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/*
* Copyright (c) 2000, 2023, Oracle and/or its affiliates. All rights reserved.
* 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.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
import java.awt.AWTEvent;
import java.awt.Component;
import java.awt.Dialog;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Frame;
import java.awt.Point;
import java.awt.Robot;
import java.awt.datatransfer.StringSelection;
import java.awt.datatransfer.Transferable;
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.DropTargetDragEvent;
import java.awt.dnd.DropTargetDropEvent;
import java.awt.dnd.DropTargetListener;
import java.awt.event.AWTEventListener;
import java.awt.event.InputEvent;
import java.awt.event.MouseEvent;
/*
@test
@bug 4352221
@summary verifies that showing a modal dialog on drag doesn't hang
@key headful
@run main ModalDialogOnDragDeadlockTest
*/
public class ModalDialogOnDragDeadlockTest implements AWTEventListener {
volatile Frame frame;
volatile Dialog dialog;
volatile Point srcPoint;
volatile Dimension d;
volatile boolean finished;
static final Object SYNC_LOCK = new Object();
static final int FRAME_ACTIVATION_TIMEOUT = 3000;
static final int DROP_COMPLETION_TIMEOUT = 5000;
static final int MOUSE_RELEASE_TIMEOUT = 1000;
volatile DragSource dragSource;
volatile Transferable transferable;
volatile DragGestureListener dragGestureListener;
volatile DragGestureRecognizer dragGestureRecognizer;
volatile DropTargetListener dropTargetListener;
volatile DropTarget dropTarget;
Component clickedComponent = null;
public static void main(String[] args) throws Exception {
ModalDialogOnDragDeadlockTest test = new ModalDialogOnDragDeadlockTest();
EventQueue.invokeAndWait(test::init);
try {
test.start();
} finally {
EventQueue.invokeAndWait(() -> {
if (test.frame != null) {
test.frame.dispose();
}
});
}
}
public void init() {
frame = new Frame("ModalDialogOnDragDeadlockTest");
dialog = new Dialog(frame, "Modal dialog", true);
frame.setTitle("Test frame");
frame.setBounds(100, 100, 200, 200);
dragSource = DragSource.getDefaultDragSource();
transferable = new StringSelection("TEXT");
dragGestureListener = new DragGestureListener() {
public void dragGestureRecognized(DragGestureEvent dge) {
dge.startDrag(null, transferable);
}
};
dragGestureRecognizer =
dragSource.createDefaultDragGestureRecognizer(frame, DnDConstants.ACTION_COPY,
dragGestureListener);
dropTargetListener = new DropTargetAdapter() {
public void dragOver(DropTargetDragEvent dtde) {
dialog.setBounds(200, 200, 200, 200);
dialog.setVisible(true);
}
public void drop(DropTargetDropEvent dtde) {
dtde.acceptDrop(DnDConstants.ACTION_COPY);
dtde.dropComplete(true);
}
};
dropTarget = new DropTarget(frame, dropTargetListener);
frame.getToolkit().addAWTEventListener(this, AWTEvent.MOUSE_EVENT_MASK);
frame.setVisible(true);
}
public static int sign(int n) {
return n < 0 ? -1 : n == 0 ? 0 : 1;
}
public void start() throws Exception {
finished = false;
Robot robot = new Robot();
robot.waitForIdle();
Thread.sleep(FRAME_ACTIVATION_TIMEOUT);
EventQueue.invokeAndWait(() -> {
srcPoint = frame.getLocationOnScreen();
d = frame.getSize();
});
srcPoint.translate(d.width / 2, d.height / 2);
if (!pointInComponent(robot, srcPoint, frame)) {
System.err.println("WARNING: Couldn't locate source frame.");
return;
}
final Point dstPoint = new Point(srcPoint);
dstPoint.translate(d.width / 4, d.height / 4);
robot.mouseMove(srcPoint.x, srcPoint.y);
robot.mousePress(InputEvent.BUTTON1_MASK);
for (;!srcPoint.equals(dstPoint);
srcPoint.translate(sign(dstPoint.x - srcPoint.x),
sign(dstPoint.y - srcPoint.y))) {
robot.mouseMove(srcPoint.x, srcPoint.y);
Thread.sleep(50);
}
robot.mouseRelease(InputEvent.BUTTON1_MASK);
Thread.sleep(DROP_COMPLETION_TIMEOUT);
}
public void reset() {
clickedComponent = null;
}
public void eventDispatched(AWTEvent e) {
if (e.getID() == MouseEvent.MOUSE_RELEASED) {
clickedComponent = (Component)e.getSource();
synchronized (SYNC_LOCK) {
SYNC_LOCK.notifyAll();
}
}
}
boolean pointInComponent(Robot robot, Point p, Component comp)
throws InterruptedException {
robot.waitForIdle();
reset();
robot.mouseMove(p.x, p.y);
robot.mousePress(InputEvent.BUTTON1_MASK);
synchronized (SYNC_LOCK) {
robot.mouseRelease(InputEvent.BUTTON1_MASK);
SYNC_LOCK.wait(MOUSE_RELEASE_TIMEOUT);
}
Component c = clickedComponent;
while (c != null && c != comp) {
c = c.getParent();
}
return c == comp;
}
}
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