An Element that uses a StatefulWidget as its configuration.

Inheritance

Constructors

StatefulElement(StatefulWidget widget)
Creates an element that uses the given widget as its configuration.

Properties

state State<StatefulWidget>
The State instance associated with this location in the tree. [...]
read-only
depth int
An integer that is guaranteed to be greater than the parent's, if any. The element at the root of the tree must have a depth greater than 0.
read-only, inherited
dirty bool
Returns true if the element has been marked as needing rebuilding.
read-only, inherited
hashCode int
The hash code for this object. [...]
read-only, inherited
owner BuildOwner
The object that manages the lifecycle of this element.
read-only, inherited
renderObject RenderObject
The render object at (or below) this location in the tree. [...]
read-only, inherited
runtimeType Type
A representation of the runtime type of the object.
read-only, inherited
size Size
The size of the RenderBox returned by findRenderObject. [...]
read-only, inherited
slot → dynamic
Information set by parent to define where this child fits in its parent's child list. [...]
read-only, inherited
widget Widget
The configuration for this element.
read-only, inherited

Methods

activate() → void
Transition from the "inactive" to the "active" lifecycle state. [...]
build() Widget
Subclasses should override this function to actually call the appropriate build function (e.g., StatelessWidget.build or State.build) for their widget.
deactivate() → void
Transition from the "active" to the "inactive" lifecycle state. [...]
debugFillProperties(DiagnosticPropertiesBuilder description) → void
didChangeDependencies() → void
Called when a dependency of this element changes. [...]
inheritFromWidgetOfExactType(Type targetType) InheritedWidget
unmount() → void
Transition from the "inactive" to the "defunct" lifecycle state. [...]
update(StatefulWidget newWidget) → void
Change the widget used to configure this element. [...]
ancestorInheritedElementForWidgetOfExactType(Type targetType) InheritedElement
Obtains the element corresponding to the nearest widget of the given type, which must be the type of a concrete InheritedWidget subclass. [...]
inherited
ancestorRenderObjectOfType(TypeMatcher matcher) RenderObject
Returns the RenderObject object of the nearest ancestor RenderObjectWidget widget that matches the given TypeMatcher. [...]
inherited
ancestorStateOfType(TypeMatcher matcher) State
Returns the State object of the nearest ancestor StatefulWidget widget that matches the given TypeMatcher. [...]
inherited
ancestorWidgetOfExactType(Type targetType) Widget
Returns the nearest ancestor widget of the given type, which must be the type of a concrete Widget subclass. [...]
inherited
attachRenderObject(newSlot) → void
Add renderObject to the render tree at the location specified by slot. [...]
inherited
deactivateChild(Element child) → void
Move the given element to the list of inactive elements and detach its render object from the render tree. [...]
@protected, inherited
debugDeactivated() → void
Called, in debug mode, after children have been deactivated (see deactivate). [...]
@mustCallSuper, inherited
debugDescribeChildren() List<DiagnosticsNode>
Returns a list of DiagnosticsNode objects describing this node's children. [...]
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
detachRenderObject() → void
Remove renderObject from the render tree. [...]
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
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
inflateWidget(Widget newWidget, newSlot) Element
Create an element for the given widget and add it as a child of this element in the given slot. [...]
@protected, 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, newSlot) → void
Add this element to the tree in the given slot of the given parent. [...]
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed. [...]
inherited
performRebuild() → void
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
rebuild() → void
Called by the BuildOwner when BuildOwner.scheduleBuildFor has been called to mark this element dirty, by mount when the element is first built, and by update when the widget has changed.
inherited
rootAncestorStateOfType(TypeMatcher matcher) State
Returns the State object of the furthest ancestor StatefulWidget widget that matches the given TypeMatcher. [...]
inherited
toDiagnosticsNode({String name, DiagnosticsTreeStyle style }) DiagnosticsNode
Returns a debug representation of the object that is used by debugging tools and by toStringDeep. [...]
inherited
toString({DiagnosticLevel minLevel: DiagnosticLevel.debug }) String
Returns 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
updateChild(Element child, Widget newWidget, newSlot) Element
Update the given child with the given new configuration. [...]
@protected, inherited
updateSlotForChild(Element child, newSlot) → void
Change the slot that the given child occupies in its parent. [...]
@protected, inherited
visitAncestorElements(bool visitor(Element element)) → void
Walks the ancestor chain, starting with the parent of this build context's widget, invoking the argument for each ancestor. The callback is given a reference to the ancestor widget's corresponding Element object. The walk stops when it reaches the root widget or when the callback returns false. The callback must not return null. [...]
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

Operators

operator ==(Object other) bool
The equality operator. [...]
inherited