/*

     dsh-identify  Lightweight components for identifiable beans.

     Copyright (c) 2003-2019 held jointly by the individual authors.

     This library is free software; you can redistribute it and/or modify it

     under the terms of the GNU Lesser General Public License as published

     by the Free Software Foundation; either version 3 of the License, or (at

     your option) any later version.

     This library is distributed in the hope that it will be useful, but WITHOUT

     ANY WARRANTY; with out even the implied warranty of MERCHANTABILITY or

     FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public

     License for more details.

     You should have received a copy of the GNU Lesser General Public License

     along with this library;  if not, write to the Free Software Foundation,

     Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA.

     > http://www.fsf.org/licensing/licenses/lgpl.html

     > http://www.opensource.org/licenses/lgpl-license.php

 */

 package org.dishevelled.identify;

 import java.awt.event.MouseAdapter;

 import java.awt.event.MouseEvent;

 import java.awt.event.MouseListener;

 import javax.swing.ImageIcon;

 import javax.swing.JButton;

 import javax.swing.JPopupMenu;

 /**

  * Context menu button.

  *

  * @author  Michael Heuer

  */

 public final class ContextMenuButton

     extends JButton

 {

     /** Context menu. */

     private final JPopupMenu contextMenu;

     /** Mouse listener. */

     private final MouseListener listener = new MouseAdapter()

         {

             @Override

             public void mousePressed(final MouseEvent event)

             {

                 contextMenu.show(event.getComponent(), 0, event.getComponent().getHeight());

             }

         };

     /** Default image icon. */

     private static final ImageIcon DEFAULT_ICON = new ImageIcon(ContextMenuButton.class.getResource("context-menu.png"));

     /** GTK look and feel image icon. */

     private static final ImageIcon GTK_ICON = new ImageIcon(ContextMenuButton.class.getResource("context-menu-gtk.png"));

     /**

      * Create a new context menu button with the specified context menu.

      *

      * @param contextMenu context menu, must not be null

      */

     public ContextMenuButton(final JPopupMenu contextMenu)

     {

         super();

         if (contextMenu == null)

         {

             throw new IllegalArgumentException("contextMenu must not be null");

         }

         this.contextMenu = contextMenu;

         setIcon(IdentifyUtils.isGTKLookAndFeel() ? GTK_ICON : DEFAULT_ICON);

         setToolTipText("View menu");

         addMouseListener(listener);

     }

     /**

      * Release the resources consumed by this context menu button so that it may eventually be garbage collected.

      */

     public void dispose()

     {

         removeMouseListener(listener);

     }

 }