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ClipboardTest.javaAPI DocExample2838Sun Feb 22 21:39:22 GMT 2004None

ClipboardTest

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

Fields Summary
TextArea
srcText
TextArea
dstText
Button
copyButton
Button
pasteButton
Clipboard
clipboard
Constructors Summary
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();
Methods Summary
public voidactionPerformed(java.awt.event.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 voidlostOwnership(java.awt.datatransfer.Clipboard clipboard, java.awt.datatransfer.Transferable contents)

       System.out.println("Clipboard contents replaced");
public static voidmain(java.lang.String[] args)

        ClipboardTest test = new ClipboardTest();
        test.setVisible(true);