Component, update only 1 out of 3

HI to All,

The requirement would be to update only 1 component out of 3. All 3 components hold vaadin charts where on button click “new popup window” will show. This window would hold 2 date buttons, once they are changed it should update only first chart (first component) and chart should reflect new date frame.

Chart itself is not an issue, I would need t know how to only reference to the first component and issue command to refresh?

Any ideas how to accomplish this?