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test/jdk/java/awt/dnd/ImageTransferTest/ImageTransferTest.java

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   1 /*
   2  * Copyright (c) 2014, 2016, 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 4397404 4720930
  28   @summary tests that images of all supported native image formats are transfered properly
  29   @library ../../../../lib/testlibrary
  30   @library ../../regtesthelpers/process/
  31   @build jdk.testlibrary.OSInfo ProcessResults ProcessCommunicator
  32   @author gas@sparc.spb.su area=Clipboard
  33   @run main ImageTransferTest
  34 */

  35 
  36 import test.java.awt.regtesthelpers.process.ProcessCommunicator;
  37 import test.java.awt.regtesthelpers.process.ProcessResults;
  38 import jdk.testlibrary.OSInfo;
  39 
  40 import java.awt.*;
  41 import java.awt.datatransfer.DataFlavor;
  42 import java.awt.datatransfer.SystemFlavorMap;
  43 import java.awt.datatransfer.Transferable;
  44 import java.awt.datatransfer.UnsupportedFlavorException;
  45 import java.awt.dnd.DnDConstants;
  46 import java.awt.dnd.DragSource;
  47 import java.awt.dnd.DragSourceAdapter;
  48 import java.awt.dnd.DragSourceDropEvent;
  49 import java.awt.dnd.DragSourceListener;
  50 import java.awt.dnd.DropTarget;
  51 import java.awt.dnd.DropTargetAdapter;
  52 import java.awt.dnd.DropTargetDropEvent;
  53 import java.awt.event.InputEvent;
  54 import java.awt.image.BufferedImage;
  55 import java.awt.image.MemoryImageSource;
  56 import java.util.stream.Stream;
  57 
  58 public class ImageTransferTest {
  59     public static void main(String[] arg) throws Exception {
  60         ImageDragSource ids = new ImageDragSource();


  61         ids.frame.setLocation(100, 100);
  62         ids.frame.setVisible(true);
  63         Util.sync();
  64         String classpath = System.getProperty("java.class.path");
  65         String[] args = new String[ids.formats.length + 4];
  66         args[0] = "200";
  67         args[1] = "100";
  68         args[2] = args[3] = "150";
  69 
  70         System.arraycopy(ids.formats, 0, args, 4, ids.formats.length);
  71         ProcessResults pres = ProcessCommunicator.executeChildProcess(ImageDropTarget.class, classpath, args);



  72 
  73         if (pres.getStdErr() != null && pres.getStdErr().length() > 0) {
  74             System.err.println("========= Child VM System.err ========");
  75             System.err.print(pres.getStdErr());
  76             System.err.println("======================================");
  77         }
  78 
  79         if (pres.getStdOut() != null && pres.getStdOut().length() > 0) {
  80             System.err.println("========= Child VM System.out ========");
  81             System.err.print(pres.getStdOut());
  82             System.err.println("======================================");
  83         }
  84 
  85         boolean failed = false;
  86         String passedFormats = "";
  87         String failedFormats = "";
  88 
  89         for (int i = 0; i < ids.passedArray.length; i++) {
  90             if (ids.passedArray[i]) passedFormats += ids.formats[i] + " ";
  91             else {
  92                 failed = true;
  93                 failedFormats += ids.formats[i] + " ";
  94             }
  95         }
  96 
  97         if (failed) {
  98             throw new RuntimeException("test failed: images in following " +
  99                     "native formats are not transferred properly: " + failedFormats);

 100         } else {
 101             System.err.println("images in following " +
 102                     "native formats are transferred properly: " + passedFormats);
 103         }





 104     }
 105 }
 106 
 107 
 108 class Util {
 109     private static Robot srobot = null;
 110     public static void sync() {
 111         try {
 112             if(srobot == null) {
 113                 srobot = new Robot();
 114             }
 115             srobot.waitForIdle();
 116             Thread.sleep(500);
 117         } catch (Exception e) {
 118             throw new RuntimeException(e);
 119         }
 120     }
 121 }
 122 
 123 abstract class ImageTransferer {


