content: /*
   * This library is part of OpenCms -
   * the Open Source Content Management System
   *
   * Copyright (C) Alkacon Software (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.acacia.client.ui;
  
  import org.opencms.acacia.client.css.I_CmsLayoutBundle;
  import org.opencms.gwt.client.I_CmsHasResizeOnShow;
  import org.opencms.gwt.client.dnd.CmsDNDHandler.Orientation;
  import org.opencms.gwt.client.dnd.I_CmsDraggable;
  import org.opencms.gwt.client.dnd.I_CmsDropTarget;
  import org.opencms.gwt.client.ui.CmsHighlightingBorder;
  import org.opencms.gwt.client.util.CmsDomUtil;
  
  import com.google.gwt.dom.client.Element;
  import com.google.gwt.user.client.ui.FlowPanel;
  import com.google.gwt.user.client.ui.Widget;
  
  /**
   * The attribute values panel.<p>
   */
  public class CmsValuePanel extends FlowPanel implements I_CmsDropTarget, I_CmsHasResizeOnShow {
  
      /** The current place holder. */
      protected Element m_placeholder;
  
      /** The placeholder position index. */
      protected int m_placeholderIndex = -1;
  
      /** The highlighting border. */
      private CmsHighlightingBorder m_highlighting;
  
      /**
       * Constructor.<p>
       */
      public CmsValuePanel() {
  
          setStyleName(I_CmsLayoutBundle.INSTANCE.form().attribute());
      }
  
      /**
       * @see org.opencms.gwt.client.dnd.I_CmsDropTarget#checkPosition(int, int, org.opencms.gwt.client.dnd.CmsDNDHandler.Orientation)
       */
      public boolean checkPosition(int x, int y, Orientation orientation) {
  
          return true;
      }
  
      /**
       * @see org.opencms.gwt.client.dnd.I_CmsDropTarget#getPlaceholderIndex()
       */
      public int getPlaceholderIndex() {
  
          return m_placeholderIndex;
      }
  
      /**
       * Highlights the outline of this panel.<p>
       */
      public void highlightOutline() {
  
          m_highlighting = new CmsHighlightingBorder(getElement(), CmsHighlightingBorder.BorderColor.red);
          add(m_highlighting);
      }
  
      /**
       * @see org.opencms.gwt.client.dnd.I_CmsDropTarget#insertPlaceholder(com.google.gwt.dom.client.Element, int, int, org.opencms.gwt.client.dnd.CmsDNDHandler.Orientation)
       */
      public void insertPlaceholder(Element placeholder, int x, int y, Orientation orientation) {
  
          m_placeholder = placeholder;
          repositionPlaceholder(x, y, orientation);
      }
  
      /**
       * @see org.opencms.gwt.client.dnd.I_CmsDropTarget#onDrop(org.opencms.gwt.client.dnd.I_CmsDraggable)
       */
      public void onDrop(I_CmsDraggable draggable) {
  
          // nothing to do
      }
  
      /**
       * Removes the highlighting border.<p>
       */
      public void removeHighlighting() {
  
          if (m_highlighting != null) {
              m_highlighting.removeFromParent();
              m_highlighting = null;
          }
      }
  
      /**
       * @see org.opencms.gwt.client.dnd.I_CmsDropTarget#removePlaceholder()
       */
      public void removePlaceholder() {
  
          if (m_placeholder == null) {
              return;
          }
          m_placeholder.removeFromParent();
          m_placeholder = null;
          m_placeholderIndex = -1;
      }
  
      /**
       * @see org.opencms.gwt.client.dnd.I_CmsDropTarget#repositionPlaceholder(int, int, org.opencms.gwt.client.dnd.CmsDNDHandler.Orientation)
       */
      public void repositionPlaceholder(int x, int y, Orientation orientation) {
  
          // handle vertical orientation only
          m_placeholderIndex = CmsDomUtil.positionElementInside(m_placeholder, getElement(), m_placeholderIndex, -1, y);
      }
  
      /**
       * @see org.opencms.gwt.client.I_CmsHasResizeOnShow#resizeOnShow()
       */
      public void resizeOnShow() {
  
          for (Widget w : this) {
              if (w instanceof I_CmsHasResizeOnShow) {
                  ((I_CmsHasResizeOnShow)w).resizeOnShow();
              }
          }
      }
  
      /**
       * Updates the highlighting position if present.<p>
       */
      public void updateHighlightingPosition() {
  
          if (m_highlighting != null) {
              m_highlighting.resetPosition();
          }
      }
  }
  