WatchfulRenderElement class abstract

A render element show casing lifecycle events.

This class serves as an example that shows additional functionality (such as lifecycle events) provided by RenderElements. It can be used as-it-is as well.

Inheritance

Constructors

WatchfulRenderElement(Widget widget, RenderElement parent)

Properties

appTargetId → String
App's target id.
finalinherited
domNode → Element?
Associated DOM node.
no setterinherited
hasDomNode → bool
Whether current element has an associated dom node.
no setterinherited
hashCode → int
The hash code for this object.
no setterinherited
isMounted → bool
Whether current render element is mounted on screen.
no setter
key → Key?
Associated widget's key.
no setterinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
widget → Widget
The configuration for this render element.
no setterinherited
widgetChildren → List<Widget>
Child widgets of current widget(if any).
no setterinherited
widgetRuntimeType → String
Widget's runtime type.
no setterinherited

Methods

addRenderEventListeners(Map<RenderEventType, RenderEventCallback> listeners) → void
Register RenderEvent listeners.
inherited
afterMount() → void
After mount hook.
afterUnMount() → void
After unMount hook.
afterUpdate() → void
After update hook.
afterWidgetRebind({required Widget oldWidget, required Widget newWidget, required UpdateType updateType}) → void
After widget's rebind hook.
inherited
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.
inherited
dispose() → void
Dispose hook.
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.
inherited
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.
inherited
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.
inherited
findClosestDomNode() → Element
Returns dom node that's associated with the current context.
inherited
findClosestDomNodeInAncestors() → Element?
Returns the nearest dom node in ancestors.
inherited
findClosestDomNodeInDescendants() → Element?
Returns the nearest dom node in descendants.
inherited
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.
inherited
init() → void
Init hook.
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
render({required Widget widget}) → DomNodePatch?
Render hook.
inherited
setMetaInformation({required String informationId, required MetaInformation information}) → void
Add or update document meta information.
inherited
toString() → String
A string representation of this object.
inherited
traverseAncestorElements(RenderElementCallback callback) → void
Traverse the ancestor elements.
inherited
traverseChildElements(RenderElementCallback callback) → void
Traverse the child elements of this render element.
inherited
unsetMetaInformation({required String informationId}) → void
Clear meta information associated with meta information id.
inherited
update({required UpdateType updateType, required Widget oldWidget, required Widget newWidget}) → DomNodePatch?
Update hook.
inherited
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.
inherited
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.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited