Gwt Vaadin Integration

I am having a vaadin class which creates a popup window there is a save button in the window,I want to notify the Gwt widget when the save button is clicked what to do with it,can anyone help me???

Did you manage to get a solution for this?

I would either try to wrap the Gwt widget into a Vaadin widget or do a simple client-side extension which would handle the notifying in the client-side. Are you using Vaadin 6 or 7?