ReorderableWrapController class

Handles drag and drop of the children in ReorderableBuilder.wrap.

Children in a Wrap can have different sizes, so swapping the positions of two colliding children would let them overlap. Instead, the positions of all children are recalculated like a Wrap would lay them out.

Inheritance

• Object
• ReorderableController
• ReorderableDragAndDropController
• ReorderableBuilderController
• ReorderableWrapController

Constructors

ReorderableWrapController()

Properties

builtKeyValues → Set<String>

Key values of children built since the item count decreased.

final, inherited

childrenKeyMap → Map<String, ReorderableEntity>

final, inherited

childrenOrderMap → Map<int, ReorderableEntity>

final, inherited

draggedEntity ↔ ReorderableEntity?

Instance of dragged entity when dragging starts.

getter/setter pair, inherited

draggingAnimationMap → Map<ValueKey, DraggingAnimationEntity>

Visible offsets of all children animated while dragging, by their key.

final, inherited

hashCode → int

The hash code for this object.

no setter, inherited

isScrollableOutside ↔ bool

Defines if the scrollable part is outside of the widget.

getter/setter pair, inherited

lastBuiltChildren → Map<String, Widget>

Last built widget of every child by its key value.

final, inherited

lastRemovedEntities ↔ List<ReorderableEntity>

Entities of the children removed by the last update of the children.

getter/setter pair, inherited

lockedIndices ↔ List<int>

Indices of children that cannot move while drag and drop.

getter/setter pair, inherited

offsetMap → Map<int, Offset>

final, inherited

positionChangeDelay ↔ Duration

Delay for position changes caused by removed children.

getter/setter pair, inherited

releasedReorderableEntity ↔ ReleasedReorderableEntity?

Entity that is released after drag and drop.

getter/setter pair, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

scrollDirection ↔ Axis?

Main axis of the grid, used when dragging before/after all children.

getter/setter pair, inherited

scrollOffset ↔ Offset

Holding this value for better performance.

getter/setter pair, inherited

startDraggingScrollOffset ↔ Offset

Saves the state of scroll Offset when the drag and drop is starting.

getter/setter pair, inherited

wrapKey → GlobalKey<State<StatefulWidget>>

Key of the Wrap returned by ReorderableBuilder.builder.

final

Methods

addBuiltChild({required ValueKey key, required Widget child}) → void

Saves child as the last built widget of key.

inherited

applyCollision({required ReorderableEntity? collision, required Offset draggedOffset}) → bool

Exchanges the dragged child with collision and lays out all children.

override

calculateWrapOffsets({required List<Size> sizes, required RenderWrap renderWrap}) → List<Offset>

Calculates the offsets of children with sizes like renderWrap would do.

getReorderableEntity({required ValueKey key, required int index}) → ReorderableEntity

Returns the entity of key at index with its known position.

override

handleCreatedChild({required Offset? offset, required Size size, required ReorderableEntity reorderableEntity}) → ReorderableEntity

Marks a measured child that changed its order as moved to animate it.

override

handleDragEnd() → List<ReorderUpdateEntity>?

Returns the moves from the order before dragging to the current order.

override

handleDragStarted({required ReorderableEntity reorderableEntity, required Offset currentScrollOffset, required List<int> lockedIndices, required bool isScrollableOutside, required int? itemCount, required Axis? scrollDirection}) → void

inherited

handleDragUpdate({required PointerMoveEvent pointerMoveEvent}) → bool

inherited

handleMovingFinished({required ReorderableEntity reorderableEntity}) → ReorderableEntity

Updates offset and order id of reorderableEntity faded in.

inherited

handleOpacityFinished({required ReorderableEntity reorderableEntity}) → ReorderableEntity

Updates offset and order id of reorderableEntity faded in.

inherited

handleSizeChanged() → void

Resets all entities in childrenOrderMap and childrenKeyMap.

inherited

initChildren({required List<Widget> children}) → void

Adds ReorderableEntity for all children to two maps.

inherited

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

removeBuiltChild({required ValueKey key, required Widget child}) → void

Removes child of key from lastBuiltChildren after it was disposed.

inherited

reorderList<T>({required List<T> items, required List<ReorderUpdateEntity> reorderUpdateEntities}) → List<T>

Reorders list of items that depends on reorderUpdateEntities.

inherited

replaceMaps({required Map<String, ReorderableEntity> updatedChildrenKeyMap, required Map<int, ReorderableEntity> updatedChildrenOrderMap}) → void

inherited

shortenMapsToItemCount({required int itemCount}) → void

Removes all children that have a higher position the itemCount.

inherited

toString() → String

A string representation of this object.

inherited

updateChildren({required List<Widget> children}) → void

Updates the children and measures the ones with a new position again.

override

updateToActualPositions() → void

Iterates through childrenKeyMap and updates ReorderableEntity.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited