javafx.scene.input.DragEvent#getDragboard ( )源码实例Demo

/**
 * @param event The {@link DragEvent} containing the dragged data.
 * @param selection_tracker Used to get the grid steps from its model to be
 *            used in offsetting multiple widgets.
 * @param widgets The container of the created widgets.
 */
private static void installWidgetsFromString (
    final DragEvent event,
    final SelectedWidgetUITracker selection_tracker,
    final List<Widget> widgets
) {

    final Dragboard db = event.getDragboard();
    final String xmlOrText = db.getString();

    try {
        widgets.addAll(ModelReader.parseXML(xmlOrText).getChildren());
    } catch ( Exception ex ) {
        installWidgetsFromString(event, xmlOrText, selection_tracker, widgets);
    }

}
 

/**
 * Handle dropped files to editor.
 */
@FxThread
private void dragDropped(@NotNull DragEvent dragEvent) {

    var dragboard = dragEvent.getDragboard();
    var files = ClassUtils.<List<File>>unsafeCast(dragboard.getContent(DataFormat.FILES));

    if (files == null || files.size() != 1) {
        return;
    }

    var file = files.get(0);
    if (!canAccept(file)) {
        return;
    }

    handleFile(file);
}
 

/**
 * Handle drag over.
 */
@FxThread
private void dragOver(@NotNull DragEvent dragEvent) {

    var dragboard = dragEvent.getDragboard();
    var files = ClassUtils.<List<File>>unsafeCast(dragboard.getContent(DataFormat.FILES));

    if (files == null || files.size() != 1) {
        return;
    }

    var file = files.get(0);
    if (!canAccept(file)) {
        return;
    }

    var transferModes = dragboard.getTransferModes();
    var isCopy = transferModes.contains(TransferMode.COPY);

    dragEvent.acceptTransferModes(isCopy ? TransferMode.COPY : TransferMode.MOVE);
    dragEvent.consume();
}
 

/**
 * Handle drag over events.
 *
 * @param dragEvent the drag over event.
 */
@FxThread
private void handleDragOverEvent(@NotNull DragEvent dragEvent) {

    var dragboard = dragEvent.getDragboard();
    var files = EditorUtil.getFiles(dragboard);
    if (files.size() != 1) {
        return;
    }

    var file = files.get(0);

    if (!file.getName().endsWith(FileExtensions.JME_MATERIAL)) {
        return;
    }

    var transferModes = dragboard.getTransferModes();
    var isCopy = transferModes.contains(TransferMode.COPY);

    dragEvent.acceptTransferModes(isCopy ? TransferMode.COPY : TransferMode.MOVE);
    dragEvent.consume();
}
 

@FXML
public void songPathDragDropped(final DragEvent ev) {
	Dragboard db = ev.getDragboard();
	if (db.hasFiles()) {
		for (File f : db.getFiles()) {
			if (f.isDirectory()) {
				final String defaultPath = new File(".").getAbsoluteFile().getParent() + File.separatorChar;;
				String targetPath = f.getAbsolutePath();
				if(targetPath.startsWith(defaultPath)) {
					targetPath = f.getAbsolutePath().substring(defaultPath.length());
				}
				boolean unique = true;
				for (String path : bmsroot.getItems()) {
					if (path.equals(targetPath) || targetPath.startsWith(path + File.separatorChar)) {
						unique = false;
						break;
					}
				}
				if (unique) {
					bmsroot.getItems().add(targetPath);
					main.loadBMSPath(targetPath);
				}
			}
		}
	}
}
 

private EventHandler<DragEvent> createOnDragDroppedHandler()
{
	return new EventHandler<DragEvent>() 
   	{
   		public void handle(DragEvent pEvent)
   		{
   			Dragboard db = pEvent.getDragboard();
   			boolean success = false;
   			if(db.hasString()) 
   			{
   				CardTransfer transfer = new CardTransfer(pEvent.getDragboard().getString());
   				GameModel.instance().getCardMove(transfer.getTop(), aIndex).perform();
   				success = true;
   			}
   			pEvent.setDropCompleted(success);
   			pEvent.consume();
   		}
   	};
}
 

private EventHandler<DragEvent> createDragDroppedHandler(final ImageView pImageView, final Card pCard)
{
	return new EventHandler<DragEvent>() 
	{
		@Override
		public void handle(DragEvent pEvent)
		{
			Dragboard db = pEvent.getDragboard();
			boolean success = false;
			if(db.hasString()) 
			{
				GameModel.instance().getCardMove(new CardTransfer(db.getString()).getTop(), aIndex).perform(); 
				success = true;
			}

			pEvent.setDropCompleted(success);

			pEvent.consume();
		}
	};
}
 

private void onDragDropped(DragEvent event) {
	Dragboard db = event.getDragboard();
	if (db.hasFiles()) {
		// drop files (e.g. from project file tree)
		List<File> files = db.getFiles();
		if (!files.isEmpty())
			smartEdit.insertLinkOrImage(dragCaret.getPosition(), files.get(0).toPath());
	} else if (db.hasString()) {
		// drop text
		String newText = db.getString();
		int insertPosition = dragCaret.getPosition();
		SmartEdit.insertText(textArea, insertPosition, newText);
		SmartEdit.selectRange(textArea, insertPosition, insertPosition + newText.length());
	}

	textArea.requestFocus();

	event.setDropCompleted(true);
	event.consume();
}
 

/**
 * The method activateSetOnDragOver controlling what happens when something is dragged over.
 * Implemented activateSetOnDragOver to accept when files are dragged over it.
 * @param event - DragEvent
 */
public static void activateSetOnDragOver(DragEvent event){
  Dragboard dragBoard = event.getDragboard();
  if (dragBoard.hasFiles()) {
    event.acceptTransferModes(TransferMode.COPY);
  } else {
    event.consume();
  }
}
 

