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   *   Licensed to the Apache Software Foundation (ASF) under one
   *  or more contributor license agreements.  See the NOTICE file
   *  distributed with this work for additional information
   *  regarding copyright ownership.  The ASF licenses this file
   *  to you under the Apache License, Version 2.0 (the
   *  "License"); you may not use this file except in compliance
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   *
   *    https://www.apache.org/licenses/LICENSE-2.0
   *
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   *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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  package org.apache.cayenne.swing.control;
  
  import java.awt.Color;
  import java.awt.event.ActionEvent;
  import java.awt.event.ActionListener;
  import java.awt.event.MouseAdapter;
  import java.awt.event.MouseEvent;
  
  import javax.swing.JLabel;
  
  /**
   * A label that works like an HTML hyperlink, generating ActionEvents on click.
   * 
   */
  public class ActionLink extends JLabel {
  
      static final Color LINK_FONT_COLOR = Color.BLUE;
      static final Color LINK_MOUSEOVER_FONT_COLOR = Color.RED;
  
      public ActionLink(String text) {
          super(text);
  
          // due to this bug (that is marked as fixed, but stil doesn't work on JDK
          // 1.4.2), we can't build underlined font:
          // http://bugs.sun.com/bugdatabase/view_bug.do;:YfiG?bug_id=4296952
  
          setForeground(LINK_FONT_COLOR);
          addMouseListener(new MouseAdapter() {
  
              public void mouseClicked(MouseEvent e) {
                  fireActionPerformed();
              }
  
              public void mouseEntered(MouseEvent e) {
                  setForeground(LINK_MOUSEOVER_FONT_COLOR);
              }
  
              public void mouseExited(MouseEvent e) {
                  setForeground(LINK_FONT_COLOR);
              }
          });
      }
  
      protected void fireActionPerformed() {
  
          Object[] listeners = listenerList.getListenerList();
          ActionEvent e = null;
  
          for (int i = listeners.length - 2; i >= 0; i -= 2) {
              if (listeners[i] == ActionListener.class) {
  
                  if (e == null) {
                      e = new ActionEvent(this, ActionEvent.ACTION_PERFORMED, null);
                  }
  
                  ((ActionListener) listeners[i + 1]).actionPerformed(e);
              }
          }
      }
  
      public void addActionListener(ActionListener l) {
          listenerList.add(ActionListener.class, l);
      }
  
      public void removeActionListener(ActionListener l) {
          listenerList.remove(ActionListener.class, l);
      }
  }
  