package pf;

import javafx.scene.Group;
import javafx.scene.layout.Pane;
import javafx.scene.paint.Color;
import javafx.scene.shape.Circle;
import javafx.scene.shape.Ellipse;
import javafx.scene.shape.Polygon;

/**
*
* @author
*/
public class Duck extends Group {
private static double EggLong = 18;
private static double EggHigh = 14;

private Ellipse body;

private Ellipse head;

private Circle eye;

private Polygon arch;

private Group group;

private double x;

private double y;

private double rX;

private double rY;

//--------------------------------------------------------------------------
public Duck( double x, double y, double rX, double rY) {

   this.x = x;
   this.y = y;

   this.rX = rX;

   this.rY = rY;

   body = new Ellipse(x, y, rX, rY);

   double r = Math.random()* .5 + .4;       // Choose a color, not too light.
   double g = Math.random()* .5 + .4;
   double b = Math.random()* .5 + .4;
   body.setFill( new Color( r, g, b, 1) );

   r = Math.random()* .5 + .4;       // Choose a color, not too light.
   g = Math.random()* .5 + .4;
   b = Math.random()* .5 + .4;
   head = new Ellipse(x-rX/2, y-rY/2, rX/2, 0.75*rY);
   head.setFill( new Color( r, g, b, 1) );

   eye = new Circle(head.getCenterX()-1, head.getCenterY(), 2);
   //eye.setFill( new Color( r, g, b, 1) );

   arch = new Polygon();
   arch.getPoints().addAll(new Double[]{
         head.getCenterX()-head.getRadiusX() - rY/2, head.getCenterY(),
         head.getCenterX()-head.getRadiusX(), head.getCenterY()-4,
         head.getCenterX()-head.getRadiusX(), head.getCenterY()+4 });

   group = new Group();

   group.getChildren().add(body);
   group.getChildren().add(head);
   group.getChildren().add(eye);
   group.getChildren().add(arch);

   getChildren().add(group);
}

public void setPosX(double d){
   body.setCenterX(d);
   head.setCenterX(d-rX/2);
   eye.setCenterX(head.getCenterX()-1);
   eye.setCenterY(head.getCenterY());

1. Complete the calculator application so that it has the following...