import java.awt.Color;
import java.awt.datatransfer.StringSelection;
import java.awt.dnd.DnDConstants;
import java.awt.dnd.DragGestureEvent;
import java.awt.dnd.DragGestureListener;
import java.awt.dnd.DragGestureRecognizer;
import java.awt.dnd.DragSource;
import java.awt.dnd.DropTarget;
import java.awt.dnd.DropTargetAdapter;
import java.awt.dnd.DropTargetDropEvent;
import java.awt.dnd.DropTargetListener;

import javafx.application.Application;
import javafx.beans.InvalidationListener;
import javafx.beans.Observable;
import javafx.embed.swing.SwingNode;
import javafx.scene.Scene;
import javafx.scene.layout.BorderPane;
import javafx.stage.Stage;

import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;

public class SwingFx extends Application {

  private DragSource dragSource;
  private DropTarget dropTarget;
  private DropTargetListener dropListener;
  private DragGestureListener dgListener;
  private DragGestureRecognizer dragRecognizer;
  
  public static void main(String[] args) {
    Application.launch(args);
  }

  @Override
  public void start(Stage stage) {

    final SwingNode swingNode = new SwingNode();

    createSwingContent(swingNode);
    BorderPane pane = new BorderPane();
    pane.setCenter(swingNode);

    stage.setTitle("Swing in JavaFX");
    stage.setScene(new Scene(pane, 250, 150));
    stage.onCloseRequestProperty().addListener(new InvalidationListener(){
      @Override public void invalidated(Observable observable) {
        System.exit(0);
      }
    });
    stage.show();
  }

  private void createSwingContent(final SwingNode swingNode) {
    SwingUtilities.invokeLater(new Runnable() {

      @Override
      public void run() {

        JPanel panel = new JPanel();
        panel.setBackground(Color.RED);
        panel.add(new JLabel("Drag me!"));
        
        swingNode.setContent(panel);

        dgListener = new DragGestureListener() {
          @Override public void dragGestureRecognized(DragGestureEvent dge) {
            System.out.println("drag recognized...");
            dge.startDrag(java.awt.Cursor.getPredefinedCursor(java.awt.Cursor.HAND_CURSOR), new StringSelection("some string data"));
          }
        };
        
        dropListener = new DropTargetAdapter() {
          @Override public void drop(DropTargetDropEvent dtde) {
            //this is never called =(
            System.out.println("drop... " + dtde.getTransferable());
          }
        };
        
        dragSource = new DragSource();
        dragRecognizer = dragSource.createDefaultDragGestureRecognizer(panel, DnDConstants.ACTION_COPY_OR_MOVE, dgListener);
        dropTarget = new DropTarget(panel, dropListener);
        System.out.println(dragRecognizer);
        System.out.println(dropTarget);
        
      }
    });
  }
}