javax.swing.TransferHandler Java Examples

@Override
public boolean canImport(TransferHandler.TransferSupport support) {

    if (!support.isDrop()) {
        return false;
    }

    if (!support.isDataFlavorSupported(DataFlavor.javaFileListFlavor)) {
        return false;
    }


    boolean actionSupported = (MOVE & support.getSourceDropActions()) == MOVE;
    if (!actionSupported) {
        return false;
    }

    support.setDropAction(MOVE);
    return true;
}
 

@Override
public void setDocument(Document doc) {
    super.setDocument(doc);
    
    // Setting DelegatingTransferHandler, where CallbackTransferable will
    // be handled in importData method. 
    // For more details, please refer issue #53439        
    if (doc != null){
        TransferHandler thn = getTransferHandler();
        if( !(thn instanceof DelegatingTransferHandler) ) {
            DelegatingTransferHandler dth = new DelegatingTransferHandler(thn);
            setTransferHandler(dth);
        }

        DropTarget currDt = getDropTarget();
        if( !(currDt instanceof DelegatingDropTarget ) ) {
            DropTarget dt = new DelegatingDropTarget( currDt );
            setDropTarget( dt );
        }
    }
}
 

/**
 * Creates new form TreeGuiView
 */
public TreeGuiView() {
    initComponents();
     TreeTrasferHandling trasferHandling = new TreeTrasferHandling();
    this.jTree2.setTransferHandler(trasferHandling);
    CommandProcessor.getInstance().getObservable().addObserver(this);
    ActionMap map = this.getActionMap();
   map.put(TransferHandler.getCopyAction().getValue(javax.swing.Action.NAME),
            TransferHandler.getCopyAction());
    
    
    map.put(TransferHandler.getPasteAction().getValue(javax.swing.Action.NAME),
            TransferHandler.getPasteAction());
    map.put(TransferHandler.getCutAction().getValue(javax.swing.Action.NAME),
            TransferHandler.getCutAction());
    
   
}
 

@SuppressWarnings("unchecked")
@Override
public boolean importData(TransferHandler.TransferSupport info) {
	if (!info.isDrop())
		return false;
	Transferable t = info.getTransferable();
	List<File> data = null;
	try {
		data = (List<File>) t.getTransferData(DataFlavor.javaFileListFlavor);
	} catch (Exception e) {
		return false;
	}
	user.preLoadJars(id);
	for (File jar : data) {
		if (jar.getName().toLowerCase().endsWith(".jar")) {
			user.onJarLoad(id, jar);
			break;
		}
	}
	return true;
}
 

public void dragEnter(DropTargetDragEvent event) {
    DataFlavor[] dataFlavors = event.getCurrentDataFlavors();
    JComponent c = (JComponent) event.getDropTargetContext().getComponent();
    TransferHandler transferHandler = c.getTransferHandler();

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

    int dropAction = event.getDropAction();

    if (canImport && actionSupported(dropAction)) {
        event.acceptDrag(dropAction);
    } else {
        event.rejectDrag();
    }
}
 

private Boolean reorderProjects(TransferHandler.TransferSupport support) {
    JList list = (JList) support.getComponent();
    try {
        int[] selectedIndices = (int[]) support.getTransferable().getTransferData(INDICES);
        DefaultListModel model = (DefaultListModel) list.getModel();
        JList.DropLocation dl = (JList.DropLocation) support.getDropLocation();
        if (dl.getIndex() != -1) {
            for (int selectedIndex : selectedIndices) {
                Object value = model.get(selectedIndex);
                model.removeElement(value);
                model.add(dl.getIndex(), value);
            }
            return true;
        } else {
            LOG.warning("Invalid Drop Location");
        }
    } catch (UnsupportedFlavorException | IOException ex) {
        LOG.log(Level.SEVERE, ex.getMessage(), ex);
    }
    return false;
}
 

public DraggableButton(final Action action) {
    super(action);

