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 cos2 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 szer=getWidth();
	          int wys=getHeight();
	          int x=getWidth()/2;
	          int y=getHeight()/2;
	          int ax=szer/4;
	          int bx=szer*3/4;
	          int ay=wys/4;
	          int by=wys*3/4;


	          g.drawLine(0,y,ax,ay);
	          g.drawLine(ax,ay,bx,ay);
	          g.drawLine(ax,by,bx,ay);
	          g.drawLine(ax,by,bx,by);
	          g.drawLine(szer,y,bx,by);

	         for(int i=0;i<=n;i++){

	        	 g.drawLine(0+szer*(i+1)/(n+1),ay,0+szer*(i+1)/(n+1),0);
	        	 g.drawLine(0+szer*(i+1)/(n+1),y-wys*(i+1)/(n+1),0+szer*(i+1)/(n+1),0);
	        	 if ((y+wys)-wys*(i+1)/(n+1)<=by) {
	        	 g.drawLine(0+szer*(i+1)/(n+1),(y+wys)-wys*(i+1)/(n+1),0+szer*(i+1)/(n+1),0);
	        	 }
	        	 if (0+szer*(i+1)/(n+1)<=bx && 0+szer*(i+1)/(n+1)>=ax) {
	        	 g.drawLine(0+szer*(i+1)/(n+1),by,0+szer*(i+1)/(n+1),wys-wys*(i+1)/(n+1));
	        	 }
	        	 g.drawLine((x+szer)-szer*(i+1)/(n+1),0+wys*(i+1)/(n+1),szer,0+wys*(i+1)/(n+1));
	        	 if(0+wys*(i+1)/(n+1)>=ay) {
	        	 g.drawLine( x-szer*(i+1)/(n+1),0+wys*(i+1)/(n+1),szer-szer*(i+1)/(n+1),0+wys*(i+1)/(n+1));
	        	 }
	        	 if(0+wys*(i+1)/(n+1)>=by) {
	        	 g.drawLine(0,0+wys*(i+1)/(n+1),szer,0+wys*(i+1)/(n+1));
	        	 }
	          }
			super.paintComponent(g);
		}

	   }

	public cos2(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 cos2("okno ");

			}
		});

	}

}