ReorderableFlex class

Reorderable (drag and drop) version of Flex, a widget that displays its draggable children in a one-dimensional array.

The ReorderableFlex widget has allows you to control the axis along which the children are placed (horizontal or vertical). This is referred to as the direction. If you know the main axis in advance, then consider using a ReorderableRow (if it's horizontal) or ReorderableColumn (if it's vertical) instead, because that will be less verbose.

In addition to other parameters in Flex's constructor, this widget also has header and footer for placing non-reorderable widgets at the top/left and bottom/right of the widget. If further control is needed, you can use buildItemsContainer to customize how each item is contained, or use buildDraggableFeedback to customize the feedback of the internal LongPressDraggable. Consider using ReorderableRow or ReorderableColumn instead using this widget directly.

All children must have a key.

See also:

Inheritance
Implementers

Constructors

ReorderableFlex({Key? key, Widget? header, Widget? footer, required List<Widget> children, required ReorderCallback onReorder, required Axis direction, Axis scrollDirection = Axis.vertical, EdgeInsets? padding, BuildItemsContainer? buildItemsContainer, BuildDraggableFeedback? buildDraggableFeedback, MainAxisAlignment mainAxisAlignment = MainAxisAlignment.start, NoReorderCallback? onNoReorder, ReorderStartedCallback? onReorderStarted, ScrollController? scrollController, bool needsLongPressDraggable = true, double draggingWidgetOpacity = 0.2, Duration? reorderAnimationDuration, Duration? scrollAnimationDuration, Widget draggedItemBuilder(BuildContext context, int index)?, bool ignorePrimaryScrollController = false})
Creates a reorderable list.

Properties

buildDraggableFeedback → BuildDraggableFeedback?
final
buildItemsContainer → BuildItemsContainer?
final
children → List<Widget>
The widgets to display.
final
direction → Axis
The Axis along which the list scrolls.
final
draggedItemBuilder → (Widget Function(BuildContext context, int index)?)
final
draggingWidgetOpacity → double
final
A non-reorderable footer widget to show after the list.
final
hashCode → int
The hash code for this object.
no setterinherited
A non-reorderable header widget to show before the list.
final
ignorePrimaryScrollController → bool
final
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
mainAxisAlignment → MainAxisAlignment
final
needsLongPressDraggable → bool
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
padding → EdgeInsets?
The amount of space by which to inset the children.
final
reorderAnimationDuration → Duration?
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
scrollAnimationDuration → Duration?
final
scrollController → ScrollController?
final
scrollDirection → Axis
final

Methods

createElement() → StatefulElement
Creates a StatefulElement to manage this widget's location in the tree.
inherited
createState() → _ReorderableFlexState
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