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.gwt.client.ui;
  
  import com.google.gwt.event.dom.client.MouseOutEvent;
  import com.google.gwt.event.dom.client.MouseOutHandler;
  import com.google.gwt.event.dom.client.MouseOverEvent;
  import com.google.gwt.event.dom.client.MouseOverHandler;
  import com.google.gwt.user.client.Timer;
  
  /**
   * On hover intent handler.<p>
   *
   * @since 8.0.0
   */
  public abstract class A_CmsHoverHandler implements MouseOutHandler, MouseOverHandler {
  
      /** Timer to achieve the hover intent effect. */
      protected Timer m_timer;
  
      /**
       * @see com.google.gwt.event.dom.client.MouseOutHandler#onMouseOut(com.google.gwt.event.dom.client.MouseOutEvent)
       */
      public final void onMouseOut(MouseOutEvent event) {
  
          if (m_timer != null) {
              m_timer.cancel();
              m_timer = null;
          } else {
              onHoverOut(event);
          }
      }
  
      /**
       * @see com.google.gwt.event.dom.client.MouseOverHandler#onMouseOver(com.google.gwt.event.dom.client.MouseOverEvent)
       */
      public final void onMouseOver(final MouseOverEvent event) {
  
          if (m_timer != null) {
              return;
          }
          m_timer = new Timer() {
  
              /**
               * @see com.google.gwt.user.client.Timer#run()
               */
              @Override
              public void run() {
  
                  m_timer = null;
                  onHoverIn(event);
              }
          };
          m_timer.schedule(100);
      }
  
      /**
       * Will be executed for starting the hover effect.<p>
       *
       * @param event the mouse event
       */
      protected abstract void onHoverIn(MouseOverEvent event);
  
      /**
       * Will be executed for finishing the hover effect.<p>
       *
       * @param event the mouse event
       */
      protected abstract void onHoverOut(MouseOutEvent event);
  }
  