 131         image = createImage();
 132         frame.setSize(100, 100);
 133     }
 134 
 135     private static Image createImage() {
 136         int w = 100;
 137         int h = 100;
 138         int[] pix = new int[w * h];
 139 
 140         int index = 0;
 141         for (int y = 0; y < h; y++) {
 142             for (int x = 0; x < w; x++) {
 143                 int red = 127;
 144                 int green = 127;
 145                 int blue = y > h / 2 ? 127 : 0;
 146                 int alpha = 255;
 147                 if (x < w / 4 && y < h / 4) {
 148                     alpha = 0;
 149                     red = 0;
 150                 }
 151                 pix[index++] = (alpha << 24) | (red << 16) | (green << 8) | blue;

 152             }
 153         }
 154         return Toolkit.getDefaultToolkit().createImage(new MemoryImageSource(w, h, pix, 0, w));

 155     }
 156 
 157 
 158     static String[] retrieveFormatsToTest() {
 159         SystemFlavorMap sfm = (SystemFlavorMap) SystemFlavorMap.getDefaultFlavorMap();
 160         java.util.List<String> ln = sfm.getNativesForFlavor(DataFlavor.imageFlavor);
 161         if (OSInfo.OSType.WINDOWS.equals(OSInfo.getOSType()) && !ln.contains("METAFILEPICT")) {




 162             // for test failing on JDK without this fix
 163             ln.add("METAFILEPICT");
 164         }
 165         return ln.toArray(new String[ln.size()]);
 166     }
 167 
 168     static void leaveFormat(String format) {
 169         SystemFlavorMap sfm = (SystemFlavorMap) SystemFlavorMap.getDefaultFlavorMap();
 170         sfm.setFlavorsForNative(format, new DataFlavor[]{DataFlavor.imageFlavor});


 171         sfm.setNativesForFlavor(DataFlavor.imageFlavor, new String[]{format});
 172     }
 173 
 174 
 175     boolean areImagesIdentical(Image im1, Image im2) {
 176         if (formats[fi].equals("JFIF") || formats[fi].equals("image/jpeg") ||
 177                 formats[fi].equals("GIF") || formats[fi].equals("image/gif")) {
 178             // JFIF and GIF are lossy formats
 179             return true;
 180         }
 181         int[] ib1 = getImageData(im1);
 182         int[] ib2 = getImageData(im2);
 183 
 184         if (ib1.length != ib2.length) {
 185             return false;
 186         }
 187 
 188         if (formats[fi].equals("PNG") ||
 189                 formats[fi].equals("image/png") ||
 190                 formats[fi].equals("image/x-png")) {


 196                             Integer.toHexString(ib2[i]));
 197                     return false;
 198                 }
 199             }
 200         } else {
 201             for (int i = 0; i < ib1.length; i++) {
 202                 if ((ib1[i] & 0x00FFFFFF) != (ib2[i] & 0x00FFFFFF)) {
 203                     System.err.println("different pixels: " +
 204                             Integer.toHexString(ib1[i]) + " " +
 205                             Integer.toHexString(ib2[i]));
 206                     return false;
 207                 }
 208             }
 209         }
 210         return true;
 211     }
 212 
 213     private static int[] getImageData(Image image) {
 214         int width = image.getWidth(null);
 215         int height = image.getHeight(null);
 216         BufferedImage bimage = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);

 217         Graphics2D g2d = bimage.createGraphics();
 218         try {
 219             g2d.drawImage(image, 0, 0, width, height, null);
 220         } finally {
 221             g2d.dispose();
 222         }
 223         return bimage.getRGB(0, 0, width, height, null, 0, width);
 224     }
 225 
 226     public static int sign(int n) {
 227         return n < 0 ? -1 : n == 0 ? 0 : 1;
 228     }
 229 
 230 }
 231 
 232 
 233 class ImageDragSource extends ImageTransferer {
 234     boolean[] passedArray;
 235 
 236     ImageDragSource() {


 244                     leaveFormat(formats[fi]);
 245                 }
 246             }
 247         };
 248 
 249         new DragSource().createDefaultDragGestureRecognizer(frame,
 250                 DnDConstants.ACTION_COPY,
 251                 dge -> dge.startDrag(null, new ImageSelection(image), dsl));
 252         leaveFormat(formats[fi]);
 253     }
 254 
 255 
 256     void notifyTransferSuccess(boolean status) {
 257         passedArray[fi] = status;
 258     }
 259 }
 260 
 261 
 262 class ImageDropTarget extends ImageTransferer {
 263     private final Robot robot;

