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, read-only, inherited
height double
The height of this indicator. [...]
final
key Key?
Controls how one widget replaces another widget in the tree. [...]
final, inherited
runtimeType Type
A representation of the runtime type of the object.
read-only, inherited
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, inherited
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, inherited