1 /*
   2  * Copyright (c) 2014, 2018, 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.embed.swing;
  27 
  28 import java.awt.Component;
  29 import java.awt.dnd.DragGestureEvent;
  30 import java.awt.dnd.DragGestureListener;
  31 import java.awt.dnd.DragGestureRecognizer;
  32 import java.awt.dnd.DragSource;
  33 import java.awt.dnd.DropTarget;
  34 import java.awt.dnd.InvalidDnDOperationException;
  35 import java.security.AccessController;
  36 import java.security.PrivilegedAction;
  37 
  38 import javafx.embed.swing.SwingNode;
  39 
  40 /**
  41  * A utility class to connect DnD mechanism of Swing and FX.
  42  * It allows Swing content to use the FX machinery for performing DnD.
  43  */
  44 final public class FXDnD {
  45     private static SwingNode node;
  46     public static boolean fxAppThreadIsDispatchThread;
  47     private SwingNode getNode() { return node; }
  48     private static FXDnDInterop fxdndiop;
  49 
  50     static {
  51         AccessController.doPrivileged(new PrivilegedAction<Object>() {
  52             public Object run() {
  53                 fxAppThreadIsDispatchThread =
  54                         "true".equals(System.getProperty("javafx.embed.singleThread"));
  55                 return null;
  56             }
  57         });
  58 
  59         InteropFactory instance = null;
  60         try {
  61             instance = InteropFactory.getInstance();
  62         } catch (Exception e) {
  63             throw new ExceptionInInitializerError(e);
  64         }
  65         fxdndiop = instance.createFXDnDImpl();
  66     }
  67 
  68     public FXDnD(SwingNode node) {
  69         this.node = node;
  70         fxdndiop.setNode(node);
  71     }
  72 
  73     public Object createDragSourceContext(DragGestureEvent dge) 
  74                     throws InvalidDnDOperationException {
  75         return fxdndiop.createDragSourceContext(dge);
  76     }
  77 
  78     public <T extends DragGestureRecognizer> T createDragGestureRecognizer(
  79             Class<T> abstractRecognizerClass,
  80             DragSource ds, Component c, int srcActions,
  81             DragGestureListener dgl)
  82     {
  83         return fxdndiop.createDragGestureRecognizer(ds, c, srcActions, dgl);
  84     }
  85 
  86     public void addDropTarget(DropTarget dt) {
  87         fxdndiop.addDropTarget(dt, node);
  88     }
  89 
  90     public void removeDropTarget(DropTarget dt) {
  91         fxdndiop.removeDropTarget(dt, node);
  92     }
  93 }