Drawing in a Window - Beginning Java - page 1029

import java.awt.*;
import java.io.Serializable;
import static Constants.SketcherConstants.*;
import java.awt.geom.*;

class Element implements Serializable {
// Code for the base class definition...

// Nested class defining a line...

// Nested class defining a rectangle
public static class Rectangle extends Element {
public Rectangle(Point start, Point end, Color color) {
super(new Point(
Math.min(start.x, end.x), Math.min(start.y,

end.y)), color);
rectangle = new Rectangle2D.Double(
origin.x, origin.y, //

Top-left corner
Math.abs(start.x - end.x), Math.abs(start.y - end.y));// Width
& height
bounds = new java.awt.Rectangle(
Math.min(start.x ,end.x), Math.min(start.y,

end.y),

Math.abs(start.x - end.x)+1, Math.abs(start.y -

end.y)+1);
}

// Display the rectangle
public void draw(Graphics2D g2D) {
g2D.setPaint(color); // Set the

rectangle color
g2D.translate(position.x, position.y); // Move context

origin

g2D.draw(rectangle); // Draw the

rectangle
g2D.translate(-position.x, -position.y); // Move context

origin back
}

// Method to redefine the rectangle
public void modify(Point start, Point last) {
bounds.x = position.x = Math.min(start.x, last.x);
bounds.y = position.y = Math.min(start.y, last.y);
rectangle.width = Math.abs(start.x - last.x);
rectangle.height = Math.abs(start.y - last.y);
bounds.width = (int)rectangle.width +1;
bounds.height = (int)rectangle.height + 1;