how to rotate a imageicon?

import java.awt.Graphics2D;

import java.awt.event.*;

import java.awt.geom.AffineTransform;

import java.awt.image.BufferedImage;

import java.net.URL;

import javax.swing.*;

public class IconRotation implements ActionListener {

JLabel label;

ImageIcon icon;

int angle = 90;

public void actionPerformed(ActionEvent e) {

String ac = e.getActionCommand();

if(ac.equals("CCW"))

angle = -90;

else

angle = 90;// degrees clockwise

rotateIcon();

label.setIcon(icon);

}

private void rotateIcon() {

int w = icon.getIconWidth();

int h = icon.getIconHeight();

int type = BufferedImage.TYPE_INT_RGB; // other options, see api

BufferedImage image = new BufferedImage(h, w, type);

Graphics2D g2 = image.createGraphics();

double x = (h - w)/2.0;

double y = (w - h)/2.0;

AffineTransform at = AffineTransform.getTranslateInstance(x, y);

at.rotate(Math.toRadians(angle), w/2.0, h/2.0);

g2.drawImage(icon.getImage(), at, label);

g2.dispose();

icon = new ImageIcon(image);

}

private JLabel getCenter() {

URL url = getClass().getResource("images/cougar.jpg");

icon = new ImageIcon(url);

label = new JLabel(icon, JLabel.CENTER);

return label;

}

private JPanel getUIPanel() {

String[] ids = { "ccw", "cw" };

JPanel panel = new JPanel();

for(int j = 0; j < ids.length; j++) {

JButton button = new JButton(ids[j]);

button.setActionCommand(ids[j].toUpperCase());

button.addActionListener(this);

panel.add(button);

}

return panel;

}

public static void main(String[] args) {

IconRotation test = new IconRotation();

JFrame f = new JFrame();

f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

f.getContentPane().add(test.getCenter());

f.getContentPane().add(test.getUIPanel(), "Last");

f.setSize(500,500);

f.setLocation(200,100);

f.setVisible(true);

}

}

crwooda at 2007-7-12 10:01:59 >