import java.applet.*;
import java.awt.*;

public class Scribble extends Applet {
	private int last_x, last_y;
	private Color current_color = Color.black;
	private Button clear_button;
	private Choice color_choices;

	public void init() {
		this.setBackground(Color.white);

			clear_button = new Button("Clear");
		clear_button.setForeground(Color.black);
		clear_button.setBackground(Color.lightGray);
		this.add(clear_button);

		color_choices = new Choice();
		color_choices.addItem("black");
		color_choices.addItem("red");
		color_choices.addItem("yellow");
		color_choices.addItem("green");
		color_choices.addItem("blue");
		color_choices.setForeground(Color.black);
		color_choices.setBackground(Color.lightGray);
		this.add(new Label("Color: "));
		this.add(color_choices);
	}

	public boolean mouseDown(Event e, int x, int y) {
		last_x = x; last_y = y;
		return true;
	}

	public boolean mouseDrag(Event e, int x, int y) {
		Graphics g = this.getGraphics();
		g.setColor(current_color);
		g.drawLine(last_x, last_y, x, y);
		last_x = x;
		last_y = y;
		return true;
	}

	public boolean action(Event event, Object arg) {
		if (event.target == clear_button) {
			Graphics g = this.getGraphics();
			Rectangle r = this.bounds();
			g.setColor(this.getBackground());
			g.fillRect(r.x, r.y, r.width, r.height);
			return true;
		} else if (event.target == color_choices) {
			if (arg.equals("black")) current_color = Color.black;
			else if (arg.equals("red")) current_color = Color.red;
			else if (arg.equals("yellow")) current_color = Color.yellow;
			else if (arg.equals("green")) current_color = Color.green;
			else if (arg.equals("blue")) current_color = Color.blue;
			return true;
		}
		else return super.action(event, arg);
	}

}