/* * 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;/* * BasicDnD.java requires no other files. */import java.util.*;import java.awt.*;import java.awt.event.*;import java.text.*;import java.awt.datatransfer.*;import javax.swing.*;import javax.swing.text.*;import javax.swing.tree.*;import javax.swing.table.*;public class BasicDnD extends JPanel implements ActionListener {    private static JFrame frame;    private JTextArea textArea;    private JTextField textField;    private JList list;    private JTable table;    private JTree tree;    private JColorChooser colorChooser;    private JCheckBox toggleDnD;        public BasicDnD() {        super(new BorderLayout());        JPanel leftPanel = createVerticalBoxPanel();        JPanel rightPanel = createVerticalBoxPanel();        //Create a table model.        DefaultTableModel tm = new DefaultTableModel();        tm.addColumn("Column 0");        tm.addColumn("Column 1");        tm.addColumn("Column 2");        tm.addColumn("Column 3");        tm.addRow(new String[]{"Table 00", "Table 01", "Table 02", "Table 03"});        tm.addRow(new String[]{"Table 10", "Table 11", "Table 12", "Table 13"});        tm.addRow(new String[]{"Table 20", "Table 21", "Table 22", "Table 23"});        tm.addRow(new String[]{"Table 30", "Table 31", "Table 32", "Table 33"});        //LEFT COLUMN        //Use the table model to create a table.        table = new JTable(tm);        leftPanel.add(createPanelForComponent(table, "JTable"));        //Create a color chooser.        colorChooser = new JColorChooser();        leftPanel.add(createPanelForComponent(colorChooser, "JColorChooser"));        //RIGHT COLUMN        //Create a textfield.        textField = new JTextField(30);        textField.setText("Favorite foods:\nPizza, Moussaka, Pot roast");        rightPanel.add(createPanelForComponent(textField, "JTextField"));        //Create a scrolled text area.        textArea = new JTextArea(5, 30);        textArea.setText("Favorite shows:\nBuffy, Alias, Angel");        JScrollPane scrollPane = new JScrollPane(textArea);        rightPanel.add(createPanelForComponent(scrollPane, "JTextArea"));        //Create a list model and a list.        DefaultListModel listModel = new DefaultListModel();        listModel.addElement("Martha Washington");        listModel.addElement("Abigail Adams");        listModel.addElement("Martha Randolph");        listModel.addElement("Dolley Madison");        listModel.addElement("Elizabeth Monroe");        listModel.addElement("Louisa Adams");        listModel.addElement("Emily Donelson");        list = new JList(listModel);        list.setVisibleRowCount(-1);        list.getSelectionModel().setSelectionMode(ListSelectionModel.MULTIPLE_INTERVAL_SELECTION);                list.setTransferHandler(new TransferHandler() {            public boolean canImport(TransferHandler.TransferSupport info) {                // we only import Strings                if (!info.isDataFlavorSupported(DataFlavor.stringFlavor)) {                    return false;                }                JList.DropLocation dl = (JList.DropLocation)info.getDropLocation();                if (dl.getIndex() == -1) {                    return false;                }                return true;            }            public boolean importData(TransferHandler.TransferSupport info) {                if (!info.isDrop()) {                    return false;                }                                // Check for String flavor                if (!info.isDataFlavorSupported(DataFlavor.stringFlavor)) {                    displayDropLocation("List doesn't accept a drop of this type.");                    return false;                }                JList.DropLocation dl = (JList.DropLocation)info.getDropLocation();                DefaultListModel listModel = (DefaultListModel)list.getModel();                int index = dl.getIndex();                boolean insert = dl.isInsert();                // Get the current string under the drop.                String value = (String)listModel.getElementAt(index);                // Get the string that is being dropped.                Transferable t = info.getTransferable();                String data;                try {                    data = (String)t.getTransferData(DataFlavor.stringFlavor);                }                 catch (Exception e) { return false; }                                // Display a dialog with the drop information.                String dropValue = "\"" + data + "\" dropped ";                if (dl.isInsert()) {                    if (dl.getIndex() == 0) {                        displayDropLocation(dropValue + "at beginning of list");                    } else if (dl.getIndex() >= list.getModel().getSize()) {                        displayDropLocation(dropValue + "at end of list");                    } else {                        String value1 = (String)list.getModel().getElementAt(dl.getIndex() - 1);                        String value2 = (String)list.getModel().getElementAt(dl.getIndex());                        displayDropLocation(dropValue + "between \"" + value1 + "\" and \"" + value2 + "\"");                    }                } else {                    displayDropLocation(dropValue + "on top of " + "\"" + value + "\"");                }                		/**  This is commented out for the basicdemo.html tutorial page.                 **  If you add this code snippet back and delete the                 **  "return false;" line, the list will accept drops                 **  of type string.                // Perform the actual import.                  if (insert) {                    listModel.add(index, data);                } else {                    listModel.set(index, data);                }                return true;		*/		return false;            }                        public int getSourceActions(JComponent c) {                return COPY;            }                        protected Transferable createTransferable(JComponent c) {                JList list = (JList)c;                Object[] values = list.getSelectedValues();                        StringBuffer buff = new StringBuffer();                for (int i = 0; i < values.length; i++) {                    Object val = values[i];                    buff.append(val == null ? "" : val.toString());                    if (i != values.length - 1) {                        buff.append("\n");                    }                }                return new StringSelection(buff.toString());            }        });        list.setDropMode(DropMode.ON_OR_INSERT);                JScrollPane listView = new JScrollPane(list);        listView.setPreferredSize(new Dimension(300, 100));        rightPanel.add(createPanelForComponent(listView, "JList"));        //Create a tree.        DefaultMutableTreeNode rootNode = new DefaultMutableTreeNode("Mia Familia");        DefaultMutableTreeNode sharon = new DefaultMutableTreeNode("Sharon");        rootNode.add(sharon);        DefaultMutableTreeNode maya = new DefaultMutableTreeNode("Maya");        sharon.add(maya);        DefaultMutableTreeNode anya = new DefaultMutableTreeNode("Anya");        sharon.add(anya);        sharon.add(new DefaultMutableTreeNode("Bongo"));        maya.add(new DefaultMutableTreeNode("Muffin"));        anya.add(new DefaultMutableTreeNode("Winky"));        DefaultTreeModel model = new DefaultTreeModel(rootNode);        tree = new JTree(model);        tree.getSelectionModel().setSelectionMode              (TreeSelectionModel.DISCONTIGUOUS_TREE_SELECTION);        JScrollPane treeView = new JScrollPane(tree);        treeView.setPreferredSize(new Dimension(300, 100));        rightPanel.add(createPanelForComponent(treeView, "JTree"));        //Create the toggle button.        toggleDnD = new JCheckBox("Turn on Drag and Drop");        toggleDnD.setActionCommand("toggleDnD");        toggleDnD.addActionListener(this);        JSplitPane splitPane = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT,                                              leftPanel, rightPanel);        splitPane.setOneTouchExpandable(true);        add(splitPane, BorderLayout.CENTER);        add(toggleDnD, BorderLayout.PAGE_END);        setBorder(BorderFactory.createEmptyBorder(5,5,5,5));    }    protected JPanel createVerticalBoxPanel() {        JPanel p = new JPanel();        p.setLayout(new BoxLayout(p, BoxLayout.PAGE_AXIS));        p.setBorder(BorderFactory.createEmptyBorder(5,5,5,5));        return p;    }    public JPanel createPanelForComponent(JComponent comp,                                          String title) {        JPanel panel = new JPanel(new BorderLayout());        panel.add(comp, BorderLayout.CENTER);        if (title != null) {            panel.setBorder(BorderFactory.createTitledBorder(title));        }        return panel;    }    private void displayDropLocation(final String string) {        SwingUtilities.invokeLater(new Runnable() {            public void run() {                JOptionPane.showMessageDialog(null, string);            }        });    }    public void actionPerformed(ActionEvent e) {        if ("toggleDnD".equals(e.getActionCommand())) {            boolean toggle = toggleDnD.isSelected();            textArea.setDragEnabled(toggle);            textField.setDragEnabled(toggle);            list.setDragEnabled(toggle);            table.setDragEnabled(toggle);            tree.setDragEnabled(toggle);            colorChooser.setDragEnabled(toggle);        }    }    /**     * Create the GUI and show it.  For thread safety,     * this method should be invoked from the     * event-dispatching thread.     */    private static void createAndShowGUI() {        //Create and set up the window.        frame = new JFrame("BasicDnD");        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);        //Create and set up the content pane.        JComponent newContentPane = new BasicDnD();        newContentPane.setOpaque(true); //content panes must be opaque        frame.setContentPane(newContentPane);        //Display the window.        frame.pack();        frame.setVisible(true);    }    public static void main(String[] args) {        //Schedule a job for the event-dispatching thread:        //creating and showing this application's GUI.        javax.swing.SwingUtilities.invokeLater(new Runnable() {            public void run() {                //Turn off metal's use of bold fonts	        UIManager.put("swing.boldMetal", Boolean.FALSE);                createAndShowGUI();            }        });    }}