Controller.java

package sample;

import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import javafx.scene.SubScene;
import javafx.scene.control.TabPane;
import javafx.scene.input.MouseEvent;

import java.net.URL;
import java.util.ResourceBundle;


public class Controller implements Initializable {

    int count = 0;

    @FXML
    public SubScene SubScene1;
    public  TabPane TabPane1;

    @Override
    public void initialize(URL url, ResourceBundle resourceBundle) {


        SubScene1.addEventHandler(MouseEvent.ANY, me -> {
            if (me.getEventType().equals(MouseEvent.MOUSE_PRESSED)) {
                System.out.println(count + " " + SubScene1.getScene().getFocusOwner().getId());
                count++;
            }
        });


    }

}