ScrollBehavior class Null safety

Describes how Scrollable widgets should behave.

Used by ScrollConfiguration to configure the Scrollable widgets in a subtree.

This class can be extended to further customize a ScrollBehavior for a subtree. For example, overriding ScrollBehavior.getScrollPhysics sets the default ScrollPhysics for Scrollables that inherit this ScrollConfiguration. Overriding ScrollBehavior.buildOverscrollIndicator can be used to add or change the default GlowingOverscrollIndicator decoration, while ScrollBehavior.buildScrollbar can be changed to modify the default Scrollbar.

When looking to easily toggle the default decorations, you can use ScrollBehavior.copyWith instead of creating your own ScrollBehavior class. The scrollbar and overscrollIndicator flags can turn these decorations off.

See also:



ScrollBehavior({@Deprecated('Use ThemeData.useMaterial3 or override ScrollBehavior.buildOverscrollIndicator. ' 'This feature was deprecated after v2.13.0-0.0.pre.') AndroidOverscrollIndicator? androidOverscrollIndicator})
Creates a description of how Scrollable widgets should behave.


androidOverscrollIndicator AndroidOverscrollIndicator
Specifies which overscroll indicator to use on
dragDevices Set<PointerDeviceKind>
The device kinds that the scrollable will accept drag gestures from.
hashCode int
The hash code for this object.
runtimeType Type
A representation of the runtime type of the object.


buildOverscrollIndicator(BuildContext context, Widget child, ScrollableDetails details) Widget
Applies a GlowingOverscrollIndicator to the child widget on and TargetPlatform.fuchsia.
buildScrollbar(BuildContext context, Widget child, ScrollableDetails details) Widget
Applies a RawScrollbar to the child widget on desktop platforms.
copyWith({bool? scrollbars, bool? overscroll, Set<PointerDeviceKind>? dragDevices, ScrollPhysics? physics, TargetPlatform? platform, AndroidOverscrollIndicator? androidOverscrollIndicator}) ScrollBehavior
Creates a copy of this ScrollBehavior, making it possible to easily toggle scrollbar and overscrollIndicator effects.
getPlatform(BuildContext context) TargetPlatform
The platform whose scroll physics should be implemented.
getScrollPhysics(BuildContext context) ScrollPhysics
The scroll physics to use for the platform given by getPlatform.
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed.
shouldNotify(covariant ScrollBehavior oldDelegate) bool
Called whenever a ScrollConfiguration is rebuilt with a new ScrollBehavior of the same runtimeType.
toString() String
A string representation of this object.
velocityTrackerBuilder(BuildContext context) GestureVelocityTrackerBuilder
Specifies the type of velocity tracker to use in the descendant Scrollables' drag gesture recognizers, for estimating the velocity of a drag gesture.


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