org.argeo.eclipse.ui.rap/src/org/argeo/eclipse/ui/specific/FileDropAdapter.java

   1 package org.argeo.eclipse.ui.specific;
   2
   3 import java.io.IOException;
   4 import java.io.InputStream;
   5
   6 import org.eclipse.rap.fileupload.FileDetails;
   7 import org.eclipse.rap.fileupload.FileUploadHandler;
   8 import org.eclipse.rap.fileupload.FileUploadReceiver;
   9 import org.eclipse.rap.rwt.RWT;
  10 import org.eclipse.rap.rwt.client.ClientFile;
  11 import org.eclipse.rap.rwt.client.service.ClientFileUploader;
  12 import org.eclipse.rap.rwt.dnd.ClientFileTransfer;
  13 import org.eclipse.swt.dnd.DND;
  14 import org.eclipse.swt.dnd.DropTarget;
  15 import org.eclipse.swt.dnd.DropTargetAdapter;
  16 import org.eclipse.swt.dnd.DropTargetEvent;
  17 import org.eclipse.swt.dnd.Transfer;
  18 import org.eclipse.swt.widgets.Control;
  19
  20 /** Configures a {@link Control} to receive files drop from the client OS. */
  21 public class FileDropAdapter {
  22
  23         public void prepareDropTarget(Control control, DropTarget dropTarget) {
  24                 dropTarget.setTransfer(new Transfer[] { ClientFileTransfer.getInstance() });
  25                 dropTarget.addDropListener(new DropTargetAdapter() {
  26                         private static final long serialVersionUID = 5361645765549463168L;
  27
  28                         @Override
  29                         public void dropAccept(DropTargetEvent event) {
  30                                 if (!ClientFileTransfer.getInstance().isSupportedType(event.currentDataType)) {
  31                                         event.detail = DND.DROP_NONE;
  32                                 }
  33                         }
  34
  35                         @Override
  36                         public void drop(DropTargetEvent event) {
  37                                 handleFileDrop(control, event);
  38                         }
  39                 });
  40         }
  41
  42         public void handleFileDrop(Control control, DropTargetEvent event) {
  43                 ClientFile[] clientFiles = (ClientFile[]) event.data;
  44                 ClientFileUploader service = RWT.getClient().getService(ClientFileUploader.class);
  45 //              DiskFileUploadReceiver receiver = new DiskFileUploadReceiver();
  46                 FileUploadReceiver receiver = new FileUploadReceiver() {
  47
  48                         @Override
  49                         public void receive(InputStream stream, FileDetails details) throws IOException {
  50                                 control.getDisplay().syncExec(() -> {
  51                                         try {
  52                                                 processUpload(stream, details.getFileName(), details.getContentType());
  53                                         } catch (IOException e) {
  54                                                 throw new IllegalStateException("Cannot process upload of " + details.getFileName(), e);
  55                                         }
  56                                 });
  57                         }
  58                 };
  59                 FileUploadHandler handler = new FileUploadHandler(receiver);
  60 //                  handler.setMaxFileSize( sizeLimit );
  61 //                  handler.setUploadTimeLimit( timeLimit );
  62                 service.submit(handler.getUploadUrl(), clientFiles);
  63 //              for (File file : receiver.getTargetFiles()) {
  64 //                      paths.add(file.toPath());
  65 //              }
  66         }
  67
  68         /** Executed in UI thread */
  69         protected void processUpload(InputStream in, String fileName, String contentType) throws IOException {
  70
  71         }
  72
  73 }