SwingDnDTest.java Source code

Introduction

Here is the source code for SwingDnDTest.java

Source

/*
 This program is a part of the companion code for Core Java 8th ed.
 (http://horstmann.com/corejava)
    
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation, either version 3 of the License, or
 (at your option) any later version.
    
 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.
    
 You should have received a copy of the GNU General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.EventQueue;

import javax.swing.DefaultListModel;
import javax.swing.JColorChooser;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JList;
import javax.swing.JScrollPane;
import javax.swing.JTabbedPane;
import javax.swing.JTable;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.JTree;
import javax.swing.TransferHandler;
import javax.swing.border.EtchedBorder;
import javax.swing.border.TitledBorder;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
import javax.swing.tree.DefaultMutableTreeNode;

/**
 * This program demonstrates the basic Swing support for drag and drop.
 * 
 * @version 1.10 2007-09-20
 * @author Cay Horstmann
 */
public class SwingDnDTest {
    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                JFrame frame = new SwingDnDFrame();
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                frame.setVisible(true);
            }
        });
    }
}

class SwingDnDFrame extends JFrame {
    public SwingDnDFrame() {
        setTitle("SwingDnDTest");
        JTabbedPane tabbedPane = new JTabbedPane();

        JList list = SampleComponents.list();
        tabbedPane.addTab("List", list);
        JTable table = SampleComponents.table();
        tabbedPane.addTab("Table", table);
        JTree tree = SampleComponents.tree();
        tabbedPane.addTab("Tree", tree);
        JFileChooser fileChooser = new JFileChooser();
        tabbedPane.addTab("File Chooser", fileChooser);
        JColorChooser colorChooser = new JColorChooser();
        tabbedPane.addTab("Color Chooser", colorChooser);

        final JTextArea textArea = new JTextArea(4, 40);
        JScrollPane scrollPane = new JScrollPane(textArea);
        scrollPane.setBorder(new TitledBorder(new EtchedBorder(), "Drag text here"));

        JTextField textField = new JTextField("Drag color here");
        textField.setTransferHandler(new TransferHandler("background"));

        tabbedPane.addChangeListener(new ChangeListener() {
            public void stateChanged(ChangeEvent e) {
                textArea.setText("");
            }
        });

        tree.setDragEnabled(true);
        table.setDragEnabled(true);
        list.setDragEnabled(true);
        fileChooser.setDragEnabled(true);
        colorChooser.setDragEnabled(true);
        textField.setDragEnabled(true);

        add(tabbedPane, BorderLayout.NORTH);
        add(scrollPane, BorderLayout.CENTER);
        add(textField, BorderLayout.SOUTH);
        pack();
    }
}

/*
 * This program is a part of the companion code for Core Java 8th ed.
 * (http://horstmann.com/corejava)
 * 
 * This program is free software: you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free Software
 * Foundation, either version 3 of the License, or (at your option) any later
 * version.
 * 
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
 * details.
 * 
 * You should have received a copy of the GNU General Public License along with
 * this program. If not, see <http://www.gnu.org/licenses/>.
 */

class SampleComponents {
    public static JTree tree() {
        DefaultMutableTreeNode root = new DefaultMutableTreeNode("World");
        DefaultMutableTreeNode country = new DefaultMutableTreeNode("USA");
        root.add(country);
        DefaultMutableTreeNode state = new DefaultMutableTreeNode("California");
        country.add(state);
        DefaultMutableTreeNode city = new DefaultMutableTreeNode("San Jose");
        state.add(city);
        city = new DefaultMutableTreeNode("Cupertino");
        state.add(city);
        state = new DefaultMutableTreeNode("Michigan");
        country.add(state);
        city = new DefaultMutableTreeNode("Ann Arbor");
        state.add(city);
        country = new DefaultMutableTreeNode("Germany");
        root.add(country);
        state = new DefaultMutableTreeNode("Schleswig-Holstein");
        country.add(state);
        city = new DefaultMutableTreeNode("Kiel");
        state.add(city);
        return new JTree(root);
    }

    public static JList list() {
        String[] words = { "quick", "brown", "hungry", "wild", "silent", "huge", "private", "abstract", "static",
                "final" };

        DefaultListModel model = new DefaultListModel();
        for (String word : words)
            model.addElement(word);
        return new JList(model);
    }

    public static JTable table() {
        Object[][] cells = { { "Mercury", 2440.0, 0, false, Color.YELLOW },
                { "Venus", 6052.0, 0, false, Color.YELLOW }, { "Earth", 6378.0, 1, false, Color.BLUE },
                { "Mars", 3397.0, 2, false, Color.RED }, { "Jupiter", 71492.0, 16, true, Color.ORANGE },
                { "Saturn", 60268.0, 18, true, Color.ORANGE }, { "Uranus", 25559.0, 17, true, Color.BLUE },
                { "Neptune", 24766.0, 8, true, Color.BLUE }, { "Pluto", 1137.0, 1, false, Color.BLACK } };

        String[] columnNames = { "Planet", "Radius", "Moons", "Gaseous", "Color" };
        return new JTable(cells, columnNames);
    }
}