    addMouseListener(new MouseAdapter() {
        @Override
        public void mousePressed(final MouseEvent event) {
            getTransferHandler().exportAsDrag(DraggableButton.this, event, TransferHandler.COPY);
        }
    });
    t = new TransferHandler("graph") {
        @Override
        public Transferable createTransferable(final JComponent c) {
            return new StringSelection("graphSelection");
        }
    };

    setTransferHandler(t);
    source = new DragSource();
    source.createDefaultDragGestureRecognizer(this, DnDConstants.ACTION_COPY, this);
}
 

private void setCCP() {
    TransferActionListener actionListener = new TransferActionListener();
    cut = new JMenuItem("Cut");
    cut.setActionCommand((String) TransferHandler.getCutAction().getValue(Action.NAME));
    cut.addActionListener(actionListener);
    cut.setAccelerator(Keystroke.CUT);
    cut.setMnemonic(KeyEvent.VK_T);
    add(cut);

    copy = new JMenuItem("Copy");
    copy.setActionCommand((String) TransferHandler.getCopyAction().getValue(Action.NAME));
    copy.addActionListener(actionListener);
    copy.setAccelerator(Keystroke.COPY);
    copy.setMnemonic(KeyEvent.VK_C);
    add(copy);

    paste = new JMenuItem("Paste");
    paste.setActionCommand((String) TransferHandler.getPasteAction().getValue(Action.NAME));
    paste.addActionListener(actionListener);
    paste.setAccelerator(Keystroke.PASTE);
    paste.setMnemonic(KeyEvent.VK_P);
    add(paste);
}
 

private void setCCP() {
    TransferActionListener actionListener = new TransferActionListener();
    cut = new JMenuItem("Cut");
    cut.setActionCommand((String) TransferHandler.getCutAction().getValue(Action.NAME));
    cut.addActionListener(actionListener);
    cut.setAccelerator(Keystroke.CUT);
    cut.setMnemonic(KeyEvent.VK_T);
    add(cut);

    copy = new JMenuItem("Copy");
    copy.setActionCommand((String) TransferHandler.getCopyAction().getValue(Action.NAME));
    copy.addActionListener(actionListener);
    copy.setAccelerator(Keystroke.COPY);
    copy.setMnemonic(KeyEvent.VK_C);
    add(copy);

    paste = new JMenuItem("Paste");
    paste.setActionCommand((String) TransferHandler.getPasteAction().getValue(Action.NAME));
    paste.addActionListener(actionListener);
    paste.setAccelerator(Keystroke.PASTE);
    paste.setMnemonic(KeyEvent.VK_P);
    add(paste);
}
 

@Override
public boolean importData(TransferHandler.TransferSupport support) {
    if (!canImport(support)) {
        return false;
    }
    JTable.DropLocation dl = (JTable.DropLocation) support.getDropLocation();
    JTable table = (JTable) support.getComponent();
    int row = dl.getRow();
    int tcRow = dl.getColumn() - 1;
    if (row == -1) {
        return false;
    }

    Scenario scenario = (Scenario) table.getModel();
    TestCase testCase = scenario.getTestCaseByName(
            table.getValueAt(row, 0).toString());

    if (dropObject instanceof TestCaseDnD) {
        putReusables(testCase, tcRow);
    } else {
        return false;
    }
    return super.importData(support);
}
 

@Override
        public boolean importData(TransferHandler.TransferSupport info) {
            // faking out the clipboard with our own clipboard to prevent copying of data objects
            if (!info.isDrop()) {
                return false;
            }

            DefaultListModel<TripoliFraction> listModel = (DefaultListModel<TripoliFraction>) list.getModel();

//            // Get the DragAndDropListItemInterface that is being dropped.
//            Transferable t = info.getTransferable();
//            DragAndDropListItemInterface[] data;
//            try {
//                data = (DragAndDropListItemInterface[])t.getTransferData( DataFlavor.stringFlavor );;
//            } catch (Exception e) {
//                return false;
//            }
            /**
             * Perform the actual import. Keep items in sort order
             *
             */
            DragAndDropListItemInterface[] data = reduxDragAndDropClipboardInterface.getDndClipboardListItems();
            for (int i = 0; i < data.length; i++) {
                // find where to insert element in backing list
                TripoliFraction tf = (TripoliFraction) data[i];
                int index = Collections.binarySearch(dndListTripoliFractions, tf);
                dndListTripoliFractions.add(Math.abs(index + 1), tf);

