DirectionalFocusAction class Null safety
An Action that moves the focus to the focusable node in the direction configured by the associated DirectionalFocusIntent.direction.
This is the Action associated with DirectionalFocusIntent and bound by default to the LogicalKeyboardKey.arrowUp, LogicalKeyboardKey.arrowDown, LogicalKeyboardKey.arrowLeft, and LogicalKeyboardKey.arrowRight keys in the WidgetsApp, with the appropriate associated directions.
- Inheritance
-
- Object
- Action<
DirectionalFocusIntent> - DirectionalFocusAction
Constructors
- DirectionalFocusAction()
- Creates a DirectionalFocusAction.
- DirectionalFocusAction.forTextField()
-
Creates a DirectionalFocusAction that ignores DirectionalFocusIntents
whose
ignoreTextFields
field is true.
Properties
-
callingAction
→ Action<
DirectionalFocusIntent> ? - The Action overridden by this Action.
- 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(
DirectionalFocusIntent 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.
-
invoke(
DirectionalFocusIntent intent) → void -
Called when the action is to be performed.
override
-
isEnabled(
DirectionalFocusIntent 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.
-
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