SubscriptableService class
- Inheritance
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- Mixed-in types
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- Implementers
- Available extensions
Methods
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activate()
→ void
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Transition from the "inactive" to the "active" lifecycle state.
inherited
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addChangeNotifier(ChangeNotifier changeNotifier, {required VoidCallback onChange})
→ VoidCallback
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inherited
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addFuture<T>(Future<T> future, {DataCallback<T>? onData, ErrorCallback? onError})
→ VoidCallback
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inherited
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addStream<T>(Stream<T> stream, {DataCallback<T>? onData, DoneCallback? onDone, ErrorCallback? onError, bool cancelOnError = false})
→ VoidCallback
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inherited
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addSubscription(SubscriptionCallback builder)
→ VoidCallback
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inherited
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attachNotificationTree()
→ void
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Called in Element.mount and Element.activate to register this element in
the notification tree.
inherited
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attachRenderObject(Object? newSlot)
→ void
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Add renderObject to the render tree at the location specified by
newSlot.
inherited
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build()
→ Widget
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Subclasses should override this function to actually call the appropriate
build function (e.g., StatelessWidget.build or State.build) for
their widget.
inherited
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deactivate()
→ void
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Transition from the "active" to the "inactive" lifecycle state.
inherited
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deactivateChild(Element child)
→ void
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Move the given element to the list of inactive elements and detach its
render object from the render tree.
inherited
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debugDeactivated()
→ void
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Called, in debug mode, after children have been deactivated (see deactivate).
inherited
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debugDescribeChildren()
→ List<DiagnosticsNode>
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Returns a list of DiagnosticsNode objects describing this node's
children.
inherited
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debugExpectsRenderObjectForSlot(Object? slot)
→ bool
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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
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debugFillProperties(DiagnosticPropertiesBuilder properties)
→ void
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Add additional properties associated with the node.
inherited
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debugGetCreatorChain(int limit)
→ String
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Returns a description of what caused this element to be created.
inherited
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debugGetDiagnosticChain()
→ List<Element>
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Returns the parent chain from this element back to the root of the tree.
inherited
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debugVisitOnstageChildren(ElementVisitor visitor)
→ void
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Calls the argument for each child considered onstage.
inherited
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dependOnInheritedElement(InheritedElement ancestor, {Object? aspect})
→ InheritedWidget
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Registers this build context with
ancestor such that when
ancestor's widget changes this build context is rebuilt.
inherited
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dependOnInheritedWidgetOfExactType<T extends InheritedWidget>({Object? aspect})
→ T?
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Returns the nearest widget of the given type
T and creates a dependency
on it, or null if no appropriate widget is found.
inherited
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describeElement(String name, {DiagnosticsTreeStyle style = DiagnosticsTreeStyle.errorProperty})
→ DiagnosticsNode
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Returns a description of the Element associated with the current build context.
inherited
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describeMissingAncestor({required Type expectedAncestorType})
→ List<DiagnosticsNode>
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Adds a description of a specific type of widget missing from the current
build context's ancestry tree.
inherited
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describeOwnershipChain(String name)
→ DiagnosticsNode
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Adds a description of the ownership chain from a specific Element
to the error report.
inherited
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describeWidget(String name, {DiagnosticsTreeStyle style = DiagnosticsTreeStyle.errorProperty})
→ DiagnosticsNode
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Returns a description of the Widget associated with the current build context.
inherited
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detachRenderObject()
→ void
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Remove renderObject from the render tree.
inherited
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didChangeDependencies()
→ void
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Called when a dependency of this element changes.
inherited
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dispatchNotification(Notification notification)
→ void
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Start bubbling this notification at the given build context.
inherited
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doesDependOnInheritedElement(InheritedElement ancestor)
→ bool
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Returns
true if dependOnInheritedElement was previously called with ancestor.
inherited
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findAncestorRenderObjectOfType<T extends RenderObject>()
→ T?
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Returns the RenderObject object of the nearest ancestor RenderObjectWidget widget
that is an instance of the given type
T.
inherited
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findAncestorStateOfType<T extends State<StatefulWidget>>()
→ T?
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Returns the State object of the nearest ancestor StatefulWidget widget
that is an instance of the given type
T.
inherited
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findAncestorWidgetOfExactType<T extends Widget>()
→ T?
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Returns the nearest ancestor widget of the given type
T, which must be the
type of a concrete Widget subclass.
inherited
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findRenderObject()
→ RenderObject?
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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
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findRootAncestorStateOfType<T extends State<StatefulWidget>>()
→ T?
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Returns the State object of the furthest ancestor StatefulWidget widget
that is an instance of the given type
T.
inherited
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forgetChild(Element child)
→ void
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Remove the given child from the element's child list, in preparation for
the child being reused elsewhere in the element tree.
inherited
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getDependencies(Element dependent)
→ Object?
