DropdownMenuItem<T> class Null safety

An item in a menu created by a DropdownButton.

The type T is the type of the value the entry represents. All the entries in a given menu must represent values with consistent types.

Inheritance

Constructors

Creates an item for a dropdown menu.
const

Properties

alignment AlignmentGeometry
Defines how the item is positioned within the container.
final, inherited
child Widget
The widget below this widget in the tree.
final, inherited
enabled bool
Whether or not a user can select this menu item.
final
hashCode int
The hash code for this object.
@nonVirtual, read-only, inherited
key Key?
Controls how one widget replaces another widget in the tree.
final, inherited
onTap VoidCallback?
Called when the dropdown menu item is tapped.
final
runtimeType Type
A representation of the runtime type of the object.
read-only, inherited
value → T?
The value to return if the user selects this menu item.
final

Methods

build(BuildContext context) Widget
Describes the part of the user interface represented by this widget.
inherited
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