GridView constructor Null safety
- {Key? key,
- Axis scrollDirection = Axis.vertical,
- bool reverse = false,
- ScrollController? controller,
- bool? primary,
- ScrollPhysics? physics,
- bool shrinkWrap = false,
- EdgeInsetsGeometry? padding,
- required SliverGridDelegate gridDelegate,
- bool addAutomaticKeepAlives = true,
- bool addRepaintBoundaries = true,
- bool addSemanticIndexes = true,
- double? cacheExtent,
- List<
Widget> children = const <Widget>[], - int? semanticChildCount,
- DragStartBehavior dragStartBehavior = DragStartBehavior.start,
- Clip clipBehavior = Clip.hardEdge,
- ScrollViewKeyboardDismissBehavior keyboardDismissBehavior = ScrollViewKeyboardDismissBehavior.manual,
- String? restorationId}
Creates a scrollable, 2D array of widgets with a custom SliverGridDelegate.
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.
Implementation
GridView({
super.key,
super.scrollDirection,
super.reverse,
super.controller,
super.primary,
super.physics,
super.shrinkWrap,
super.padding,
required this.gridDelegate,
bool addAutomaticKeepAlives = true,
bool addRepaintBoundaries = true,
bool addSemanticIndexes = true,
super.cacheExtent,
List<Widget> children = const <Widget>[],
int? semanticChildCount,
super.dragStartBehavior,
super.clipBehavior,
super.keyboardDismissBehavior,
super.restorationId,
}) : assert(gridDelegate != null),
childrenDelegate = SliverChildListDelegate(
children,
addAutomaticKeepAlives: addAutomaticKeepAlives,
addRepaintBoundaries: addRepaintBoundaries,
addSemanticIndexes: addSemanticIndexes,
),
super(
semanticChildCount: semanticChildCount ?? children.length,
);