ExtendedGridView.count constructor

ExtendedGridView.count({
  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 int crossAxisCount,
  10. double mainAxisSpacing = 0.0,
  11. double crossAxisSpacing = 0.0,
  12. double childAspectRatio = 1.0,
  13. bool addAutomaticKeepAlives = true,
  14. bool addRepaintBoundaries = true,
  15. bool addSemanticIndexes = true,
  16. double? cacheExtent,
  17. List<Widget> children = const <Widget>[],
  18. int? semanticChildCount,
  19. DragStartBehavior dragStartBehavior = DragStartBehavior.start,
  20. required ExtendedListDelegate extendedListDelegate,
  21. ScrollViewKeyboardDismissBehavior keyboardDismissBehavior = ScrollViewKeyboardDismissBehavior.manual,
  22. String? restorationId,
  23. Clip clipBehavior = Clip.hardEdge,
})

Creates a scrollable, 2D array of widgets with a fixed number of tiles in the cross axis.

Uses a SliverGridDelegateWithFixedCrossAxisCount as the gridDelegate.

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

See also:

  • new SliverGrid.count, the equivalent constructor for SliverGrid.

Implementation

ExtendedGridView.count({
  Key? key,
  Axis scrollDirection = Axis.vertical,
  bool reverse = false,
  ScrollController? controller,
  bool? primary,
  ScrollPhysics? physics,
  bool shrinkWrap = false,
  EdgeInsetsGeometry? padding,
  required int crossAxisCount,
  double mainAxisSpacing = 0.0,
  double crossAxisSpacing = 0.0,
  double childAspectRatio = 1.0,
  bool addAutomaticKeepAlives = true,
  bool addRepaintBoundaries = true,
  bool addSemanticIndexes = true,
  double? cacheExtent,
  List<Widget> children = const <Widget>[],
  int? semanticChildCount,
  DragStartBehavior dragStartBehavior = DragStartBehavior.start,
  required this.extendedListDelegate,
  ScrollViewKeyboardDismissBehavior keyboardDismissBehavior =
      ScrollViewKeyboardDismissBehavior.manual,
  String? restorationId,
  Clip clipBehavior = Clip.hardEdge,
})  : gridDelegate = SliverGridDelegateWithFixedCrossAxisCount(
        crossAxisCount: crossAxisCount,
        mainAxisSpacing: mainAxisSpacing,
        crossAxisSpacing: crossAxisSpacing,
        childAspectRatio: childAspectRatio,
      ),
      childrenDelegate = SliverChildListDelegate(
        children,
        addAutomaticKeepAlives: addAutomaticKeepAlives,
        addRepaintBoundaries: addRepaintBoundaries,
        addSemanticIndexes: addSemanticIndexes,
      ),
      super(
        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,
      );