import java.awt.*;
import java.lang.Thread;
import java.util.Vector;
import java.net.URL;
import java.net.MalformedURLException;



public class banner extends java.applet.Applet implements Runnable{


	final String defaultURL = "http://www.new-mediacom.com";
	String headline;
	Vector headlines = new Vector();
	Vector urls      = new Vector();
	int curHeadline =0;
	int stringPos =0;
	Thread runner;
	int textLevel;
	Image logo;
	Image offscreenImage;
	Graphics offscreenGraphics;
	Color textColor = Color.red;
	boolean myCursor = false;

	

	public void init()
	{ 
	  setBackground(Color.black);

	  //set up double buffering
	  offscreenImage    = createImage(size().width,size().height);
	  offscreenGraphics =  offscreenImage.getGraphics();

	  // get the sky logo
	  logo = getImage(getCodeBase(),"sky.gif");
	  if (logo==null){ System.out.println("can't get image");}
	  
	  
	  //  get all the Headline and URL pairs. 
          //  can accept a variable number of parameters
	  String h;
	  for(int i = 1; true; i++)
	  { 
  	    // get the headline and add it to the Vector headlines
            h = getParameter(Integer.toString(i));
	    if(h == null) break;
            headlines.addElement(h);   

	    // get the corresponding url and add it to the Vector urls	    
	    h = getParameter(Integer.toString(i)+"url");
            if(h == null) h=defaultURL;	// if there is no corresponding URL set it to the default
            urls.addElement(h);   
	   }
	}


	
	// boilerplate thread initialisation stuff
	public void start()
	{
	  if (runner == null){
	    runner = new Thread(this);
	    runner.start();}
	}


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







	// what we do whilst actually running
	public void run()
	{
	  while (true)
	  {
		// keep looping through all the headlines
		if (curHeadline >= headlines.size()){curHeadline=0;}
		
		// initialise some global variables
		textLevel=35; // what level the text will start at
		stringPos=0; // what position we are along the string
		headline = headlines.elementAt(curHeadline).toString(); // get the current headline
		
		for (stringPos=1;stringPos<=headline.length();stringPos++)
		{ 
			// make the cursor blink
			if (myCursor)
			  myCursor=false;
			else
			  myCursor=true;

			// draw the current headline segment then sleep
			repaint();
			try {Thread.sleep(150);}
			catch (InterruptedException e){}
		}
		
		// let it stay for a bit on screen
		try {Thread.sleep(1000);}
		catch (InterruptedException e){}
		


		for (int a=1;a<35;a+=4)
		{
			// scroll it up 
			stringPos = headline.length();
			textLevel = 36-a;
			repaint();
			try {Thread.sleep(150);}
			catch (InterruptedException e){}
		}
		curHeadline++;	// get next headline		
	  }
	}

	

	public boolean handleEvent(Event evt)
	{

		// when mouse button is pressed jump the browser to this URL
		URL theURL;
		if (evt.id==Event.MOUSE_DOWN)
		{
		  try { theURL = new URL(urls.elementAt(curHeadline).toString()); getAppletContext().showDocument(theURL);}
		  catch ( MalformedURLException e) {}
		  
		}
		if (evt.id==Event.MOUSE_MOVE)
		{
			showStatus(headlines.elementAt(curHeadline).toString()+" : "+urls.elementAt(curHeadline).toString());
			textColor=Color.blue;
		}
		if (evt.id==Event.MOUSE_EXIT)
		{
			showStatus("");
			textColor=Color.red;
		}

		return true;
	}

	
	public void paint(Graphics g) 
	{
		
		// clear the screen
		offscreenGraphics.setColor(Color.black);
		offscreenGraphics.fillRect(0,0,size().width,size().height);

		// draw the sky logo
		if (logo != null){offscreenGraphics.drawImage(logo, 5, 10, this);}

		// draw the headline segment
		Font f = new Font("Arial,",Font.PLAIN, 15);
		offscreenGraphics.setFont(f);
		offscreenGraphics.setColor(textColor);
		offscreenGraphics.drawString(headline.substring(0,stringPos)+" |",115,textLevel);

		//draw on 'real' screen
		g.drawImage(offscreenImage,0,0,this);
           
	}


	public void update (Graphics g)
	{
		paint(g);
	}
	
}