GridView.extent constructor

GridView.extent({Key key, Axis scrollDirection: Axis.vertical, bool reverse: false, ScrollController controller, bool primary, ScrollPhysics physics, bool shrinkWrap: false, EdgeInsetsGeometry padding, @required double maxCrossAxisExtent, double mainAxisSpacing: 0.0, double crossAxisSpacing: 0.0, double childAspectRatio: 1.0, bool addAutomaticKeepAlives: true, bool addRepaintBoundaries: true, bool addSemanticIndexes: true, List<Widget> children: const [], int semanticChildCount, DragStartBehavior dragStartBehavior: DragStartBehavior.start })

Creates a scrollable, 2D array of widgets with tiles that each have a maximum cross-axis extent.

Uses a SliverGridDelegateWithMaxCrossAxisExtent 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:


  Key key,
  Axis scrollDirection = Axis.vertical,
  bool reverse = false,
  ScrollController controller,
  bool primary,
  ScrollPhysics physics,
  bool shrinkWrap = false,
  EdgeInsetsGeometry padding,
  @required double maxCrossAxisExtent,
  double mainAxisSpacing = 0.0,
  double crossAxisSpacing = 0.0,
  double childAspectRatio = 1.0,
  bool addAutomaticKeepAlives = true,
  bool addRepaintBoundaries = true,
  bool addSemanticIndexes = true,
  List<Widget> children = const <Widget>[],
  int semanticChildCount,
  DragStartBehavior dragStartBehavior = DragStartBehavior.start,
}) : gridDelegate = SliverGridDelegateWithMaxCrossAxisExtent(
       maxCrossAxisExtent: maxCrossAxisExtent,
       mainAxisSpacing: mainAxisSpacing,
       crossAxisSpacing: crossAxisSpacing,
       childAspectRatio: childAspectRatio,
     childrenDelegate = SliverChildListDelegate(
       addAutomaticKeepAlives: addAutomaticKeepAlives,
       addRepaintBoundaries: addRepaintBoundaries,
       addSemanticIndexes: addSemanticIndexes,
       key: key,
       scrollDirection: scrollDirection,
       reverse: reverse,
       controller: controller,
       primary: primary,
       physics: physics,
       shrinkWrap: shrinkWrap,
       padding: padding,
       semanticChildCount: semanticChildCount ?? children.length,
       dragStartBehavior: dragStartBehavior,