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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 MainClass extends Frame implements ClipboardOwner, ActionListener {
TextArea srcText, dstText;
Button copyButton, pasteButton;
Clipboard clipboard = getToolkit().getSystemClipboard();
public MainClass() {
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) {
MainClass test = new MainClass();
test.setVisible(true);
}
}
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