ScrollNotificationObserverState class

The listener list state for a ScrollNotificationObserver returned by ScrollNotificationObserver.of.

ScrollNotificationObserver is similar to NotificationListener. It supports a listener list instead of just a single listener and its listeners run unconditionally, they do not require a gating boolean return value.

Inheritance

Constructors

ScrollNotificationObserverState()

Properties

context BuildContext
The location in the tree where this widget builds.
no setterinherited
hashCode int
The hash code for this object.
no setterinherited
mounted bool
Whether this State object is currently in a tree.
no setterinherited
runtimeType Type
A representation of the runtime type of the object.
no setterinherited
widget ScrollNotificationObserver
The current configuration.
no setterinherited

Methods

activate() → void
Called when this object is reinserted into the tree after having been removed via deactivate.
inherited
addListener(ScrollNotificationCallback listener) → void
Add a ScrollNotificationCallback that will be called each time a descendant scrolls.
build(BuildContext context) Widget
Describes the part of the user interface represented by this widget.
override
deactivate() → void
Called when this object is removed from the tree.
inherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node.
inherited
didChangeDependencies() → void
Called when a dependency of this State object changes.
inherited
didUpdateWidget(covariant ScrollNotificationObserver oldWidget) → void
Called whenever the widget configuration changes.
inherited
dispose() → void
Called when this object is removed from the tree permanently.
override
initState() → void
Called when this object is inserted into the tree.
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
reassemble() → void
Called whenever the application is reassembled during debugging, for example during hot reload.
inherited
removeListener(ScrollNotificationCallback listener) → void
Remove the specified ScrollNotificationCallback.
setState(VoidCallback fn) → void
Notify the framework that the internal state of this object has changed.
inherited
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