// Define, instantiate and register a MouseListener object
this.addMouseListener(new MouseAdapter() {
public void mousePressed(MouseEvent e) {
last_x = e.getX();
last_y = e.getY();
}
});
// Define, instantiate and register a MouseMotionListener object
this.addMouseMotionListener(new MouseMotionAdapter() {
public void mouseDragged(MouseEvent e) {
Graphics g = getGraphics();
int x = e.getX(), y = e.getY();
g.setColor(Color.black);
g.drawLine(last_x, last_y, x, y);
last_x = x; last_y = y;
}
});
// Create a clear button
Button b = new Button("Clear");
// Define, instantiate, and register a listener to handle button presses
b.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) { // clear the scribble
Graphics g = getGraphics();
g.setColor(getBackground());
g.fillRect(0, 0, getSize().width, getSize().height);
}
});
// And add the button to the applet
this.add(b);
