navigator_observer_delegate.dart

navigator_observer_delegate.dart

// utility class so that you don't have to extend from [NavigatorObserver] but rather
/// pass the function you want
class NavigatorObserverDelegate extends NavigatorObserver {
  NavigatorObserverDelegate(
      {this.onDidPush,
      this.onDidPop,
      this.onDidRemove,
      this.onDidReplace,
      this.onDidStartUserGesture,
      this.onDidStopUserGesture});

  final Function(Route<dynamic> route, Route<dynamic> previousRoute) onDidPush;
  final Function(Route<dynamic> route, Route<dynamic> previousRoute) onDidPop;
  final Function(Route<dynamic> route, Route<dynamic> previousRoute)
      onDidRemove;
  final Function({Route<dynamic> newRoute, Route<dynamic> oldRoute})
      onDidReplace;
  final Function(Route<dynamic> route, Route<dynamic> previousRoute)
      onDidStartUserGesture;
  final Function() onDidStopUserGesture;

  @override
  void didPush(Route<dynamic> route, Route<dynamic> previousRoute) {
    onDidPush?.call(route, previousRoute);
  }

  @override
  void didPop(Route<dynamic> route, Route<dynamic> previousRoute) {
    onDidPop?.call(route, previousRoute);
  }

  @override
  void didRemove(Route<dynamic> route, Route<dynamic> previousRoute) {
    onDidRemove?.call(route, previousRoute);
  }

  @override
  void didReplace({Route<dynamic> newRoute, Route<dynamic> oldRoute}) {
    onDidReplace?.call(newRoute: newRoute, oldRoute: oldRoute);
  }

  @override
  void didStartUserGesture(Route<dynamic> route, Route<dynamic> previousRoute) {
    onDidStartUserGesture?.call(route, previousRoute);
  }

  @override
  void didStopUserGesture() {
    onDidStopUserGesture?.call();
  }
}