JavaFX and Scene Builder - Make Components Draggable

Controller.java

package sample;

import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import javafx.scene.layout.AnchorPane;
import javafx.scene.shape.Rectangle;
import java.net.URL;
import java.util.ResourceBundle;

public class Controller implements Initializable {

    @FXML
    private Rectangle rectangle;

    @FXML
    private AnchorPane anchorPane;


    DraggableMaker draggableMaker = new DraggableMaker();

    @Override
    public void initialize(URL url, ResourceBundle resourceBundle) {
        draggableMaker.makeDraggable(rectangle);
        draggableMaker.makeDraggable(anchorPane);
    }
}

DraggableMaker.java

package sample;

import javafx.scene.Node;

public class DraggableMaker {

    private double mouseAnchorX;
    private double mouseAnchorY;

    public void makeDraggable(Node node){

        node.setOnMousePressed(mouseEvent -> {
            mouseAnchorX = mouseEvent.getX();
            mouseAnchorY = mouseEvent.getY();
        });

        node.setOnMouseDragged(mouseEvent -> {
            node.setLayoutX(mouseEvent.getSceneX() - mouseAnchorX);
            node.setLayoutY(mouseEvent.getSceneY() - mouseAnchorY);
        });
    }
}

Main.java

package sample;

import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;

public class Main extends Application {

    @Override
    public void start(Stage primaryStage) throws Exception{
        Parent root = FXMLLoader.load(getClass().getResource("sample.fxml"));
        primaryStage.setTitle("Hello World");
        primaryStage.setScene(new Scene(root));
        primaryStage.show();
    }


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

sample.fxml

<?xml version="1.0" encoding="UTF-8"?>

<?import javafx.scene.control.Button?>
<?import javafx.scene.control.RadioButton?>
<?import javafx.scene.control.TextField?>
<?import javafx.scene.layout.AnchorPane?>
<?import javafx.scene.shape.Rectangle?>

<AnchorPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="400.0" prefWidth="600.0" xmlns="http://javafx.com/javafx/15.0.1" xmlns:fx="http://javafx.com/fxml/1" fx:controller="sample.Controller">
   <children>
      <Rectangle fx:id="rectangle" arcHeight="5.0" arcWidth="5.0" fill="DODGERBLUE" height="100.0" layoutX="285.0" layoutY="243.0" stroke="BLACK" strokeType="INSIDE" width="100.0" />
      <AnchorPane fx:id="anchorPane" layoutX="100.0" layoutY="26.0" prefHeight="200.0" prefWidth="200.0" style="-fx-background-color: #374829;">
         <children>
            <Button layoutX="33.0" layoutY="41.0" mnemonicParsing="false" text="Button" />
            <Button layoutX="115.0" layoutY="41.0" mnemonicParsing="false" text="Button" />
            <TextField layoutX="26.0" layoutY="143.0" />
            <RadioButton layoutX="92.0" layoutY="97.0" mnemonicParsing="false" />
         </children>
      </AnchorPane>
   </children>
</AnchorPane>