InheritedWidget class abstract
Base class for widgets that efficiently propagate information down the tree.
To obtain the nearest instance of a particular type of inherited widget from a build context, use BuildContext.dependOnInheritedWidgetOfExactType.
Inherited widgets, when referenced in this way, will cause the consumer to rebuild when the inherited widget itself changes state.
Constructors
- InheritedWidget({Key? key, required Widget child})
-
const
Properties
- child → Widget
-
Child widget.
final
- correspondingTag → DomTagType?
-
Corresponding HTML tag to use to render this widget
no setteroverride
- hashCode → int
-
The hash code for this object.
no setterinherited
- key → Key?
-
Keys help Rad identify which widgets have changed, are added, or are
removed when a widget has multiple sibling widgets.
finalinherited
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
-
widgetCaptureEventListeners
→ Map<
DomEventType, EventCallback?> -
Events that this widget is listening to in capturing phase.
no setterinherited
-
widgetEventListeners
→ Map<
DomEventType, EventCallback?> -
Events that this widget is listening to in bubbling phase.
no setterinherited
Methods
-
createRenderElement(
RenderElement parent) → RenderElement -
Create element for current widget.
override
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
shouldUpdateWidget(
Widget oldWidget) → bool -
Whether to update current widget.
override
-
shouldUpdateWidgetChildren(
Widget oldWidget, bool shouldUpdateWidget) → bool -
Whether to update current widget's children.
inherited
-
toString(
) → String -
A string representation of this object.
inherited
-
updateShouldNotify(
covariant InheritedWidget oldWidget) → bool - Whether the framework should notify widgets that inherit from this widget.
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited