1 /*
   2  * Copyright (c) 2013, 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;
  27 
  28 import com.sun.javafx.sg.prism.NGNode;
  29 import com.sun.javafx.util.Utils;
  30 import javafx.scene.Camera;
  31 import javafx.scene.Node;
  32 import javafx.scene.SubScene;
  33 
  34 /**
  35  * Used to access internal methods of SubScene.
  36  */
  37 public class SubSceneHelper extends NodeHelper {
  38 
  39     private static final SubSceneHelper theInstance;
  40     private static SubSceneAccessor subSceneAccessor;
  41 
  42     static {
  43         theInstance = new SubSceneHelper();
  44         Utils.forceInit(SubScene.class);
  45     }
  46 
  47     private static SubSceneHelper getInstance() {
  48         return theInstance;
  49     }
  50 
  51     public static void initHelper(SubScene subScene) {
  52         setHelper(subScene, getInstance());
  53     }
  54 
  55     @Override
  56     protected NGNode createPeerImpl(Node node) {
  57         return subSceneAccessor.doCreatePeer(node);
  58     }
  59 
  60     @Override
  61     protected void updatePeerImpl(Node node) {
  62         super.updatePeerImpl(node);
  63         subSceneAccessor.doUpdatePeer(node);
  64     }
  65 
  66     public static boolean isDepthBuffer(SubScene subScene) {
  67         return subSceneAccessor.isDepthBuffer(subScene);
  68     }
  69 
  70     public static Camera getEffectiveCamera(SubScene subScene) {
  71         return subSceneAccessor.getEffectiveCamera(subScene);
  72     }
  73 
  74     public static void setSubSceneAccessor(final SubSceneAccessor newAccessor) {
  75         if (subSceneAccessor != null) {
  76             throw new IllegalStateException();
  77         }
  78 
  79         subSceneAccessor = newAccessor;
  80     }
  81 
  82     public interface SubSceneAccessor {
  83         NGNode doCreatePeer(Node node);
  84         void doUpdatePeer(Node node);
  85         boolean isDepthBuffer(SubScene subScene);
  86         Camera getEffectiveCamera(SubScene subScene);
  87     }
  88 
  89 }