/* * Copyright (c) 1995 - 2008 Sun Microsystems, Inc.  All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * *   - Redistributions of source code must retain the above copyright *     notice, this list of conditions and the following disclaimer. * *   - Redistributions in binary form must reproduce the above copyright *     notice, this list of conditions and the following disclaimer in the *     documentation and/or other materials provided with the distribution. * *   - Neither the name of Sun Microsystems nor the names of its *     contributors may be used to endorse or promote products derived *     from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ package dnd;/* * ListTransferHandler.java is used by the ListCutPaste example. */import java.io.*;import java.awt.*;import java.awt.datatransfer.*;import java.awt.event.*;import javax.swing.*;class ListTransferHandler extends TransferHandler {    /**     * Perform the actual data import.     */    public boolean importData(TransferHandler.TransferSupport info) {        String data = null;        //If we can't handle the import, bail now.        if (!canImport(info)) {            return false;        }        JList list = (JList)info.getComponent();        DefaultListModel model = (DefaultListModel)list.getModel();        //Fetch the data -- bail if this fails        try {            data = (String)info.getTransferable().getTransferData(DataFlavor.stringFlavor);        } catch (UnsupportedFlavorException ufe) {            System.out.println("importData: unsupported data flavor");            return false;        } catch (IOException ioe) {            System.out.println("importData: I/O exception");            return false;        }        if (info.isDrop()) { //This is a drop            JList.DropLocation dl = (JList.DropLocation)info.getDropLocation();            int index = dl.getIndex();            if (dl.isInsert()) {                model.add(index, data);                return true;            } else {                model.set(index, data);                return true;            }        } else { //This is a paste            int index = list.getSelectedIndex();            // if there is a valid selection,            // insert data after the selection            if (index >= 0) {                model.add(list.getSelectedIndex()+1, data);            // else append to the end of the list            } else {                model.addElement(data);            }            return true;        }    }    /**     * Bundle up the data for export.     */    protected Transferable createTransferable(JComponent c) {        JList list = (JList)c;        int index = list.getSelectedIndex();        String value = (String)list.getSelectedValue();        return new StringSelection(value);    }    /**     * The list handles both copy and move actions.     */    public int getSourceActions(JComponent c) {        return COPY_OR_MOVE;    }    /**      * When the export is complete, remove the old list entry if the     * action was a move.     */    protected void exportDone(JComponent c, Transferable data, int action) {        if (action != MOVE) {            return;        }        JList list = (JList)c;        DefaultListModel model = (DefaultListModel)list.getModel();        int index = list.getSelectedIndex();        model.remove(index);    }    /**     * We only support importing strings.     */    public boolean canImport(TransferHandler.TransferSupport support) {        // we only import Strings        if (!support.isDataFlavorSupported(DataFlavor.stringFlavor)) {            return false;        }        return true;    }}