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.tree;
  
  import com.google.gwt.event.logical.shared.OpenEvent;
  
  /**
   * Two levels deep lazy list tree open handler abstract implementation.<p>
   *
   * @param <I> the specific lazy tree item implementation
   *
   * @since 8.0.0
   *
   * @see org.opencms.gwt.client.ui.tree.CmsLazyTree
   * @see org.opencms.gwt.client.ui.tree.CmsLazyTreeItem
   * @see org.opencms.gwt.client.ui.tree.I_CmsLazyOpenHandler
   */
  public abstract class A_CmsDeepLazyOpenHandler<I extends CmsLazyTreeItem> extends A_CmsLazyOpenHandler<I> {
  
      /**
       * @see org.opencms.gwt.client.ui.tree.I_CmsLazyOpenHandler#onOpen(com.google.gwt.event.logical.shared.OpenEvent)
       */
      @Override
      @SuppressWarnings("unchecked")
      public void onOpen(OpenEvent<I> event) {
  
          I target = event.getTarget();
          if (target.getLoadState() == CmsLazyTreeItem.LoadState.UNLOADED) {
              // in case the first level is not yet loaded
              super.onOpen(event);
          } else if (target.getChildCount() > 0) {
              // load second level
              int c = target.getChildCount();
              for (int i = 0; i < c; i++) {
                  I child = (I)target.getChild(i);
                  if (child.getLoadState() != CmsLazyTreeItem.LoadState.UNLOADED) {
                      continue;
                  }
                  child.onStartLoading();
                  child.setOpen(false);
                  load(child, null);
              }
          }
      }
  }
  