 264     private static Point startPoint, endPoint = new Point(250, 150);

 265 
 266     ImageDropTarget() throws AWTException {
 267         DropTargetAdapter dropTargetAdapter = new DropTargetAdapter() {
 268             @Override
 269             public void drop(DropTargetDropEvent dtde) {

 270                 checkImage(dtde);
 271                 startImageDrag();
 272             }
 273         };
 274         new DropTarget(frame, dropTargetAdapter);
 275         robot = new Robot();
 276     }
 277 
 278 
 279     void checkImage(DropTargetDropEvent dtde) {
 280         final Transferable t = dtde.getTransferable();
 281         if (t.isDataFlavorSupported(DataFlavor.imageFlavor)) {
 282             dtde.acceptDrop(DnDConstants.ACTION_COPY);
 283             Image im;
 284             try {
 285                 im = (Image) t.getTransferData(DataFlavor.imageFlavor);
 286                 System.err.println("getTransferData was successful");
 287             } catch (Exception e) {
 288                 System.err.println("Can't getTransferData: " + e);
 289                 dtde.dropComplete(false);
 290                 notifyTransferSuccess(false);
 291                 return;
 292             }
 293 
 294             if (im == null) {
 295                 System.err.println("getTransferData returned null");
 296                 dtde.dropComplete(false);
 297                 notifyTransferSuccess(false);
 298             } else if (areImagesIdentical(image, im)) {
 299                 dtde.dropComplete(true);
 300                 notifyTransferSuccess(true);
 301             } else {
 302                 System.err.println("transferred image is different from initial image");

 303                 dtde.dropComplete(false);
 304                 notifyTransferSuccess(false);
 305             }
 306 
 307         } else {
 308             System.err.println("imageFlavor is not supported by Transferable");
 309             dtde.rejectDrop();
 310             notifyTransferSuccess(false);
 311         }
 312     }
 313 
 314     void startImageDrag() {
 315         leaveFormat(formats[fi]);
 316         new Thread(() -> {
 317             try {
 318                 Thread.sleep(1000);
 319             } catch (InterruptedException e) {



 320                 e.printStackTrace();
 321                 // Exit from the child process
 322                 System.exit(1);
 323             }
 324             robot.mouseMove(startPoint.x, startPoint.y);
 325             robot.mousePress(InputEvent.BUTTON1_MASK);
 326             for (Point p = new Point(startPoint); !p.equals(endPoint);
 327                  p.translate(sign(endPoint.x - p.x), sign(endPoint.y - p.y))) {


 328                 robot.mouseMove(p.x, p.y);
 329                 try {
 330                     Thread.sleep(50);
 331                 } catch (InterruptedException e) {
 332                     e.printStackTrace();
 333                 }
 334             }
 335 
 336             robot.mouseRelease(InputEvent.BUTTON1_MASK);
 337         }).start();
 338     }
 339 
 340     void notifyTransferSuccess(boolean status) {
 341         if (status) {
 342             System.err.println("format passed: " + formats[fi]);
 343         } else {



 344             System.err.println("format failed: " + formats[fi]);
 345             System.exit(1);
 346         }
 347         if (fi < formats.length - 1) {
 348             leaveFormat(formats[++fi]);
 349         } else {
 350             new Thread(() -> {
 351                 try {
 352                     Thread.sleep(500);
 353                 } catch (InterruptedException e) {
 354                     e.printStackTrace();
 355                 }
 356                 System.exit(0);
 357             }).start();
 358         }
 359     }
 360 
 361 
 362     public static void main(String[] args) {

 363         try {
 364             ImageDropTarget idt = new ImageDropTarget();
 365 
 366             int x = Integer.parseInt(args[0]);
 367             int y = Integer.parseInt(args[1]);
 368             startPoint = new Point(Integer.parseInt(args[2]), Integer.parseInt(args[3]));

