1 /*
   2  * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package com.sun.javafx.scene.layout;
  27 
  28 import com.sun.javafx.util.Utils;
  29 import javafx.scene.layout.Pane;
  30 
  31 /*
  32  * Used to access internal methods of Pane.
  33  */
  34 public class PaneHelper extends RegionHelper {
  35 
  36     private static final PaneHelper theInstance;
  37     private static PaneAccessor paneAccessor;
  38 
  39     static {
  40         theInstance = new PaneHelper();
  41         Utils.forceInit(Pane.class);
  42     }
  43 
  44     private static PaneHelper getInstance() {
  45         return theInstance;
  46     }
  47 
  48     public static void initHelper(Pane pane) {
  49         setHelper(pane, getInstance());
  50     }
  51 
  52 
  53     public static void setPaneAccessor(final PaneAccessor newAccessor) {
  54         if (paneAccessor != null) {
  55             throw new IllegalStateException();
  56         }
  57 
  58         paneAccessor = newAccessor;
  59     }
  60 
  61     public interface PaneAccessor {
  62     }
  63 
  64 }