jdk-24/test/jdk/java/awt/dnd/AcceptDropMultipleTimes/AcceptDropMultipleTimes.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
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/**
 * @test
 * @key headful
 * @bug 8029979
 * @summary Checks if acceptDrop() can be called several times
 * @library ../../regtesthelpers
 * @build Util
 * @compile AcceptDropMultipleTimes.java
 * @run main/othervm AcceptDropMultipleTimes
 * @author anthony.petrov@oracle.com
 */

import test.java.awt.regtesthelpers.Util;

import java.awt.Color;
import java.awt.Cursor;
import java.awt.Dimension;
import java.awt.Frame;
import java.awt.Panel;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.Robot;
import java.awt.Toolkit;
import java.awt.datatransfer.StringSelection;
import java.awt.dnd.DnDConstants;
import java.awt.dnd.DragGestureEvent;
import java.awt.dnd.DragGestureListener;
import java.awt.dnd.DragSource;
import java.awt.dnd.DropTarget;
import java.awt.dnd.DropTargetAdapter;
import java.awt.dnd.DropTargetDropEvent;
import java.awt.event.InputEvent;
import java.io.File;
import java.io.IOException;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicReference;
import javax.imageio.ImageIO;
import javax.swing.SwingUtilities;

public class AcceptDropMultipleTimes {

    private static final int FRAME_SIZE = 100;
    private static CountDownLatch dropCompleteLatch = new CountDownLatch(1);

    private static volatile Frame f;

    private static void initAndShowUI() {
        f = new Frame("Test frame");
        f.setSize(FRAME_SIZE, FRAME_SIZE);
        f.setLocationRelativeTo(null);
        f.setUndecorated(true);

        final DraggablePanel dragSource = new DraggablePanel();
        dragSource.setBackground(Color.yellow);
        DropTarget dt = new DropTarget(dragSource, new DropTargetAdapter() {
            @Override public void drop(DropTargetDropEvent dtde) {
                // The first call always succeeds
                dtde.acceptDrop(DnDConstants.ACTION_COPY);

                // The second call should succeed if the fix works
                dtde.acceptDrop(DnDConstants.ACTION_MOVE);

                dtde.dropComplete(true);
                dropCompleteLatch.countDown();
            }
        });
        dragSource.setDropTarget(dt);
        f.add(dragSource);
        f.setAlwaysOnTop(true);
        f.setVisible(true);
    }

    public static void main(String[] args) throws Throwable {
        try {

            SwingUtilities.invokeAndWait(() -> initAndShowUI());

            Robot r = new Robot();
            r.setAutoDelay(50);
            Util.waitForIdle(r);
            final AtomicReference<Point> frameLoc = new AtomicReference<>();
            SwingUtilities.invokeAndWait(() -> frameLoc.set(f.getLocationOnScreen()));
            Point loc = frameLoc.get();
            Util.drag(r,
                    new Point(loc.x + FRAME_SIZE / 3, loc.y + FRAME_SIZE / 3),
                    new Point(loc.x + FRAME_SIZE / 3 * 2, loc.y + FRAME_SIZE / 3 * 2),
                    InputEvent.BUTTON1_DOWN_MASK);
            Util.waitForIdle(r);
            if(!dropCompleteLatch.await(10, TimeUnit.SECONDS)) {
                captureScreen(r);
                throw new RuntimeException("Waited too long, but the drop is not completed");
            }
        } finally {
            if (f != null) {
                f.dispose();
            }
        }
    }
    private static void captureScreen(Robot r) {
        Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
        try {
            ImageIO.write(
                    r.createScreenCapture(new Rectangle(0, 0, screenSize.width, screenSize.height)),
                    "png",
                    new File("FailedScreenImage.png")
                         );
        } catch (IOException ignore) {
        }
    }
    private static class DraggablePanel extends Panel implements DragGestureListener {

        public DraggablePanel() {
            (new DragSource()).createDefaultDragGestureRecognizer(this, DnDConstants.ACTION_COPY, this);
        }

        @Override
        public void dragGestureRecognized(DragGestureEvent dge) {
            dge.startDrag(Cursor.getDefaultCursor(), new StringSelection("test"));
        }
    }
}