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  1. JDK
  2. JDK-8187986

Sub dialogs do not recognize Drag gesture in MAC OS X

    Details

    • Subcomponent:
    • CPU:
      x86
    • OS:
      os_x

      Description

      FULL PRODUCT VERSION :
      java version "1.8.0_144"
      Java(TM) SE Runtime Environment (build 1.8.0_144-b01)
      Java HotSpot(TM) 64-Bit Server VM (build 25.144-b01, mixed mode)

      ADDITIONAL OS VERSION INFORMATION :
      Darwin 15.6.0 Darwin Kernel Version 15.6.0: Sun Jun 4 21:43:07 PDT 2017; root:xnu-3248.70.3~1/RELEASE_X86_64 x86_64

      A DESCRIPTION OF THE PROBLEM :
      Dragging a component - as per the test program - does not work in subdialogs (It does work in a window component).



      STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
      See Test-Porgram

      EXPECTED VERSUS ACTUAL BEHAVIOR :
      EXPECTED -
      Dragging works
      ACTUAL -
      Dragging does not work

      REPRODUCIBILITY :
      This bug can be reproduced always.

      ---------- BEGIN SOURCE ----------
      import java.awt.BorderLayout;
      import java.awt.datatransfer.DataFlavor;
      import java.awt.datatransfer.Transferable;
      import java.awt.datatransfer.UnsupportedFlavorException;
      import java.awt.dnd.DnDConstants;
      import java.awt.dnd.DragGestureEvent;
      import java.awt.dnd.DragGestureListener;
      import java.awt.dnd.DragSource;
      import java.awt.dnd.DragSourceAdapter;
      import java.awt.dnd.DragSourceDragEvent;
      import java.awt.dnd.DragSourceEvent;
      import java.awt.dnd.DragSourceListener;
      import java.awt.dnd.DropTargetAdapter;
      import java.awt.dnd.DropTargetDropEvent;
      import java.awt.event.ActionEvent;
      import java.io.IOException;

      import javax.swing.AbstractAction;
      import javax.swing.Action;
      import javax.swing.JButton;
      import javax.swing.JDialog;
      import javax.swing.JFrame;
      import javax.swing.JLabel;
      import javax.swing.JList;
      import javax.swing.JTextArea;

      public class Drag {

          private static JTextArea console = new JTextArea();

          static public void main(String[] s) {
              JFrame f = new JFrame();
              f.setSize(800, 600);
              f.getContentPane().setLayout(new BorderLayout());
              f.getContentPane().add(new JButton(openDialog(f)), BorderLayout.NORTH);
              f.getContentPane().add(console, BorderLayout.CENTER);
              f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
              f.setLocationRelativeTo(null);
              f.setVisible(true);
          }

          private static Action openDialog(JFrame f) {
              return new AbstractAction("open Drag'n'Drop Dialog"){
                  public void actionPerformed(ActionEvent e) {
                      JDialog dialog = new JDialog(f);
                      dialog.getContentPane().setLayout(new BorderLayout());
                      JList<String> list = new JList<String>(new String[]{"drag me ->"});
      DragSource.getDefaultDragSource().createDefaultDragGestureRecognizer(list, DnDConstants.ACTION_COPY_OR_MOVE, new DragGesture());

                      JLabel lbl = new JLabel("drop here");
                      lbl.setDropTarget(new DropTarget(lbl));
                      dialog.getContentPane().add(list, BorderLayout.WEST);
                      dialog.getContentPane().add(lbl, BorderLayout.CENTER);
                      dialog.setSize(300, 180);
                      dialog.setLocationRelativeTo(f);
                      dialog.setVisible(true);
                  }

              };
          }

          static class DragGesture implements DragGestureListener {
              public void dragGestureRecognized(DragGestureEvent dge) {
                  console.setText(console.getText() + "\ndragGesture: \t" + dge.toString());
                  Transferable transferable =new Transferable() {
                      public boolean isDataFlavorSupported(DataFlavor flavor) {
                          return true;
                      }
                      public DataFlavor[] getTransferDataFlavors() {
                          return new DataFlavor[]{DataFlavor.stringFlavor};
                      }
                      public Object getTransferData(DataFlavor flavor) throws UnsupportedFlavorException, IOException {
                          return "transferData";
                      }
                  };
                  DragSourceListener sourceListener = new DragSourceAdapter() {
                      public void dragExit(DragSourceEvent dse) {
                          console.setText(console.getText() + "\ndragExit: \t" + dse.toString());
                      }
                      public void dragEnter(DragSourceDragEvent dsde) {
                          console.setText(console.getText() + "\ndragEnter: \t" + dsde.toString());
                      }
                  };
                  dge.startDrag(DragSource.DefaultCopyDrop, transferable, sourceListener);
              }
          }

          static class DropTarget extends java.awt.dnd.DropTarget {
              public DropTarget(JLabel lbl) {
                  super(lbl, new DropTargetAdapter() {
                      public void drop(DropTargetDropEvent dtde) {
                          try {
      lbl.setText(dtde.getTransferable().getTransferData(DataFlavor.stringFlavor).toString());
                          } catch (Exception e) {
                              console.setText(e.getMessage());
                          }
      dtde.acceptDrop(DnDConstants.ACTION_COPY_OR_MOVE);
                      }
                  });
              }
          }

      }

      ---------- END SOURCE ----------

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            • Assignee:
              pardesha Pardeep Sharma
              Reporter:
              webbuggrp Webbug Group
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              Dates

              • Created:
                Updated:
                Resolved: