Examples of javax.swing.TransferHandler$TransferSupport

javax.swing.TransferHandler
This class encapsulates all relevant details of a clipboard or drag and drop transfer, and also allows for customizing aspects of the drag and drop experience.
The main purpose of this class is to provide the information needed by a developer to determine the suitability of a transfer or to import the data contained within. But it also doubles as a controller for customizing properties during drag and drop, such as whether or not to show the drop location, and which drop action to use.
Developers typically need not create instances of this class. Instead, they are something provided by the DnD implementation to certain methods in TransferHandler. @see #canImport(TransferHandler.TransferSupport) @see #importData(TransferHandler.TransferSupport) @since 1.6

    protected void startDragging(MouseEvent event) {
      isDragging = true;
      if (graph.isDragEnabled()) {
        int action = (event.isControlDown() && graph.isCloneable()) ? TransferHandler.COPY
            : TransferHandler.MOVE;
        TransferHandler th = graph.getTransferHandler();
        setInsertionLocation(event.getPoint());
        try {
          th.exportAsDrag(graph, event, action);
        } catch (Exception ex) {
          // Ignore
        }
      }
    }

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   * Invoked as part from the boilerplate install block. This installs the
   * listeners from BasicGraphUI in the graph.
   */
  protected void installListeners() {
    // Install Local Handlers
    TransferHandler th = graph.getTransferHandler();
    if (th == null || th instanceof UIResource) {
      defaultTransferHandler = createTransferHandler();
      graph.setTransferHandler(defaultTransferHandler);
    }
    if (graphLayoutCache != null) {

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    graphSelectionListener = null;
  }


  protected void uninstallListeners() {
    // Uninstall Handlers
    TransferHandler th = graph.getTransferHandler();
    if (th == defaultTransferHandler)
      graph.setTransferHandler(null);
    if (graphLayoutCacheListener != null)
      graphLayoutCache
          .removeGraphLayoutCacheListener(graphLayoutCacheListener);

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    }
    return selfInstance;
  }
    public void mousePressed(MouseEvent e) {
        JComponent c = (JComponent)e.getSource();
        TransferHandler handler = c.getTransferHandler();
        handler.exportAsDrag(c, e, TransferHandler.COPY);
    }

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    @Override
    public void dragEnter(DropTargetDragEvent e) {
        DataFlavor[] flavors = e.getCurrentDataFlavors();


        JComponent c = (JComponent)e.getDropTargetContext().getComponent();
        TransferHandler importer = c.getTransferHandler();


        if (importer != null && importer.canImport(c, flavors)) {
            canImport = true;
        } else {
            canImport = false;
        }

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    @Override
    public void drop(DropTargetDropEvent e) {
        int dropAction = e.getDropAction();


        JComponent c = (JComponent)e.getDropTargetContext().getComponent();
        TransferHandler importer = c.getTransferHandler();


        if (canImport && importer != null && actionSupported(dropAction) && isDropable(e.getSource())) {
            e.acceptDrop(dropAction);


            try {

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    }
    return selfInstance;
  }
    public void mousePressed(MouseEvent e) {
        JComponent c = (JComponent)e.getSource();
        TransferHandler handler = c.getTransferHandler();
        handler.exportAsDrag(c, e, TransferHandler.COPY);
    }

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    @Override
    public void dragEnter(DropTargetDragEvent e) {
        DataFlavor[] flavors = e.getCurrentDataFlavors();


        JComponent c = (JComponent)e.getDropTargetContext().getComponent();
        TransferHandler importer = c.getTransferHandler();


        if (importer != null && importer.canImport(c, flavors)) {
            canImport = true;
        } else {
            canImport = false;
        }

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    @Override
    public void drop(DropTargetDropEvent e) {
        int dropAction = e.getDropAction();


        JComponent c = (JComponent)e.getDropTargetContext().getComponent();
        TransferHandler importer = c.getTransferHandler();


        if (canImport && importer != null && actionSupported(dropAction) && isDropable(e.getSource())) {
            e.acceptDrop(dropAction);


            try {

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    }
    return selfInstance;
  }
    public void mousePressed(MouseEvent e) {
        JComponent c = (JComponent)e.getSource();
        TransferHandler handler = c.getTransferHandler();
        handler.exportAsDrag(c, e, TransferHandler.COPY);
    }

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