// Demonstrate scroll bars.

import java.awt.*;

import java.awt.event.*;

import java.applet.*;

public class ScrollBarDemo extends Applet implements AdjustmentListener, MouseMotionListener

{

String msg = "";

Scrollbar vertSB, horzSB;

public void init() {

int width = Integer.parseInt(getParameter("width"));

int height = Integer.parseInt(getParameter("height"));

vertSB = new Scrollbar(Scrollbar.VERTICAL,

0, 1, 0, height);

vertSB.setPreferredSize(new Dimension(20, 100));

horzSB = new Scrollbar(Scrollbar.HORIZONTAL,

0, 1, 0, width);

horzSB.setPreferredSize(new Dimension(100, 20));

add(vertSB);

add(horzSB);

// register to receive adjustment events

vertSB.addAdjustmentListener(this);

horzSB.addAdjustmentListener(this);

addMouseMotionListener(this);

}

public void adjustmentValueChanged(AdjustmentEvent ae) {

repaint();

}

// Update scroll bars to reflect mouse dragging.

public void mouseDragged(MouseEvent me) {

int x = me.getX();

int y = me.getY();

vertSB.setValue(y);

horzSB.setValue(x);

repaint();

}

// Necessary for MouseMotionListener

public void mouseMoved(MouseEvent me) {

}

// Display current value of scroll bars.

public void paint(Graphics g) {

msg = "Vertical: " + vertSB.getValue();

msg += ", Horizontal: " + horzSB.getValue();

g.drawString(msg, 6, 160);

// show current mouse drag position

g.drawString("*", horzSB.getValue(),

vertSB.getValue());

}

}