/**
*
*/
package de.tutorials;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.swing.JFrame;
import javax.swing.JPanel;
/**
* @author Tom
*
*/
public class RolloverExample extends JFrame {
public RolloverExample() {
super("RolloverExample");
setDefaultCloseOperation(EXIT_ON_CLOSE);
add(new RolloverPanel(new File("c:/Sonnenuntergang.jpg"), new File(
"c:/Wasserlilien.jpg")));
pack();
setVisible(true);
}
/**
* @param args
*/
public static void main(String[] args) {
new RolloverExample();
}
class RolloverPanel extends JPanel {
BufferedImage overImage, outImage;
boolean showOut = true;
public RolloverPanel(File overImage, File outImage) {
try {
this.overImage = ImageIO.read(overImage);
this.outImage = ImageIO.read(outImage);
} catch (IOException e) {
e.printStackTrace();
}
setPreferredSize(new Dimension(this.overImage.getWidth(),
this.overImage.getHeight()));
addMouseListener(new MouseAdapter() {
public void mouseEntered(MouseEvent e) {
showOut = false;
repaint();
}
public void mouseExited(MouseEvent e) {
showOut = true;
repaint();
}
});
}
protected void paintComponent(Graphics g) {
super.paintComponent(g);
Image img = showOut ? outImage : overImage;
g.drawImage(img, 0, 0, this);
}
}
}