 369 
 370             idt.formats = new String[args.length - 4];
 371             System.arraycopy(args, 4, idt.formats, 0, args.length - 4);
 372             leaveFormat(idt.formats[0]);
 373 
 374             idt.frame.setLocation(x, y);
 375             idt.frame.setVisible(true);
 376             Util.sync();
 377 
 378             idt.startImageDrag();













 379         } catch (Throwable e) {



 380             e.printStackTrace();
 381             System.exit(1);
 382         }
 383     }
 384 
 385 }
 386 
 387 
 388 class ImageSelection implements Transferable {
 389     private static final int IMAGE = 0;
 390     private static final DataFlavor[] flavors = {DataFlavor.imageFlavor};
 391     private Image data;
 392 
 393     public ImageSelection(Image data) {
 394         this.data = data;
 395     }
 396 
 397     @Override
 398     public DataFlavor[] getTransferDataFlavors() {
 399         // returning flavors itself would allow client code to modify
 400         // our internal behavior
 401         return flavors.clone();
 402     }
 403 
 404     @Override
 405     public boolean isDataFlavorSupported(DataFlavor flavor) {
 406         return Stream.of(flavor).anyMatch(flavor::equals);
 407     }
 408 
 409     @Override
 410     public Object getTransferData(DataFlavor flavor) throws UnsupportedFlavorException {


 411         if (flavor.equals(flavors[IMAGE])) {
 412             return data;
 413         } else {
 414             throw new UnsupportedFlavorException(flavor);
 415         }
 416     }
 417 }

   1 /*
   2  * Copyright (c) 2014, 2018, 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 4397404 4720930 8197926
  28  * @summary tests that images of all supported native image formats are
  29  * transferred properly
  30  * @library ../../../../lib/testlibrary
  31  * @library ../../regtesthelpers/process/
  32  * @build jdk.testlibrary.OSInfo ProcessResults ProcessCommunicator
  33  * @author gas@sparc.spb.su area=Clipboard
  34  * @run main/timeout=240 ImageTransferTest
  35  */
  36 
  37 import test.java.awt.regtesthelpers.process.ProcessCommunicator;
  38 import test.java.awt.regtesthelpers.process.ProcessResults;
  39 import jdk.testlibrary.OSInfo;
  40 
  41 import java.awt.*;
  42 import java.awt.datatransfer.DataFlavor;
  43 import java.awt.datatransfer.SystemFlavorMap;
  44 import java.awt.datatransfer.Transferable;
  45 import java.awt.datatransfer.UnsupportedFlavorException;
  46 import java.awt.dnd.DnDConstants;
  47 import java.awt.dnd.DragSource;
  48 import java.awt.dnd.DragSourceAdapter;
  49 import java.awt.dnd.DragSourceDropEvent;
  50 import java.awt.dnd.DragSourceListener;
  51 import java.awt.dnd.DropTarget;
  52 import java.awt.dnd.DropTargetAdapter;
  53 import java.awt.dnd.DropTargetDropEvent;
  54 import java.awt.event.InputEvent;
  55 import java.awt.image.BufferedImage;
  56 import java.awt.image.MemoryImageSource;
  57 import java.util.stream.Stream;
  58 
  59 public class ImageTransferTest {
  60     public static void main(String[] arg) throws Exception {
  61         ImageDragSource ids = new ImageDragSource();
  62         try {
  63             ids.frame.setUndecorated(true);
  64             ids.frame.setLocation(100, 100);
  65             ids.frame.setVisible(true);
  66             Util.sync();
  67             String classpath = System.getProperty("java.class.path");
  68             String[] args = new String[ids.formats.length + 4];
  69             args[0] = "200";
  70             args[1] = "100";
  71             args[2] = args[3] = "150";
  72 
  73             System.arraycopy(ids.formats, 0, args, 4, ids.formats.length);
  74             String scale = System.getProperty("sun.java2d.uiScale");
  75             ProcessResults pres = ProcessCommunicator.
  76                     executeChildProcess(ImageDropTarget.class, classpath +
  77                     " -Dsun.java2d.uiScale=" + scale, args);
  78 
  79             if (pres.getStdErr() != null && pres.getStdErr().length() > 0) {
  80                 System.err.println("========= Child VM System.err ========");
  81                 System.err.print(pres.getStdErr());
  82                 System.err.println("======================================");
  83             }
  84 
  85             if (pres.getStdOut() != null && pres.getStdOut().length() > 0) {
  86                 System.err.println("========= Child VM System.out ========");
  87                 System.err.print(pres.getStdOut());
  88                 System.err.println("======================================");
  89             }
  90 
  91             boolean failed = false;
  92             String passedFormats = "";
  93             String failedFormats = "";
  94 
  95             for (int i = 0; i < ids.passedArray.length; i++) {
  96                 if (ids.passedArray[i]) passedFormats += ids.formats[i] + " ";
  97                 else {
  98                     failed = true;
  99                     failedFormats += ids.formats[i] + " ";
 100                 }
 101             }
 102 
 103             if (failed) {
 104                 throw new RuntimeException("test failed: images in following " +
 105                 "native formats are not transferred properly: " +
 106                 failedFormats);
 107             } else {
 108                 System.err.println("images in following " +
 109                 "native formats are transferred properly: " + passedFormats);
 110             }
 111         } finally {
 112             if (ids.frame != null) {
 113                 ids.frame.dispose();
 114             }
 115         }
 116     }
 117 }
 118 
 119 
 120 class Util {
 121     private static Robot srobot = null;
 122     public static void sync() {
 123         try {
 124             if(srobot == null) {
 125                 srobot = new Robot();
 126             }
 127             srobot.waitForIdle();
 128             Thread.sleep(500);
 129         } catch (Exception e) {
 130             throw new RuntimeException(e);
 131         }
 132     }
 133 }
 134 
 135 abstract class ImageTransferer {


