redimensionnable et non rectangle

Avec le code suivant (grâce à plusieurs postes ici), je dessine un rectangle, que je veux être redimensionnable et non.
Deux ancres (le coin supérieur gauche et inférieur droit) faire ce que je veux, et la dernière (en bas au milieu) se déplace le rectangle, mais les deux premiers ancrages de ne pas suivre le rectangle.

Quand je les faire bouger, l'Auditeur d'entre eux, permet de redimensionner le rectangle.

package application;
import javafx.application.Application;
import javafx.beans.property.DoubleProperty;
import javafx.beans.property.SimpleDoubleProperty;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.event.EventHandler;
import javafx.scene.Cursor;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.input.MouseEvent;
import javafx.scene.paint.Color;
import javafx.scene.shape.Circle;
import javafx.scene.shape.Rectangle;
import javafx.scene.shape.Shape;
import javafx.scene.shape.StrokeType;
import javafx.stage.Stage;
import javafx.stage.StageStyle;
public class Main extends Application {
private Rectangle rectangle;
private Group group;
private Scene scene;
private Stage primaryStage;
private ObservableList<Double> Coins;
public static void main(String[] args) {
Application.launch(args);
}
@Override
public void start(Stage primaryStage) {
group = new Group();        
rectangle = new Rectangle(200,200,400,300);
Coins = FXCollections.observableArrayList();
//UpperLeft
Coins.add(rectangle.getX());
Coins.add(rectangle.getY());
//LowerRight
Coins.add(rectangle.getX() + rectangle.getWidth());
Coins.add(rectangle.getY()+ rectangle.getHeight());
//Moving
Coins.add(rectangle.getX() + (rectangle.getWidth()/2));
Coins.add(rectangle.getY()+ (rectangle.getHeight()));
group.getChildren().addAll(createControlAnchorsFor(Coins));
group.getChildren().add(rectangle);
scene = new Scene(group,800,800);
primaryStage.setScene(scene);
primaryStage.show();
}
//@return a list of anchors which can be dragged around to modify points in the format [x1, y1, x2, y2...]
private ObservableList<Anchor> createControlAnchorsFor(final ObservableList<Double> points) {
ObservableList<Anchor> anchors = FXCollections.observableArrayList();
//Coin GaucheHaut
DoubleProperty xProperty = new SimpleDoubleProperty(points.get(0));
DoubleProperty yProperty = new SimpleDoubleProperty(points.get(1));
xProperty.addListener(new ChangeListener<Number>() {
@Override public void changed(ObservableValue<? extends Number> ov, Number oldX, Number x) {
System.out.println(oldX + " et " + x);
rectangle.setX((double) x);  
rectangle.setWidth((double) rectangle.getWidth() -((double) x- (double) oldX)); 
anchors.get(2).setCenterX((double) x + rectangle.getWidth()/2 );
}
});
yProperty.addListener(new ChangeListener<Number>() {
@Override public void changed(ObservableValue<? extends Number> ov, Number oldY, Number y) {
rectangle.setY((double) y);  
rectangle.setHeight((double) rectangle.getHeight() -((double) y- (double) oldY)); 
}
});
anchors.add(new Anchor(Color.GOLD, xProperty, yProperty));
//Coin DroiteBas
DoubleProperty xProperty2 = new SimpleDoubleProperty(points.get(2));
DoubleProperty yProperty2 = new SimpleDoubleProperty(points.get(3));
xProperty2.addListener(new ChangeListener<Number>() {
@Override public void changed(ObservableValue<? extends Number> ov, Number oldX, Number x) {
rectangle.setWidth((double) rectangle.getWidth() -((double) oldX- (double) x)); 
anchors.get(2).setCenterX((double) x - rectangle.getWidth()/2 );
}
});
yProperty2.addListener(new ChangeListener<Number>() {
@Override public void changed(ObservableValue<? extends Number> ov, Number oldY, Number y) {
rectangle.setHeight((double) rectangle.getHeight() -((double) oldY- (double) y));
anchors.get(2).setCenterY((double) y);
}
});
anchors.add(new Anchor(Color.GOLD, xProperty2, yProperty2));
//Moving
DoubleProperty xPropertyM = new SimpleDoubleProperty(points.get(4));
DoubleProperty yPropertyM = new SimpleDoubleProperty(points.get(5));
xPropertyM.addListener(new ChangeListener<Number>() {
@Override public void changed(ObservableValue<? extends Number> ov, Number oldX, Number x) {
rectangle.setX((double) x - rectangle.getWidth()/2 );
//anchors.get(0).setCenterX((double) x- rectangle.getWidth()/2);
//anchors.get(0).setVisible(false);
}
});
yPropertyM.addListener(new ChangeListener<Number>() {
@Override public void changed(ObservableValue<? extends Number> ov, Number oldY, Number y) { 
rectangle.setY((double) y - rectangle.getHeight() ); 
Coins.set(1, (double) y);
}
});
anchors.add(new Anchor(Color.GOLD, xPropertyM, yPropertyM));
return anchors;
}
//a draggable anchor displayed around a point.
class Anchor extends Circle {
private final DoubleProperty x, y;
Anchor(Color color, DoubleProperty x, DoubleProperty y) {
super(x.get(), y.get(), 20);
setFill(color.deriveColor(1, 1, 1, 0.5));
setStroke(color);
setStrokeWidth(2);
setStrokeType(StrokeType.OUTSIDE);
this.x = x;
this.y = y;
x.bind(centerXProperty());
y.bind(centerYProperty());
enableDrag();
}
//make a node movable by dragging it around with the mouse.
private void enableDrag() {
final Delta dragDelta = new Delta();
setOnMousePressed(new EventHandler<MouseEvent>() {
@Override public void handle(MouseEvent mouseEvent) {
//record a delta distance for the drag and drop operation.
dragDelta.x = getCenterX() - mouseEvent.getX();
dragDelta.y = getCenterY() - mouseEvent.getY();
getScene().setCursor(Cursor.MOVE);
}
});
setOnMouseReleased(new EventHandler<MouseEvent>() {
@Override public void handle(MouseEvent mouseEvent) {
getScene().setCursor(Cursor.HAND);
}
});
setOnMouseDragged(new EventHandler<MouseEvent>() {
@Override public void handle(MouseEvent mouseEvent) {
double newX = mouseEvent.getX() + dragDelta.x;
if (newX > 0 && newX < getScene().getWidth()) {
setCenterX(newX);
}
double newY = mouseEvent.getY() + dragDelta.y;
if (newY > 0 && newY < getScene().getHeight()) {
setCenterY(newY);
}
//Recompute screen;
group.getChildren().add(rectangle);
scene = new Scene(group,800,800);;
primaryStage.setScene(scene);
}
});
setOnMouseEntered(new EventHandler<MouseEvent>() {
@Override public void handle(MouseEvent mouseEvent) {
if (!mouseEvent.isPrimaryButtonDown()) {
getScene().setCursor(Cursor.HAND);
}
}
});
setOnMouseExited(new EventHandler<MouseEvent>() {
@Override public void handle(MouseEvent mouseEvent) {
if (!mouseEvent.isPrimaryButtonDown()) {
getScene().setCursor(Cursor.DEFAULT);
}
}
});
}
//records relative x and y co-ordinates.
private class Delta { double x, y; }
}
}

Une idée, quoi et où devrais-je ajouter quelque chose ?