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.sitemap;
  
  import org.opencms.ui.FontOpenCms;
  import org.opencms.ui.components.OpenCmsTheme;
  
  import com.vaadin.ui.Button;
  import com.vaadin.ui.themes.ValoTheme;
  
  /**
   * Button used for opening / closing tree levels.<p>
   */
  public class CmsSitemapTreeNodeOpener extends Button {
  
      /** 'Minus' icon for the open state. */
      public static final String MINUS = new String(new int[] {FontOpenCms.TREE_MINUS.getCodepoint()}, 0, 1);
  
      /** 'Plus' icon for the closed state. */
      public static final String PLUS = new String(new int[] {FontOpenCms.TREE_PLUS.getCodepoint()}, 0, 1);
  
      /** Serial version id. */
      private static final long serialVersionUID = 1L;
  
      /**
       * Creates a new instance.<p<
       */
      public CmsSitemapTreeNodeOpener() {
          super();
          addStyleName("opencms-font-icon");
          addStyleName("o-sitemap-tree-opener");
          addStyleName(ValoTheme.BUTTON_BORDERLESS);
          addStyleName(OpenCmsTheme.BUTTON_UNPADDED);
          setStyleOpen(false);
      }
  
      /**
       * Sets the style of the button.<p>
       *
       * @param open true if the button should be set to 'open' state, false for the 'closed' state
       */
      public void setStyleOpen(boolean open) {
  
          setCaption(open ? MINUS : PLUS);
      }
  }
  