ComponentElement class abstract

An Element that composes other widgets but does not create a render object.

Analogous to Flutter's ComponentElement. Subclasses must implement build.

Inheritance

• Object
• Element
• ComponentElement

Implemented types

• BuildContext

Implementers

• InheritedElement
• ParentDataElement
• StatefulElement
• StatelessElement

Available extensions

• BuildContextNavigation

Constructors

ComponentElement(Widget widget)

Creates a ComponentElement for the given widget.

Properties

dirty ↔ bool

Whether this element has been marked as needing to be rebuilt.

getter/setter pair, inherited

focusManager → FocusManager

Available on BuildContext, provided by the BuildContextNavigation extension

Returns the singleton FocusManager instance.

no setter

hashCode → int

The hash code for this object.

no setter, inherited

navigator → NavigatorState

Available on BuildContext, provided by the BuildContextNavigation extension

Returns the NavigatorState of the nearest Navigator ancestor.

no setter

parent → Element?

The parent of this element in the tree, or null if this is the root.

no setter, inherited

renderObject → RenderObject?

The RenderObject associated with this element, if any.

no setter, override

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

widget ↔ Widget

The current configuration of this element.

getter/setter pair, inherited

Methods

build() → Widget

Builds the widget tree below this element.

dependOnInheritedWidgetOfExactType<T extends InheritedWidget>() → T?

Obtains the nearest InheritedWidget of type T and registers this element as a dependent so it rebuilds when the inherited widget changes.

inherited

findAncestorElementOfExactType<T extends InheritedWidget>() → InheritedElement?

Returns the nearest InheritedElement of type T.

inherited

findAncestorWidgetOfExactType<T extends Widget>() → T?

Returns the nearest ancestor widget of the given type T.

inherited

markNeedsBuild() → void

Marks this element as needing to be rebuilt in the next frame.

inherited

mount(Element? parent) → void

Adds this element to the tree at the given parent.

override

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

rebuild() → void

Rebuilds the element by calling build and updating the child.

toString() → String

A string representation of this object.

inherited

unmount() → void

Removes this element from the tree and releases resources.

inherited

update(Widget newWidget) → void

Updates the widget configuration to newWidget.

override

updateChild(Element? child, Widget newWidget) → Element?

Updates the given child to use the given newWidget, returning the updated or newly created child element.

inherited

visitChildren(void visitor(Element e)) → void

Calls visitor for each direct child of this element.

override

Operators

operator ==(Object other) → bool

The equality operator.

inherited