notifyListeners method Null safety
protected">@protected
Calls all the listeners.
If listeners are added or removed during this function, the modifications will not change which listeners are called during this iteration.
Implementation
@protected
@pragma('vm:notify-debugger-on-exception')
void notifyListeners() {
final List<VoidCallback> localListeners = _listeners.toList(growable: false);
for (final VoidCallback listener in localListeners) {
InformationCollector? collector;
assert(() {
collector = () => <DiagnosticsNode>[
DiagnosticsProperty<AnimationLocalListenersMixin>(
'The $runtimeType notifying listeners was',
this,
style: DiagnosticsTreeStyle.errorProperty,
),
];
return true;
}());
try {
if (_listeners.contains(listener)) {
listener();
}
} catch (exception, stack) {
FlutterError.reportError(FlutterErrorDetails(
exception: exception,
stack: stack,
library: 'animation library',
context: ErrorDescription('while notifying listeners for $runtimeType'),
informationCollector: collector,
));
}
}
}