package zadanie;

import java.awt.BorderLayout;
import java.awt.Canvas;
import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Point;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.util.ArrayList;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JPanel;

class Ekran extends Canvas {

    static boolean pr1 = true;
    static boolean pr2 = false;
    static boolean pr3 = false;
    static boolean pr4 = false;
    public int a, b;
    public int x, y;
    ArrayList<Point> points = new ArrayList<Point>();

    Ekran() {
        super();

        addMouseListener(new MouseAdapter() {
            @Override
            public void mousePressed(MouseEvent me) {
                x = me.getX();
                y = me.getY();
                points.add(new Point(x, y));
                repaint();
            }
        });
    }

    @Override
    public void paint(Graphics g) {
        int x2, y2;

        Graphics2D g2 = (Graphics2D) g;
        g2.setColor(Color.RED);
        for (Point p : points) {
            x2 = (int) p.getX();
            y2 = (int) p.getY();
            if (pr1 == true) {
                g2.drawRect(x2, y2, 10, 20);

            } else if (pr2 == true) {
                g2.drawRect(x2, y2, 20, 40);
            } else if (pr3 == true) {
                g2.drawRect(x2, y2, 40, 80);
            } else {
                g2.drawRect(x2, y2, 100, 200);
            }
        }
    }

}

public class Zadanie extends JFrame {

    JPanel panel;
    static JPanel paneldwa;
    static JComboBox kombobox;
    static JButton x;

    Zadanie() {
        super();
        setSize(1000, 1000);
        panel = new JPanel(new FlowLayout(FlowLayout.CENTER));
        kombobox = new JComboBox();
        kombobox.addItem("1");
        kombobox.addItem("2");
        kombobox.addItem("3");
        kombobox.addItem("4");
        kombobox.addActionListener(new B1());
        panel.add(kombobox);
        this.add(panel, BorderLayout.NORTH);
        setVisible(true);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }

    public class B1 implements ActionListener {

        @Override
        public void actionPerformed(ActionEvent e) {
            String s = String.valueOf(kombobox.getSelectedItem());
            if (s.equals("1")) {
                Ekran.pr1 = true;
                Ekran.pr2 = false;
                Ekran.pr3 = false;
                Ekran.pr4 = false;
            } else if (s.equals("2")) {
                Ekran.pr2 = true;
                Ekran.pr1 = false;
                Ekran.pr3 = false;
                Ekran.pr4 = false;

            } else if (s.equals("3")) {
                Ekran.pr3 = true;
                Ekran.pr1 = false;
                Ekran.pr2 = false;
                Ekran.pr4 = false;
            } else {
                Ekran.pr1 = false;
                Ekran.pr2 = false;
                Ekran.pr3 = false;
                Ekran.pr4 = true;
            }

        }

    }

    public static void main(String[] args) {
        Zadanie adam = new Zadanie();
        Ekran kanwas = new Ekran();
        adam.add(kanwas);

    }

}