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.
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   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.
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  23 
  24 /**
  25  * @test
  26  * @bug 8024163
  27  * @summary Checks the dragEnter event is correctly generated
  28  * @library ../../regtesthelpers
  29  * @build Util
  30  * @compile ExtraDragEnterTest.java
  31  * @run main/othervm ExtraDragEnterTest
  32  * @author Petr Pchelko
  33  */
  34 
  35 import test.java.awt.regtesthelpers.Util;
  36 
  37 import javax.swing.*;
  38 import java.awt.*;
  39 import java.awt.datatransfer.StringSelection;
  40 import java.awt.dnd.DnDConstants;
  41 import java.awt.dnd.DragGestureEvent;
  42 import java.awt.dnd.DragGestureListener;
  43 import java.awt.dnd.DragSource;
  44 import java.awt.dnd.DropTarget;
  45 import java.awt.dnd.DropTargetAdapter;
  46 import java.awt.dnd.DropTargetDragEvent;
  47 import java.awt.dnd.DropTargetDropEvent;
  48 import java.awt.event.InputEvent;
  49 import java.util.concurrent.atomic.AtomicInteger;
  50 
  51 public class ExtraDragEnterTest {
  52 
  53     private static final int FRAME_SIZE = 100;
  54     private static final int FRAME_LOCATION = 100;
  55 
  56     private static AtomicInteger dragEnterCalled = new AtomicInteger(0);
  57 
  58     private static volatile Panel mainPanel;
  59     private static volatile Frame f;
  60 
  61     private static void initAndShowUI() {
  62         f = new Frame("Test frame");
  63         f.setBounds(FRAME_LOCATION,FRAME_LOCATION,FRAME_SIZE,FRAME_SIZE);
  64         mainPanel = new Panel();
  65         mainPanel.setBounds(0, 0, FRAME_SIZE, FRAME_SIZE);
  66         mainPanel.setBackground(Color.black);
  67         mainPanel.setLayout(new GridLayout(2, 1));
  68 
  69         final DraggablePanel dragSource = new DraggablePanel();
  70         dragSource.setBackground(Color.yellow);
  71         dragSource.setDropTarget(null);
  72         mainPanel.add(dragSource);
  73 
  74         Panel dropTarget = new Panel();
  75         dropTarget.setBackground(Color.red);
  76         DropTarget dt = new DropTarget(dropTarget, new DropTargetAdapter() {
  77             @Override public void drop(DropTargetDropEvent dtde) { }
  78 
  79             @Override
  80             public void dragEnter(DropTargetDragEvent dtde) {
  81                 dragEnterCalled.incrementAndGet();
  82             }
  83         });
  84         dropTarget.setDropTarget(dt);
  85         mainPanel.add(dropTarget);
  86 
  87         f.add(mainPanel);
  88         f.setVisible(true);
  89     }
  90 
  91     public static void main(String[] args) throws Throwable {
  92         try {
  93 
  94             SwingUtilities.invokeAndWait(new Runnable() {
  95                 @Override
  96                 public void run() {
  97                     initAndShowUI();
  98                 }
  99             });
 100 
 101             Robot r = new Robot();
 102             Util.waitForIdle(r);
 103             Point leftCorner = new Point(mainPanel.getLocationOnScreen());
 104             leftCorner.translate(5, 5);
 105             Point rightCorner = new Point(mainPanel.getLocationOnScreen());
 106             rightCorner.translate(mainPanel.getWidth(), mainPanel.getHeight());
 107             rightCorner.translate(-5, -5);
 108             Util.drag(r, leftCorner, rightCorner, InputEvent.BUTTON1_MASK);
 109             Util.waitForIdle(r);
 110 
 111             int called = dragEnterCalled.get();
 112             if (called != 1) {
 113                 throw new RuntimeException("Failed. Drag enter called " + called + " times. Expected 1" );
 114             }
 115         } finally {
 116             if (f != null) {
 117                 f.dispose();
 118             }
 119         }
 120     }
 121 
 122     private static class DraggablePanel extends Panel implements DragGestureListener {
 123 
 124         public DraggablePanel() {
 125             (new DragSource()).createDefaultDragGestureRecognizer(this, DnDConstants.ACTION_COPY, this);
 126         }
 127 
 128         @Override
 129         public void dragGestureRecognized(DragGestureEvent dge) {
 130             dge.startDrag(Cursor.getDefaultCursor(), new StringSelection("test"));
 131         }
 132     }
 133 }