1/*
2 * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24/**
25 * @test
26 * @key headful
27 * @bug 8024163
28 * @summary Checks the dragEnter event is correctly generated
29 * @library ../../regtesthelpers
30 * @build Util
31 * @compile ExtraDragEnterTest.java
32 * @run main/othervm ExtraDragEnterTest
33 * @author Petr Pchelko
34 */
35
36import test.java.awt.regtesthelpers.Util;
37
38import javax.swing.*;
39import java.awt.*;
40import java.awt.datatransfer.StringSelection;
41import java.awt.dnd.DnDConstants;
42import java.awt.dnd.DragGestureEvent;
43import java.awt.dnd.DragGestureListener;
44import java.awt.dnd.DragSource;
45import java.awt.dnd.DropTarget;
46import java.awt.dnd.DropTargetAdapter;
47import java.awt.dnd.DropTargetDragEvent;
48import java.awt.dnd.DropTargetDropEvent;
49import java.awt.event.InputEvent;
50import java.util.concurrent.atomic.AtomicInteger;
51
52public class ExtraDragEnterTest {
53
54    private static final int FRAME_SIZE = 100;
55    private static final int FRAME_LOCATION = 100;
56
57    private static AtomicInteger dragEnterCalled = new AtomicInteger(0);
58
59    private static volatile Panel mainPanel;
60    private static volatile Frame f;
61
62    private static void initAndShowUI() {
63        f = new Frame("Test frame");
64        f.setBounds(FRAME_LOCATION,FRAME_LOCATION,FRAME_SIZE,FRAME_SIZE);
65        mainPanel = new Panel();
66        mainPanel.setBounds(0, 0, FRAME_SIZE, FRAME_SIZE);
67        mainPanel.setBackground(Color.black);
68        mainPanel.setLayout(new GridLayout(2, 1));
69
70        final DraggablePanel dragSource = new DraggablePanel();
71        dragSource.setBackground(Color.yellow);
72        dragSource.setDropTarget(null);
73        mainPanel.add(dragSource);
74
75        Panel dropTarget = new Panel();
76        dropTarget.setBackground(Color.red);
77        DropTarget dt = new DropTarget(dropTarget, new DropTargetAdapter() {
78            @Override public void drop(DropTargetDropEvent dtde) { }
79
80            @Override
81            public void dragEnter(DropTargetDragEvent dtde) {
82                dragEnterCalled.incrementAndGet();
83            }
84        });
85        dropTarget.setDropTarget(dt);
86        mainPanel.add(dropTarget);
87
88        f.add(mainPanel);
89        f.setVisible(true);
90    }
91
92    public static void main(String[] args) throws Throwable {
93        try {
94
95            SwingUtilities.invokeAndWait(new Runnable() {
96                @Override
97                public void run() {
98                    initAndShowUI();
99                }
100            });
101
102            Robot r = new Robot();
103            Util.waitForIdle(r);
104            Point leftCorner = new Point(mainPanel.getLocationOnScreen());
105            leftCorner.translate(5, 5);
106            Point rightCorner = new Point(mainPanel.getLocationOnScreen());
107            rightCorner.translate(mainPanel.getWidth(), mainPanel.getHeight());
108            rightCorner.translate(-5, -5);
109            Util.drag(r, leftCorner, rightCorner, InputEvent.BUTTON1_MASK);
110            Util.waitForIdle(r);
111
112            int called = dragEnterCalled.get();
113            if (called != 1) {
114                throw new RuntimeException("Failed. Drag enter called " + called + " times. Expected 1" );
115            }
116        } finally {
117            if (f != null) {
118                f.dispose();
119            }
120        }
121    }
122
123    private static class DraggablePanel extends Panel implements DragGestureListener {
124
125        public DraggablePanel() {
126            (new DragSource()).createDefaultDragGestureRecognizer(this, DnDConstants.ACTION_COPY, this);
127        }
128
129        @Override
130        public void dragGestureRecognized(DragGestureEvent dge) {
131            dge.startDrag(Cursor.getDefaultCursor(), new StringSelection("test"));
132        }
133    }
134}
135