HintTarget class

Registers a target with the engine.

A thin wrapper: registers in initState, unregisters in dispose (self-cancellation by identity — disposing an old instance does not remove a new owner of the same id), renders the child through CompositedTransformTarget — the leader the overlay's follower follows every frame. Zero repaints outside a tour: in idle this is one direct child plus a thin leader render object.

Identification is by string id, not GlobalKey. The State creates its own LayerLink (id is the external key, link is internal mechanics).

Inheritance

Constructors

HintTarget({Key? key, required String id, required Widget child, HintTargetRegistry? registry, String? semanticsLabel})
const

Properties

child → Widget
final
hashCode → int
The hash code for this object.
no setterinherited
id → String
Key in the target registry.
final
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
registry → HintTargetRegistry?
Registry; defaults to HintTargetRegistry.defaultInstance (zero-config).
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
semanticsLabel → String?
Screen-reader label; null — no Semantics wrapper (a cheap option that does not touch the tree in the common case).
final

Methods

createElement() → StatefulElement
Creates a StatefulElement to manage this widget's location in the tree.
inherited
createState() → State<HintTarget>
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, int wrapWidth = 65}) → 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