MultiChildRenderObjectElement class

Element for RenderObjectWidgets with multiple children.

Adopts each child's render object onto the parent render object via the standard RenderObject.adoptChild / RenderObject.dropChild pair. Subclasses can override adoptChildRenderObject / dropChildRenderObject to plug into more specialised parents (e.g. RenderFlex needs flex metadata; see FlexRenderObjectElement).

Inheritance
Implementers

Properties

buildContext → BuildContext
The BuildContext for this element.
no setterinherited
children → List<Element>
The child elements of this element.
finalinherited
hashCode → int
The hash code for this object.
no setterinherited
mounted ↔ bool
Whether this element is currently in the tree.
getter/setter pairinherited
owner ↔ BuildOwner
The owner that manages this element's build pipeline.
latefinalinherited
parent ↔ Element?
The parent element, or null for the root.
getter/setter pairinherited
renderObject → RenderObject?
Get the RenderObject managed by this element
no setterinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
widget ↔ MultiChildRenderObjectWidget
The widget this element currently represents.
getter/setter pairinherited-setteroverride-getter

Methods

adoptChildRenderObject(RenderBox child, Element childElement, int slot) → void
Adopt child onto this element's render object at slot (document order). Subclasses override to attach extra metadata such as flex factors.
attachRenderObject() → void
Attach the RenderObject to its parent in the render tree
inherited
debugDescribeWidget() → String
Short debug description of this element's widget and key.
inherited
dependOnInheritedElementOfExactType<T extends InheritedWidget>({Object? aspect}) → InheritedElement?
Registers this element as dependent on the nearest inherited widget of type T.
inherited
detachRenderObject() → void
Detach the RenderObject from its parent in the render tree
inherited
didLoseDependency(InheritedElement inherited) → void
Called when inherited removes this element from its dependents.
inherited
dropChildRenderObject(RenderObject child, Element? childElement) → void
Drop child from this element's render object. childElement is null when the drop happens as part of a re-sync pass rather than an element removal.
findAncestorRenderObjectOfExactType<T extends RenderObject>() → T?
Returns the nearest ancestor render object of type T.
inherited
findAncestorStateOfType<T extends State<StatefulWidget>>() → T?
Returns the nearest ancestor state of type T.
inherited
findAncestorWidgetOfExactType<T extends Widget>() → T?
Returns the nearest ancestor widget of type T.
inherited
findRenderObject() → RenderObject?
Find the RenderObject managed by this element
inherited
getElementForInheritedWidgetOfExactType<T extends InheritedWidget>() → InheritedElement?
Returns the nearest inherited element of type T without registering a dependency.
inherited
insertRenderObjectChild(RenderObject child, Element childElement) → void
Hook for parents to place newly attached render object children.
override
mount(Element? parent, BuildOwner owner) → void
Inserts this element into the tree under parent and builds it.
override
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
notifyDependent(InheritedElement inherited, Object? aspect) → void
Called by inherited when it changes; schedules this element to rebuild.
inherited
performRebuild() → void
Rebuilds this element's subtree from its current widget configuration.
inherited
rebuild() → void
Rebuilds this element, refreshing its inherited-widget dependencies.
inherited
removeRenderObjectChild(RenderObject child, Element childElement) → void
Hook for parents to remove render object children on detach.
override
toString() → String
A string representation of this object.
inherited
unmount() → void
Removes this element and its descendants from the tree permanently.
override
update(Widget newWidget) → void
Updates this element to represent newWidget and rebuilds it.
override
visitAncestorElements(bool visitor(Element element)) → void
Walk up the element tree calling visitor for each ancestor until it returns false or the root is reached.
inherited
visitChildren(ElementVisitor visitor) → void
Calls visitor for each child element of this element.
override

Operators

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