builder property

ScrollableWidgetBuilder builder

final

build inner widget in panel. pass PanelScrollController instance to scrollController.

builder: (context, controller) {
  return SingleChildScrollView(
    controller: controller,
    child: InnerView(),
  );
},

can't drag panel if builder callback return non Scrollable widget. if you want drag to expand, need to return Scrollable widget.

Implementation

final ScrollableWidgetBuilder builder;