notifyDependent method Null safety
- covariant InheritedModel<
T> oldWidget, - Element dependent
override
Called by notifyClients for each dependent.
Calls dependent.didChangeDependencies() by default.
Subclasses can override this method to selectively call didChangeDependencies based on the value of getDependencies.
See also:
- updateDependencies, which is called each time a dependency is created with dependOnInheritedWidgetOfExactType.
- getDependencies, which returns the current value for a dependent element.
- setDependencies, which sets the value for a dependent element.
- InheritedModel, which is an example of a class that uses this method to manage dependency values.
Implementation
@override
void notifyDependent(InheritedModel<T> oldWidget, Element dependent) {
final Set<T>? dependencies = getDependencies(dependent) as Set<T>?;
if (dependencies == null) {
return;
}
if (dependencies.isEmpty || (widget as InheritedModel<T>).updateShouldNotifyDependent(oldWidget, dependencies)) {
dependent.didChangeDependencies();
}
}