// We used inheritance to create this variation of the built-in Frame class so
// that it would draw some shapes and respond to mouse clicks and drags.

import java.awt.*;

public class CustomFrame extends Frame {
    private int count;
    private int oldX, oldY;

    public void paint(Graphics g) {
        count++;
        System.out.println("call " + count + " on paint");
        g.drawString("Hello World!", 50 + count * 2, 50 + count * 2);
        g.setColor(Color.YELLOW);
        g.fillRect(50, 100, 25 + 4 * count, 25 + 4 * count);
    }
        
    public boolean mouseUp(Event e, int x, int y) {
        System.out.println("(" + x + ", " + y + ")");
        Graphics g = getGraphics();
        g.setColor(Color.BLUE);
        g.fillOval(x - 5, y - 5, 10, 10);
        oldX = x;
        oldY = y;
        return true;
    }

    public boolean mouseDown(Event e, int x, int y) {
        System.out.println("(" + x + ", " + y + ")");
        Graphics g = getGraphics();
        g.setColor(Color.BLUE);
        g.fillOval(x - 5, y - 5, 10, 10);
        oldX = x;
        oldY = y;
        return true;
    }
        
    public boolean mouseDrag(Event e, int x, int y) {
        Graphics g = getGraphics();
        g.setColor(Color.RED);
        g.drawLine(oldX, oldY, x, y);
        oldX = x;
        oldY = y;
        return true;
    }
}