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import java.awt.Color;
import java.awt.Container;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.MediaTracker;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionAdapter;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.image.BufferedImage;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.TitledBorder;
public class BufferedImageMouseDrag extends JFrame {
DisplayCanvas canvas;
public BufferedImageMouseDrag() {
super();
Container container = getContentPane();
canvas = new DisplayCanvas();
container.add(canvas);
addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
setSize(450, 400);
setVisible(true);
}
public static void main(String arg[]) {
new BufferedImageMouseDrag();
}
}
class DisplayCanvas extends JPanel {
int x, y;
BufferedImage bi;
DisplayCanvas() {
setBackground(Color.white);
setSize(450, 400);
addMouseMotionListener(new MouseMotionHandler());
Image image = getToolkit().getImage("largeJava2sLogo.gif");
MediaTracker mt = new MediaTracker(this);
mt.addImage(image, 1);
try {
mt.waitForAll();
} catch (Exception e) {
System.out.println("Exception while loading image.");
}
if (image.getWidth(this) == -1) {
System.out.println("no gif file");
System.exit(0);
}
bi = new BufferedImage(image.getWidth(this), image.getHeight(this),
BufferedImage.TYPE_INT_ARGB);
Graphics2D big = bi.createGraphics();
big.drawImage(image, 0, 0, this);
}
public void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D g2D = (Graphics2D) g;
g2D.drawImage(bi, x, y, this);
}
class MouseMotionHandler extends MouseMotionAdapter {
public void mouseDragged(MouseEvent e) {
x = e.getX();
y = e.getY();
repaint();
}
}
}
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