Inheritable<T> class

Similar to InheritedModel provides a way to listen to certain aspects of T.

This moves the decision of whether a dependent should be updated or not to itself. As opposed to many other unconditional implementations of InheritedWidget

This uses a generic InheritableAspect to determine whether a dependent should be notified.

You can provide any implementation of InheritableAspect or use one of the built-ins such as Aspect.

Note that, contrary to InheritedModel, this does not allow depending without specifying a valid aspect. A valid aspect is determined by isSupportedAspect.

Inheritance

Constructors

Inheritable({required T value, Key? key, Widget? child}): Create an access point in widget tree to supply value to descendants.
const
Inheritable.mutable({required ValueChanged<T> onMutate, required T value, Key key, Widget child}): Mutable variant of Inheritable, users are to provide onMutate to allow value to change.
const

factory

Properties

child → Widget: The widget below this widget in the tree.
finalinherited
hashCode → int: The hash code for this object.
no setterinherited
key → Key?: Controls how one widget replaces another widget in the tree.
finalinherited
overrides → Set<AspectOverride<Object, T>>: Ant overrides for this Inheritable
no setter
runtimeType → Type: A representation of the runtime type of the object.
no setterinherited

Methods

copyWith({Key? key, T? value, Set<AspectOverride<Object, T>>? overrides, Widget? child}) → Inheritable<T>: Create a new Inheritable of T with it's properties changed with the supplied values
createElement() → _InheritableElement<T>: Inflates this configuration to a concrete instance.
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
isSupportedAspect(InheritableAspect<T> aspect) → bool: Whether given aspect is supported by this. By default all non-null aspects are supported
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
updateShouldNotify(covariant Inheritable<T> oldWidget) → bool: Whether the framework should notify widgets that inherit from this widget.
override
updateShouldNotifyDependent(Inheritable<T> oldWidget, Iterable<DependableAspect<T>> dependencies) → bool: Similar to InheritedModel.updateShouldNotifyDependent
valueFor<A>(InheritableAspect<T> aspect, [A transform(T)?]) → A: Get the value for given aspect. This checks for any overrides, and provides the overridden value if there is one, or _value by transform

Operators

operator ==(Object other) → bool: The equality operator.
inherited

Static Methods

ignoreMutation(Object? obj) → void: Convenience method when Inheritable.mutable should ignore all mutations
newOverridesSet<T>(Set<AspectOverride<Object?, T>>? other) → Set<Object>
of<T>(BuildContext context, {required InheritableAspect<T> aspect, bool rebuild = true, bool nullOk = true, bool mutable = false}) → Inheritable<T>?: Get the nearest enclosing Inheritable for T to context.
override<T, SubType extends T>({required SubType value, Key? key, Set<AspectOverride<Object?, T>>? overrides, ValueChanged<T>? onMutate, Widget? child, bool strict = true}) → Inheritable<T>: Create an Inheritable that overrides T with given value for the widget sub-tree.
supply({required List<Inheritable<Object?>> inheritables, Widget? child, bool strict = true}) → Widget: Convenience method to supply multiple Inheritables holding different values to child