What happened to the WidgetTree component?

Support
#1

It seems to have vanished?

Is there some other way to build a tree made of other GUI components?

#2

Hi,

Since CUBA 7 uses Vaadin 8, the underlying Tree implementation has changed dramatically. In Vaadin 8, the Tree component is no longer a standalone component, instead, it is a single-column TreeGrid with a specific column renderer that provides expand/collapse functionality. It was impossible to update WidgetsTree to Vaadin 8, as a result, CUBA 7 has no such component.

Regards,
Gleb

#3

Mmm. Okay, is there a good place to start to get the same sort of functionality?

I’m looking to adding a different component as a tree row depending on the data available.

#4

You could try using a DataTreeGrid with a single column and no header, add a generated column with components and ComponentRendere, but in this case, you need to implement a special TreeComponentRenderer, otherwise expand/collapse functionality will be lost.

#5

Right, something like this?

https://demo10.cuba-platform.com/sampler/#main/0/sample?id=datagrid-detailsgenerator

#6

DetailsGenerator isn’t a renderer. It allows to open a special pane with arbitrary layout. Tree supports DetailsGenerator starting from 7.2. As an option, you can try to open all details for all rows when the screen is opened.

#7

Thanks, I’ll play around with it; the DetailsGenerator might do the trick.