How to rederect on page (view) load ?

Vaadin 6 / 7 / 8
1

Hello, the scenario is this: User opens View A and enters URL manually to go to View B. In this case I want to redirect the user to another View, because of security settings. So in my View B, in the enter( ViewChangeEvent event ) method, I wrote this:

Navigator nav = new Navigator(myUIObject, ViewC);
nav.addView("/ViewC",ViewC);
nav.navigateTo("/ViewC");

In this case an error is shown: java.lang.IllegalArgumentException: Trying to navigate to an unknown state... Can anyone help please?

2

You don´t use your “nav” variable.

You call methods from “navigator” variable

3

Sorry just a typo mistake, it is the same

4

Don´t use a new Navigator object.

Use the navigator you already use.

You can get the object with

UI.getCurrent().getNavigator()
5

I have a MyUI class that extends UI and I am trying to navigate within my View class, which does not extend UI. I cannot call it that way. Within my MyUI class the navigator is fine, but how to deal within the ViewClass.

6

You cannot display ViewC in ViewC.

You have to give another ViewDisplay/SingleComponentContainer… to the constructor:

Navigator nav = new Navigator(myUIObject, <your container to display ViewC, this cannot be ViewC>);
7

These are separated classes. In my MyUI class I have a container, but this container is not defined in the other classes. Maybe I am not expressing very well, can you please tell me a way to perform navigation from ViewA to ViewB (not classes that extend UI) ?

8

Simply use one Navigator for all. Add all Views you need to the Navigator you have in your UI.

When in any enter method of a view you need to change the view just call

UI.getCurrent().getNavigator().navigateTo();

Your other classes don´t need to know about the container in your UI.

Hope this helps, otherwise I don´t know what you want to do

9

Thank you. I will try and let you know.