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.

Inheritance
Mixed in types

Constructors

RawScrollbarState()

Properties

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

Methods

activate() → void
Called when this object is reinserted into the tree after having been removed via deactivate.
inherited
build(BuildContext context) → Widget
Describes the part of the user interface represented by this widget.
override
createTicker(TickerCallback onTick) → Ticker
Creates a ticker with the given callback.
inherited
deactivate() → void
Called when this object is removed from the tree.
mustCallSuper">@mustCallSuperprotected">@protectedinherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node.
inherited
didChangeDependencies() → void
Called when a dependency of this State object changes.
override
didUpdateWidget(covariant T oldWidget) → void
Called whenever the widget configuration changes.
override
dispose() → void
Called when this object is removed from the tree permanently.
override
getScrollbarDirection() → Axis?
Returns the Axis of the child scroll view, or null if the current scroll controller does not have any attached positions.
protected">@protected
handleHover(PointerHoverEvent event) → void
Cancels the fade out animation so the scrollbar will remain visible for interaction.
mustCallSuper">@mustCallSuperprotected">@protected
handleHoverExit(PointerExitEvent event) → void
Initiates the fade out animation.
mustCallSuper">@mustCallSuperprotected">@protected
handleThumbPress() → void
Handler called when a press on the scrollbar thumb has been recognized.
mustCallSuper">@mustCallSuperprotected">@protected
handleThumbPressEnd(Offset localPosition, Velocity velocity) → void
Handler called when a long press has ended.
mustCallSuper">@mustCallSuperprotected">@protected
handleThumbPressStart(Offset localPosition) → void
Handler called when a long press gesture has started.
mustCallSuper">@mustCallSuperprotected">@protected
handleThumbPressUpdate(Offset localPosition) → void
Handler called when a currently active long press gesture moves.
mustCallSuper">@mustCallSuperprotected">@protected
initState() → void
Called when this object is inserted into the tree.
override
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.
protected">@protected
isPointerOverThumb(Offset position, PointerDeviceKind kind) → bool
Returns true if the provided Offset is located over the thumb of the RawScrollbar.
protected">@protected
isPointerOverTrack(Offset position, PointerDeviceKind kind) → bool
Returns true if the provided Offset is located over the track of the RawScrollbar.
protected">@protected
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed.
inherited
reassemble() → void
Called whenever the application is reassembled during debugging, for example during hot reload.
mustCallSuper">@mustCallSuperprotected">@protectedinherited
setState(VoidCallback fn) → void
Notify the framework that the internal state of this object has changed.
protected">@protectedinherited
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
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.
protected">@protected

Operators

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