SingleChildWidgetElementMixin mixin
- Superclass constraints
- Available extensions
Methods
-
activate()
→ void
-
Transition from the "inactive" to the "active" lifecycle state.
override
-
attachNotificationTree()
→ void
-
Called in Element.mount and Element.activate to register this element in
the notification tree.
inherited
-
attachRenderObject(Object? newSlot)
→ void
-
Add renderObject to the render tree at the location specified by
newSlot.
inherited
-
deactivate()
→ void
-
Transition from the "active" to the "inactive" lifecycle state.
inherited
-
deactivateChild(Element child)
→ void
-
Move the given element to the list of inactive elements and detach its
render object from the render tree.
inherited
-
debugDeactivated()
→ void
-
Called, in debug mode, after children have been deactivated (see deactivate).
inherited
-
debugDescribeChildren()
→ List<DiagnosticsNode>
-
Returns a list of DiagnosticsNode objects describing this node's
children.
inherited
-
debugExpectsRenderObjectForSlot(Object? slot)
→ bool
-
Whether the child in the provided
slot (or one of its descendants) must
insert a RenderObject into its ancestor RenderObjectElement by calling
RenderObjectElement.insertRenderObjectChild on it.
inherited
-
debugFillProperties(DiagnosticPropertiesBuilder properties)
→ void
-
Add additional properties associated with the node.
inherited
-
debugGetCreatorChain(int limit)
→ String
-
Returns a description of what caused this element to be created.
inherited
-
debugGetDiagnosticChain()
→ List<Element>
-
Returns the parent chain from this element back to the root of the tree.
inherited
-
debugVisitOnstageChildren(ElementVisitor visitor)
→ void
-
Calls the argument for each child considered onstage.
inherited
-
dependOnInheritedElement(InheritedElement ancestor, {Object? aspect})
→ InheritedWidget
-
Registers this build context with
ancestor such that when
ancestor's widget changes this build context is rebuilt.
inherited
-
dependOnInheritedWidgetOfExactType<T extends InheritedWidget>({Object? aspect})
→ T?
-
Returns the nearest widget of the given type
T and creates a dependency
on it, or null if no appropriate widget is found.
inherited
-
describeElement(String name, {DiagnosticsTreeStyle style = DiagnosticsTreeStyle.errorProperty})
→ DiagnosticsNode
-
Returns a description of the Element associated with the current build context.
inherited
-
describeMissingAncestor({required Type expectedAncestorType})
→ List<DiagnosticsNode>
-
Adds a description of a specific type of widget missing from the current
build context's ancestry tree.
inherited
-
describeOwnershipChain(String name)
→ DiagnosticsNode
-
Adds a description of the ownership chain from a specific Element
to the error report.
inherited
-
describeWidget(String name, {DiagnosticsTreeStyle style = DiagnosticsTreeStyle.errorProperty})
→ DiagnosticsNode
-
Returns a description of the Widget associated with the current build context.
inherited
-
detachRenderObject()
→ void
-
Remove renderObject from the render tree.
inherited
-
didChangeDependencies()
→ void
-
Called when a dependency of this element changes.
inherited
-
dispatchNotification(Notification notification)
→ void
-
Start bubbling this notification at the given build context.
inherited
-
doesDependOnInheritedElement(InheritedElement ancestor)
→ bool
-
Returns
true if dependOnInheritedElement was previously called with ancestor.
inherited
-
findAncestorRenderObjectOfType<T extends RenderObject>()
→ T?
-
Returns the RenderObject object of the nearest ancestor RenderObjectWidget widget
that is an instance of the given type
T.
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
-
findRenderObject()
→ RenderObject?
-
The current RenderObject for the widget. If the widget is a
RenderObjectWidget, this is the render object that the widget created
for itself. Otherwise, it is the render object of the first descendant
RenderObjectWidget.
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
-
forgetChild(Element child)
→ void
-
Remove the given child from the element's child list, in preparation for
the child being reused elsewhere in the element tree.
inherited
-
getElementForInheritedWidgetOfExactType<T extends InheritedWidget>()
→ InheritedElement?
-
Obtains the element corresponding to the nearest widget of the given type
T,
which must be the type of a concrete InheritedWidget subclass.
inherited
-
getInheritedWidgetOfExactType<T extends InheritedWidget>()
→ T?
-
Returns the nearest widget of the given InheritedWidget subclass
T or
null if an appropriate ancestor is not found.
inherited
-
inflateWidget(Widget newWidget, Object? newSlot)
→ Element
-
Create an element for the given widget and add it as a child of this
element in the given slot.
inherited
-
markNeedsBuild()
→ void
-
Marks the element as dirty and adds it to the global list of widgets to
rebuild in the next frame.
inherited
-
mount(Element? parent, dynamic newSlot)
→ void
-
Add this element to the tree in the given slot of the given parent.
override
-
noSuchMethod(Invocation invocation)
→ dynamic
-
Invoked when a nonexistent method or property is accessed.
inherited
-
performRebuild()
→ void
-
Cause the widget to update itself.
inherited
-
reassemble()
→ void
-
Called whenever the application is reassembled during debugging, for
example during hot reload.
inherited
-
rebuild({bool force = false})
→ void
-
Cause the widget to update itself. In debug builds, also verify various
invariants.
inherited
-
toDiagnosticsNode({String? name, DiagnosticsTreeStyle? style})
→ DiagnosticsNode
-
Returns a debug representation of the object that is used by debugging
tools and by DiagnosticsNode.toStringDeep.
inherited
-
toString({DiagnosticLevel minLevel = DiagnosticLevel.info})
→ String
-
A string representation of this object.
inherited
-
toStringDeep({String prefixLineOne = '', String? prefixOtherLines, DiagnosticLevel minLevel = DiagnosticLevel.debug})
→ String
-
Returns a string representation of this node and its descendants.
inherited
-
toStringShallow({String joiner = ', ', DiagnosticLevel minLevel = DiagnosticLevel.debug})
→ String
-
Returns a one-line detailed description of the object.
inherited
-
toStringShort()
→ String
-
A short, textual description of this element.
inherited
-
unmount()
→ void
-
Transition from the "inactive" to the "defunct" lifecycle state.
inherited
-
update(covariant Widget newWidget)
→ void
-
Change the widget used to configure this element.
inherited
-
updateChild(Element? child, Widget? newWidget, Object? newSlot)
→ Element?
-
Update the given child with the given new configuration.
inherited
-
updateChildren(List<Element> oldChildren, List<Widget> newWidgets, {Set<Element>? forgottenChildren, List<Object?>? slots})
→ List<Element>
-
Updates the children of this element to use new widgets.
inherited
-
updateSlot(Object? newSlot)
→ void
-
Called by updateSlotForChild when the framework needs to change the slot
that this Element occupies in its ancestor.
inherited
-
updateSlotForChild(Element child, Object? newSlot)
→ void
-
Change the slot that the given child occupies in its parent.
inherited
-
visitAncestorElements(ConditionalElementVisitor visitor)
→ void
-
Walks the ancestor chain, starting with the parent of this build context's
widget, invoking the argument for each ancestor.
inherited
-
visitChildElements(ElementVisitor visitor)
→ void
-
Wrapper around visitChildren for BuildContext.
inherited
-
visitChildren(ElementVisitor visitor)
→ void
-
Calls the argument for each child. Must be overridden by subclasses that
support having children.
inherited
