index) {
      return Container(
          height: 100,
          margin: EdgeInsets.all(10),
          color: index.isEven ? Colors.blue : Colors.green);
    },
  ),
);