/*
 *  File:  ListTest.java
 *
 *  Create a scrolling list that allows only one item to be selected.
 *    Uses ItemEvents when an item is selected with a "single click".
 *    Uses ActionEvents when an item is selected with a "double click".
 *  Also demonstrates the Toolkit class to get Font information from
 *    the browser.
 *
 *  Copyright:  Northeast Parallel Architectures Center
 *  
 */

import java.awt.List;
import java.awt.Label;
import java.awt.Color;
import java.awt.Toolkit;
import java.awt.Font;
import java.awt.event.ItemListener;
import java.awt.event.ActionListener;
import java.awt.event.ItemEvent;
import java.awt.event.ActionEvent;

public class ListTest extends java.applet.Applet
                      implements ItemListener, ActionListener {

  // Allow five visible items in the list, but 
  // disallow multiple selections:
  private List fontList = new List( 5, false );
  
  private String fontString;
  private Label fontLabel;
  private Font f = new Font ("Dialog", Font.PLAIN, 18);

  public void init() {
    setBackground( Color.white );
    setFont (f);

    // Color the scrolling list:
    Color lightBlue = new Color( 0xB0, 0xE0, 0xE6 );
    Color  navyBlue = new Color( 0x19, 0x19, 0x70 );
    fontList.setBackground( lightBlue );
    fontList.setForeground(  navyBlue );
    
    // Get list of system fonts:
    Toolkit toolkit = Toolkit.getDefaultToolkit();
    String fonts[] = toolkit.getFontList();
      
    // Add fonts to the scrolling list:
    for ( int i = 0; i < fonts.length; i++ ) {
      fontList.addItem( fonts[i] );
    }
    
    // Construct a text label:
    fontString  = "           Once in a galaxy ";
    fontString += "far, far away!             ";
    fontLabel = new Label( fontString, Label.CENTER );
    
    add( fontList );
    add( fontLabel );
    
    // Determine default font:
    String defaultFontName = fontLabel.getFont().getName();
    
    // Select default font in scrolling list:
    for ( int i = 0; i < fonts.length; i++ ) {
      if ( defaultFontName.equals( fonts[i] ) ) {
        fontList.select(i); break;
      }
    }
    
    // Register the applet to listen for events:
    fontList.addItemListener( this );
    fontList.addActionListener( this );
  }
  
  public void itemStateChanged( ItemEvent event ) {
    String fontName = fontList.getSelectedItem();
    int style = Font.PLAIN;
    int size = fontLabel.getFont().getSize();
    fontLabel.setFont( new Font( fontName, style, size ) );
    fontLabel.setText( fontString );
    showStatus( "" );
  }
  
  public void actionPerformed( ActionEvent event ) {
    String fontName = fontList.getSelectedItem();
    int style = Font.BOLD;
    int size = fontLabel.getFont().getSize();
    fontLabel.setFont( new Font( fontName, style, size ) );
    fontLabel.setText( fontString );
    showStatus( "You chose " + fontName + "!" );
  }
  
}