import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Graphics;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JPanel;
import javax.swing.JSlider;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;

public class something3 extends JFrame {
      MojKomponent komponent;
        int n=8;
        int rr=128;
        int gg=128;
        int bb=128;
       public class MojKomponent extends JComponent{

        @Override
        protected void paintComponent(Graphics g) {
            g.setColor(new Color(rr,gg,bb));
              int w=getWidth();
              int h=getHeight();
              int ax=w/4;
              int bx=w*3/4;
              int ay=h/4;
              int by=h*3/4;


              g.drawLine(w/2, 0, bx, ay);
              g.drawLine(bx, ay, bx, by);
              g.drawLine(bx, by, ax, ay);
              g.drawLine(ax, ay, ax, by);
              g.drawLine(ax, by, w/2, h);

              for(int i=0;i<n;i++)
              {
                  int y = h*(i+1)/(n+1);
                  int x = w*(i+1)/(n+1);
                  if(y<=ay) {
                      g.drawLine(0, y, w/2+x, y);
                  }
                  else if(y<=by) {
                      g.drawLine(0, y, ax, y);
                      g.drawLine(x, y, bx, y);
                  }
                  else if(y>by) {
                      g.drawLine(0, y, -(w/2)+x, y);
                  }
              }
              for(int i=0;i<n;i++)
              {
                  int y = h*(i+1)/(n+1);
                  int x = w*(i+1)/(n+1);
                  if(x<ax) {}
                  else if(x<=w/2){
                      g.drawLine(x, y, x, h/2+y);
                  }
                  else if(x<=bx) {
                      g.drawLine(x, 0, x, -h/2+y);
                      g.drawLine(x, y, x, h/2+y);
                  }
                  else {
                      g.drawLine(x, 0, x, h);
                  }
              }


            super.paintComponent(g);
        }

       }

    public something3(String string) {
         super(string);
            setDefaultCloseOperation(EXIT_ON_CLOSE);
            Toolkit kit=Toolkit.getDefaultToolkit();
            Dimension d=kit.getScreenSize();
            setBounds(d.width/4,d.height/4,d.width/2,d.height/2);
            add(komponent=new MojKomponent());
            //panel na dole
             JPanel panel=new JPanel(new BorderLayout());
             add(panel,BorderLayout.SOUTH);
             //numer
             final JLabel label=new JLabel(getDesc());
             d=label.getPreferredSize();
             d.width*=1.5;
             panel.add(label,BorderLayout.EAST);
             //suwak
             final JSlider slider=new JSlider(1,20,n);
             slider.addChangeListener(new ChangeListener() {

                @Override
                public void stateChanged(ChangeEvent e) {
                    n=slider.getValue();
                    label.setText(getDesc());
                    komponent.repaint();

                }
            });
            panel.add(slider);

            //Menu
            JMenuBar mb= new JMenuBar();
             JMenu m = new JMenu("Plik");
             JMenuItem mi = new JMenuItem("Zamknij");
              mi.addActionListener(new ActionListener() {

                @Override
                public void actionPerformed(ActionEvent e) {
                    System.exit(0);

                }
            });
          m.add(mi);
          mb.add(m);
          m = new JMenu("Kolor");
            mi = new JMenuItem("Czerwony");
            mi.addActionListener(new ActionListener() {

                @Override
                public void actionPerformed(ActionEvent e) {
                    rr=255;
                    gg=0;
                    bb=0;
                    komponent.repaint();

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

                @Override
                public void actionPerformed(ActionEvent e) {
                    rr=0;
                    gg=255;
                    bb=0;
                    komponent.repaint();

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

                    @Override
                    public void actionPerformed(ActionEvent e) {
                        rr=0;
                        gg=0;
                        bb=255;
                        komponent.repaint();

                    }
                });
                m.add(mi);

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

                    @Override
                    public void actionPerformed(ActionEvent e) {
                        rr=0;
                        gg=0;
                        bb=0;
                        komponent.repaint();

                    }
                });
                m.add(mi);
                m.add(mi);
            setJMenuBar(mb);
            setVisible(true);
    }

    private String getDesc() {

        return "n="+n;
    }

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

            @Override
            public void run() {
                new something3("okno ");

            }
        });

    }

}