import java.util.HashSet;
import java.util.Set;
import javafx.application.Application;
import javafx.event.Event;
import javafx.event.EventType;
import javafx.scene.Scene;
import javafx.scene.control.ListView;
import javafx.scene.control.TextArea;
import javafx.scene.control.TextField;
import javafx.scene.layout.BorderPane;
import javafx.stage.Stage;

public class MouseDraggedFailed extends Application {

    @Override
    public void start(Stage stage) throws Exception {
        Set<String> events = new HashSet<>();
        ListView<String> eventList = new ListView<>();
        TextArea area = new TextArea();
       area.addEventHandler(EventType.ROOT, (Event event) -> {
            String evName = event.getEventType().toString();
            if (!events.contains(evName)) {
                eventList.getItems().add(evName);
                events.add(evName);
            }
        });
        area.setOnMousePressed(System.out::println);
        BorderPane root = new BorderPane(area);
        root.setBottom(new TextField("123"));
        root.setRight(eventList);
        stage.setScene(new Scene(root, 640, 480));
        stage.show();
    }

    public static void main(String[] args) {
        launch(args);
    }

}