Dragging desktop file into a JPanel causes the application and Windows 10 desktop to freeze

[stagney]

This is as of AdoptOpenJDK 11.0.10+9.

I tried with 11.0.6+10 and 11.0.9+11 and it works fine.

The problem still exists in 11.0.11+9.

We have an internal Swing application. I just received a jira on this problem yesterday. My users are all on 11.0.10+9. We are all running Windows 10 64 bit. I have two files on my desktop; one is an Excel file (xlsx) and the other is an Outlook message file (msg). I open our java application, and then open a new Panel inside that. I switch between trying to drag each file into the application, and then the icon freezes inside the panel. It appears to be a problem painting the little red "O with a slash" that indicates that the panel is not a drop target. It not only freezes the java application, but the entire Windows desktop. As soon as I kill my java application, it all unfreezes. I commented out all Drag and Drop code in the application, and the problem remains.

Please let me know if you need anymore detail

Sam

[karianna]

We have 11.0.12 coming out shortly, we'll get you to try that first :-)

[stagney]

Picture of icon frozen while dragging into application

[robo-abacus]

here is a bug report on openjdk https://bugs.openjdk.java.net/browse/JDK-8262446 I think in 11.0.12, this issue is fixed.

[stagney]

My users are still experiencing this problem. I tried copying another screenshot to this comment, but it won't let me. Getting "we can't process that file" error

11.0.14.1+1 fail 11.0.14 +7 fail 11.0.13 +8 fail 11.0.12 +7 fail 11.0.9+11 works 11.0.6+10 works

[jerboaa]

https://bugs.openjdk.java.net/browse/JDK-8274751 could be the upstream bug. To be fixed with 11.0.16 (July). There aren't any early access builds for those yet, unfortunately.

[github-actions[bot]]

We are marking this issue as stale because it has not been updated for a while. This is just a way to keep the support issues queue manageable. It will be closed soon unless the stale label is removed by a committer, or a new comment is made.

[jerboaa]

Please check if you can still reproduce with JDK 11 nightly builds (11.0.16 ea): https://adoptium.net/temurin/nightly/?version=11

[stagney]

I was just now able to reproduce with 1.0.14 and 1.0.16+7

[karianna]

Hmm, it's hard for us to reproduce this. Is there short code sample you can provide that replicates this behaviour?

[stagney]

public class TestDND { private JFrame _popup = new JFrame("PopUp"); private MyWindowListener _windowListener = new MyWindowListener();

public static void main(String[] args) {
    JFrame mf = new JFrame("Test Drag & Drop");
    mf.setBounds(100, 100, 500, 375);
    mf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    JPanel panel = new JPanel();
    mf.getContentPane().add(panel, BorderLayout.CENTER);
    panel.setLayout(new BorderLayout(0, 0));

    JToolBar toolBar = new JToolBar("Menu");
    toolBar.setOrientation(SwingConstants.VERTICAL);
    toolBar.setFloatable(true);
    panel.add(toolBar, BorderLayout.WEST);

    JPanel mainPanel = new JPanel();
    panel.add(mainPanel);

    mf.setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
    mf.setMinimumSize(new Dimension(1000, 900));

    JButton button = new JButton("Open Popup");
    toolBar.add(button, 0);

    TestDND testDND = new TestDND();
    testDND._popup.setSize(new Dimension(250, 400));
    testDND._popup.addWindowListener(testDND._windowListener);

    button.addActionListener(new ActionListener() {
        @Override
        public void actionPerformed(ActionEvent e) {
            Component comp = toolBar.getComponent(0);
            Point los = toolBar.getLocationOnScreen();

            testDND._popup.setLocation(new Point(los.x, los.y + comp.getHeight() + 5));
            testDND._popup.setVisible(true);
        }
    });

    new DropTarget(mf, new DropTargetListener() {
        @Override
        public void dragEnter(DropTargetDragEvent e) {
        }

        @Override
        public void dragExit(DropTargetEvent e) {
        }

        @Override
        public void dragOver(DropTargetDragEvent e) {
        }

        @Override
        public void drop(DropTargetDropEvent e) {
            e.acceptDrop(DnDConstants.ACTION_COPY_OR_MOVE);
        }

        @Override
        public void dropActionChanged(DropTargetDragEvent e) {
        }
    });

    mf.pack();
    mf.setVisible(true);
}

private class MyWindowListener implements WindowListener {
    @Override
    public void windowActivated(WindowEvent e) {
    }

    @Override
    public void windowClosed(WindowEvent e) {
    }

    @Override
    public void windowClosing(WindowEvent e) {
    }

    @Override
    public void windowDeactivated(WindowEvent e) {
        if(_popup.isVisible()) {
            _popup.setVisible(false);
        }
    }

    @Override
    public void windowDeiconified(WindowEvent e) {
    }

    @Override
    public void windowIconified(WindowEvent e) {
    }

    @Override
    public void windowOpened(WindowEvent e) {
    }
}

}

[stagney]

I am running Windows 10. and jdk 11.0.16+7.

I run this from Eclipse.

It opens on my desktop.

I click the Open Popup button.

Then I try dragging an Excel file into the window.

Most of the time it freezes within two or three tries.

[stagney]

[github-actions[bot]]

We are marking this issue as stale because it has not been updated for a while. This is just a way to keep the support issues queue manageable. It will be closed soon unless the stale label is removed by a committer, or a new comment is made.

[github-actions[bot]]

We are marking this issue as stale because it has not been updated for a while. This is just a way to keep the support issues queue manageable. It will be closed soon unless the stale label is removed by a committer, or a new comment is made.