Container.Hierarchical with Tree component

Vaadin 6 / 7 / 8 Framework UI
1

I am posting this here even though this touches Data Binding forum too.

We are using a subclassed Tree (nothing changed, constructors just call default Tree constructors) and our own Container.Hierarchical (need to support lazy loading, etc.).
Current problem is that when we remove one leaf node from the tree, it is removed from the subclassed tree but the tree wont respond anymore to any clicks.
This can only be solved by restarting the Application and then everything is okay yet again.

I understand that this is quite a hazy description.

2

Hi,

Hmm… sounds strange - do you know if this occurs with the “standard” container as well?

Best Regards,
Marc

3

I investigated some more, and it seems HierarchicalContainer will claim that a item has children if it has previously had children. Which is odd, and might actually be causing your problem. I’ll investigate some more…

4

I do not think we can use the standard HierarchicalContainer as we are using our own Item implementation and do not even implement addItem-methods.

5

Yeah, I just wanted to know if you have tried it, so that we can pinpoint the problem. I was unable to reproduce the problem with a small test myself.

If the tree stops responding, something is probably throwing, either client or server. Can you try the application in hosted mode, and also verify that no exeptions occur on the server?

One more thing: do you actually have to restart the application to make it work again? Browser reload is not enough?

//Marc

6

We got the problem fixed. It seems that it had something to do with firing ItemSetChangeEvents, but I haven’t really had time to pinpoint the failure.