 143         image = createImage();
 144         frame.setSize(100, 100);
 145     }
 146 
 147     private static Image createImage() {
 148         int w = 100;
 149         int h = 100;
 150         int[] pix = new int[w * h];
 151 
 152         int index = 0;
 153         for (int y = 0; y < h; y++) {
 154             for (int x = 0; x < w; x++) {
 155                 int red = 127;
 156                 int green = 127;
 157                 int blue = y > h / 2 ? 127 : 0;
 158                 int alpha = 255;
 159                 if (x < w / 4 && y < h / 4) {
 160                     alpha = 0;
 161                     red = 0;
 162                 }
 163                 pix[index++] =
 164                         (alpha << 24) | (red << 16) | (green << 8) | blue;
 165             }
 166         }
 167         return Toolkit.getDefaultToolkit().
 168                 createImage(new MemoryImageSource(w, h, pix, 0, w));
 169     }
 170 
 171 
 172     static String[] retrieveFormatsToTest() {
 173         SystemFlavorMap sfm =
 174                 (SystemFlavorMap) SystemFlavorMap.getDefaultFlavorMap();
 175         java.util.List<String> ln =
 176                 sfm.getNativesForFlavor(DataFlavor.imageFlavor);
 177         if (OSInfo.OSType.WINDOWS.equals(OSInfo.getOSType()) &&
 178             !ln.contains("METAFILEPICT"))
 179         {
 180             // for test failing on JDK without this fix
 181             ln.add("METAFILEPICT");
 182         }
 183         return ln.toArray(new String[ln.size()]);
 184     }
 185 
 186     static void leaveFormat(String format) {
 187         SystemFlavorMap sfm =
 188                 (SystemFlavorMap) SystemFlavorMap.getDefaultFlavorMap();
 189         sfm.setFlavorsForNative(format,
 190                                 new DataFlavor[]{DataFlavor.imageFlavor});
 191         sfm.setNativesForFlavor(DataFlavor.imageFlavor, new String[]{format});
 192     }
 193 
 194 
 195     boolean areImagesIdentical(Image im1, Image im2) {
 196         if (formats[fi].equals("JFIF") || formats[fi].equals("image/jpeg") ||
 197         formats[fi].equals("GIF") || formats[fi].equals("image/gif")) {
 198             // JFIF and GIF are lossy formats
 199             return true;
 200         }
 201         int[] ib1 = getImageData(im1);
 202         int[] ib2 = getImageData(im2);
 203 
 204         if (ib1.length != ib2.length) {
 205             return false;
 206         }
 207 
 208         if (formats[fi].equals("PNG") ||
 209         formats[fi].equals("image/png") ||
 210         formats[fi].equals("image/x-png")) {


