HeroControllerScope class Null safety

An inherited widget to host a hero controller.

The hosted hero controller will be picked up by the navigator in the child subtree. Once a navigator picks up this controller, the navigator will bar any navigator below its subtree from receiving this controller.

The hero controller inside the HeroControllerScope can only subscribe to one navigator at a time. An assertion will be thrown if the hero controller subscribes to more than one navigators. This can happen when there are multiple navigators under the same HeroControllerScope in parallel.



HeroControllerScope({Key? key, required HeroController controller, required Widget child})
Creates a widget to host the input controller.
HeroControllerScope.none({Key? key, required Widget child})
Creates a widget to prevent the subtree from receiving the hero controller above.


child Widget
The widget below this widget in the tree.
final, inherited
controller HeroController?
The hero controller that is hosted inside this widget.
hashCode int
The hash code for this object.
@nonVirtual, read-only, inherited
key Key?
Controls how one widget replaces another widget in the tree.
final, inherited
runtimeType Type
A representation of the runtime type of the object.
read-only, inherited


createElement() InheritedElement
Inflates this configuration to a concrete instance.
debugDescribeChildren() List<DiagnosticsNode>
Returns a list of DiagnosticsNode objects describing this node's children.
@protected, inherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node.
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed.
toDiagnosticsNode({String? name, DiagnosticsTreeStyle? style}) DiagnosticsNode
Returns a debug representation of the object that is used by debugging tools and by DiagnosticsNode.toStringDeep.
toString({DiagnosticLevel minLevel = DiagnosticLevel.info}) String
A string representation of this object.
toStringDeep({String prefixLineOne = '', String? prefixOtherLines, DiagnosticLevel minLevel = DiagnosticLevel.debug}) String
Returns a string representation of this node and its descendants.
toStringShallow({String joiner = ', ', DiagnosticLevel minLevel = DiagnosticLevel.debug}) String
Returns a one-line detailed description of the object.
toStringShort() String
A short, textual description of this widget.
updateShouldNotify(covariant HeroControllerScope oldWidget) bool
Whether the framework should notify widgets that inherit from this widget.


operator ==(Object other) bool
The equality operator.
@nonVirtual, inherited

Static Methods

of(BuildContext context) HeroController?
Retrieves the HeroController from the closest HeroControllerScope ancestor.