MouseTracker class

Keeps state about which objects are interested in tracking mouse positions and notifies them when a mouse pointer enters, moves, or leaves an annotated region that they are interested in.

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

Owned by the RendererBinding class.

Inheritance

Constructors

MouseTracker(PointerRouter router, MouseDetectorAnnotationFinder annotationFinder)
Creates a mouse tracker to keep track of mouse locations. [...]

Properties

annotationFinder MouseDetectorAnnotationFinder
Used to find annotations at a given logical coordinate.
final
mouseIsConnected bool
Whether or not a mouse is connected and has produced events.
read-only
hashCode int
The hash code for this object. [...]
read-only, inherited
hasListeners bool
Whether any listeners are currently registered. [...]
@protected, read-only, inherited
runtimeType Type
A representation of the runtime type of the object.
read-only, inherited

Methods

attachAnnotation(MouseTrackerAnnotation annotation) → void
Track an annotation so that if the mouse enters it, we send it events. [...]
collectMousePositions() → void
Tells interested objects that a mouse has entered, exited, or moved, given a callback to fetch the MouseTrackerAnnotation associated with a global offset. [...]
@visibleForTesting
detachAnnotation(MouseTrackerAnnotation annotation) → void
Stops tracking an annotation, indicating that it has been removed from the layer tree. [...]
isAnnotationAttached(MouseTrackerAnnotation annotation) bool
Checks if the given MouseTrackerAnnotation is attached to this MouseTracker. [...]
@visibleForTesting
addListener(VoidCallback listener) → void
Register a closure to be called when the object changes. [...]
inherited
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
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed. [...]
inherited
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. [...]
inherited
toString() String
Returns a string representation of this object.
inherited

Operators

operator ==(dynamic other) bool
The equality operator. [...]
inherited