//Adrian Plusa L1 17.12.2018 spr. 1 zad. 1
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.EventQueue;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.*;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;


public class Kolos extends JFrame {
	Color kolor = Color.BLACK;
    private int n=5;
    private MyComponent komponent=null;

    private class MyComponent extends JComponent{

        @Override
        protected void paintComponent(Graphics g) {
        	g.setColor(kolor);
            int w=getWidth();
            int h=getHeight();
            g.drawLine(0, h/2, w/2, 0);
            g.drawLine(w/2, h,w/2, 0);
            g.drawLine(w/2, h, w, h/2);
            g.drawLine(0, h/2, w/2, h);
            g.drawLine(w/2, 0, w, h/2);
            g.drawLine(0, h/2, w/2, h/2);

            //poziome
            for(int i=0;i<n;i++)
            {
            	g.drawLine(0, h/2+h*i/n, w*i/n, h/2+h*i/n);
            }

            for(int i=0;i<n;i++)
            {
            	if (w*i/n<=w/2)
            	g.drawLine(w/2, h/2, w*i/n, h/2-h*i/n);
            }
            for(int i=0;i<n;i++)
            {

            	g.drawLine(w, h/2, w/2, h-h*i/n);
            }



            super.paintComponent(g);
        }

    }

    public Kolos(String string) {
        super(string);
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        setSize(800,600);
        add(komponent=new MyComponent());
        final JSlider slider=new JSlider(1,20,n);
        slider.addChangeListener(new ChangeListener() {

            @Override
            public void stateChanged(ChangeEvent e) {
                n=slider.getValue();
                komponent.repaint();
            }
        });
        add(slider, BorderLayout.SOUTH);
        setVisible(true);
        JMenuBar mb = new JMenuBar();
        setJMenuBar(mb);
        JMenu m = new JMenu("Kolor");
        mb.add(m);
        JMenuItem mi = new JMenuItem("Czerwony");
        m.add(mi);
        mi.addActionListener(new ActionListener() {

			@Override
			public void actionPerformed(ActionEvent e) {
				kolor = Color.RED;
				komponent.repaint();

			}
		});
        mi = new JMenuItem("Czarny");
        m.add(mi);
        mi.addActionListener(new ActionListener() {

			@Override
			public void actionPerformed(ActionEvent e) {
				kolor = Color.BLACK;
				komponent.repaint();

			}
		});
        mi = new JMenuItem("Niebieski");
        m.add(mi);
        mi.addActionListener(new ActionListener() {

			@Override
			public void actionPerformed(ActionEvent e) {
				kolor = Color.BLUE;
				komponent.repaint();

			}
		});
        setVisible(true);
    }

    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {

            @Override
            public void run() {
                new Kolos("Sprawdzian");
            }
        });
    }

}