Widget class abstract

The base class for all widgets, analogous to Flutter's Widget.

Widgets are immutable descriptions of part of a user interface. Each widget describes its own createElement method which creates an Element that manages the widget's position in the tree.

Implementers

• InheritedWidget
• ParentDataWidget
• RenderObjectWidget
• StatefulWidget
• StatelessWidget

Constructors

Widget({Key? key})

Creates a Widget.

const

Properties

hashCode → int

The hash code for this object.

no setter, inherited

key → Key?

Controls how one widget replaces another in the tree.

final

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

createElement() → Element

Creates the Element for this widget.

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 newWidget can be used to update an element that currently has oldWidget as its configuration.