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
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