Name: tb29552 Date: 09/30/98


/*
The following code from "Graphic Java" book works with
JDK1.1.6, but does not work with JDK1.1.7:
*/
// ------- File: ClipboardTest.java

import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;
import java.awt.datatransfer.*;

public class ClipboardTest extends Applet implements ClipboardOwner {
    private Clipboard clipboard;
    private TextField copyFrom;
    private TextArea copyTo;
    private Button copy, paste;

    public void init() {
        // Obtain a reference to the system clipboard
        clipboard = getToolkit().getSystemClipboard();

        copyFrom = new TextField(20);
        copyTo = new TextArea(3, 20);
        copy = new Button("Copy To System Clipboard");
        paste = new Button("Paste From System Clipboard");

        add(copyFrom);
        add(copy);
        add(paste);
        add(copyTo);

        copy.addActionListener(new CopyListener());
        paste.addActionListener(new PasteListener());
    }
    class CopyListener implements ActionListener {
        public void actionPerformed(ActionEvent event) {
            // Wrap the data in a transferable object
            StringSelection contents =
                new StringSelection(copyFrom.getText());

            // Place the transferable onto the clipboard
            clipboard.setContents(contents, ClipboardTest.this);
        }
    }
    class PasteListener implements ActionListener {
        public void actionPerformed(ActionEvent event) {
            Transferable contents = clipboard.getContents(this);

            // Determine if data is available in string flavor
            if (contents != null &&
                contents.isDataFlavorSupported(
                    DataFlavor.stringFlavor)) {
                try {
                    String string;

                    // Have contents cough up string
                    string = (String) contents.getTransferData(
                        DataFlavor.stringFlavor);
                    copyTo.append(string);
                }
                catch(Exception e) {
                    e.printStackTrace();
                }
            }
        }
    }
    public void lostOwnership(Clipboard clip,
                              Transferable transferable) {
        System.out.println("Lost ownership");
    }
}

// -- test.html for appletviewer
<title>Clipboard Test</title>
<hr>
<applet code="ClipboardTest.class" width=355 height=130>
</applet>
<hr>

(Review ID: 39677)
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