Examples of javax.swing.TransferHandler$DropHandler

javax.swing.TransferHandler
This is the default drop target for drag and drop operations if one isn't provided by the developer. DropTarget only supports one DropTargetListener and doesn't function properly if it isn't set. This class sets the one listener as the linkage of drop handling to the TransferHandler, and adds support for additional listeners which some of the ComponentUI implementations install to manipulate a drop insertion location.

   * 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();
      // Not supported in headless environment
      try {
        graph.setTransferHandler(defaultTransferHandler);

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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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        viewersList.setDropMode(DropMode.INSERT);
        viewersList.enableInputMethods(true);
        viewersList.setDragEnabled(true);
        viewersList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
        viewersList.getSelectionModel().addListSelectionListener(this);
        viewersList.setTransferHandler(new TransferHandler() {


            @Override
            public boolean canImport(TransferHandler.TransferSupport info) {
                // we only import NodeViewers
                if (!info

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    /**
     * Copies selected rows to the system clipboard.
     */
    public void copySelectedToClipboard() {
        final TransferHandler handler = resultsOutline.getTransferHandler();
        final Toolkit tk = Toolkit.getDefaultToolkit();
        final Clipboard clipboard = tk.getSystemClipboard();
        handler.exportToClipboard(resultsOutline, clipboard, TransferHandler.COPY);
    }

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      }


    });


    // Shows a nice icon for drag and drop but doesn't import anything
    setTransferHandler(new TransferHandler()
    {
      public boolean canImport(JComponent comp, DataFlavor[] flavors)
      {
        return true;
      }

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    {
      public void dragGestureRecognized(DragGestureEvent e)
      {
        if (graphComponent.isDragEnabled() && first != null)
        {
          final TransferHandler th = graphComponent
              .getTransferHandler();


          if (th instanceof mxGraphTransferHandler)
          {
            final mxGraphTransferable t = (mxGraphTransferable) ((mxGraphTransferHandler) th)

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       * 
       */
      public Object getCell(MouseEvent e)
      {
        mxIGraphModel model = graphComponent.getGraph().getModel();
        TransferHandler th = graphComponent.getTransferHandler();
        boolean isLocal = th instanceof mxGraphTransferHandler
            && ((mxGraphTransferHandler) th).isLocalDrag();


        mxGraph graph = graphComponent.getGraph();
        Object cell = super.getCell(e);

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   * 
   */
  public void dragEnter(DropTargetDragEvent e)
  {
    JComponent component = getDropTarget(e);
    TransferHandler th = component.getTransferHandler();
    boolean isLocal = th instanceof mxGraphTransferHandler
        && ((mxGraphTransferHandler) th).isLocalDrag();


    if (isLocal)
    {
      canImport = true;
    }
    else
    {
      canImport = graphComponent.isImportEnabled()
          && th.canImport(component, e.getCurrentDataFlavors());
    }


    if (canImport)
    {
      transferBounds = null;

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   */
  protected static final mxGraphTransferHandler getGraphTransferHandler(
      DropTargetEvent e)
  {
    JComponent component = getDropTarget(e);
    TransferHandler transferHandler = component.getTransferHandler();


    if (transferHandler instanceof mxGraphTransferHandler)
    {
      return (mxGraphTransferHandler) transferHandler;
    }

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      column = getColumnModel().getColumn(3);
      column.setMaxWidth(12);
      column = getColumnModel().getColumn(4);
      column.setMaxWidth(12);


      setTransferHandler(new TransferHandler()
      {


        /* (non-Javadoc)
         * @see javax.swing.TransferHandler#getSourceActions(javax.swing.JComponent)
         */

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