package jsetool.gui;

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

/**
 * @author Mike Lawson
 *
 * @since November 12, 2004
 * 
 * The ApplicationFrame class is a Frame
 * that knows how to close itself.
 * 
 * 
 */
public class ApplicationFrame extends Frame {
  /**
   * Constructs a new application frame
   * 
   */
  public ApplicationFrame() { this(""); }
  
  /**
   * Constructs a new application frame with the given title.
   * @param title
   */
  public ApplicationFrame(String title) {
    super(title);
    
    createUI();
  }
  
  /**
   * Centers the frame on the display.
   *
   */
  public void center() {
    Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
    Dimension frameSize = getSize();
    int x = (screenSize.width - frameSize.width) / 2;
    int y = (screenSize.height - frameSize.height) / 2;
    setLocation(x, y);
  }
  
  /**
   * Creates the user interface and adds the window
   * listener to actually close the display when the frame
   * is closed.
   */
  protected void createUI() {
    setSize(500, 400);
    center();

    addWindowListener(new WindowAdapter() {
      public void windowClosing(WindowEvent e) {
        dispose();
        System.exit(0);
      }
    });
  }
  
  
}