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

DropdownMenuItem({Key? key, VoidCallback? onTap, T? value, bool enabled = true, AlignmentGeometry alignment = AlignmentDirectional.centerStart, required Widget child}): Creates an item for a dropdown menu.
const

alignment → AlignmentGeometry: Defines how the item is positioned within the container.
finalinherited
child → Widget: The widget below this widget in the tree.
finalinherited
enabled → bool: Whether or not a user can select this menu item.
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
onTap → VoidCallback?: Called when the dropdown menu item is tapped.
final
runtimeType → Type: A representation of the runtime type of the object.
read-onlyinherited
value → T?: The value to return if the user selects this menu item.
final

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">@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

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