RawScrollbarState<T extends RawScrollbar> class Null safety

The state for a RawScrollbar widget, also shared by the Scrollbar and CupertinoScrollbar widgets.

Controls the animation that fades a scrollbar's thumb in and out of view.

Provides defaults gestures for dragging the scrollbar thumb and tapping on the scrollbar track.

Mixed in types




context BuildContext
The location in the tree where this widget builds.
read-only, inherited
enableGestures bool
Overridable getter to indicate is gestures should be enabled on the scrollbar.
@protected, read-only
hashCode int
The hash code for this object.
read-only, inherited
mounted bool
Whether this State object is currently in a tree.
read-only, inherited
runtimeType Type
A representation of the runtime type of the object.
read-only, inherited
scrollbarPainter ScrollbarPainter
Used to paint the scrollbar.
@protected, late, final
showScrollbar bool
Overridable getter to indicate that the scrollbar should be visible, even when a scroll is not underway.
@protected, read-only
widget → T
The current configuration.
read-only, inherited


activate() → void
Called when this object is reinserted into the tree after having been removed via deactivate.
build(BuildContext context) Widget
Describes the part of the user interface represented by this widget.
createTicker(TickerCallback onTick) Ticker
Creates a ticker with the given callback.
deactivate() → void
Called when this object is removed from the tree.
@mustCallSuper, @protected, inherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node.
didChangeDependencies() → void
Called when a dependency of this State object changes.
didUpdateWidget(covariant T oldWidget) → void
Called whenever the widget configuration changes.
dispose() → void
Called when this object is removed from the tree permanently.
getScrollbarDirection() Axis?
Returns the Axis of the child scroll view, or null if the current scroll controller does not have any attached positions.
handleHover(PointerHoverEvent event) → void
Cancels the fade out animation so the scrollbar will remain visible for interaction.
handleHoverExit(PointerExitEvent event) → void
Initiates the fade out animation.
handleThumbPress() → void
Handler called when a press on the scrollbar thumb has been recognized.
handleThumbPressEnd(Offset localPosition, Velocity velocity) → void
Handler called when a long press has ended.
handleThumbPressStart(Offset localPosition) → void
Handler called when a long press gesture has started.
handleThumbPressUpdate(Offset localPosition) → void
Handler called when a currently active long press gesture moves.
initState() → void
Called when this object is inserted into the tree.
isPointerOverScrollbar(Offset position, PointerDeviceKind kind, {bool forHover = false}) bool
Returns true if the provided Offset is located over the track or thumb of the RawScrollbar.
isPointerOverThumb(Offset position, PointerDeviceKind kind) bool
Returns true if the provided Offset is located over the thumb of the RawScrollbar.
isPointerOverTrack(Offset position, PointerDeviceKind kind) bool
Returns true if the provided Offset is located over the track of the RawScrollbar.
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed.
reassemble() → void
Called whenever the application is reassembled during debugging, for example during hot reload.
@mustCallSuper, @protected, inherited
setState(VoidCallback fn) → void
Notify the framework that the internal state of this object has changed.
@protected, inherited
toDiagnosticsNode({String? name, DiagnosticsTreeStyle? style}) DiagnosticsNode
Returns a debug representation of the object that is used by debugging tools and by DiagnosticsNode.toStringDeep.
toString({DiagnosticLevel minLevel = DiagnosticLevel.info}) String
A string representation of this object.
toStringShort() String
A brief description of this object, usually just the runtimeType and the hashCode.
updateScrollbarPainter() → void
This method is responsible for configuring the scrollbarPainter according to the widget's properties and any inherited widgets the painter depends on, like Directionality and MediaQuery.


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