RenderElement class abstract

An instantiation of a Widget at a particular location in the tree.

Implemented types

• BuildContext

Implementers

• RootRenderElement
• WatchfulRenderElement

Constructors

RenderElement(Widget widget, RenderElement parent)

Properties

appTargetId → String

App's target id.

final

domNode → Element?

Associated DOM node.

no setter

hasDomNode → bool

Whether current element has an associated dom node.

no setter

hashCode → int

The hash code for this object.

no setter, inherited

key → Key?

Associated widget's key.

no setter, override

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

widget → Widget

The configuration for this render element.

no setter, override

widgetChildren → List<Widget>

Child widgets of current widget(if any).

no setter

widgetRuntimeType → String

Widget's runtime type.

no setter, override

Methods

addRenderEventListeners(Map<RenderEventType, RenderEventCallback> listeners) → void

Register RenderEvent listeners.

afterWidgetRebind({required Widget oldWidget, required Widget newWidget, required UpdateType updateType}) → void

After widget's rebind hook.

dependOnInheritedWidgetOfExactType<T extends InheritedWidget>() → T?

Obtains the nearest widget of the given type T, which must be the type of a concrete InheritedWidget subclass, and registers this build context with that widget such that when that widget changes (or a new widget of that type is introduced, or the widget goes away), this build context is rebuilt so that it can obtain new values from that widget.

override

findAncestorRenderElementOfExactType<T extends RenderElement>() → T?

Returns the nearest ancestor render element of the given type T, which must be the type of a concrete RenderElement subclass.

override

findAncestorStateOfType<T extends State<StatefulWidget>>() → T?

Returns the State object of the nearest ancestor StatefulWidget widget that is an instance of the given type T.

override

findAncestorWidgetOfExactType<T extends Widget>() → T?

Returns the nearest ancestor widget of the given type T, which must be the type of a concrete Widget subclass.

override

findClosestDomNode() → Element

Returns dom node that's associated with the current context.

override

findClosestDomNodeInAncestors() → Element?

Returns the nearest dom node in ancestors.

override

findClosestDomNodeInDescendants() → Element?

Returns the nearest dom node in descendants.

override

findRootAncestorStateOfType<T extends State<StatefulWidget>>() → T?

Returns the State object of the furthest ancestor StatefulWidget widget that is an instance of the given type T.

override

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

register() → void

Register hook.

render({required Widget widget}) → DomNodePatch?

Render hook.

setMetaInformation({required String informationId, required MetaInformation information}) → void

Add or update document meta information.

override

toString() → String

A string representation of this object.

override

traverseAncestorElements(RenderElementCallback callback) → void

Traverse the ancestor elements.

override

traverseChildElements(RenderElementCallback callback) → void

Traverse the child elements of this render element.

override

unsetMetaInformation({required String informationId}) → void

Clear meta information associated with meta information id.

override

update({required UpdateType updateType, required Widget oldWidget, required Widget newWidget}) → DomNodePatch?

Update hook.

visitAncestorElements(RenderElementVisitor visitor) → void

Walks the ancestor chain, starting with the parent of this build context's widget, invoking the argument for each ancestor. The callback is given a reference to the ancestor widget's corresponding Element object. The walk stops when it reaches the root widget or when the callback returns false.

override

visitChildElements(RenderElementVisitor visitor) → void

Walks the children of this render element. The callback is given a reference to the child widget's corresponding Element object. The walk stops when it reaches the end of child or when the callback returns false.

override

Operators

operator ==(Object other) → bool

The equality operator.

inherited