 216                     Integer.toHexString(ib2[i]));
 217                     return false;
 218                 }
 219             }
 220         } else {
 221             for (int i = 0; i < ib1.length; i++) {
 222                 if ((ib1[i] & 0x00FFFFFF) != (ib2[i] & 0x00FFFFFF)) {
 223                     System.err.println("different pixels: " +
 224                     Integer.toHexString(ib1[i]) + " " +
 225                     Integer.toHexString(ib2[i]));
 226                     return false;
 227                 }
 228             }
 229         }
 230         return true;
 231     }
 232 
 233     private static int[] getImageData(Image image) {
 234         int width = image.getWidth(null);
 235         int height = image.getHeight(null);
 236         BufferedImage bimage =
 237                 new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
 238         Graphics2D g2d = bimage.createGraphics();
 239         try {
 240             g2d.drawImage(image, 0, 0, width, height, null);
 241         } finally {
 242             g2d.dispose();
 243         }
 244         return bimage.getRGB(0, 0, width, height, null, 0, width);
 245     }
 246 
 247     public static int sign(int n) {
 248         return n < 0 ? -1 : n == 0 ? 0 : 1;
 249     }
 250 
 251 }
 252 
 253 
 254 class ImageDragSource extends ImageTransferer {
 255     boolean[] passedArray;
 256 
 257     ImageDragSource() {


