content: /*
   * This library is part of OpenCms -
   * the Open Source Content Management System
   *
   * Copyright (c) Alkacon Software GmbH & Co. KG (https://www.alkacon.com)
   *
   * 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 2.1 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; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
   * Lesser General Public License for more details.
   *
   * For further information about Alkacon Software, please see the
   * company website: https://www.alkacon.com
   *
   * For further information about OpenCms, please see the
   * project website: https://www.opencms.org
   *
   * 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
   */
  
  package org.opencms.ui.components;
  
  import com.vaadin.event.Action;
  import com.vaadin.event.Action.Handler;
  import com.vaadin.event.ShortcutAction;
  
  /**
   * Shortcut handler triggered on 'Enter' and 'Esc' to trigger OK and Cancel actions.<p>
   */
  public abstract class CmsOkCancelActionHandler implements Handler {
  
      /** The serial version id. */
      private static final long serialVersionUID = 6114433920380720290L;
  
      /** The enter action. */
      protected static final ShortcutAction ENTER_ACTION = new ShortcutAction(
          "Enter",
          ShortcutAction.KeyCode.ENTER,
          null);
  
      /** The escape action. */
      protected static final ShortcutAction ESC_ACTION = new ShortcutAction(
          "Escape",
          ShortcutAction.KeyCode.ESCAPE,
          null);
  
      /** The shortcut actions. */
      private static final ShortcutAction[] SHORTCUT_ACTIONS = new ShortcutAction[] {ENTER_ACTION, ESC_ACTION};
  
      /**
       * @see com.vaadin.event.Action.Handler#getActions(java.lang.Object, java.lang.Object)
       */
      public Action[] getActions(Object target, Object sender) {
  
          return SHORTCUT_ACTIONS;
      }
  
      /**
       * @see com.vaadin.event.Action.Handler#handleAction(com.vaadin.event.Action, java.lang.Object, java.lang.Object)
       */
      public void handleAction(Action action, Object sender, Object target) {
  
          if (ENTER_ACTION.equals(action)) {
              ok();
          } else if (ESC_ACTION.equals(action)) {
              cancel();
          }
      }
  
      /**
       * Called on key press 'Esc'.<p>
       */
      protected abstract void cancel();
  
      /**
       * Called on key press 'Enter'.<p>
       */
      protected abstract void ok();
  
  }
  