ReorderableSliverList class

Reorderable (drag and drop) version of SliverList, a widget that places multiple box draggable children in a linear array along the main axis.

A ScrollController must be explicitly provided to CustomScrollView when wrapping the widget with a CustomScrollView.

{@tool sample}

This sample shows how to create a reorderable sliver list with a sliver app bar.

CustomScrollView(
 // a ScrollController must be included in CustomScrollView, otherwise
 // ReorderableSliverList won't work
 controller: _scrollController,
 slivers: <Widget>[
   SliverAppBar(
     expandedHeight: 210.0,
     flexibleSpace: FlexibleSpaceBar(
       title: Text('ReorderableSliverList'),
       background: Image.network(
         'https://upload.wikimedia.org/wikipedia/commons/thumb/6/68/Yushan'
           '_main_east_peak%2BHuang_Chung_Yu%E9%BB%83%E4%B8%AD%E4%BD%91%2B'
           '9030.png/640px-Yushan_main_east_peak%2BHuang_Chung_Yu%E9%BB%83'
           '%E4%B8%AD%E4%BD%91%2B9030.png'),
     ),
   ),
   ReorderableSliverList(
     delegate: ReorderableSliverChildListDelegate(_rows),
     // or use ReorderableSliverChildBuilderDelegate if needed
     //delegate: ReorderableSliverChildBuilderDelegate(
     //  (BuildContext context, int index) => _rows[index],
     //  childCount: _rows.length
     //),
     onReorder: _onReorder,
   )
 ],
)

{@end-tool}

See also:

Inheritance

Constructors

ReorderableSliverList({required SliverChildDelegate delegate, required ReorderCallback onReorder, BuildItemsContainer? buildItemsContainer, BuildDraggableFeedback? buildDraggableFeedback, NoReorderCallback? onNoReorder, ReorderStartedCallback? onReorderStarted, VoidCallback? onDragStart, VoidCallback? onDragEnd, bool enabled = true, Key? key})
Creates a reorderable list.

Properties

buildDraggableFeedback → BuildDraggableFeedback?
final
buildItemsContainer → BuildItemsContainer?
final
delegate → SliverChildDelegate
The delegate that provides the children for this widget.
final
enabled → bool
Sets whether the children are reorderable or not
final
hashCode → int
The hash code for this object.
no setterinherited
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
onDragEnd → VoidCallback?
Called when the drag process has ended, either via Draggable.onDraggableCanceled or Draggable.onDragCompleted
final
onDragStart → VoidCallback?
Called when a drag process is started
final
onNoReorder → NoReorderCallback?
final
onReorder → ReorderCallback
Called when a child is dropped into a new position to shuffle the children.
final
onReorderStarted → ReorderStartedCallback?
Called when the draggable starts being dragged.
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited

Methods

createElement() → StatefulElement
Creates a StatefulElement to manage this widget's location in the tree.
inherited
createState() → _ReorderableSliverListState
Creates the mutable state for this widget at a given location in the tree.
override
debugDescribeChildren() → List<DiagnosticsNode>
Returns a list of DiagnosticsNode objects describing this node's children.
inherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node.
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent 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.
inherited