BottomNavigationBarThemeData class Null safety

Defines default property values for descendant BottomNavigationBar widgets.

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

Typically a BottomNavigationBarThemeData is specified as part of the overall Theme with ThemeData.bottomNavigationBarTheme.

All BottomNavigationBarThemeData properties are null by default. When null, the BottomNavigationBar's build method provides defaults.

See also:

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

Constructors

BottomNavigationBarThemeData({Color? backgroundColor, double? elevation, IconThemeData? selectedIconTheme, IconThemeData? unselectedIconTheme, Color? selectedItemColor, Color? unselectedItemColor, TextStyle? selectedLabelStyle, TextStyle? unselectedLabelStyle, bool? showSelectedLabels, bool? showUnselectedLabels, BottomNavigationBarType? type, bool? enableFeedback, BottomNavigationBarLandscapeLayout? landscapeLayout, MaterialStateProperty<MouseCursor?>? mouseCursor})
Creates a theme that can be used for ThemeData.bottomNavigationBarTheme.
const

Properties

backgroundColor → Color?
The color of the BottomNavigationBar itself.
final
elevation → double?
The z-coordinate of the BottomNavigationBar.
final
enableFeedback → bool?
If specified, defines the feedback property for BottomNavigationBar.
final
hashCode → int
The hash code for this object.
read-onlyoverride
landscapeLayout → BottomNavigationBarLandscapeLayout?
If non-null, overrides the BottomNavigationBar.landscapeLayout property.
final
mouseCursor → MaterialStateProperty<MouseCursor?>?
If specified, overrides the default value of BottomNavigationBar.mouseCursor.
final
runtimeType → Type
A representation of the runtime type of the object.
read-onlyinherited
selectedIconTheme → IconThemeData?
The size, opacity, and color of the icon in the currently selected BottomNavigationBarItem.icon.
final
selectedItemColor → Color?
The color of the selected BottomNavigationBarItem.icon and BottomNavigationBarItem.label.
final
selectedLabelStyle → TextStyle?
The TextStyle of the BottomNavigationBarItem labels when they are selected.
final
showSelectedLabels → bool?
Whether the labels are shown for the selected BottomNavigationBarItem.
final
showUnselectedLabels → bool?
Whether the labels are shown for the unselected BottomNavigationBarItems.
final
type → BottomNavigationBarType?
Defines the layout and behavior of a BottomNavigationBar.
final
unselectedIconTheme → IconThemeData?
The size, opacity, and color of the icon in the currently unselected BottomNavigationBarItem.icons.
final
unselectedItemColor → Color?
The color of the unselected BottomNavigationBarItem.icon and BottomNavigationBarItem.labels.
final
unselectedLabelStyle → TextStyle?
The TextStyle of the BottomNavigationBarItem labels when they are not selected.
final

Methods

copyWith({Color? backgroundColor, double? elevation, IconThemeData? selectedIconTheme, IconThemeData? unselectedIconTheme, Color? selectedItemColor, Color? unselectedItemColor, TextStyle? selectedLabelStyle, TextStyle? unselectedLabelStyle, bool? showSelectedLabels, bool? showUnselectedLabels, BottomNavigationBarType? type, bool? enableFeedback, BottomNavigationBarLandscapeLayout? landscapeLayout, MaterialStateProperty<MouseCursor?>? mouseCursor}) → BottomNavigationBarThemeData
Creates a copy of this object but 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(BottomNavigationBarThemeData? a, BottomNavigationBarThemeData? b, double t) → BottomNavigationBarThemeData
Linearly interpolate between two BottomNavigationBarThemeData.