Get x,y touch in embedded object


This is my first approach to the Vaadin framework and I have the following problem: I see (by means of the Embedded object) a PDF read locally.
I would like to get the coordinates of where I touched considering that I can zoom the image of the same PDF.

Some precious advice?

Any hints please?

For those in the same problem I solved by adding pdfviewer addon on a layout. From the layout I got the coordinates.