NavigationBarThemeData class Null safety
Defines default property values for descendant NavigationBar widgets.
Descendant widgets obtain the current NavigationBarThemeData object
using NavigationBarTheme.of(context)
. Instances of
NavigationBarThemeData can be customized with
NavigationBarThemeData.copyWith.
Typically a NavigationBarThemeData is specified as part of the overall Theme with ThemeData.navigationBarTheme. Alternatively, a NavigationBarTheme inherited widget can be used to theme NavigationBars in a subtree of widgets.
All NavigationBarThemeData properties are null
by default.
When null, the NavigationBar will provide its own defaults based on the
overall Theme's textTheme and colorScheme. See the individual
NavigationBar 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.navigationBarTheme and
NavigationBarTheme.
const
Properties
- backgroundColor → Color?
-
Overrides the default value of NavigationBar.backgroundColor.
final
- elevation → double?
-
Overrides the default value of NavigationBar.elevation.
final
- hashCode → int
-
The hash code for this object.
read-onlyoverride
- height → double?
-
Overrides the default value of NavigationBar.height.
final
-
iconTheme
→ MaterialStateProperty<
IconThemeData?> ? -
The theme to merge with the default icon theme for
NavigationDestination icons.
final
- indicatorColor → Color?
-
Overrides the default value of NavigationBar's selection indicator.
final
- indicatorShape → ShapeBorder?
-
Overrides the default shape of the NavigationBar's selection indicator.
final
- labelBehavior → NavigationDestinationLabelBehavior?
-
Overrides the default value of NavigationBar.labelBehavior.
final
-
labelTextStyle
→ MaterialStateProperty<
TextStyle?> ? -
The style to merge with the default text style for
NavigationDestination labels.
final
- runtimeType → Type
-
A representation of the runtime type of the object.
read-onlyinherited
- surfaceTintColor → Color?
-
Overrides the default value of NavigationBar.surfaceTintColor.
final
Methods
-
copyWith(
{double? height, Color? backgroundColor, Color? surfaceTintColor, double? elevation, Color? indicatorColor, ShapeBorder? indicatorShape, MaterialStateProperty< TextStyle?> ? labelTextStyle, MaterialStateProperty<IconThemeData?> ? iconTheme, NavigationDestinationLabelBehavior? labelBehavior}) → NavigationBarThemeData - 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(
NavigationBarThemeData? a, NavigationBarThemeData? b, double t) → NavigationBarThemeData? - Linearly interpolate between two navigation rail themes.