DraggableScrollableActuatorModifier class

A widget that can notify a descendent DraggableScrollableSheet that it should reset its position to the initial state.

The Scaffold uses this widget to notify a persistent bottom sheet that the user has tapped back if the sheet has started to cover more of the body than when at its initial position. This is important for users of assistive technology, where dragging may be difficult to communicate.

This is just a wrapper on top of DraggableScrollableController. It is primarily useful for controlling a sheet in a part of the widget tree that the current code does not control (e.g. library code trying to affect a sheet in library users' code). Generally, it's easier to control the sheet directly by creating a controller and passing the controller to the sheet in its constructor (see DraggableScrollableSheet.controller).

Inheritance

• Object
• DiagnosticableTree
• Widget
• StatelessWidget
• SingleChildStatelessModifier
• DraggableScrollableActuatorModifier

Available extensions

• ModifierTransformer

Constructors

DraggableScrollableActuatorModifier({Key? key, Widget? child, Key? modifierKey})

Creates a widget that can notify descendent DraggableScrollableSheets to reset to their initial position.

const

Properties

hashCode → int

The hash code for this object.

no setter, inherited

key → Key?

Controls how one widget replaces another widget in the tree.

final, inherited

modifierKey → Key?

The actual key of the widget, which Modifier wrapped

final, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

build(BuildContext context) → Widget

Describes the part of the user interface represented by this widget.

inherited

buildWithChild(BuildContext context, Widget? child) → Widget

A build method that receives an extra child parameter.

override

createElement() → SingleChildStatelessElement

Create a SingleChildStatelessElement

inherited

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