Widget class abstract

Immutable description of part of the user interface.

Implementers

• ProxyWidget
• RenderObjectWidget
• StatefulWidget
• StatelessWidget

Constructors

Widget({Key? key})

Creates a widget with an optional key.

const

Properties

hashCode → int

The hash code for this object.

no setter, inherited

key → Key?

Controls how this widget replaces another of the same type.

final

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited

Static Methods

canUpdate(Widget oldWidget, Widget newWidget) → bool

Whether oldWidget's element can be updated to newWidget.