NavigationIndicator class Null safety

Selection Indicator for the Material 3 NavigationBar and NavigationRail components.

When animation is 0, the indicator is not present. As animation grows from 0 to 1, the indicator scales in on the x axis.

Used in a Stack widget behind the icons in the Material 3 Navigation Bar to illuminate the selected destination.

Inheritance

Constructors

Builds an indicator, usually used in a stack behind the icon of a navigation bar destination.
const

Properties

animation → Animation<double>
Determines the scale of the indicator.
final
borderRadius → BorderRadius
The border radius of the shape of the indicator.
final
color → Color?
The fill color of this indicator.
final
hashCode → int
The hash code for this object.
nonVirtual">@nonVirtualread-onlyinherited
height → double
The height of this indicator.
final
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
runtimeType → Type
A representation of the runtime type of the object.
read-onlyinherited
shape → ShapeBorder?
The shape of the indicator.
final
width → double
The width of this indicator.
final

Methods

build(BuildContext context) → Widget
Describes the part of the user interface represented by this widget.
override
createElement() → StatelessElement
Creates a StatelessElement to manage this widget's location in the tree.
inherited
debugDescribeChildren() → List<DiagnosticsNode>
Returns a list of DiagnosticsNode objects describing this node's children.
protected">@protectedinherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node.
inherited
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">@nonVirtualinherited