/**
 * The method activateSetOnDragDropped controlling what happens when something is dropped on window.
 * Implemented activateSetOnDragDropped to select the module according to the dropped file type and open dropped file
 * @param event - DragEvent
 */

public static void activateSetOnDragDropped(DragEvent event){
  Dragboard dragboard = event.getDragboard();
  boolean hasFileDropped = false;
  if (dragboard.hasFiles()) {
    hasFileDropped = true;
    for (File selectedFile:dragboard.getFiles()) {

      final String extension = FilenameUtils.getExtension(selectedFile.getName());
      String[] rawDataFile = {"cdf","nc","mzData","mzML","mzXML","raw"};
      final Boolean isRawDataFile = Arrays.asList(rawDataFile).contains(extension);
      final Boolean isMZmineProject = extension.equals("mzmine");

      Class<? extends MZmineRunnableModule> moduleJavaClass = null;
      if(isMZmineProject)
      {
        moduleJavaClass = ProjectLoadModule.class;
      } else if(isRawDataFile){
        moduleJavaClass = RawDataImportModule.class;
      }

      if(moduleJavaClass != null){
        ParameterSet moduleParameters =
                MZmineCore.getConfiguration().getModuleParameters(moduleJavaClass);
        if(isMZmineProject){
          moduleParameters.getParameter(projectFile).setValue(selectedFile);
        } else if (isRawDataFile){
          File fileArray[] = { selectedFile };
          moduleParameters.getParameter(fileNames).setValue(fileArray);
        }
        ParameterSet parametersCopy = moduleParameters.cloneParameterSet();
        MZmineCore.runMZmineModule(moduleJavaClass, parametersCopy);
      }
    }
  }
  event.setDropCompleted(hasFileDropped);
  event.consume();
}
 

private void onDragDropped(DragEvent e) {
	Dragboard db = e.getDragboard();
	if (db.hasContent(CLIPBOARD_DATAFORMAT)) {
		// this treecell receives a foreign drop
		// get content and insert into this tag, before this tag or after this tag
		// and remove dropped tag from old location

		// we also don't want to do anything if the tag is dropped onto itself or if the target is invalid
		if (getTreeItem() != null && dragboardContent != getTreeItem() && dropTarget != null) {
			((NBTTreeItem) dropTarget).moveHere(dropIndex, (NBTTreeItem) dragboardContent, getTreeView());
		}
		dragboardContent = null;
	}
}
 

private void onDragDone(DragEvent e) {
	Dragboard db = e.getDragboard();
	if (db.hasContent(CLIPBOARD_DATAFORMAT)) {
		dragboardContent = null;
	}

	if (dropTargetCell != null) {
		dropTargetCell.setInsertCssClass("drop-target", null);
	}
	setInsertParentCss(false);
}
 

protected void handleDrop(DragEvent event) {
    Dragboard db = event.getDragboard();
    if(db.hasContent(DataFormat.PLAIN_TEXT)) {
    	String val = (String) db.getContent(DataFormat.PLAIN_TEXT);
    	((TextField)event.getSource()).setText(val);
    	event.consume();
    }
}
 

public void onDragOverLinkFile(DragEvent event){
    Dragboard db = event.getDragboard();
    if (db.hasFiles()) {
        event.acceptTransferModes(TransferMode.LINK);
    } else {
        event.consume();
    }
}
 

public void onDragDroppedHandleFiles(DragEvent event){
    Dragboard db = event.getDragboard();
    boolean success = false;
    if (db.hasFiles()) {
        success = true;
        for (File file : db.getFiles()) {
            showManifest(file);
            break;
        }
    }
    event.setDropCompleted(success);
    event.consume();
}
 

@FXML
public void onSongPathDragOver(DragEvent ev) {
	Dragboard db = ev.getDragboard();
	if (db.hasFiles()) {
		ev.acceptTransferModes(TransferMode.COPY_OR_MOVE);
	}
	ev.consume();
}
 

private void onDragOver(DragEvent event) {
	// check whether we can accept a drop
	Dragboard db = event.getDragboard();
	if (db.hasString() || db.hasFiles())
		event.acceptTransferModes(TransferMode.COPY);

	// move drag caret to mouse location
	if (event.isAccepted()) {
		CharacterHit hit = textArea.hit(event.getX(), event.getY());
		dragCaret.moveTo(hit.getInsertionIndex());
	}

	event.consume();
}