                // insert into list as well
                listModel.add(Math.abs(index + 1), tf);

                tripoliSample.addTripoliFraction(tf);
            }

            closeButton.setEnabled(dndListTripoliFractions.isEmpty());

            return true;

        }
 

@Override
public void setTransferHandler(TransferHandler newHandler) {
	if (newHandler instanceof PlotConfigurationTreeTransferHandler) {
		DragListener cellRenderer = (DragListener) getCellRenderer();
		PlotConfigurationTreeTransferHandler plotConfigurationTreeTransferHandler = (PlotConfigurationTreeTransferHandler) newHandler;
		if (cellRenderer != null) {
			plotConfigurationTreeTransferHandler.removeDragListener(cellRenderer);
		}
		plotConfigurationTreeTransferHandler.addDragListener(cellRenderer);
	}
	super.setTransferHandler(newHandler);
}
 

@Override
public boolean importData(TransferHandler.TransferSupport support) {
    if (!canImport(support)) {
        return false;
    }
    if (support.getTransferable().isDataFlavorSupported(INDICES)) {
        return reorderProjects(support);
    } else {
        return dropProjects(support);
    }
}
 

@Override
public boolean importData(TransferHandler.TransferSupport support) {
    if (!canImport(support)) {
        return false;
    }
    // Extract transfer data.
    DefaultMutableTreeNode[] nodes = null;
    try {
        Transferable t = support.getTransferable();
        nodes = (DefaultMutableTreeNode[]) t.getTransferData(nodesFlavor);
    } catch (UnsupportedFlavorException ufe) {
        System.out.println("UnsupportedFlavor: " + ufe.getMessage());
    } catch (java.io.IOException ioe) {
        System.out.println("I/O error: " + ioe.getMessage());
    }
    // Get drop location info.
    JTree.DropLocation dl = (JTree.DropLocation) support.getDropLocation();
    int childIndex = dl.getChildIndex();
    TreePath dest = dl.getPath();
    DefaultMutableTreeNode parent = (DefaultMutableTreeNode)
            dest.getLastPathComponent();
    JTree tree = (JTree) support.getComponent();
    DefaultTreeModel model = (DefaultTreeModel) tree.getModel();
    // Configure for drop mode.
    int index = childIndex;    // DropMode.INSERT
    if (childIndex == -1) {     // DropMode.ON
        index = parent.getChildCount();
    }
    // Add data to model.
    for (DefaultMutableTreeNode node : nodes) {
        model.insertNodeInto(node, parent, index++);
    }
    return true;
}
 

@Override
public boolean canImport(TransferHandler.TransferSupport support) {
    if (!support.isDrop()) {
        return false;
    }
    support.setShowDropLocation(true);
    if (!support.isDataFlavorSupported(nodesFlavor)) {
        return false;
    }
    // Do not allow a drop on the drag source selections.
    JTree.DropLocation dl = (JTree.DropLocation) support.getDropLocation();
    JTree tree = (JTree) support.getComponent();
    int dropRow = tree.getRowForPath(dl.getPath());
    int[] selRows = tree.getSelectionRows();
    for (int i = 0; i < selRows.length; i++) {
        if (selRows[i] == dropRow) {
            return false;
        }
    }
    // Do not allow MOVE-action drops if a non-leaf node is
    // selected unless all of its children are also selected.
    int action = support.getDropAction();
    if (action == MOVE) {
        return haveCompleteNode(tree);
    }
    // Do not allow a non-leaf node to be copied to a level
    // which is less than its source level.
    TreePath dest = dl.getPath();
    DefaultMutableTreeNode target = (DefaultMutableTreeNode)
            dest.getLastPathComponent();
    TreePath path = tree.getPathForRow(selRows[0]);
    DefaultMutableTreeNode firstNode = (DefaultMutableTreeNode)
            path.getLastPathComponent();
    if (firstNode.getChildCount() > 0
            && target.getLevel() < firstNode.getLevel()) {
        return false;
    }
    return true;
}
 

