ReorderableGridView class Null safety

Usage:

ReorderableGridView(
  crossAxisCount: 3,
  children: this.data.map((e) => buildItem("$e")).toList(),
  onReorder: (oldIndex, newIndex) {
    setState(() {
      final element = data.removeAt(oldIndex);
      data.insert(newIndex, element);
    });
  },
)

I think it's borrowing to pass those params. Will it to hard to calculate the position by delegator? not by crossAxis and spacing? And the SliverGridDelete need an constraint to get a layout but, I don't have the constraint, and that method look called by the framework. So I need the crossAxisCount, spacing to determine the pos.

Inheritance

Constructors

ReorderableGridView({Key? key, required ReorderCallback onReorder, DragWidgetBuilder? dragWidgetBuilder, ScrollSpeedController? scrollSpeedController, PlaceholderBuilder? placeholderBuilder, OnDragStart? onDragStart, required SliverGridDelegate gridDelegate, required SliverChildDelegate childrenDelegate, bool reverse = false, bool? primary, ScrollPhysics? physics, bool shrinkWrap = false, EdgeInsetsGeometry? padding, double? cacheExtent, int? semanticChildCount, ScrollViewKeyboardDismissBehavior keyboardDismissBehavior = ScrollViewKeyboardDismissBehavior.manual, String? restorationId, Clip clipBehavior = Clip.hardEdge, ScrollController? controller, DragStartBehavior dragStartBehavior = DragStartBehavior.start, Duration? dragStartDelay, bool? dragEnabled})
ReorderableGridView.builder({Key? key, required ReorderCallback onReorder, ScrollSpeedController? scrollSpeedController, DragWidgetBuilder? dragWidgetBuilder, PlaceholderBuilder? placeholderBuilder, OnDragStart? onDragStart, bool reverse = false, ScrollController? controller, bool? primary, ScrollPhysics? physics, bool shrinkWrap = false, EdgeInsetsGeometry? padding, required SliverGridDelegate gridDelegate, required IndexedWidgetBuilder itemBuilder, int? itemCount, bool addAutomaticKeepAlives = true, bool addRepaintBoundaries = true, bool addSemanticIndexes = true, double? cacheExtent, int? semanticChildCount, DragStartBehavior dragStartBehavior = DragStartBehavior.start, ScrollViewKeyboardDismissBehavior keyboardDismissBehavior = ScrollViewKeyboardDismissBehavior.manual, String? restorationId, Clip clipBehavior = Clip.hardEdge, Duration? dragStartDelay, bool? dragEnabled})
ReorderableGridView.count({Key? key, required ReorderCallback onReorder, DragWidgetBuilder? dragWidgetBuilder, ScrollSpeedController? scrollSpeedController, PlaceholderBuilder? placeholderBuilder, OnDragStart? onDragStart, List<Widget>? footer, List<Widget>? header, double mainAxisSpacing = 0.0, double crossAxisSpacing = 0.0, double childAspectRatio = 1.0, double? mainAxisExtent, bool reverse = false, ScrollController? controller, bool? primary, ScrollPhysics? physics, bool shrinkWrap = false, EdgeInsetsGeometry? padding, required int crossAxisCount, bool addAutomaticKeepAlives = true, bool addRepaintBoundaries = true, bool addSemanticIndexes = true, double? cacheExtent, List<Widget> children = const <Widget>[], int? semanticChildCount, DragStartBehavior dragStartBehavior = DragStartBehavior.start, ScrollViewKeyboardDismissBehavior keyboardDismissBehavior = ScrollViewKeyboardDismissBehavior.manual, String? restorationId, Clip clipBehavior = Clip.hardEdge, Duration? dragStartDelay, bool? dragEnabled})

Properties

cacheExtent double?
final
childrenDelegate SliverChildDelegate
final
clipBehavior Clip
final
controller ScrollController?
final
dragEnabled bool?
final
dragStartBehavior DragStartBehavior
final
dragStartDelay Duration?
final
dragWidgetBuilder DragWidgetBuilder?
final
gridDelegate SliverGridDelegate
final
hashCode int
The hash code for this object.
@nonVirtual, read-only, inherited
key Key?
Controls how one widget replaces another widget in the tree.
final, inherited
keyboardDismissBehavior ScrollViewKeyboardDismissBehavior
final
onDragStart OnDragStart?
final
onReorder ReorderCallback
final
padding EdgeInsetsGeometry?
final
physics ScrollPhysics?
final
placeholderBuilder PlaceholderBuilder?
final
primary bool?
final
restorationId String?
final
reverse bool
final
runtimeType Type
A representation of the runtime type of the object.
read-only, inherited
scrollSpeedController ScrollSpeedController?
final
semanticChildCount int?
final
shrinkWrap bool
final

Methods

build(BuildContext context) Widget
Describes the part of the user interface represented by this widget.
override
createElement() StatelessElement
Creates a StatelessElement to manage this widget's location in the tree.
inherited
debugDescribeChildren() List<DiagnosticsNode>
Returns a list of DiagnosticsNode objects describing this node's children.
@protected, inherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node.
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed.
inherited
toDiagnosticsNode({String? name, DiagnosticsTreeStyle? style}) DiagnosticsNode
Returns a debug representation of the object that is used by debugging tools and by DiagnosticsNode.toStringDeep.
inherited
toString({DiagnosticLevel minLevel = DiagnosticLevel.info}) String
A string representation of this object.
inherited
toStringDeep({String prefixLineOne = '', String? prefixOtherLines, DiagnosticLevel minLevel = DiagnosticLevel.debug}) String
Returns a string representation of this node and its descendants.
inherited
toStringShallow({String joiner = ', ', DiagnosticLevel minLevel = DiagnosticLevel.debug}) String
Returns a one-line detailed description of the object.
inherited
toStringShort() String
A short, textual description of this widget.
inherited

Operators

operator ==(Object other) bool
The equality operator.
@nonVirtual, inherited