ContextAction<T extends Intent> class abstract

An abstract Action subclass that adds an optional BuildContext to the isEnabled and invoke methods to be able to provide context to actions.

ActionDispatcher.invokeAction checks to see if the action it is invoking is a ContextAction, and if it is, supplies it with a context.

Inheritance
Implementers

Constructors

ContextAction()

Properties

callingAction Action<T>?
The Action overridden by this Action.
no setterinherited
hashCode int
The hash code for this object.
no setterinherited
intentType Type
Gets the type of intent this action responds to.
no setterinherited
isActionEnabled bool
Whether this Action is inherently enabled.
no setterinherited
runtimeType Type
A representation of the runtime type of the object.
no setterinherited

Methods

addActionListener(ActionListenerCallback listener) → void
Register a callback to listen for changes to the state of this action.
inherited
consumesKey(T intent) bool
Indicates whether this action should treat key events mapped to this action as being "handled" when it is invoked via the key event.
inherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node.
inherited
invoke(T intent, [BuildContext? context]) Object?
Called when the action is to be performed.
override
isEnabled(T intent, [BuildContext? context]) bool
Returns true if the action is enabled and is ready to be invoked.
override
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
notifyActionListeners() → void
Call all the registered listeners.
inherited
removeActionListener(ActionListenerCallback listener) → void
Remove a previously registered closure from the list of closures that are notified when the object changes.
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
toKeyEventResult(T intent, covariant Object? invokeResult) KeyEventResult
Converts the result of invoke of this action to a KeyEventResult.
inherited
toString({DiagnosticLevel minLevel = DiagnosticLevel.info}) String
A string representation of this object.
inherited
toStringShort() String
A brief description of this object, usually just the runtimeType and the hashCode.
inherited

Operators

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