ListenerContext<T>
extension type
Methods
-
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
-
dispatchNotification(Notification notification)
→ void
-
Start bubbling this notification at the given build context.
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
-
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
-
noSuchMethod(Invocation invocation)
→ dynamic
-
Invoked when a nonexistent method or property is accessed.
inherited
-
setValue(T value)
→ void
-
-
toString()
→ String
-
A string representation of this object.
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
-
Walks the children of this widget.
inherited
