//package screensaver;

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
//import asteroids.*;

public class LinuxScreen extends JFrame
{
	
	java.util.Timer t=new java.util.Timer();
	
	public LinuxScreen(GraphicsConfiguration gc)
	{
		super(gc);
		setUndecorated(true);
		setDefaultCloseOperation(EXIT_ON_CLOSE);
		setResizable(false);
		
		setLayout(new GridLayout(5,5,2,2));		
		getContentPane().addMouseListener(new MouseAdapter(){
			@Override public void mouseClicked(MouseEvent me)
			{System.exit(0);}
		});
		//getContentPane().setCursor(FontTools.getInvisibleCursor());	
		
		for(int i=0;i<25;i++)
		{
			JPanel temp=new FadePanel();
			add(temp);
			t.schedule(new RepaintTask(temp),0,Math.round(Math.random()*30)+20);
		}
		
		setSize(gc.getBounds().getSize());
		setLocationRelativeTo(null);
		validateTree();
	}
	
	public class RepaintTask extends TimerTask
	{
		int dc=(int)(Math.round(Math.random())*2)-1;
		int clr=(int)Math.round((Math.random()*64))+128-32;
		
		JComponent jc;
		public RepaintTask(JComponent toRepaint)
		{jc=toRepaint;}
		
		@Override public void run()
		{
			jc.setBackground(new Color(clr,clr,clr));
			jc.repaint();
			if(clr==128-32)dc=1;
			if(clr==128+32)dc=-1;
			clr+=dc;
		}
	}
	
	public class FadePanel extends JPanel
	{
		@Override protected void paintComponent(Graphics g)
		{
			super.paintComponent(g);
		}
	}
	
	public static void main(String[] args)
	{
		GraphicsEnvironment ge=GraphicsEnvironment.getLocalGraphicsEnvironment();
		GraphicsDevice gd=ge.getDefaultScreenDevice();
		if(!gd.isFullScreenSupported()) System.exit(0);
		LinuxScreen instance=new LinuxScreen(gd.getDefaultConfiguration());
		gd.setFullScreenWindow(instance);
		instance.setVisible(true);
	}
}