WaterfallFlow constructor

  1. Key? key,
  2. Axis scrollDirection = Axis.vertical,
  3. bool reverse = false,
  4. ScrollController? controller,
  5. bool? primary,
  6. ScrollPhysics? physics,
  7. bool shrinkWrap = false,
  8. EdgeInsetsGeometry? padding,
  9. required SliverWaterfallFlowDelegate gridDelegate,
  10. bool addAutomaticKeepAlives = true,
  11. bool addRepaintBoundaries = true,
  12. bool addSemanticIndexes = true,
  13. double? cacheExtent,
  14. List<Widget> children = const <Widget>[],
  15. int? semanticChildCount,
  16. DragStartBehavior dragStartBehavior = DragStartBehavior.start,
  17. ScrollViewKeyboardDismissBehavior keyboardDismissBehavior = ScrollViewKeyboardDismissBehavior.manual,
  18. String? restorationId,
  19. Clip clipBehavior = Clip.hardEdge,

Creates a scrollable, 2D array of widgets whose size is variable in the main axis with a custom SliverWaterfallFlowDelegate.

The gridDelegate argument must not be null.

The addAutomaticKeepAlives argument corresponds to the SliverChildListDelegate.addAutomaticKeepAlives property. The addRepaintBoundaries argument corresponds to the SliverChildListDelegate.addRepaintBoundaries property. Both must not be null.


  Key? key,
  Axis scrollDirection = Axis.vertical,
  bool reverse = false,
  ScrollController? controller,
  bool? primary,
  ScrollPhysics? physics,
  bool shrinkWrap = false,
  EdgeInsetsGeometry? padding,
  required this.gridDelegate,
  bool addAutomaticKeepAlives = true,
  bool addRepaintBoundaries = true,
  bool addSemanticIndexes = true,
  double? cacheExtent,
  List<Widget> children = const <Widget>[],
  int? semanticChildCount,
  DragStartBehavior dragStartBehavior = DragStartBehavior.start,
  ScrollViewKeyboardDismissBehavior keyboardDismissBehavior =
  String? restorationId,
  Clip clipBehavior = Clip.hardEdge,
})  : childrenDelegate = SliverChildListDelegate(
        addAutomaticKeepAlives: addAutomaticKeepAlives,
        addRepaintBoundaries: addRepaintBoundaries,
        addSemanticIndexes: addSemanticIndexes,
        key: key,
        scrollDirection: scrollDirection,
        reverse: reverse,
        controller: controller,
        primary: primary,
        physics: physics,
        shrinkWrap: shrinkWrap,
        padding: padding,
        cacheExtent: cacheExtent,
        semanticChildCount: semanticChildCount ?? children.length,
        dragStartBehavior: dragStartBehavior,
        keyboardDismissBehavior: keyboardDismissBehavior,
        restorationId: restorationId,
        clipBehavior: clipBehavior,