CODEWITHSUNDEEP
javavaadin
user9507446
user9507446

Reputation: 401

Vaadin Flow: Cannot resolve symbol 'ContactFormEvent' when trying to implements events

I've been trying to implement the events in my contact form, however I get the 'Cannot resolve symbol 'ContactFormEvent'' when trying to implement the following methods:


    public static class SaveEvent extends ContactFormEvent {
        SaveEvent(ContactForm source, Contact contact) {
            super(source, contact);
        }
    }

    public static class DeleteEvent extends ContactFormEvent {
        DeleteEvent(ContactForm source, Contact contact) {
            super(source, contact);
        }

    }

    public static class CloseEvent extends ContactFormEvent {
        CloseEvent(ContactForm source) {
            super(source, null);
        }
    }

Additonally, I've been dealing with the reason: no instance(s) of type variable(s) exist so that CloseEvent conforms to ComponentEvent<?> error for the following methods.

    public Registration addDeleteListener(ComponentEventListener<DeleteEvent> listener) {
        return addListener(DeleteEvent.class, listener);
    }

    public Registration addSaveListener(ComponentEventListener<SaveEvent> listener) {
        return addListener(SaveEvent.class, listener);
    }
    public Registration addCloseListener(ComponentEventListener<CloseEvent> listener) {
        return addListener(CloseEvent.class, listener);
    }

What could be the solution here? I am running out of ideas, it seems like it has to do something with Vaadin's versioning, but I can't find any working solution.

Upvotes: -1

Views: 39

Answers (1)

ollitietavainen
ollitietavainen

Reputation: 4290

ContactFormEvent is not a Vaadin class, it's a custom class coming from somewhere else. You'll need to look into where you got that example code from.

Upvotes: 0

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