private TransferHandler getTransferHandlerForSelection(Component c) {
    if (!(c instanceof JTree)) {
        logger.debug(
                "getTransferHandlerForSelection not jtree " + c.getClass().getCanonicalName());
        return null;
    }
    JTree tree = (JTree) c;
    TransferHandler th = null;

    if (tree.getSelectionPaths() == null) {
        return null;
    }

    for (TreePath tp : tree.getSelectionPaths()) {
        if (tp.getLastPathComponent() instanceof ScriptNode) {
            Object uo = ((ScriptNode) tp.getLastPathComponent()).getUserObject();
            if (uo == null) {
                // One of the selection doesnt have a user object
                // logger.debug("getTransferHandlerForSelection no user object for " + tp);
                return null;
            }
            TransferHandler th2 = this.htMap.get(uo.getClass());
            if (th2 == null) {
                // No transfer handler, no go
                return null;
            }
            if (th == null) {
                th = th2;
            } else if (!th.equals(th2)) {
                // Different transfer handlers, no go
                return null;
            }
        }
    }
    // logger.debug("getTransferHandlerForSelection no user objects found");
    return th;
}
 

private Boolean importScenarios(List<ScenarioNode> scenarioNodes,
        TransferHandler.TransferSupport ts) {
    Boolean shouldCut = ts.isDrop() ? ts.getDropAction() == MOVE : isCut;
    if (shouldCut) {
        return false;
    }
    Object destObject = getDestinationObject(ts);
    if (destObject instanceof GroupNode) {
        for (ScenarioNode scenarioNode : scenarioNodes) {
            addScenario(scenarioNode.getScenario(), (GroupNode) destObject);
        }
        return true;
    }
    return false;
}
 

public final void startDrag(MouseEvent e) {
    if(enable){
        if (!(this.getSelected() instanceof GScreen) && !(this.getSelected() instanceof GLayer)) {
            JPanel c = (JPanel) e.getComponent();
            TransferHandler handler = c.getTransferHandler();
            handler.exportAsDrag(c, e, TransferHandler.MOVE);
            this.niftyView.getDDManager().startDrag(this.getSelected());
        }
    }
  
}
 

@Override
public void setTransferHandler(TransferHandler newHandler) {
    TransferHandler oldHandler = (TransferHandler)
        getClientProperty(AWTAccessor.getClientPropertyKeyAccessor()
                              .getJComponent_TRANSFER_HANDLER());
    putClientProperty(AWTAccessor.getClientPropertyKeyAccessor()
                          .getJComponent_TRANSFER_HANDLER(),
                      newHandler);

    firePropertyChange("transferHandler", oldHandler, newHandler);
}
 

@Override
public boolean importData(TransferHandler.TransferSupport info) {
    JTable target = (JTable) info.getComponent();
    JTable.DropLocation dl = (JTable.DropLocation) info.getDropLocation();
    int index = dl.getRow();
    int max = table.getModel().getRowCount();
    if (index < 0 || index > max) {
        index = max;
    }
    target.setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
    try {
        Integer rowFrom = (Integer) info.getTransferable().getTransferData(localObjectFlavor);
        if (rowFrom != -1 && rowFrom != index) {
            Vector<Object> rowData = (Vector) getTableModel().getDataVector().get(rowFrom);
            getTableModel().removeRow(rowFrom);
            getTableModel().insertRow(index, rowData);
            if (index > rowFrom) {
                index--;
            }
            target.getSelectionModel().addSelectionInterval(index, index);
            return true;
        }
    } catch (UnsupportedFlavorException | IOException e) {
        e.printStackTrace();
    }
    return false;
}
 

