1 /*
   2  * Copyright (c) 2014, 2017, 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 com.sun.javafx.tk.Toolkit;
  29 import java.awt.Component;
  30 import java.awt.Cursor;
  31 import java.awt.Point;
  32 import java.awt.SecondaryLoop;
  33 import java.awt.datatransfer.DataFlavor;
  34 import java.awt.datatransfer.Transferable;
  35 import java.awt.dnd.DnDConstants;
  36 import java.awt.dnd.DragGestureEvent;
  37 import java.awt.dnd.DragGestureListener;
  38 import java.awt.dnd.DragGestureRecognizer;
  39 import java.awt.dnd.DragSource;
  40 import java.awt.dnd.DropTarget;
  41 import java.awt.dnd.DropTargetContext;
  42 import java.awt.dnd.DropTargetDragEvent;
  43 import java.awt.dnd.DropTargetDropEvent;
  44 import java.awt.dnd.DropTargetListener;
  45 import java.awt.dnd.InvalidDnDOperationException;
  46 import java.awt.dnd.MouseDragGestureRecognizer;
  47 import java.security.AccessController;
  48 import java.security.PrivilegedAction;
  49 import java.util.HashMap;
  50 import java.util.Map;
  51 import javafx.application.Platform;
  52 import javafx.event.EventHandler;
  53 import javafx.event.EventType;
  54 import javafx.scene.input.DataFormat;
  55 import javafx.scene.input.DragEvent;
  56 import javafx.scene.input.Dragboard;
  57 import javafx.scene.input.MouseEvent;
  58 import javafx.scene.input.TransferMode;
  59 
  60 import javafx.embed.swing.SwingNode;
  61 
  62 /**
  63  * A utility class to connect DnD mechanism of Swing and FX.
  64  * It allows Swing content to use the FX machinery for performing DnD.
  65  */
  66 final public class FXDnD {
  67     private static SwingNode node;
  68     public static boolean fxAppThreadIsDispatchThread;
  69     private SwingNode getNode() { return node; }
  70     private static FXDnDInterop fxdndiop;
  71 
  72     static {
  73         AccessController.doPrivileged(new PrivilegedAction<Object>() {
  74             public Object run() {
  75                 fxAppThreadIsDispatchThread =
  76                         "true".equals(System.getProperty("javafx.embed.singleThread"));
  77                 return null;
  78             }
  79         });
  80 
  81         InteropFactory instance = null;
  82         try {
  83             instance = InteropFactory.getInstance();
  84         } catch (Exception e) {
  85             throw new ExceptionInInitializerError(e);
  86         }
  87         fxdndiop = instance.createFXDnDImpl();
  88     }
  89 
  90     public FXDnD(SwingNode node) {
  91         this.node = node;
  92         fxdndiop.setNode(node);
  93     }
  94 
  95     public Object createDragSourceContext(DragGestureEvent dge) 
  96                     throws InvalidDnDOperationException {
  97         return fxdndiop.createDragSourceContext(dge);
  98     }
  99 
 100     public <T extends DragGestureRecognizer> T createDragGestureRecognizer(
 101             Class<T> abstractRecognizerClass,
 102             DragSource ds, Component c, int srcActions,
 103             DragGestureListener dgl)
 104     {
 105         return fxdndiop.createDragGestureRecognizer(ds, c, srcActions, dgl);
 106     }
 107 
 108     public void addDropTarget(DropTarget dt) {
 109         fxdndiop.addDropTarget(dt, node);
 110     }
 111 
 112     public void removeDropTarget(DropTarget dt) {
 113         fxdndiop.removeDropTarget(dt, node);
 114     }
 115 }