Owns SemanticsNode objects and notifies listeners of changes to the render tree semantics.
To listen for semantic updates, call PipelineOwner.addSemanticsListener,
which will create a SemanticsOwner if necessary.
- Inheritance
- Object
- Listenable
- ChangeNotifier
- SemanticsOwner
Constructors
Properties
- rootSemanticsNode → SemanticsNode
-
The root node of the semantics tree, if any.
read-only - hashCode → int
-
Get a hash code for this object.
read-only, inherited - runtimeType → Type
-
A representation of the runtime type of the object.
read-only, inherited
Operators
-
operator ==(
other) → bool -
The equality operator.
inherited
Methods
-
dispose(
) → void -
Discards any resources used by the object. After this is called, the object is not in a usable state and should be discarded.
-
performAction(
int id, SemanticsAction action) → void -
Asks the SemanticsNode with the given id to perform the given action.
-
performActionAt(
Point position, SemanticsAction action) → void -
Asks the SemanticsNode with at the given position to perform the given action.
-
sendSemanticsUpdate(
) → void -
Update the semantics using
ui.window.updateSemantics. -
addListener(
VoidCallback listener) → void -
Register a closure to be called when the object changes.
inherited -
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a non-existent method or property is accessed.
inherited -
notifyListeners(
) → void -
Call all the registered listeners.
inherited -
removeListener(
VoidCallback listener) → void -
Remove a previously registered closure from the list of closures that are notified when the object changes.
inherited -
toString(
) → String -
Returns a string representation of this object.
inherited