NavigationRailThemeData class Null safety

Defines default property values for descendant NavigationRail widgets.

Descendant widgets obtain the current NavigationRailThemeData object using NavigationRailTheme.of(context). Instances of NavigationRailThemeData can be customized with NavigationRailThemeData.copyWith.

Typically a NavigationRailThemeData is specified as part of the overall Theme with ThemeData.navigationRailTheme.

All NavigationRailThemeData properties are null by default. When null, the NavigationRail will use the values from ThemeData if they exist, otherwise it will provide its own defaults based on the overall Theme's textTheme and colorScheme. See the individual NavigationRail properties for details.

See also:

  • ThemeData, which describes the overall theme information for the application.
Mixed in types
Annotations

Constructors

Creates a theme that can be used for ThemeData.navigationRailTheme.
const

Properties

backgroundColor → Color?
Color to be used for the NavigationRail's background.
final
elevation → double?
The z-coordinate to be used for the NavigationRail's elevation.
final
groupAlignment → double?
The alignment for the NavigationRailDestinations as they are positioned within the NavigationRail.
final
hashCode → int
The hash code for this object.
read-onlyoverride
indicatorColor → Color?
Overrides the default value of NavigationRail's selection indicator color, when useIndicator is true.
final
labelType → NavigationRailLabelType?
The type that defines the layout and behavior of the labels in the NavigationRail.
final
minExtendedWidth → double?
Overrides the default value of NavigationRail's minimum width when it is extended.
final
minWidth → double?
Overrides the default value of NavigationRail's minimum width when it is not extended.
final
runtimeType → Type
A representation of the runtime type of the object.
read-onlyinherited
selectedIconTheme → IconThemeData?
The theme to merge with the default icon theme for NavigationRailDestination icons, when the destination is selected.
final
selectedLabelTextStyle → TextStyle?
The style to merge with the default text style for NavigationRailDestination labels, when the destination is selected.
final
unselectedIconTheme → IconThemeData?
The theme to merge with the default icon theme for NavigationRailDestination icons, when the destination is not selected.
final
unselectedLabelTextStyle → TextStyle?
The style to merge with the default text style for NavigationRailDestination labels, when the destination is not selected.
final
useIndicator → bool?
Whether or not the selected NavigationRailDestination should include a NavigationIndicator.
final

Methods

copyWith({Color? backgroundColor, double? elevation, TextStyle? unselectedLabelTextStyle, TextStyle? selectedLabelTextStyle, IconThemeData? unselectedIconTheme, IconThemeData? selectedIconTheme, double? groupAlignment, NavigationRailLabelType? labelType, bool? useIndicator, Color? indicatorColor, double? minWidth, double? minExtendedWidth}) → NavigationRailThemeData
Creates a copy of this object with the given fields replaced with the new values.
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
toStringShort() → String
A brief description of this object, usually just the runtimeType and the hashCode.
inherited

Operators

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

Static Methods

lerp(NavigationRailThemeData? a, NavigationRailThemeData? b, double t) → NavigationRailThemeData?
Linearly interpolate between two navigation rail themes.