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Returns the dependencies value recorded for
dependent
with setDependencies.
inherited
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getElementForInheritedWidgetOfExactType<T extends InheritedWidget>()
→ InheritedElement?
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Obtains the element corresponding to the nearest widget of the given type
T,
which must be the type of a concrete InheritedWidget subclass.
inherited
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getInheritedWidgetOfExactType<T extends InheritedWidget>()
→ T?
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Returns the nearest widget of the given InheritedWidget subclass
T or
null if an appropriate ancestor is not found.
inherited
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inflateWidget(Widget newWidget, Object? newSlot)
→ Element
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Create an element for the given widget and add it as a child of this
element in the given slot.
inherited
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markNeedsBuild()
→ void
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Marks the element as dirty and adds it to the global list of widgets to
rebuild in the next frame.
inherited
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mount(Element? parent, Object? newSlot)
→ void
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Add this element to the tree in the given slot of the given parent.
inherited
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noSuchMethod(Invocation invocation)
→ dynamic
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Invoked when a nonexistent method or property is accessed.
inherited
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notify()
→ void
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inherited
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notifyClients(covariant InheritedWidget oldWidget)
→ void
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Notifies all dependent elements that this inherited widget has changed, by
calling Element.didChangeDependencies.
inherited
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notifyDependent(covariant InheritedWidget oldWidget, Element dependent)
→ void
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Called by notifyClients for each dependent.
inherited
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onNotification(Notification notification)
→ bool
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Called when a notification of the appropriate type arrives at this
location in the tree.
inherited
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performRebuild()
→ void
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Calls the StatelessWidget.build method of the StatelessWidget object
(for stateless widgets) or the State.build method of the State object
(for stateful widgets) and then updates the widget tree.
inherited
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reassemble()
→ void
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Called whenever the application is reassembled during debugging, for
example during hot reload.
inherited
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rebuild({bool force = false})
→ void
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Cause the widget to update itself. In debug builds, also verify various
invariants.
inherited
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removeDependent(Element dependent)
→ void
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Called by Element.deactivate to remove the provided
dependent Element from this InheritedElement.
inherited
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setDependencies(Element dependent, Object? value)
→ void
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Sets the value returned by getDependencies value for
dependent.
inherited
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toDiagnosticsNode({String? name, DiagnosticsTreeStyle? style})
→ DiagnosticsNode
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Returns a debug representation of the object that is used by debugging
tools and by DiagnosticsNode.toStringDeep.
inherited
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toString({DiagnosticLevel minLevel = DiagnosticLevel.info})
→ String
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A string representation of this object.
inherited
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toStringDeep({String prefixLineOne = '', String? prefixOtherLines, DiagnosticLevel minLevel = DiagnosticLevel.debug})
→ String
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Returns a string representation of this node and its descendants.
inherited
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toStringShallow({String joiner = ', ', DiagnosticLevel minLevel = DiagnosticLevel.debug})
→ String
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Returns a one-line detailed description of the object.
inherited
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toStringShort()
→ String
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A short, textual description of this element.
inherited
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unmount()
→ void
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Transition from the "inactive" to the "defunct" lifecycle state.
inherited
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update(covariant ProxyWidget newWidget)
→ void
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Change the widget used to configure this element.
inherited
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updateChild(Element? child, Widget? newWidget, Object? newSlot)
→ Element?
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Update the given child with the given new configuration.
inherited
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updateChildren(List<Element> oldChildren, List<Widget> newWidgets, {Set<Element>? forgottenChildren, List<Object?>? slots})
→ List<Element>
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Updates the children of this element to use new widgets.
inherited
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updated(covariant ServiceWidget<Service> oldWidget)
→ void
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Calls Element.didChangeDependencies of all dependent elements, if
InheritedWidget.updateShouldNotify returns true.
inherited
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updateDependencies(Element dependent, Object? aspect)
→ void
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Called by dependOnInheritedWidgetOfExactType when a new
dependent is added.
inherited
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updateShouldNotify()
→ bool
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inherited
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updateSlot(Object? newSlot)
→ void
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Called by updateSlotForChild when the framework needs to change the slot
that this Element occupies in its ancestor.
inherited
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updateSlotForChild(Element child, Object? newSlot)
→ void
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Change the slot that the given child occupies in its parent.
inherited
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visitAncestorElements(ConditionalElementVisitor visitor)
→ void
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Walks the ancestor chain, starting with the parent of this build context's
widget, invoking the argument for each ancestor.
inherited
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visitChildElements(ElementVisitor visitor)
→ void
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Wrapper around visitChildren for BuildContext.
inherited
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visitChildren(ElementVisitor visitor)
→ void
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Calls the argument for each child. Must be overridden by subclasses that
support having children.
inherited