@Override
public boolean canImport(TransferHandler.TransferSupport support) {
    logger.debug("canImport " + support.getComponent().getClass().getCanonicalName());
    TransferHandler th = getTransferHandlerForSelection(support.getComponent());
    if (th != null) {
        return th.canImport(support);
    }

    return false;
}
 

@Override
public void setTransferHandler(TransferHandler newHandler) {
    TransferHandler oldHandler = (TransferHandler)
        getClientProperty(AWTAccessor.getClientPropertyKeyAccessor()
                              .getJComponent_TRANSFER_HANDLER());
    putClientProperty(AWTAccessor.getClientPropertyKeyAccessor()
                          .getJComponent_TRANSFER_HANDLER(),
                      newHandler);

    firePropertyChange("transferHandler", oldHandler, newHandler);
}
 

@Override
public void setTransferHandler(TransferHandler newHandler) {
    TransferHandler oldHandler = (TransferHandler)
        getClientProperty(AWTAccessor.getClientPropertyKeyAccessor()
                              .getJComponent_TRANSFER_HANDLER());
    putClientProperty(AWTAccessor.getClientPropertyKeyAccessor()
                          .getJComponent_TRANSFER_HANDLER(),
                      newHandler);

    firePropertyChange("transferHandler", oldHandler, newHandler);
}
 

@Override
public void setTransferHandler(TransferHandler newHandler) {
    TransferHandler oldHandler = (TransferHandler)
        getClientProperty(AWTAccessor.getClientPropertyKeyAccessor()
                              .getJComponent_TRANSFER_HANDLER());
    putClientProperty(AWTAccessor.getClientPropertyKeyAccessor()
                          .getJComponent_TRANSFER_HANDLER(),
                      newHandler);

    firePropertyChange("transferHandler", oldHandler, newHandler);
}
 

@Override
public boolean canImport(TransferHandler.TransferSupport info) {
	if (!info.isDataFlavorSupported(DataFlavor.javaFileListFlavor)) {
		return false;
	}
	return true;
}
 

protected void inMiddleOfSettingUpTheManager() {
    assertNotNull("There is a manager already", System.getSecurityManager());
    // do some strange tricks to initialize the system
    field = new javax.swing.JTextField ();
    TransferHandler.getCopyAction();
    TransferHandler.getCutAction();
    TransferHandler.getPasteAction();
}
 

private void init() {
    transferHandler = new TransferHandler() {
        @Override
        protected Transferable createTransferable(JComponent c) {
            return new DnDToggleButton(getText(), getIcon());
        }
        
    };
    setTransferHandler(transferHandler);
    
    source = new DragSource();
    source.createDefaultDragGestureRecognizer(this, DnDConstants.ACTION_COPY, this);
}
 

@Override
public boolean canImport(final TransferHandler.TransferSupport support) {
    if (!support.isDataFlavorSupported(DataFlavor.stringFlavor)) {
        return false;
    }

    JList.DropLocation dl = (JList.DropLocation) support.getDropLocation();

    return dl.getIndex() != -1;
}
 

/**
 * Dirty hack to get the drop target listener defined in {@link TransferHandler} by method
 * invokation.
 */
public static DropTargetListener getDropTargetListener() throws NoSuchMethodException, SecurityException,
		IllegalAccessException, IllegalArgumentException, InvocationTargetException {
	Method m;
	m = TransferHandler.class.getDeclaredMethod("getDropTargetListener");
	m.setAccessible(true); // if security settings allow this
	return (DropTargetListener) m.invoke(null); // use null if the method is static
}
 

@Override
public void setTransferHandler(TransferHandler newHandler) {
    TransferHandler oldHandler = (TransferHandler)
        getClientProperty(AWTAccessor.getClientPropertyKeyAccessor()
                              .getJComponent_TRANSFER_HANDLER());
    putClientProperty(AWTAccessor.getClientPropertyKeyAccessor()
                          .getJComponent_TRANSFER_HANDLER(),
                      newHandler);

    firePropertyChange("transferHandler", oldHandler, newHandler);
}