/**
    * This file Copyright (c) 2013-2018 Magnolia International
    * Ltd.  (http://www.magnolia-cms.com). All rights reserved.
    *
    *
    * This file is dual-licensed under both the Magnolia
    * Network Agreement and the GNU General Public License.
    * You may elect to use one or the other of these licenses.
    *
   * This file is distributed in the hope that it will be
   * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
   * implied warranty of MERCHANTABILITY or FITNESS FOR A
   * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
   * Redistribution, except as permitted by whichever of the GPL
   * or MNA you select, is prohibited.
   *
   * 1. For the GPL license (GPL), you can redistribute and/or
   * modify this file under the terms of the GNU General
   * Public License, Version 3, as published by the Free Software
   * Foundation.  You should have received a copy of the GNU
   * General Public License, Version 3 along with this program;
   * if not, write to the Free Software Foundation, Inc., 51
   * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   *
   * 2. For the Magnolia Network Agreement (MNA), this file
   * and the accompanying materials are made available under the
   * terms of the MNA which accompanies this distribution, and
   * is available at http://www.magnolia-cms.com/mna.html
   *
   * Any modifications to this file must keep this entire header
   * intact.
   *
   */
  package info.magnolia.ui.admincentral.shellapp.favorites;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import com.vaadin.event.dd.DragAndDropEvent;
  import com.vaadin.event.dd.DropHandler;
  import com.vaadin.event.dd.acceptcriteria.AcceptCriterion;
  import com.vaadin.event.dd.acceptcriteria.And;
  import com.vaadin.event.dd.acceptcriteria.TargetDetailIs;
  import com.vaadin.shared.ui.dd.HorizontalDropLocation;
  import com.vaadin.shared.ui.dd.VerticalDropLocation;
  import com.vaadin.ui.Component;
  
  /**
   * Drag & drop wrapper for the {@link FavoritesGroup}.
   */
  public class GroupDragAndDropWrapper extends AbstractFavoritesDragAndDropWrapper {
  
      private final Logger log = LoggerFactory.getLogger(GroupDragAndDropWrapper.class);
  
      private final FavoritesGroup group;
  
      public GroupDragAndDropWrapper(Component root, FavoritesView.Listener listener, FavoritesGroup group) {
          super(root, listener);
          this.group = group;
      }
  
      @Override
      public Component getWrappedComponent() {
          return this.group;
      }
  
      @Override
      protected void init() {
          setDragStartMode(DragStartMode.WRAPPER);
          setSizeUndefined();
  
          setDropHandler(new DropHandler() {
  
              @Override
              public void drop(DragAndDropEvent event) {
                  AbstractFavoritesDragAndDropWrapperncentral/shellapp/favorites/AbstractFavoritesDragAndDropWrapper.html#AbstractFavoritesDragAndDropWrapper">AbstractFavoritesDragAndDropWrapper droppedComponent = (AbstractFavoritesDragAndDropWrapper) event.getTransferable().getSourceComponent();
                  if (droppedComponent.getWrappedComponent() instanceof FavoritesEntry) {
                      String favoritePath = ((FavoritesEntry) ((EntryDragAndDropWrapper) event.getTransferable().getSourceComponent()).getWrappedComponent()).getRelPath();
                      getListener().moveFavorite(favoritePath, group.getRelPath());
                  } else if (droppedComponent.getWrappedComponent() instanceof FavoritesGroup) {
  
                      String groupToMove = ((FavoritesGroup) droppedComponent.getWrappedComponent()).getRelPath();
                      WrapperTransferable transferable = (WrapperTransferable) event.getTransferable();
                      WrapperTargetDetails details = (WrapperTargetDetails) event.getTargetDetails();
                      String verticalDropLocation = (String) details.getData("verticalLocation");
  
                      boolean isDragDown = (details.getMouseEvent().getClientY() - transferable.getMouseDownEvent().getClientY()) > 0;
  
                      if (isDragDown && (verticalDropLocation.equals(VerticalDropLocation.BOTTOM.name()) || verticalDropLocation.equals(VerticalDropLocation.MIDDLE.name()))) {
                          getListener().orderGroupAfter(groupToMove, group.getRelPath());
                      } else if (!isDragDown && (verticalDropLocation.equals(VerticalDropLocation.TOP.name()) || verticalDropLocation.equals(VerticalDropLocation.MIDDLE.name()))) {
                          getListener().orderGroupBefore(groupToMove, group.getRelPath());
                      }
  
                  } else {
                      log.warn("Trying to drop neither entry nor group on a group.");
                  }
  
              }
 
             @Override
             public AcceptCriterion getAcceptCriterion() {
                 return new And(
                         new TargetDetailIs("verticalLocation", VerticalDropLocation.MIDDLE.name()),
                         new TargetDetailIs("horizontalLocation", HorizontalDropLocation.CENTER.name()));
             }
         });
 
     }
 }