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Vaadin Forum3. Vaadin 6, 7, 8Framework UI

How to display children for a MenuItem with a Command?

Mikko Kurki-Suonio
6 years ago Nov 15, 2016 1:46pm

I'm trying to avoid pre-populating menus due to performance reasons, so I want to populate the sub-menus only when the top level menu item is clicked.

If the top level MenuItem has a Command to process the incoming click, it CAN have visible children and with the debugger I can even see the server sending them to the browser...

...but the browser won't actually display them...

...until I set the top level command to NULL.

So far the best result I've managed is to populate the sub-menu on the first click, set to the command to null and then on the SECOND click the sub-items are actually shown.

Is there a better way to do this?