import java.awt.*;
import java.applet.*;
import java.net.*;
import java.lang.*;
import java.awt.image.*;

public class button extends Applet {
	int 	x=0,y=0,StrPosX,StrPosY,picw=200,pich=30;
	Color White;
	Font MyFont=new Font("Helvetica",Font.BOLD,(pich/2));
	Image img,shadowedImg;
	FontMetrics Fo;
	String ButtonText,Width,Height,Link=null;
	URL url;
	boolean mouseIn=false;
	boolean isLink=false;

	public void init() {
		
  		White = new Color(255,255,255);
		setBackground(White);
		ButtonText = getParameter("text");
		Width = getParameter("width");
		Height = getParameter ("height");
		Link = getParameter ("link");
		if (Link!=null)
			isLink=true;
		try {
			url = new URL(Link);
		}
		catch (Exception MalformedURLException) {
			;
		}		

		picw = java.lang.Integer.parseInt(Width);
		pich = java.lang.Integer.parseInt(Height);
		int  pix[]  =  new  int[picw  *  pich];
		int  index  =  0;
		int red=0;
		int blue;
		int green;
		int border=5;
		int row=0;
		int column=0;
		int lowShadowStart=pich-border;
		int rightShadowStart=picw-border;

		for  (int  y  =  0;  y <  pich;  y++)  {
			int Offset = (int)Math.sqrt( ((picw)*(picw)) + ((y-pich)*(y-pich)) );
			for  (int  x  =  0;  x  <  picw;  x++)  {
				blue  = 255 - (int)((Offset-x)*(155/(float)picw));
				green = 200  - (int)((Offset-x) * (200/(float)picw));
				
				row=index/picw;
				column=index%picw;

				//upper shadow
				
				if (isLink) {

					if ( (row<border) && (column>row) && (column<(picw-row)) ) {
	       				green-=40;
				  		blue-=40;
					}
					//lower shadow
					else if ( (row>=(lowShadowStart)) && 
						  (column>(border-(row%lowShadowStart))) && 
						  (column<(picw-(pich%row)))  ) {
       					  green+=60;
					  blue+=60;
					}
					else if ( column>=rightShadowStart ) { //right shadow
       					  green+=20;
					  blue+=20;
					}
					else if ( column<border ) { // left shadow
       					  green-=10;
					  blue-=10;
					}
				}
				

                		// To correct for area not within circle & the overflow of 3d
				if (blue<0) blue=100;
				if (green<0) green=0;
				if (blue>255) blue=255;
				if (green>255) green=255;

				pix[index++]  =  (255<<24) |	(red<<16) |	(green<<8) | blue;
			}
		}
		img  =  createImage(new  MemoryImageSource(picw,  pich,  pix,  0,  picw));

		ImageFilter shadower = new DarkFilter();
		
		shadowedImg = createImage(new FilteredImageSource(img.getSource(),shadower));
	
	}
	
	public void showNewPage (URL u) {
		getAppletContext().showDocument(u);
	}
		
	public void paint(Graphics g) {
		Fo = g.getFontMetrics(MyFont);
		StrPosX = (picw - Fo.stringWidth(ButtonText))/2;
		StrPosY = pich/2 + Fo.getAscent()/2;
		if (mouseIn) 
			g.drawImage(shadowedImg,x,y,picw,pich,this);
		else {
			g.drawImage(img,x,y,picw,pich,this);
		}
		g.setFont(MyFont);
		g.setColor(White);
		g.drawString(ButtonText,StrPosX,StrPosY);
	}

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

	public boolean mouseUp(Event e, int posx, int posy) {

		showNewPage(url);
		return false;
	}

	public boolean mouseEnter(Event e, int posx, int posy) {

		if (isLink) {
			mouseIn=true;
			repaint();
		}
		getAppletContext().showStatus(Link);
		return false;
	
	}


	public boolean mouseMove(Event e, int posx, int posy) {
		getAppletContext().showStatus(Link);
		return false;

  	}

	public boolean mouseExit(Event e, int posx, int posy) {
		mouseIn=false;
			if (isLink) {
				repaint();
			}
		return false;
	}

	public void stop() {
		destroy();
	}
	
	public void start() {
		init();
		for(int k=0;k<20;k++)
			System.out.println("At " + k + " netscape's bug!");
		repaint();
	}

}