Examples with RoutesChangedListener com.vaadin.flow.router.RoutesChangedListener used on opensource projects

Example 1 with RoutesChangedListener

use of com.vaadin.flow.router.RoutesChangedListener in project flow by vaadin.

the class SessionRouteRegistry method addRoutesChangeListener.

/**
 * Adds the given route change listener to the registry.
 * <p>
 * For the session scoped registry also changes to the application scoped
 * registry will be delegated to the listener if the added or removed route
 * was not masked by a registration in the session scope.
 *
 * @param listener
 *            listener to add
 * @return registration to remove the listener
 */
@Override
public Registration addRoutesChangeListener(RoutesChangedListener listener) {
    final Registration parentRegistration = getParentRegistry().addRoutesChangeListener(event -> {
        ConfiguredRoutes configuration = getConfiguration();
        List<RouteBaseData<?>> addedVisible = event.getAddedRoutes().stream().filter(routeData -> !configuration.hasTemplate(routeData.getTemplate())).collect(Collectors.toList());
        List<RouteBaseData<?>> removedVisible = event.getRemovedRoutes().stream().filter(routeData -> !configuration.hasTemplate(routeData.getTemplate())).collect(Collectors.toList());
        // Only fire an event if we have visible changes.
        if (!(addedVisible.isEmpty() && removedVisible.isEmpty())) {
            fireEvent(new RoutesChangedEvent(event.getSource(), addedVisible, removedVisible));
        }
    });
    final Registration registration = super.addRoutesChangeListener(listener);
    return () -> {
        registration.remove();
        parentRegistration.remove();
    };
}