BasicDnD (Drag and Drop) : Drag Drop « Swing JFC « Java






BasicDnD (Drag and Drop)

BasicDnD (Drag and Drop)
  
/* From http://java.sun.com/docs/books/tutorial/index.html */

/*
 * Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved.
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 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * -Redistribution of source code must retain the above copyright notice, this
 *  list of conditions and the following disclaimer.
 *
 * -Redistribution 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, Inc. or the names of contributors may
 * be used to endorse or promote products derived from this software without
 * specific prior written permission.
 *
 * This software is provided "AS IS," without a warranty of any kind. ALL
 * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING
 * ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
 * OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN MIDROSYSTEMS, INC. ("SUN")
 * AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE
 * AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
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 * REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL,
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 * OF LIABILITY, ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE,
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 *
 * You acknowledge that this software is not designed, licensed or intended
 * for use in the design, construction, operation or maintenance of any
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 */

/*
 * BasicDnD.java is a 1.4 example that requires no other files.
 */

import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.BorderFactory;
import javax.swing.BoxLayout;
import javax.swing.DefaultListModel;
import javax.swing.JCheckBox;
import javax.swing.JColorChooser;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JSplitPane;
import javax.swing.JTable;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.JTree;
import javax.swing.ListSelectionModel;
import javax.swing.table.DefaultTableModel;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeModel;
import javax.swing.tree.TreeSelectionModel;

public class BasicDnD extends JPanel implements ActionListener {
  static JFrame frame;

  JTextArea textArea;

  JTextField textField;

  JList list;

  JTable table;
  JTree tree;

  JColorChooser colorChooser;

  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.setSelectionMode(ListSelectionModel.SINGLE_INTERVAL_SELECTION);
    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;
  }

  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() {
    //Make sure we have nice window decorations.
    JFrame.setDefaultLookAndFeelDecorated(true);

    //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() {
        createAndShowGUI();
      }
    });
  }
}

           
         
    
  








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