route_aware.dart

/// An interface for objects that are aware of their current [Route].
///
/// This is used with [RouteObserver] to make a widget aware of changes to the
/// [Navigator]'s session history.
abstract class RouteAware {
  /// Called when the top route has been popped off, and the current route
  /// shows up.
  void didPopNext() { }

  /// Called when the current route has been pushed.
  void didPush() { }

  /// Called when the current route has been popped off.
  void didPop() { }

  /// Called when a new route has been pushed, and the current route is no
  /// longer visible.
  void didPushNext() { }
}