Drag an undecorated window of JavaFX ##javafx

MainController.java

@FXML
    private StackPane parentPane;

    double xOffset;
    double yOffset;
    
    @FXML
    void handleOnMouseDraggedBtnCtrlMainView(MouseEvent event) {
        Stage stage = ( Stage ) parentPane.getScene().getWindow();
        stage.setX(event.getScreenX() + xOffset);
        stage.setY(event.getScreenY() + yOffset);
    }
    @FXML
    void handleOnMousePressedBtnCtrlMainView(MouseEvent event) {
        Stage stage = ( Stage ) parentPane.getScene().getWindow();
        xOffset = stage.getX() - event.getScreenX();
        yOffset = stage.getY() - event.getScreenY();
    }