Transfer.java Source code

Introduction

Here is the source code for Transfer.java

Source

/*
 * Copyright (c) Ian F. Darwin, http://www.darwinsys.com/, 1996-2002.
 * All rights reserved. Software written by Ian F. Darwin and others.
 * $Id: LICENSE,v 1.8 2004/02/09 03:33:38 ian Exp $
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
 * 
 * Java, the Duke mascot, and all variants of Sun's Java "steaming coffee
 * cup" logo are trademarks of Sun Microsystems. Sun's, and James Gosling's,
 * pioneering role in inventing and promulgating (and standardizing) the Java 
 * language and environment is gratefully acknowledged.
 * 
 * The pioneering role of Dennis Ritchie and Bjarne Stroustrup, of AT&T, for
 * inventing predecessor languages C and C++ is also gratefully acknowledged.
 */

import java.awt.Color;
import java.awt.Container;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;

import javax.swing.Box;
import javax.swing.BoxLayout;
import javax.swing.JComboBox;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JSlider;
import javax.swing.JTextField;
import javax.swing.SwingConstants;
import javax.swing.TransferHandler;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;

/**
 * Demonstrate various aspects of Swing "data transfer".
 * 
 * @author Ian Darwin, http://www.darwinsys.com
 * @author Jonathan Fuerth, http://www.SQLPower.ca
 */
public class Transfer extends JFrame {
    public static void main(String[] args) {
        new Transfer().setVisible(true);
    }

    private JTextField tf;

    private JLabel l;

    private JComboBox propertyComboBox;

    public Transfer() {

        // Establish the GUI
        Container cp = new Box(BoxLayout.X_AXIS);
        setContentPane(cp);
        JPanel firstPanel = new JPanel();
        propertyComboBox = new JComboBox();
        propertyComboBox.addItem("text");
        propertyComboBox.addItem("font");
        propertyComboBox.addItem("background");
        propertyComboBox.addItem("foreground");
        firstPanel.add(propertyComboBox);
        cp.add(firstPanel);
        cp.add(Box.createGlue());

        tf = new JTextField("Hello");
        tf.setForeground(Color.RED);
        tf.setDragEnabled(true);
        cp.add(tf);

        cp.add(Box.createGlue());

        l = new JLabel("Hello");
        l.setBackground(Color.YELLOW);
        cp.add(l);

        cp.add(Box.createGlue());

        JSlider stryder = new JSlider(SwingConstants.VERTICAL);
        stryder.setMinimum(10);
        stryder.setValue(14);
        stryder.setMaximum(72);
        stryder.setMajorTickSpacing(10);
        stryder.setPaintTicks(true);

        cp.add(stryder);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(500, 300);

        // Add Listeners and Converters
        setMyTransferHandlers((String) propertyComboBox.getSelectedItem());

        // Mousing in the Label starts a Drag.
        MouseListener myDragListener = new MouseAdapter() {
            public void mousePressed(MouseEvent e) {
                JComponent c = (JComponent) e.getSource();
                TransferHandler handler = c.getTransferHandler();
                handler.exportAsDrag(c, e, TransferHandler.COPY);
            }
        };
        l.addMouseListener(myDragListener);

        // Selecting in the ComboBox makes that the property that is xfered.
        propertyComboBox.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent ce) {
                JComboBox bx = (JComboBox) ce.getSource();
                String prop = (String) bx.getSelectedItem();
                setMyTransferHandlers(prop);
            }
        });

        // Typing a word and pressing enter in the TextField tries
        // to set that as the font name.
        tf.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent evt) {
                JTextField jtf = (JTextField) evt.getSource();
                String fontName = jtf.getText();
                Font font = new Font(fontName, Font.BOLD, 18);
                tf.setFont(font);
            }
        });

        // Setting the Slider sets that font into the textfield.
        stryder.addChangeListener(new ChangeListener() {
            public void stateChanged(ChangeEvent evt) {
                JSlider sl = (JSlider) evt.getSource();
                Font oldf = tf.getFont();
                Font newf = oldf.deriveFont((float) sl.getValue());
                tf.setFont(newf);
            }
        });

    }

    private void setMyTransferHandlers(String s) {
        TransferHandler th = new TransferHandler(s);
        tf.setTransferHandler(th);
        l.setTransferHandler(th);
    }
}