ClipboardTest.java Source code

Introduction

Here is the source code for ClipboardTest.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.Button;
import java.awt.Frame;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.TextArea;
import java.awt.datatransfer.Clipboard;
import java.awt.datatransfer.ClipboardOwner;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.StringSelection;
import java.awt.datatransfer.Transferable;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

/** Taken from the Sun documentation on Clipboard API */
public class ClipboardTest extends Frame implements ClipboardOwner, ActionListener {

    TextArea srcText, dstText;

    Button copyButton, pasteButton;

    Clipboard clipboard = getToolkit().getSystemClipboard();

    public ClipboardTest() {
        super("Clipboard Test");
        GridBagLayout gridbag = new GridBagLayout();
        GridBagConstraints c = new GridBagConstraints();
        setLayout(gridbag);

        srcText = new TextArea(8, 32);
        c.gridwidth = 2;
        c.anchor = GridBagConstraints.CENTER;
        gridbag.setConstraints(srcText, c);
        add(srcText);

        copyButton = new Button("Copy Above");
        copyButton.setActionCommand("copy");
        copyButton.addActionListener(this);
        c.gridy = 1;
        c.gridwidth = 1;
        gridbag.setConstraints(copyButton, c);
        add(copyButton);

        pasteButton = new Button("Paste Below");
        pasteButton.setActionCommand("paste");
        pasteButton.addActionListener(this);
        pasteButton.setEnabled(false);
        c.gridx = 1;
        gridbag.setConstraints(pasteButton, c);
        add(pasteButton);

        dstText = new TextArea(8, 32);
        c.gridx = 0;
        c.gridy = 2;
        c.gridwidth = 2;
        gridbag.setConstraints(dstText, c);
        add(dstText);

        pack();
    }

    public void actionPerformed(ActionEvent evt) {
        String cmd = evt.getActionCommand();

        if (cmd.equals("copy")) {
            // Implement Copy operation
            String srcData = srcText.getText();
            if (srcData != null) {
                StringSelection contents = new StringSelection(srcData);
                clipboard.setContents(contents, this);
                pasteButton.setEnabled(true);
            }
        } else if (cmd.equals("paste")) {
            // Implement Paste operation
            Transferable content = clipboard.getContents(this);
            if (content != null) {
                try {
                    String dstData = (String) content.getTransferData(DataFlavor.stringFlavor);
                    dstText.append(dstData);
                } catch (Exception e) {
                    System.out.println("Couldn't get contents in format: "
                            + DataFlavor.stringFlavor.getHumanPresentableName());
                }
            }
        }
    }

    public void lostOwnership(Clipboard clipboard, Transferable contents) {
        System.out.println("Clipboard contents replaced");
    }

    public static void main(String[] args) {
        ClipboardTest test = new ClipboardTest();
        test.setVisible(true);
    }
}