//AlphaImage.java
//Illustrates images in alphabet game
//Andy Harris, 05/00

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

public class AlphaImage extends Applet implements ActionListener {

  Image imgA;
  Image imgB;
  Image imgC;
  Image imgD;
  Image imgE;
  Image imgF;
  
  Button btnA = new Button("A");
  Button btnB = new Button("B");
  Button btnC = new Button("C");
  Button btnD = new Button("D");
  Button btnE = new Button("E");
  Button btnF = new Button("F");

  Canvas drawSurface = new Canvas();
  

  public void init(){

    setLayout(new BorderLayout());
    add(drawSurface, BorderLayout.CENTER);

    Panel pnlSouth = new Panel();
    pnlSouth.add(btnA);
    pnlSouth.add(btnB);
    pnlSouth.add(btnC);
    pnlSouth.add(btnD);
    pnlSouth.add(btnE);
    pnlSouth.add(btnF);

    add(pnlSouth, BorderLayout.SOUTH);

    imgA = this.getImage(this.getDocumentBase(), "A.jpg");
    imgB = this.getImage(this.getDocumentBase(), "B.jpg");
    imgC = this.getImage(this.getDocumentBase(), "C.jpg");
    imgD = this.getImage(this.getDocumentBase(), "D.jpg");
    imgE = this.getImage(this.getDocumentBase(), "E.jpg");
    imgF = this.getImage(this.getDocumentBase(), "F.jpg");

    //set up mediatracker
    MediaTracker tracker = new MediaTracker(this);
    tracker.addImage(imgA, 0);
    tracker.addImage(imgB, 1);
    tracker.addImage(imgC, 2);
    tracker.addImage(imgD, 3);
    tracker.addImage(imgE, 4);
    tracker.addImage(imgF, 5);
  
      
    try{
      tracker.waitForAll();
    } catch (InterruptedException exc){
      System.out.println(exc.getMessage());
    } // end try


    btnA.addActionListener(this);
    btnB.addActionListener(this);
    btnC.addActionListener(this);
    btnD.addActionListener(this);
    btnE.addActionListener(this);
    btnF.addActionListener(this);
    
  } // end init

  public void actionPerformed(ActionEvent e){

    Graphics g = drawSurface.getGraphics();
    Dimension size = drawSurface.getSize();
    int ht = size.height;
    int wd = size.width;

    Image currentImage;
    
    if (e.getSource() == btnA){
      currentImage = imgA;
    } else if (e.getSource() == btnB){
      currentImage = imgB;
    } else if (e.getSource() == btnC){
      currentImage = imgC;
    } else if (e.getSource() == btnD){
      currentImage = imgD;
    } else if (e.getSource() == btnE){
      currentImage = imgE;
    } else if (e.getSource() == btnF){
      currentImage = imgF;
    } else {
      currentImage = imgA;
    } // end if

    g.drawImage(currentImage, 0, 0, wd, ht, this);    
  } // end actionPerformed

  
} // end class def