Fix for 'dirty' error caused by scroll notifications during layout

[PatrickWulfe]

Previously if the widget was rebuilt, (by calling a modal bottom sheet in my case), and a scroll notification happened during that rebuild, you would receive a dirty state error. By moving the setStates to a microtask, it avoids this error.

[RichiB20]

Hi @PatrickWulfe , I tried to reproduce your scenario using the modal_bottom_sheet package. I use their example and I put the ScrollShadow above the ListView in ModalInsideModal class. In the application you find it in the "Bar Modal" example.
Trying in this way I not received any error, could you tell me if you use the ScrollShadow in another way?

My simple code is the following:

        child: ScrollShadow(
          child: ListView(
            reverse: reverse,
            // shrinkWrap: true,
            controller: PrimaryScrollController.of(context),
            physics: const BouncingScrollPhysics(),
            children: ListTile.divideTiles(
                context: context,
                tiles: List<Widget>.generate(
                  100,
                  (int index) => ListTile(
                    title: Text('Item $index'),
                    onTap: () => Navigator.of(context).push(
                      CupertinoSheetRoute<void>(
                        builder: (BuildContext context) =>
                            ModalInsideModal(reverse: reverse),
                      ),
                    ),
                  ),
                )).toList(),
          ),
        ),

Thank you

[rickypid]

Hi @PatrickWulfe,

Do you have any updates on this?