MouseTracker class Null safety

Tracks the relationship between mouse devices and annotations, and triggers mouse events and cursor changes accordingly.

The MouseTracker tracks the relationship between mouse devices and MouseTrackerAnnotation, notified by updateWithEvent and updateAllDevices. At every update, MouseTracker triggers the following changes if applicable:

This class is a ChangeNotifier that notifies its listeners if the value of mouseIsConnected changes.

An instance of MouseTracker is owned by the global singleton RendererBinding.

Inheritance

Constructors

hashCode → int: The hash code for this object.
read-onlyinherited
hasListeners → bool: Whether any listeners are currently registered.
protected">@protectedread-onlyinherited
mouseIsConnected → bool: Whether or not at least one mouse is connected and has produced events.
read-only
runtimeType → Type: A representation of the runtime type of the object.
read-onlyinherited

addListener(VoidCallback listener) → void: Register a closure to be called when the object changes.
inherited
debugDeviceActiveCursor(int device) → MouseCursor?: Returns the active mouse cursor for a device.
visibleForTesting">@visibleForTesting
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 (calls to addListener will throw after the object is disposed).
mustCallSuper">@mustCallSuperinherited
noSuchMethod(Invocation invocation) → dynamic: Invoked when a non-existent method or property is accessed.
inherited
notifyListeners() → void: Call all the registered listeners.
protected">@protectedvisibleForTesting">@visibleForTestinginherited
removeListener(VoidCallback listener) → void: Remove a previously registered closure from the list of closures that are notified when the object changes.
inherited
toString() → String: A string representation of this object.
inherited
updateAllDevices(MouseDetectorAnnotationFinder hitTest) → void: Trigger a device update for all detected devices.
updateWithEvent(PointerEvent event, ValueGetter<HitTestResult> getResult) → void: Trigger a device update with a new event and its corresponding hit test result.