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/**
* @version 1.00 1999-09-11
* @author Cay Horstmann
*/
import java.awt.Container;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.geom.Area;
import java.awt.geom.Ellipse2D;
import java.awt.geom.Rectangle2D;
import javax.swing.ButtonGroup;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
public class AreaTest {
public static void main(String[] args) {
JFrame frame = new AreaTestFrame();
frame.show();
}
}
class AreaTestFrame extends JFrame implements ActionListener {
public AreaTestFrame() {
setTitle("AreaTest");
setSize(400, 400);
addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
Container contentPane = getContentPane();
canvas = new AreaPanel();
contentPane.add(canvas, "Center");
JPanel buttonPanel = new JPanel();
ButtonGroup group = new ButtonGroup();
addButton = new JRadioButton("Add", true);
buttonPanel.add(addButton);
group.add(addButton);
addButton.addActionListener(this);
subtractButton = new JRadioButton("Subtract", false);
buttonPanel.add(subtractButton);
group.add(subtractButton);
subtractButton.addActionListener(this);
intersectButton = new JRadioButton("Intersect", false);
buttonPanel.add(intersectButton);
group.add(intersectButton);
intersectButton.addActionListener(this);
exclusiveOrButton = new JRadioButton("Exclusive Or", false);
buttonPanel.add(exclusiveOrButton);
group.add(exclusiveOrButton);
exclusiveOrButton.addActionListener(this);
contentPane.add(buttonPanel, "North");
}
public void actionPerformed(ActionEvent event) {
Object source = event.getSource();
if (source == addButton)
canvas.addAreas();
else if (source == subtractButton)
canvas.subtractAreas();
else if (source == intersectButton)
canvas.intersectAreas();
else if (source == exclusiveOrButton)
canvas.exclusiveOrAreas();
}
private AreaPanel canvas;
private JRadioButton addButton;
private JRadioButton subtractButton;
private JRadioButton intersectButton;
private JRadioButton exclusiveOrButton;
}
class AreaPanel extends JPanel {
public AreaPanel() {
area1 = new Area(new Ellipse2D.Double(100, 100, 150, 100));
area2 = new Area(new Rectangle2D.Double(150, 150, 150, 100));
addAreas();
}
public void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D g2 = (Graphics2D) g;
g2.draw(area1);
g2.draw(area2);
g2.fill(area);
}
public void addAreas() {
area = new Area();
area.add(area1);
area.add(area2);
repaint();
}
public void subtractAreas() {
area = new Area();
area.add(area1);
area.subtract(area2);
repaint();
}
public void intersectAreas() {
area = new Area();
area.add(area1);
area.intersect(area2);
repaint();
}
public void exclusiveOrAreas() {
area = new Area();
area.add(area1);
area.exclusiveOr(area2);
repaint();
}
private Area area;
private Area area1;
private Area area2;
}
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