Widget class abstract

Describes the configuration for an RenderElement.

Widgets are the central class hierarchy in the Rad framework. A widget is an immutable description of part of a user interface. Widgets can be inflated into render elements.

Implementers

• EventDetector
• GestureDetector
• HTMLWidgetBase
• InheritedWidget
• ListView
• Navigator
• RadApp
• RawMarkUp
• Route
• StatefulWidget
• StatelessWidget

Annotations

• @immutable

Constructors

Widget({Key? key})

const

Properties

correspondingTag → DomTagType?

Corresponding HTML tag to use to render this widget

no setter

hashCode → int

The hash code for this object.

no setter, inherited

key → Key?

Keys help Rad identify which widgets have changed, are added, or are removed when a widget has multiple sibling widgets.

final

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

widgetCaptureEventListeners → Map<DomEventType, EventCallback?>

Events that this widget is listening to in capturing phase.

no setter

widgetEventListeners → Map<DomEventType, EventCallback?>

Events that this widget is listening to in bubbling phase.

no setter

Methods

createRenderElement(RenderElement parent) → RenderElement

Create element for current widget.

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

shouldUpdateWidget(Widget oldWidget) → bool

Whether to update current widget.

shouldUpdateWidgetChildren(Widget oldWidget, bool shouldUpdateWidget) → bool

Whether to update current widget's children.

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited