BaseMouseTracker class Null safety

A base class that tracks the relationship between mouse devices and MouseTrackerAnnotations.

An event (not necessarily a pointer event) that might change the relationship between mouse devices and MouseTrackerAnnotations is called a device update.

MouseTracker is notified of device updates by updateWithEvent or updateAllDevices, and processes effects as defined in handleDeviceUpdate by subclasses.

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

See also:





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


addListener(VoidCallback listener) → void
Register a closure to be called when the object changes. [...]
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 and removeListener will throw after the object is disposed). [...]
@mustCallSuper, inherited
handleDeviceUpdate(MouseTrackerUpdateDetails details) → void
A callback that is called on the update of a device. [...]
@mustCallSuper, @protected
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed. [...]
notifyListeners() → void
Call all the registered listeners. [...]
@protected, @visibleForTesting, inherited
removeListener(VoidCallback listener) → void
Remove a previously registered closure from the list of closures that are notified when the object changes. [...]
toString() String
Returns a string representation of this object.
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. [...]


operator ==(Object other) bool
The equality operator. [...]