JavaServer Faces

Getting the Mouse Click Coordinates

When the request is sent from the client to the server, the mouse click coordinates are given as the values of the request parameters:

where clientId is the ID (as a string) of the component that was clicked.

You get the client ID from the ActionEvent argument e passed to the action listener:

      FacesContext context = FacesContext.getCurrentInstance();
      String clientId = e.getComponent().getClientId(context);

Request parameters are part of the external context of a JSF life cycle. They can be obtained by:

      Map requestParams = 
         context.getExternalContext().getRequestParameterMap();

Now get the request parameter value (as a string) with:

      requestParams.get(clientId + ".x");