//Purpose: This applet takes note of whenever
// key is hit and if it is visible it will
// change the key that is displayed.
// NOTE: there is additional code here that
// DOES NOT work for all Keyboards...see
// API on KeyEvent and how support for the following
// is not gauranteed and is keyboard-specific!!!!!!
// What this other code tries to do is to monitor
// when the UP, DOWN, LEFT or RIGHT arrow keys are
// hit and move the position of the displayed character
// UP or DOWN or to the LEFT or
// RIGHT from the starting location of the
// middle of the applet graphics window.
// It makes sure that it does not go off the
// screen!!!

import java.awt.*;
import java.applet.*;
import java.awt.event.*;
import java.awt.event.KeyListener;



public class test10 extends Applet implements KeyListener {


    char currkey ='x'; //current character used as movable data symbol
    int currX;  //current position of data symbol
    int currY;

    
    //Set background to yellow, 
    public void init() {
      setBackground(Color.yellow);
      currX = (int) (this.size().width / 2) - 8;
      currY = (int) (this.size().height / 2) - 16; 
      setFont(new Font("Helvetical", Font.BOLD, 36));
      addKeyListener(this);
    }

   
    //key hit
    public void keyPressed(KeyEvent e) {
      System.out.println("Key is hit");
      if(e.getKeyCode() == KeyEvent.VK_DOWN)
         currKey = 'R';
       switch (e.getKeyCode() ) {
        case KeyEvent.VK_KP_DOWN:   //THIS MAY NOT WORK ON ALL KEYBOARDS...SEE JAVA API!!!
            System.out.println("hi");
            currY += 5;  //move over 5 pixels
            if(currY >= this.size().height)
               currY = this.size().height - 1;
            break;
        case KeyEvent.VK_KP_UP:  //THIS MAY NOT WORK ON ALL KEYBOARDS...SEE JAVA API!!!
            currY -= 5;  //move over 5 pixels
             if(currY < 0)
               currY = 0;
            break;
        case KeyEvent.VK_KP_LEFT:  //THIS MAY NOT WORK ON ALL KEYBOARDS...SEE JAVA API!!!
            currX -= 5;  //move over 5 pixels
             if(currX < 0)
               currX = 0;
            break;
        case KeyEvent.VK_KP_RIGHT:  //THIS MAY NOT WORK ON ALL KEYBOARDS...SEE JAVA API!!!
            currX += 5;  //move over 5 pixels
            if(currX >= this.size().width)
               currX = this.size().width - 1;
            break;
        default:   //THIS WILL WORK ON ALL KEYBOARDS
            currkey = e.getKeyChar();  
       }
      repaint();
      return true;      
    }

    //Paint the current key at the current position
    public void paint(Graphics g) {
         //set drawing color
         g.setColor(Color.red);
      
         if( currkey != 0){
           g.drawString(String.valueOf(currkey), currX,currY);
         }   
    }

   //Set back to center of applet window
   public void start() {
         currX = (int) (this.size().width / 2) - 8;
         currY = (int) (this.size().height / 2) - 16; 
     }

 
   //Other methods need to implement KeyListener
   public  void keyReleased(KeyEvent e) {}
   public  void keyTyped(KeyEvent e) {}



}