RawScrollbarState<T extends RawScrollbar> class
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
Properties
- context → BuildContext
-
The location in the tree where this widget builds.
no setterinherited
- enableGestures → bool
-
Overridable getter to indicate is gestures should be enabled on the
scrollbar.
no setter
- 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
- scrollbarPainter ↔ ScrollbarPainter
-
Used to paint the scrollbar.
latefinal
- showScrollbar → bool
-
Overridable getter to indicate that the scrollbar should be visible, even
when a scroll is not underway.
no setter
- widget → T
-
The current configuration.
no setterinherited
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.
inherited
-
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 we haven't seen a ScrollMetrics notification yet.
-
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.
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.
-
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 nonexistent method or property is accessed.
inherited
-
reassemble(
) → void -
Called whenever the application is reassembled during debugging, for
example during hot reload.
inherited
-
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
-
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.
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited