/* 
   File: Download.java

   archiving, compressing, and downloading a server
   directory on-the-fly
*/

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

public class Download extends Applet 
                      implements ActionListener, ItemListener {

  private Label directoryLabel, formatLabel, fileLabel;
  private Choice directoryList, formatList;
  private Button downloadButton;
  
  public void init() {
    setBackground( Color.white );

    directoryLabel = new Label( "Directory:  ", Label.RIGHT );
    
    directoryList = new Choice();
    directoryList.addItem( "HTML"       );
    directoryList.addItem( "JavaScript" );
    directoryList.addItem( "CGI"        );
    directoryList.addItem( "Java"       );
    directoryList.addItem( "JDBC"       );
    directoryList.addItem( "VRML"       );
    // Select "JavaScript" as the default menu choice:
    directoryList.select(1);
    
    formatLabel = new Label( "   Format:  ", Label.RIGHT );
    
    formatList = new Choice();
    formatList.addItem( ".zip"    );
    formatList.addItem( ".tar.Z"  );
    formatList.addItem( ".tar.gz" );
    formatList.addItem( ".sit"    );
    // Select ".tar.gz" as the default menu choice:
    formatList.select(2);
    
    fileLabel = new Label();
    fileLabel.setAlignment( Label.LEFT );
    updateLabel();
    
    downloadButton = new Button( "Download" );
    
    int rows = 2, cols = 3;
    setLayout( new GridLayout( rows, cols ) );
    add( directoryLabel ); add( directoryList ); add( fileLabel );
    add( formatLabel ); add( formatList ); add( downloadButton );
    
    directoryList.addItemListener( this );
    formatList.addItemListener( this );
    downloadButton.addActionListener( this );
  }
  
  public void actionPerformed( ActionEvent event ) {
    showStatus( "Not yet implemented!" );
  }
  
  public void itemStateChanged( ItemEvent event ) {
    updateLabel();
  }
  
  public void updateLabel() {
    String s = directoryList.getSelectedItem();
    s += formatList.getSelectedItem();
    fileLabel.setText( "File:  " + s );
  }

}