Re: Swing Text components

Here is the code snippet:

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import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.datatransfer.*;

public class NewMessage extends JFrame implements ActionListener,
KeyListener {
    private Clipboard clipboard;
    private JTextField tofield;
    private JTextField ccfield;
    private JTextField subfield;
    private TextArea bodyarea;

    public NewMessage() {

                ...

        Container contents = this.getContentPane();
        contents.setLayout(new BorderLayout());
        clipboard = Toolkit.getDefaultToolkit().getSystemClipboard();

        JMenuBar menubar = new JMenuBar();
        contents.add(menubar, BorderLayout.NORTH);

                ...

        JSplitPane messpane = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT);
        messpane.setEnabled(false);
        messpane.setDividerSize(0);
        contents.add(messpane, BorderLayout.CENTER);

        JPanel labelpane = new JPanel(new GridLayout(0, 1));
        messpane.add(labelpane, JSplitPane.LEFT);

        JLabel fromlabel = new JLabel(" From: ");
        labelpane.add(fromlabel);
        JLabel tolabel = new JLabel(" To: ");
        labelpane.add(tolabel);
        JLabel cclabel = new JLabel(" Cc: ");
        labelpane.add(cclabel);
        JLabel sublabel = new JLabel(" Subject: ");
        labelpane.add(sublabel);

        JPanel textpane = new JPanel(new GridLayout(0, 1));
        messpane.add(textpane);

        frombox = new JComboBox();
        textpane.add(frombox);
        tofield = new JTextField(50);
        textpane.add(tofield);
        ccfield = new JTextField(50);
        textpane.add(ccfield);
        subfield = new JTextField(50);
        textpane.add(subfield);

        JPanel bodypane = new JPanel();
        contents.add(bodypane, BorderLayout.SOUTH);

        int fontHeight = getFontMetrics(getFont()).getHeight();
        bodyarea = new TextArea("", (this.getHeight() - (fontHeight * 9))
                / fontHeight, ((getWidth() - 30) / 7),
                TextArea.SCROLLBARS_VERTICAL_ONLY);
        bodypane.add(bodyarea);

        addKeyListener(this);
        setVisible(true);
    }

    public static void main(String args[]) {
        new NewMessage();
    }

    public void actionPerformed(ActionEvent ae) {

        if (ae.getActionCommand().equals("Exit")) {
            this.dispose();
        }

        else if (ae.getActionCommand().equals("Copy")) {
            clipboard.setContents(new StringSelection(""), null);
            ...
            clipboard.setContents(new StringSelection(selText), null);
        }

        else if (ae.getActionCommand().equals("Cut")) {
            clipboard.setContents(new StringSelection(""), null);
            String selText = "'";
            ...
            clipboard.setContents(new StringSelection(selText), null);
        }

        else if (ae.getActionCommand().equals("Paste")) {
            if (tofield.hasFocus())
                JOptionPane.showMessageDialog(this, "To: field has focus");
            else if (ccfield.hasFocus())
                JOptionPane.showMessageDialog(this, "CC: field has focus");
            else if (subfield.hasFocus())
                JOptionPane.showMessageDialog(this, "Sub: field has focus");
            else if (bodyarea.hasFocus())
                JOptionPane.showMessageDialog(this, "Bodyarea has focus");
            System.out.println(getFocusOwner().toString());
        }
    }

    public void addKeyListener(KeyListener arg0) {
        tofield.addKeyListener(arg0);
        ccfield.addKeyListener(arg0);
        subfield.addKeyListener(arg0);
    }
}

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Here is a link to the complete code: www.cse.iitb.ac.in/~sameer/prob.htm
This file can be run standalone simply by "javac NewMessage.java" and
"java NewMessage".

Hope someone can figure out the problem from this. Thank you