[scrollable_positioned_list] Scrollbar issue fix discussion

[k-s-t-i]

Problem description

Scrollable positioned list currently isn't compatible with the entire Scrollbar API since a ScrollController is necessary for some features of the API.

The following code works with a scrollbar. But not when isAlwaysShown is set to true.

return MediaQuery.removePadding(
      context: context,
      removeTop: true,
      removeBottom: true,
      child: Scrollbar(
        thickness: 8,
        radius: Radius.circular(4),
        interactive: true,
        child: ScrollablePositionedList.builder(
              itemCount: totalItems,
              itemScrollController: itemScrollController,
              itemPositionsListener: itemPositionsListener,
              initialScrollIndex:
                  selectedValue != null ? items.indexOf(selectedValue!) : 0,
              itemBuilder: (context, index) {
                return GestureDetector(
                  onTap: () => onSelect(items[index]),
                  child: Container(
                    color: getItemColor(index, context),
                    child: buildDropdownList(context, index),
                  ),
                );
              },
          ),
     ), 
);

Proposal

I am thinking of extending the ItemScrollController API like this:
bitstackapp@0466304. To provide access to the scroll controller.

Thoughts?

[k-s-t-i]

Would be happy to discuss other fixes to the issues. I don't think exposing the actual scroll controller should pose any issues.

[Eerey]

Without this change, I cannot use this plugin. We strongly depend on a Scrollbar. When can we expect exposing the ScrollController?

[lff5]

Yes, please!