Actions class

A widget that establishes an ActionDispatcher and a map of Intent to Action to be used by its descendants when invoking an Action.

Actions are typically invoked using Actions.invoke with the context containing the ambient Actions widget.

See also:

  • ActionDispatcher, the object that this widget uses to manage actions.
  • Action, a class for containing and defining an invocation of a user action.
  • Intent, a class that holds a unique LocalKey identifying an action, as well as configuration information for running the Action.
  • Shortcuts, a widget used to bind key combinations to Intents.


Actions({Key key, ActionDispatcher dispatcher, @required Map<Type, Action<Intent>> actions, @required Widget child})
Creates an Actions widget. [...]


actions Map<Type, Action<Intent>>
A map of Intent keys to Action<Intent> objects that defines which actions this widget knows about. [...]
child Widget
This widget can only have one child. To lay out multiple children, let this widget's child be a widget such as Row, Column, or Stack, which have a children property, and then provide the children to that widget.
dispatcher ActionDispatcher
The ActionDispatcher object that invokes actions. [...]
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() StatefulElement
Creates a StatefulElement to manage this widget's location in the tree. [...]
createState() State<Actions>
Creates the mutable state for this widget at a given location in the tree. [...]
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:}) String
Returns 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.


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

Static Methods

find<T extends Intent>(BuildContext context, {bool nullOk: false}) Action<T>
Finds the Action bound to the given intent type T in the given context. [...]
handler<T extends Intent>(BuildContext context, T intent, {bool nullOk: false}) VoidCallback
Returns a VoidCallback handler that invokes the bound action for the given intent if the action is enabled, and returns null if the action is not enabled. [...]
invoke<T extends Intent>(BuildContext context, T intent, {bool nullOk: false}) Object
Invokes the action associated with the given Intent using the Actions widget that most tightly encloses the given BuildContext. [...]
of(BuildContext context, {bool nullOk: false}) ActionDispatcher
Returns the ActionDispatcher associated with the Actions widget that most tightly encloses the given BuildContext. [...]