import java.awt.*;
import java.applet.Applet;
import java.awt.Graphics;

class Item
{
	String s;
    int tickerx;
    int tickery;
    int tickerlen;
    int	middle;
    
    int width;
    int height;
    int hoscil;
    int hoscilmax;
    int mode = 0;
    
    double cmpt;	// counter for graphics animations
    double yinit;
    int	   xinit;
    double a;
    double tmax = 10;
    int	   turn = 0;
    double phase = 100;
    
    Color  tickercolor;
    Font   tickerfont;
	
	Item( String s0, Font font0, int len, int middle0, int W, int H, int initx0, int inity0)
	{
		tickerx		= initx0;
		xinit		= initx0;
		tickerfont 	= font0;
		tickerlen  	= len;
		s 		   	= s0;
		
		cmpt		= initx0;
		yinit		= inity0;		
		width		= W;
		height		= H;
		hoscilmax	= H-middle0;
		hoscil		= 0;
		middle		= middle0;
		
		//cmpt		= 0;
		
		tickercolor = new Color( 255-xinit/2, xinit/2, xinit/2);
	}
				
	void compute(int speed)
	{
		// x loop
		tickerx -= speed; //((speed * (curtick - lasttick)) / 1000);
		if (tickerx > width || tickerx + tickerlen < 0) 
			{ 
				turn++;
				int nr, nb;
				if (turn < 10)
				{
					nr = (tickercolor.getRed() - 20); if (nr < 0) nr = 0;
					nb = (tickercolor.getBlue() + 17);if (nb > 255) nb = 255;
				}
				else
				{
					nr = (tickercolor.getRed() + 20);if (nr > 255) nr = 255;
					nb = (tickercolor.getBlue() - 17); if (nb < 0) nb = 0;
				}
				
				tickercolor = new Color( nr, tickercolor.getGreen(),  nb);
			  	tickerx = width; 
			  	hoscil += height/20; if (hoscil > hoscilmax) hoscil = hoscilmax;
			  	if (phase != 50)
			  		if (hoscil == hoscilmax) { cmpt = (cmpt*(phase-10))/phase; phase -= 10; }
			  	
			  	if (phase == 50) mode++; 
			  	if ((mode == 2) || (mode == 1)) { cmpt = 0; yinit = tickery; a = tmax*tmax/yinit; }
			  	if (mode >=3) { cmpt=xinit; } 
			  	if (turn > 20) { turn = 0; mode = 0; phase = 100; hoscil = 0; tmax = 10; tickercolor = new Color( 255-xinit/2, xinit/2, xinit/2); }
			  }

		// y loop
		if (mode == 0)
		{
			cmpt-=speed;
			tickery = (int)(Math.sin(cmpt/phase)*hoscil + middle);
		}
		if ((mode == 1) || (mode == 2))
		{
			cmpt+=0.5;
			if (cmpt > tmax)
			{
				cmpt -= tmax; //time remaining;
				//rebound*=2;
				yinit = (2*yinit)/3;
				tmax  = Math.sqrt(yinit*a);
				cmpt  = -tmax + cmpt; // time initialisation
			}	
			tickery = height - (int)(yinit - cmpt*cmpt/a);
		}
		if (mode >= 3)
		{
			cmpt++;
			tickery = (int)((Math.cos(cmpt/10) + Math.sin(cmpt/14)) * hoscilmax/2 + middle);
		}
	}

}

public class ScrollApplet2 extends Applet implements Runnable
{


    int    speed;		// In pixels per second for scrolling
	int    nbItems;

	long 	lasttick;
	Thread 	runner;
	Item	[] tabItem;

	int W;
	int H;
	Image offscreenImage;
	Graphics offscreenGraphics;

	public void init()
	{
		initialise("Helvetica", "SpikeNET");
		offscreenImage = createImage(size().width, size().height);
		offscreenGraphics = offscreenImage.getGraphics();
	}

	public void update(Graphics g)
	{ paint(g); }
	
	public void destroy()
	{
		offscreenGraphics.dispose();
	}

    void initialise( String f,  String s)
    {
	    Font   tickerfont;

		speed = 4;
		String fontname = f;

		W = size().width;
		H = size().height;
		
		// adjust to the right font size
		FontMetrics fm;
		int size;
		int nextsize = H/3;
		do
		{
	    	size = nextsize;
	    	tickerfont = new Font(fontname, Font.PLAIN, size);
	    	
	    	fm = getFontMetrics(tickerfont);
	    	nextsize = (size * 9) / 10;
		} while (fm.getHeight() > H && size > 0);
		
		// reserv memory for items
		nbItems = s.length();
		tabItem = new Item[ nbItems ];
		int offsetletter = 0;
		int maxlen = 40;
		int middle = (H + fm.getAscent())/2;
		
		for (int i=0; i < nbItems; i++)
		{
			StringBuffer stmp = new StringBuffer();
			stmp.append(s.charAt(i));
			tabItem[i] = new Item( stmp.toString(), tickerfont, maxlen, middle, W, H, offsetletter, (H-fm.getAscent())-10*i); // (int)((H-fm.getAscent())/(Math.random()*3+1)));
			offsetletter += fm.stringWidth(stmp.toString());
		}
		
		lasttick = System.currentTimeMillis();
    }

/*    public void getMedia() 
    {
		tickerx = 0;
		repaint();
		lasttick = System.currentTimeMillis();
    }*/

    public void run() 
    {
     	while(true)
     	{
     		try 
     		{
 				//long curtick = System.currentTimeMillis();
				//tickerx -= speed; //((speed * (curtick - lasttick)) / 1000);
				//if (tickerx > W || tickerx + tickerlen < 0) { tickerx = W; }
				for (int i=0; i<nbItems; i++)
					tabItem[i].compute(speed);
	
				repaint();
				//lasttick = curtick;
				Thread.sleep(25);
			}
    		catch (InterruptedException e) {}
    	}
    }

	public void start()
	{
		if (runner == null)
		{
			runner = new Thread(this);
			runner.start();
		}
	}

	public void stop()
	{
		if (runner != null) { runner.stop(); runner = null; }
	}	
	

    public void paint(Graphics g) 
    {
		/*for (int i=0; i< W/2; i++)
		{
			offscreenGraphics.setColor(new Color(255 - i/3, 0, 0));
			offscreenGraphics.drawLine(i,0,i, H);
		}
		for (int i=W/2; i< W; i++)
		{
			offscreenGraphics.setColor(new Color(255 - (W-i)/3, 0, 0));
			offscreenGraphics.drawLine(i,0,i, H);
		}*/
		offscreenGraphics.setColor(Color.black);
		offscreenGraphics.fillRect(0, 0, size().width, size().height);
		//offscreenGraphics.setColor(Color.lightGray);				
		for (int i=0; i<nbItems; i++)
		{
			offscreenGraphics.setColor(tabItem[i].tickercolor);
			offscreenGraphics.setFont(tabItem[i].tickerfont);
			offscreenGraphics.drawString(tabItem[i].s, tabItem[i].tickerx, tabItem[i].tickery);
		}
 		g.drawImage(offscreenImage, 0, 0, this);
   }

}