 265                     leaveFormat(formats[fi]);
 266                 }
 267             }
 268         };
 269 
 270         new DragSource().createDefaultDragGestureRecognizer(frame,
 271         DnDConstants.ACTION_COPY,
 272         dge -> dge.startDrag(null, new ImageSelection(image), dsl));
 273         leaveFormat(formats[fi]);
 274     }
 275 
 276 
 277     void notifyTransferSuccess(boolean status) {
 278         passedArray[fi] = status;
 279     }
 280 }
 281 
 282 
 283 class ImageDropTarget extends ImageTransferer {
 284     private final Robot robot;
 285     private static ImageDropTarget idt;
 286     private static Point startPoint, endPoint = new Point(250, 150);
 287     private static int dropCount = 0;
 288 
 289     ImageDropTarget() throws AWTException {
 290         DropTargetAdapter dropTargetAdapter = new DropTargetAdapter() {
 291             @Override
 292             public void drop(DropTargetDropEvent dtde) {
 293                 dropCount++;
 294                 checkImage(dtde);
 295                 startImageDrag();
 296             }
 297         };
 298         new DropTarget(frame, dropTargetAdapter);
 299         robot = new Robot();
 300     }
 301 
 302 
 303     void checkImage(DropTargetDropEvent dtde) {
 304         final Transferable t = dtde.getTransferable();
 305         if (t.isDataFlavorSupported(DataFlavor.imageFlavor)) {
 306             dtde.acceptDrop(DnDConstants.ACTION_COPY);
 307             Image im;
 308             try {
 309                 im = (Image) t.getTransferData(DataFlavor.imageFlavor);
 310                 System.err.println("getTransferData was successful");
 311             } catch (Exception e) {
 312                 System.err.println("Can't getTransferData: " + e);
 313                 dtde.dropComplete(false);
 314                 notifyTransferSuccess(false);
 315                 return;
 316             }
 317 
 318             if (im == null) {
 319                 System.err.println("getTransferData returned null");
 320                 dtde.dropComplete(false);
 321                 notifyTransferSuccess(false);
 322             } else if (areImagesIdentical(image, im)) {
 323                 dtde.dropComplete(true);
 324                 notifyTransferSuccess(true);
 325             } else {
 326                 System.err.println("transferred image is different from" +
 327                         " initial image");
 328                 dtde.dropComplete(false);
 329                 notifyTransferSuccess(false);
 330             }
 331 
 332         } else {
 333             System.err.println("imageFlavor is not supported by Transferable");
 334             dtde.rejectDrop();
 335             notifyTransferSuccess(false);
 336         }
 337     }
 338 
 339     void startImageDrag() {
 340         leaveFormat(formats[fi]);
 341         new Thread(() -> {
 342             try {
 343                 Thread.sleep(1000);
 344             } catch (InterruptedException e) {
 345                 if (idt.frame != null) {
 346                     idt.frame.dispose();
 347                 }
 348                 e.printStackTrace();
 349                 // Exit from the child process
 350                 System.exit(1);
 351             }
 352             robot.mouseMove(startPoint.x, startPoint.y);
 353             robot.mousePress(InputEvent.BUTTON1_MASK);
 354             for (Point p = new Point(startPoint); !p.equals(endPoint);
 355                  p.translate(sign(endPoint.x - p.x),
 356                  sign(endPoint.y - p.y)))
 357             {
 358                 robot.mouseMove(p.x, p.y);
 359                 try {
 360                     Thread.sleep(50);
 361                 } catch (InterruptedException e) {
 362                     e.printStackTrace();
 363                 }
 364             }
 365 
 366             robot.mouseRelease(InputEvent.BUTTON1_MASK);
 367         }).start();
 368     }
 369 
 370     void notifyTransferSuccess(boolean status) {
 371         if (status) {
 372             System.err.println("format passed: " + formats[fi]);
 373         } else {
 374             if (idt.frame != null) {
 375                 idt.frame.dispose();
 376             }
 377             System.err.println("format failed: " + formats[fi]);
 378             System.exit(1);
 379         }
 380         if (fi < formats.length - 1) {
 381             leaveFormat(formats[++fi]);
 382         } else {
 383             new Thread(() -> {
 384                 try {
 385                     Thread.sleep(500);
 386                 } catch (InterruptedException e) {
 387                     e.printStackTrace();
 388                 }
 389                 System.exit(0);
 390             }).start();
 391         }
 392     }
 393 
 394 
 395     public static void main(String[] args) throws Exception {
 396         idt = new ImageDropTarget();
 397         try {
 398             idt.frame.setUndecorated(true);
 399 
 400             int x = Integer.parseInt(args[0]);
 401             int y = Integer.parseInt(args[1]);
 402             startPoint = new Point(Integer.parseInt(args[2]),
 403                                    Integer.parseInt(args[3]));
 404 
 405             idt.formats = new String[args.length - 4];
 406             System.arraycopy(args, 4, idt.formats, 0, args.length - 4);
 407             leaveFormat(idt.formats[0]);
 408 
 409             idt.frame.setLocation(x, y);
 410             idt.frame.setVisible(true);
 411             Util.sync();
 412 
 413             idt.startImageDrag();
 414             new Thread(() -> {
 415                 try {
 416                     Thread.sleep(120000);
 417                 } catch (InterruptedException e) {
 418                     e.printStackTrace();
 419                 }
 420                 if (dropCount == 0) {
 421                     if (idt.frame != null) {
 422                         idt.frame.dispose();
 423                     }
 424                     System.exit(1);
 425                 }
 426             }).start();
 427         } catch (Throwable e) {
 428             if (idt.frame != null) {
 429                 idt.frame.dispose();
 430             }
 431             e.printStackTrace();
 432             System.exit(1);
 433         }
 434     }
 435 
 436 }
 437 
 438 
 439 class ImageSelection implements Transferable {
 440     private static final int IMAGE = 0;
 441     private static final DataFlavor[] flavors = {DataFlavor.imageFlavor};
 442     private Image data;
 443 
 444     public ImageSelection(Image data) {
 445         this.data = data;
 446     }
 447 
 448     @Override
 449     public DataFlavor[] getTransferDataFlavors() {
 450         // returning flavors itself would allow client code to modify
 451         // our internal behavior
 452         return flavors.clone();
 453     }
 454 
 455     @Override
 456     public boolean isDataFlavorSupported(DataFlavor flavor) {
 457         return Stream.of(flavor).anyMatch(flavor::equals);
 458     }
 459 
 460     @Override
 461     public Object getTransferData(DataFlavor flavor)
 462             throws UnsupportedFlavorException
 463     {
 464         if (flavor.equals(flavors[IMAGE])) {
 465             return data;
 466         } else {
 467             throw new UnsupportedFlavorException(flavor);
 468         }
 469     }
 470 }
 471 
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