VoidCallbackAction class Null safety

An Action that invokes the VoidCallback given to it in the VoidCallbackIntent passed to it when invoked.

See also:

  • CallbackAction, which is an action that will invoke a callback with the intent passed to the action's invoke method. The callback is configured on the action, not the intent, like this class.
Inheritance

Constructors

VoidCallbackAction()

Properties

callingAction → Action<VoidCallbackIntent>?
The Action overridden by this Action.
protected">@protectedread-onlyinherited
hashCode → int
The hash code for this object.
read-onlyinherited
intentType → Type
Gets the type of intent this action responds to.
read-onlyinherited
isActionEnabled → bool
Whether this Action is inherently enabled.
read-onlyinherited
runtimeType → Type
A representation of the runtime type of the object.
read-onlyinherited

Methods

addActionListener(ActionListenerCallback listener) → void
Register a callback to listen for changes to the state of this action.
mustCallSuper">@mustCallSuperinherited
consumesKey(VoidCallbackIntent 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.
mustCallSuper">@mustCallSuperprotected">@protectedinherited
invoke(VoidCallbackIntent intent) → Object?
Called when the action is to be performed.
override
isEnabled(VoidCallbackIntent intent) → bool
Returns true if the action is enabled and is ready to be invoked.
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed.
inherited
notifyActionListeners() → void
Call all the registered listeners.
protected">@protectedvisibleForTesting">@visibleForTestinginherited
removeActionListener(ActionListenerCallback listener) → void
Remove a previously registered closure from the list of closures that are notified when the object changes.
mustCallSuper">@mustCallSuperinherited
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
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