JavaScriptComponentState question

I am busy connecting a javascript gantt via the code in the link with Vaadin. It is working and now I want to modify the gantt in a way so that I can change dates and duration in the gantt. The question I have is. Is it possible that Vaadin pickup the changed dates and duration so that I can update my resource-planning tool.

My gantt example:

Example code for the project:

Chris Gerrist