StretchingOverscrollIndicator class Null safety

A Material Design visual indication that a scroll view has overscrolled.

A StretchingOverscrollIndicator listens for ScrollNotifications in order to stretch the content of the Scrollable. These notifications are typically generated by a ScrollView, such as a ListView or a GridView.

When triggered, the StretchingOverscrollIndicator generates an OverscrollIndicatorNotification before showing an overscroll indication. To prevent the indicator from showing the indication, call OverscrollIndicatorNotification.disallowIndicator on the notification.

Created by ScrollBehavior.buildOverscrollIndicator on platforms (e.g., Android) that commonly use this type of overscroll indication when ScrollBehavior.androidOverscrollIndicator is AndroidOverscrollIndicator.stretch. Otherwise, the default GlowingOverscrollIndicator is applied.

See also:

Inheritance

Constructors

StretchingOverscrollIndicator({Key? key, required AxisDirection axisDirection, ScrollNotificationPredicate notificationPredicate = defaultScrollNotificationPredicate, Widget? child})
Creates a visual indication that a scroll view has overscrolled by applying a stretch transformation to the content. [...]
const

Properties

axis Axis
The axis along which scrolling occurs in the Scrollable whose overscrolls are to be visualized.
read-only
axisDirection AxisDirection
The direction of positive scroll offsets in the Scrollable whose overscrolls are to be visualized.
final
child Widget?
The widget below this widget in the tree. [...]
final
hashCode int
The hash code for this object. [...]
@nonVirtual, read-only, inherited
key Key?
Controls how one widget replaces another widget in the tree. [...]
final, inherited
notificationPredicate ScrollNotificationPredicate
A check that specifies whether a ScrollNotification should be handled by this widget. [...]
final
runtimeType Type
A representation of the runtime type of the object.
read-only, inherited

Methods

createElement() StatefulElement
Creates a StatefulElement to manage this widget's location in the tree. [...]
inherited
createState() State<StretchingOverscrollIndicator>
Creates the mutable state for this widget at a given location in the tree. [...]
override
debugDescribeChildren() List<DiagnosticsNode>
Returns a list of DiagnosticsNode objects describing this node's children. [...]
@protected, inherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node. [...]
override
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed. [...]
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
toStringDeep({String prefixLineOne = '', String? prefixOtherLines, DiagnosticLevel minLevel = DiagnosticLevel.debug}) String
Returns a string representation of this node and its descendants. [...]
inherited
toStringShallow({String joiner = ', ', DiagnosticLevel minLevel = DiagnosticLevel.debug}) String
Returns a one-line detailed description of the object. [...]
inherited
toStringShort() String
A short, textual description of this widget.
inherited

Operators

operator ==(Object other) bool
The equality operator. [...]
@nonVirtual, inherited