ButtonBarTheme class Null safety

Applies a button bar theme to descendant ButtonBar widgets.

A button bar theme describes the layout and properties for the buttons contained in a ButtonBar.

Descendant widgets obtain the current theme's ButtonBarTheme object using ButtonBarTheme.of. When a widget uses ButtonBarTheme.of, it is automatically rebuilt if the theme later changes.

A button bar theme can be specified as part of the overall Material theme using ThemeData.buttonBarTheme.

Constructors

ButtonBarTheme({Key? key, required ButtonBarThemeData data, required Widget child}): Constructs a button bar theme that configures all descendent ButtonBar widgets.
const

child → Widget: The widget below this widget in the tree.
finalinherited
data → ButtonBarThemeData: The properties used for all descendant ButtonBar widgets.
final
hashCode → int: The hash code for this object.
nonVirtual">@nonVirtualread-onlyinherited
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

createElement() → InheritedElement: Inflates this configuration to a concrete instance.
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
updateShouldNotify(covariant ButtonBarTheme oldWidget) → bool: Whether the framework should notify widgets that inherit from this widget.
override

operator ==(Object other) → bool: The equality operator.
nonVirtual">@nonVirtualinherited

of(BuildContext context) → ButtonBarThemeData: Returns the configuration data from the closest ButtonBarTheme ancestor. If there is no ancestor, it returns ThemeData.buttonBarTheme. Applications can assume that the returned value will not be null.