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/*
* Copyright (c) 2003, 2024, 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.EventQueue;
import java.awt.Frame;
import java.awt.Panel;
import java.awt.Point;
import java.awt.Robot;
import java.awt.dnd.DnDConstants;
import java.awt.dnd.DragGestureListener;
import java.awt.dnd.DragSource;
import java.awt.event.InputEvent;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionAdapter;
/*
@test
@key headful
@bug 4415175
@summary tests DragSource.getDragThreshold() and
that the AWT default drag gesture recognizers
honor the drag gesture motion threshold
*/
public class DragThresholdTest {
private static Frame frame;
private static Panel panel;
private static MouseEvent lastMouseEvent;
private static volatile boolean failed;
private static volatile Point startPoint;
private static volatile Point endPoint;
public static void main(String[] args) throws Exception {
try {
Robot robot = new Robot();
EventQueue.invokeAndWait(DragThresholdTest::createAndShowDnD);
robot.waitForIdle();
robot.delay(1000);
EventQueue.invokeAndWait(() -> {
Point p = panel.getLocationOnScreen();
p.translate(50, 50);
startPoint = p;
endPoint = new Point(p.x + 2 * DragSource.getDragThreshold(),
p.y + 2 * DragSource.getDragThreshold());
});
robot.mouseMove(startPoint.x, startPoint.y);
robot.mousePress(InputEvent.BUTTON1_DOWN_MASK);
for (Point p = new Point(startPoint); !p.equals(endPoint);
p.translate(sign(endPoint.x - p.x),
sign(endPoint.y - p.y))) {
robot.mouseMove(p.x, p.y);
robot.delay(100);
}
robot.mouseRelease(InputEvent.BUTTON1_DOWN_MASK);
robot.waitForIdle();
robot.delay(200);
if (failed) {
throw new RuntimeException("drag gesture recognized too early");
}
} finally {
EventQueue.invokeAndWait(() -> {
if (frame != null) {
frame.dispose();
}
});
}
}
private static void createAndShowDnD() {
frame = new Frame("DragThresholdTest");
panel = new Panel();
// Mouse motion listener mml is added to the panel first.
// We rely on it that this listener will be called first.
panel.addMouseMotionListener(new MouseMotionAdapter() {
public void mouseDragged(MouseEvent evt) {
lastMouseEvent = evt;
System.out.println(evt);
}
});
frame.add(panel);
frame.setSize(200, 200);
frame.setLocationRelativeTo(null);
DragGestureListener dgl = dge -> {
Point dragOrigin = dge.getDragOrigin();
int diffx = Math.abs(dragOrigin.x - lastMouseEvent.getX());
int diffy = Math.abs(dragOrigin.y - lastMouseEvent.getY());
System.out.println("dragGestureRecognized(): " +
" diffx=" + diffx + " diffy=" + diffy +
" DragSource.getDragThreshold()="
+ DragSource.getDragThreshold());
if (diffx <= DragSource.getDragThreshold() &&
diffy <= DragSource.getDragThreshold()) {
failed = true;
System.out.println("drag gesture recognized too early!");
}
};
// Default drag gesture recognizer is a mouse motion listener.
// It is added to the panel second.
new DragSource().createDefaultDragGestureRecognizer(
panel,
DnDConstants.ACTION_COPY_OR_MOVE, dgl);
frame.setVisible(true);
}
private static int sign(int n) {
return Integer.compare(n, 0);
}
}
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